ATTORNEY-CLIENT PRIVILEGED / WORK PRODUCT DOCTRINE — DO NOT DISCLOSE
CALDERWOOD & HARKNESS LLP 555 California Street, 40th Floor San Francisco, California 94104
PRIVILEGED & CONFIDENTIAL ATTORNEY WORK PRODUCT — INTERNAL MEMORANDUM
September 15, 2022
MEMORANDUM
PRIVILEGE LEGEND: This memorandum constitutes attorney work product prepared in anticipation of litigation and contains confidential attorney-client communications. It is protected by the attorney-client privilege, the work product doctrine, and all other applicable privileges under federal and state law. This memorandum reflects the mental impressions, conclusions, opinions, and legal theories of the attorneys of Calderwood & Harkness LLP. It is intended solely for the use of the addressees and the client, Torchlight Mining Corp., and its authorized representatives. Do not copy, forward, distribute, or otherwise disclose this memorandum or any portion thereof without the express written authorization of Elaine Forsythe, Responsible Partner. Any unauthorized disclosure may constitute a waiver of applicable privileges and protections.
Right-click to update Table of Contents
I. Executive Summary
This memorandum sets forth the findings of our analysis of encrypted-messaging communications recovered from the VaultChat platform involving Gavin Holt, former Vice President of U.S. Specialty Minerals Sales at Torchlight Mining Corp. ("TMC" or the "Company"). These communications were recovered from TMC systems and produced documents as part of the internal investigation being conducted by Calderwood & Harkness LLP on behalf of TMC in connection with Grand Jury Investigation No. GJ-22-0194, currently pending before the U.S. District Court for the Northern District of California, San Francisco Division.
Gavin Holt served as Vice President, U.S. Specialty Minerals Sales at TMC from approximately 2016 through September 30, 2021. In that capacity, Holt led TMC's commercial pricing function for the U.S. Specialty Minerals Division, exercising direct authority over pricing decisions, customer relationships, and competitive positioning for the Division's principal product lines. Holt resigned from TMC effective September 30, 2021 — approximately four months before the DOJ Antitrust Division commenced its grand jury investigation on February 10, 2022. The circumstances of Holt's departure, including its timing relative to the initiation of the government's inquiry, remain a subject of ongoing analysis.
Our review has identified at least 37 documented VaultChat exchanges between Holt and counterparts at two of TMC's principal competitors: Carl Edgerton, Vice President of Sales at Ridgecrest Minerals Inc. ("Ridgecrest"), and Kevin Tsang, former Senior Vice President, Commercial Operations at Pinnacle Earth Resources Ltd. ("Pinnacle"). These exchanges span the period from March 2017 through approximately July 2021, a timeframe that aligns substantially with the DOJ's alleged conspiracy period of approximately January 2017 through August 2021.
The recovered communications have been categorized into three principal subject-matter categories, each of which corresponds to a distinct theory of antitrust liability being pursued by the DOJ Antitrust Division:
1. Pricing Discussions (19 of 37 exchanges, approximately 51%): Exchanges involving the sharing of proposed or planned pricing for high-purity feldspar, industrial talc, and/or rare-earth concentrates; agreements on pricing floors or ranges; and advance notice of price increases or decreases among the competitors.
2. Customer Allocation (11 of 37 exchanges, approximately 30%): Exchanges involving the identification of specific U.S. industrial and chemical-manufacturing customers and agreements regarding which competitor would serve or refrain from pursuing particular accounts.
3. Bid Coordination (7 of 37 exchanges, approximately 19%): Exchanges involving specific requests for proposals or bid invitations, including agreements on designated "winners," cover bids, and decisions to refrain from competitive bidding.
All three categories of communications relate to the products at the center of the DOJ's investigation — high-purity feldspar, industrial talc, and rare-earth concentrates — sold to U.S. industrial and chemical-manufacturing customers. These communications constitute the most direct and damaging evidence of inter-competitor coordination that has been identified to date in the internal investigation, and they are central to the DOJ Antitrust Division's investigation into suspected price-fixing, market allocation, and bid-rigging in the North American specialty-minerals sector.
This memorandum has been prepared to support Calderwood & Harkness's ongoing internal investigation on behalf of TMC and to inform the defense strategy and cooperation posture that will be presented to TMC's Board of Directors and, in due course, to the DOJ. The analysis herein should be read in conjunction with the forthcoming Pricing Data Analysis Memorandum (expected November 1, 2022) and the Trade Association Meeting Analysis memorandum (expected October 10, 2022), each of which will provide additional context and corroboration for the findings set forth below.
II. Background
A. The DOJ Investigation
The Antitrust Division of the United States Department of Justice, through its San Francisco Field Office, opened Grand Jury Investigation No. GJ-22-0194 on February 10, 2022. The investigation is focused on suspected price-fixing, market allocation, and bid-rigging in the North American specialty-minerals sector, with particular emphasis on three product categories: high-purity feldspar, industrial talc, and rare-earth concentrates.
The investigation is being led by Trial Attorney Denise Kowalski and Senior Trial Attorney Marcus Reeves, both of the Antitrust Division's San Francisco Field Office. The prosecution team is supervised by Deputy Assistant Attorney General Julia Stafford-Hayes. The grand jury is empaneled in the United States District Court for the Northern District of California, San Francisco Division.
The investigation was triggered by the cooperation agreement entered into by Cascade Chemical Supply Co. ("Cascade"), a specialty-chemical distribution company headquartered in Spokane, Washington. Cascade is led by its President, Leonard Massey. In approximately September 2021, Cascade, represented by Whitfield, Strauss & Tully LLP (lead partner Rebecca Ostrander), entered into a cooperation agreement with the DOJ Antitrust Division, pursuant to which Cascade provided documents, witness testimony, and other evidence that precipitated the broader probe into pricing and allocation practices in the specialty-minerals sector. Although the precise scope of Cascade's cooperation is not fully known to TMC or Calderwood & Harkness, it is understood from DOJ representations and publicly available court filings that Cascade provided evidence of coordinated pricing conduct among suppliers from whom Cascade purchased minerals, including TMC, Ridgecrest, and Pinnacle.
TMC received Grand Jury Subpoena No. GJ-22-0194-SD-003, commanding the production of documents and records relating to TMC's pricing, sales, and competitive activities in the specialty-minerals sector, on February 14, 2022. TMC's General Counsel, Priya Anand, promptly engaged Calderwood & Harkness LLP on February 18, 2022, and the firm has served as TMC's outside defense counsel for all matters related to the investigation since that date.
On May 20, 2022, TMC received a target letter from the DOJ Antitrust Division, formally notifying the Company that it is a target of the grand jury investigation. The target letter identified TMC as a suspected participant in agreements to fix prices, allocate customers, and rig bids for high-purity feldspar, industrial talc, and rare-earth concentrates sold to U.S. customers during the period from approximately January 2017 through approximately August 2021.
The other companies identified as co-subjects or co-targets of the investigation include:
Ridgecrest Minerals Inc. — A Delaware corporation headquartered at 1700 Lincoln Street, Suite 4200, Denver, Colorado 80203. Ridgecrest is led by its Chief Executive Officer, Brian Novotny, and is a portfolio company of Marlowe Asset Management Peak Capital Partners LP, a Denver-based private equity fund. Ridgecrest is represented in the investigation by Davenport, Kline & Archer LLP, with lead partner Helen Marchetti. Ridgecrest received a target letter from the DOJ on approximately January 12, 2022 — predating TMC's target letter by several months — which suggests that Ridgecrest may have been identified as a subject of the investigation at an earlier stage, potentially based on evidence provided by Cascade.
Pinnacle Earth Resources Ltd. — An Ontario corporation headquartered at 85 Elm Street West, Suite 600, Sudbury, Ontario P3C 1T3, Canada, with U.S. operations based at 222 South Main Street, Suite 1500, Salt Lake City, Utah 84101. Pinnacle is led by its Chief Executive Officer, Douglas Harlowe. Pinnacle is represented in the investigation by Ashford Whitmore LLP, with lead partner George Nakamura. Pinnacle's specific status in the investigation (i.e., whether it has received a target letter) is not confirmed, although DOJ materials identify Pinnacle as a key participant in the suspected conduct.
The products at issue in the investigation are high-purity feldspar (a silicate mineral used in ceramics, glass manufacturing, and specialty coatings), industrial talc (used in paper, plastics, paints, and pharmaceutical applications), and rare-earth concentrates (used in electronics, automotive, defense, and energy applications). These products are sold primarily to U.S. industrial and chemical-manufacturing customers through a combination of long-term supply contracts, spot sales, and competitive bidding processes.
The DOJ estimates that the total volume of commerce affected by the alleged conspiracy is approximately USD 1.34 billion over the conspiracy period of approximately January 2017 through August 2021. TMC's share of the affected commerce is estimated at approximately USD 478 million, representing approximately 35.7% of the total. These figures are significant for purposes of potential fines and penalties under the Sentencing Guidelines, as the base fine under U.S.S.G. § 2R1.1 is calculated as a percentage of the volume of affected commerce.
B. VaultChat Platform Overview
VaultChat is a commercially available encrypted-messaging application designed to provide secure, private communications between users. The platform is marketed primarily to business professionals and individuals who require heightened communication security, and it operates independently of corporate email and messaging systems. VaultChat was utilized by Gavin Holt and his counterparts at Ridgecrest and Pinnacle — Carl Edgerton and Kevin Tsang, respectively — as the primary channel for their inter-competitor communications outside of in-person meetings.
The key technical characteristics of VaultChat that are relevant to this investigation include:
End-to-End Encryption. VaultChat employs end-to-end encryption protocols, meaning that messages are encrypted on the sender's device and can only be decrypted on the recipient's device. Neither VaultChat's servers nor any intermediary can read the contents of messages in transit or at rest on VaultChat's infrastructure. This encryption significantly limits the ability of third parties — including law enforcement, corporate IT departments, and forensic investigators — to intercept or recover message contents from the platform's servers.
Ephemeral Messaging Capabilities. VaultChat offers configurable auto-delete timers that allow users to set messages to self-destruct after a specified period (e.g., 30 seconds, 5 minutes, 1 hour, 24 hours, or custom intervals). Once an ephemeral message's timer expires, the message is permanently deleted from both the sender's and recipient's devices. This feature is specifically designed to leave no recoverable trace of the communication, and it is the principal reason that a significant but unquantifiable volume of communications between Holt and his counterparts is believed to have been lost.
Multi-Device Operation. VaultChat can be installed and operated on personal mobile devices, corporate mobile devices, laptops, tablets, and desktop computers. The application can run concurrently on multiple devices linked to a single user account. Holt appears to have used VaultChat on both his TMC-issued corporate laptop and at least one personal device.
Non-Corporate Infrastructure. VaultChat operates entirely outside of corporate email and messaging infrastructure. Messages sent and received through VaultChat are not captured by corporate email archiving systems, corporate data-loss-prevention tools, or standard corporate document-retention systems. The platform is specifically designed to exist beyond the reach of corporate oversight and compliance monitoring.
The use of an encrypted, non-corporate messaging platform for inter-competitor communications is itself probative of intent to conceal. Courts have consistently recognized that the deliberate use of communication channels designed to avoid corporate recordkeeping and regulatory oversight constitutes evidence of consciousness of guilt. See, e.g., United States v. Andreas, 216 F.3d 645, 666–67 (7th Cir. 2000) (evidence of secrecy relevant to intent); United States v. Socony-Vacuum Oil Co., 310 U.S. 150, 224 n.59 (1940) (concealment evidence probative of illegality). The deliberate selection of VaultChat as the communication channel — rather than corporate email, telephone, or other monitored systems — strongly suggests that Holt, Edgerton, and Tsang were aware that their communications would be viewed as improper and took affirmative steps to prevent detection.
C. Data Collection and Recovery
Calderwood & Harkness retained Redstone Digital Forensics Inc. ("Redstone"), a digital forensics and electronic discovery firm headquartered in McLean, Virginia, on March 15, 2022, for purposes of forensic data collection, processing, hosting, and analysis in connection with this matter. The engagement is supervised by Neil Ashworth, Redstone's project director for the TMC matter.
Redstone performed forensic data collection from 34 identified custodians' devices and data sources at TMC, including current and former employees identified as potentially possessing relevant information based on TMC's organizational structure, the scope of the grand jury subpoena, and input from TMC's General Counsel and IT department. Among the 34 custodians, the data sources associated with Gavin Holt were of particular significance.
The forensic collection from Holt-related sources included the following:
(a) Holt's former corporate laptop. Holt returned his TMC-issued laptop upon his departure from the Company on September 30, 2021, consistent with TMC's standard offboarding procedures. The laptop was stored in TMC's IT department inventory. Redstone created a forensic image of the laptop's hard drive, including deleted files and residual data. The forensic image captured cached VaultChat application data, including locally stored message fragments, database files, and application logs that had not been fully purged from the device.
(b) Holt's former corporate mobile device. Holt also returned his TMC-issued mobile device upon departure. Redstone created a forensic image of this device, which yielded limited but relevant VaultChat-related data, including application installation records and partial notification logs.
(c) Device backups stored on TMC's cloud backup system. TMC's IT infrastructure includes an automated cloud backup system that periodically backs up data from corporate-issued devices. Redstone identified and collected backup snapshots from Holt's corporate laptop and mobile device that predated his departure and contained additional cached VaultChat data not present on the devices at the time of imaging.
(d) Server-side residual data from TMC's IT infrastructure. Redstone examined TMC's corporate email servers, network file shares, and cloud storage systems for VaultChat-related artifacts. This examination identified instances in which Holt had forwarded VaultChat message content — including screenshots and excerpted text — to his own corporate email address or had saved message content in personal note files stored on TMC's network. These self-forwarded materials constitute a critical source of recoverable VaultChat content.
It bears emphasis that VaultChat messages were not captured by TMC's standard document retention systems. The recovery of VaultChat content required specialized forensic extraction techniques, including the analysis of cached application data, the reconstruction of partially deleted database entries, and the identification of VaultChat content that Holt had transferred to other media (i.e., email forwards and note files). The recovery was neither routine nor complete.
Due to the ephemeral-messaging function of VaultChat, an unknown and likely substantial volume of communications between Holt and his counterparts was permanently deleted and is unrecoverable by any known forensic technique. The 37 documented exchanges identified in this memorandum represent the recoverable portion of the total communications and likely undercount — potentially by a significant margin — the actual number and scope of inter-competitor exchanges that occurred over the approximately four-and-a-half-year period from March 2017 through July 2021.
As of the date of this memorandum, TMC's cumulative document production to the DOJ (through ongoing rolling productions pursuant to Subpoena No. GJ-22-0194-SD-003) comprises approximately 487,000 documents. The VaultChat-related subset of this production constitutes approximately 310 individual artifacts, including recovered message text, screenshots, metadata records, application log entries, and related email forwards. These 310 artifacts encompass the 37 discrete exchanges analyzed in this memorandum, together with supporting contextual material, metadata, and duplicative or fragmentary records.
D. Individuals Involved in the Communications
The VaultChat communications analyzed in this memorandum involve three principal participants:
Gavin Holt — Former Vice President, U.S. Specialty Minerals Sales, Torchlight Mining Corp. Holt joined TMC in approximately 2010 and was promoted to the VP role in 2016. In that capacity, he led TMC's commercial pricing function for the U.S. Specialty Minerals Division, with direct authority over pricing decisions, customer relationships, competitive strategy, and sales-team management for the Division's three principal product lines (high-purity feldspar, industrial talc, and rare-earth concentrates). Holt resigned from TMC effective September 30, 2021. As noted above, his departure preceded the commencement of the grand jury investigation by approximately four months. Following the initiation of the investigation and TMC's engagement of Calderwood & Harkness, Holt retained personal counsel at Briarcliff Law Group PLLC (San Francisco), with lead attorney Patrick Dunleavy, on approximately June 10, 2022. On June 14, 2022, Holt appeared before the grand jury and asserted his Fifth Amendment privilege against self-incrimination, declining to provide testimony. Subsequently, on the advice of his counsel, Holt refused to participate in TMC's internal investigation interview, as documented in the Calderwood & Harkness memorandum dated August 5, 2022 (the "Holt Interview Refusal Memorandum"). The Non-Prosecution Agreement ("NPA") currently being explored by TMC with the DOJ is expected to carve Holt out from the Company's cooperation benefits — the DOJ reserves the right to pursue criminal charges against Holt individually.
Carl Edgerton — Vice President of Sales, Ridgecrest Minerals Inc., 1700 Lincoln Street, Suite 4200, Denver, Colorado 80203. Edgerton has served in this role at Ridgecrest during the entirety of the alleged conspiracy period. He is identified in DOJ materials as a key participant in the suspected price-fixing, customer-allocation, and bid-rigging conduct. As noted, Ridgecrest is a portfolio company of Marlowe Asset Management Peak Capital Partners LP. Edgerton's individual legal representation, if any, is not known to Calderwood & Harkness at this time. Edgerton is the most frequent VaultChat interlocutor with Holt, appearing in approximately 22 of the 37 documented exchanges (bilateral) and all 5 of the trilateral exchanges.
Kevin Tsang — Former Senior Vice President, Commercial Operations, Pinnacle Earth Resources Ltd., 85 Elm Street West, Suite 600, Sudbury, Ontario P3C 1T3, Canada (U.S. operations: 222 South Main Street, Suite 1500, Salt Lake City, Utah 84101). Tsang is a key individual identified in the DOJ's investigation. He appears in approximately 10 of the 37 documented bilateral exchanges with Holt and in all 5 of the trilateral exchanges that also included Edgerton. Tsang's current employment status at Pinnacle and his individual legal representation are not confirmed.
III. Methodology
A. Collection and Identification Protocol
As described in Section II.C above, Redstone Digital Forensics created forensic images of Gavin Holt's corporate laptop and corporate mobile device, extracted cached VaultChat application data and database files from those images, collected device backups from TMC's cloud backup systems, and searched TMC's corporate email archives and network file shares for VaultChat-related artifacts forwarded or saved by Holt.
To identify VaultChat-related artifacts within the broader document population collected from all 34 custodians, the Calderwood & Harkness review team, in coordination with Redstone, developed and applied a comprehensive set of keyword search terms. The primary search terms included:
"VaultChat," "VC," "Vault Chat," "Edgerton," "Carl Edgerton," "Tsang," "Kevin Tsang," "Ridgecrest," "Pinnacle," "feldspar," "talc," "rare-earth," "rare earth," "REE," "price," "pricing," "price list," "price increase," "bid," "RFP," "tender," "proposal," "customer," "account," "allocat*," "assignment," "territory," "stay away," "cover bid," "complementary bid," "your account," "my account," "mine," "coordination," "align," "alignment," "match," "follow," "undercutting," "undercut," and approximately 40 additional search terms developed iteratively by the Calderwood & Harkness review team based on initial review findings and the evolving understanding of the participants' communication patterns and terminology.
The date range for the keyword searches was set at January 1, 2015 through December 31, 2021. This range extends approximately two years before the beginning of the alleged conspiracy period (January 2017) and approximately four months after the end of the alleged conspiracy period (August 2021). The extended date range was adopted to capture any pre-conspiracy communications that might provide context regarding the formation of the alleged agreements and any post-conspiracy communications that might reflect the wind-down or continuation of the conduct.
Redstone performed standard deduplication across data sources to eliminate exact-duplicate documents and near-duplicate variants, using MD5 hash values and metadata-based deduplication protocols. Metadata analysis was performed on all identified artifacts, including extraction and normalization of timestamps, sender/recipient information, device-of-origin identifiers, and file-path information. The results of the keyword searches and deduplication process were loaded into the Relativity document review platform hosted by Redstone for attorney review.
B. Review Protocol
All VaultChat-related artifacts identified through the collection and search process described above were reviewed by Calderwood & Harkness attorneys. The review was conducted primarily by Aaron Liu (Lead Associate) and Monica Reyes (Associate), with the assistance of a team of six contract attorneys engaged through Calderwood & Harkness's document review program. All contract attorneys were supervised directly by Liu and Reyes, operated under the firm's standard confidentiality and conflict protocols, and received case-specific training regarding the factual background, legal issues, and coding categories applicable to the VaultChat review.
Each VaultChat-related artifact was reviewed and coded according to the following fields:
(1) Date and Time: The date and time of the communication, as reflected in the message metadata, screenshot timestamp, or related email forward date.
(2) Participants (Sender/Recipient): Identification of the participants in the exchange, including determination of whether the exchange was bilateral (Holt-Edgerton, Holt-Tsang) or trilateral (Holt-Edgerton-Tsang).
(3) Subject-Matter Category: Classification of the exchange into one of three primary subject-matter categories — (a) pricing discussions, (b) customer allocation, or (c) bid coordination — or into a residual category of "other/social" for communications that did not contain substantive competitive content. Where an exchange spanned multiple categories, the artifact was classified by its primary subject matter, with secondary classifications noted in the coding comments.
(4) Specific Product Referenced: Identification of the specific product or products discussed in the exchange — high-purity feldspar, industrial talc, rare-earth concentrates, or unspecified/general.
(5) Specific Customer or Bid Referenced: Where identifiable, the specific customer name or bid opportunity referenced in the exchange. Customer names and bid details were recorded in the underlying coding database and are referenced by code in this memorandum to avoid unnecessary disclosure of customer identities in this work-product document.
(6) Presence of Agreed-Upon Pricing Terms or Commitments: Whether the exchange contained or evidenced an explicit or implicit agreement, understanding, or commitment regarding pricing, customer assignment, or bid outcome.
Privilege review of all VaultChat-related artifacts was conducted in accordance with the Privilege Review Protocol dated March 10, 2022, which was developed by Calderwood & Harkness and approved by Elaine Forsythe in connection with the firm's overall document review and production workflow for this matter. As discussed further in Section X.C below, no attorney-client privileged communications were identified within the VaultChat dataset itself, as the communications were between Holt and non-attorney third parties (Edgerton and Tsang) and did not involve any attorneys.
The substantive findings from the VaultChat review were cross-referenced with two critical sources of corroborating evidence:
(a) Sandra Chu's interview testimony (July 18, 2022). Chu, who serves as Director of Pricing Analytics in TMC's U.S. Specialty Minerals Division, was interviewed by Calderwood & Harkness as part of the internal investigation. Chu's testimony regarding Holt's pricing-adjustment instructions and the timing of those instructions was compared with the VaultChat pricing exchanges to assess temporal correlations.
(b) Thomas Eriksen's interview testimony (July 22, 2022). Eriksen, who serves as Regional Sales Manager for TMC's Western Region, was interviewed regarding his attendance at conferences hosted by the North American Specialty Minerals Council ("NASMC"), a trade association. Eriksen's testimony regarding conference dates, attendees, and side meetings was compared with the timing of VaultChat exchanges to assess correlations between in-person industry events and electronic communications.
C. Limitations
Several significant limitations apply to the analysis presented in this memorandum, and they should be borne in mind when assessing the completeness of the evidentiary record:
Ephemeral Messaging. The auto-delete function of VaultChat means that an unknown — and potentially very large — volume of communications between Holt, Edgerton, and Tsang was permanently destroyed and is not recoverable through any known forensic technique. The 37 documented exchanges analyzed in this memorandum represent a floor, not a ceiling, of the total inter-competitor communications that occurred via VaultChat during the relevant period. It is reasonable to infer, based on the frequency and consistency of the recovered communications over the four-and-a-half-year period, that the actual volume of communications was substantially greater.
Unavailability of Holt's Personal Devices. Holt departed TMC on September 30, 2021, and returned his corporate-issued devices. However, Holt's personal devices — including any personal mobile phones, tablets, or computers on which VaultChat may have been installed — remain in Holt's possession and are not available for forensic collection. Holt's personal counsel at Briarcliff Law Group PLLC (Patrick Dunleavy) has not consented to any voluntary production of Holt's personal devices or the data contained thereon. Absent compulsory process initiated by the DOJ (e.g., a search warrant or grand jury subpoena directed to Holt), Calderwood & Harkness has no mechanism to compel access to these devices.
Fragmentary Artifacts. Some of the recovered VaultChat artifacts are fragmentary in nature. For example, certain screenshots captured by Holt show only a portion of a longer message thread, with earlier or later messages truncated or not visible in the screenshot frame. Similarly, some cached database entries recovered from the laptop forensic image contain partial message text or corrupted data fields. Where artifacts are fragmentary, the analysis in this memorandum notes the limitation and bases its conclusions on the available content.
Timestamp Normalization. Metadata timestamps associated with the recovered VaultChat artifacts reflect the local time zone settings of the device from which the artifact was recovered. Because Holt's corporate laptop and mobile device were configured for Pacific Time, and because Holt traveled for business to various time zones during the relevant period, some timestamps may not precisely reflect the actual time of the communication. Redstone normalized all timestamps to Pacific Time (PT) for consistency, applying standard time-zone conversion protocols. Minor discrepancies (on the order of hours) may exist for communications initiated while Holt was traveling.
IV. Summary of Findings — Overview of the 37 Documented Exchanges
A. Chronological Distribution
The 37 documented VaultChat exchanges span a period of approximately four years and four months, from the earliest documented exchange on March 14, 2017 to the latest documented exchange in approximately July 2021. This timeframe aligns substantially with the DOJ's alleged conspiracy period of approximately January 2017 through August 2021.
The distribution of exchanges by calendar year is as follows:
The data reveals a discernible pattern: the frequency of documented exchanges increased from 2017 (6 exchanges) through 2019 (10 exchanges), reaching its peak during the 2018–2019 period. The frequency then modestly decreased in 2020 (7 exchanges) and 2021 (5 exchanges). The reduction in 2020 may correlate with disruptions caused by the COVID-19 pandemic, which significantly affected the specialty-minerals sector through supply-chain interruptions, facility closures, and reduced customer demand during the first half of 2020. The further reduction in 2021 (only 5 exchanges through July) may reflect either a genuine decline in communication frequency, the increasing use of ephemeral-delete settings that prevented recovery, or a combination of both factors. It is also possible that Holt became more cautious in his communications in 2021 as rumors of regulatory scrutiny in the sector began to circulate, though no direct evidence of this hypothesis has been identified.
The earliest documented exchange — dated March 14, 2017 — is discussed in detail in Section V.B below. While this exchange is the first documented VaultChat communication, it does not necessarily represent the first actual VaultChat communication between Holt and Edgerton. The conversational tone and established nature of the exchange suggest a pre-existing relationship and possibly prior VaultChat communications that were not recovered.
B. Participants
The 37 documented exchanges involve three categories of participant groupings:
The Holt-Edgerton bilateral channel was the most active, accounting for nearly 60% of all documented exchanges. This is consistent with the competitive landscape, as TMC and Ridgecrest are the two largest North American producers of high-purity feldspar and industrial talc and compete most directly for U.S. customers in those product categories. The Holt-Tsang bilateral channel, accounting for 27% of exchanges, reflects the more limited but still significant competitive overlap between TMC and Pinnacle, particularly in rare-earth concentrates. The trilateral group exchanges (13.5%) appear to have served as coordination forums for broader, multi-product discussions involving all three competitors simultaneously.
Critically, no other TMC personnel have been identified as participants in VaultChat communications with competitors. The evidence reviewed to date indicates that the VaultChat communications were confined to Holt, acting alone on behalf of TMC, and his counterparts Edgerton and Tsang. Specifically, there is no evidence that Sandra Chu (Director, Pricing Analytics), Thomas Eriksen (Regional Sales Manager, Western Region), Priya Anand (General Counsel), Søren Dalmqvist (Chief Executive Officer), or any other TMC employee had direct access to, visibility into, or knowledge of the VaultChat exchanges between Holt and his competitor counterparts. This finding is significant for purposes of assessing the scope of individual exposure within TMC and for supporting the Company's cooperation narrative, as discussed in Sections IX and X below.
C. Subject-Matter Categorization
The 37 documented exchanges have been classified into three primary subject-matter categories based on the predominant content of each exchange. The categorization is as follows:
Category 1 — Pricing Discussions (19 of 37 exchanges, approximately 51%). These exchanges involved discussions regarding current or planned pricing for high-purity feldspar, industrial talc, and/or rare-earth concentrates. The communications include: the sharing of proposed or draft price lists between competitors; agreements on pricing floors, ceilings, or ranges for specific products; advance notice of planned price increases or decreases; discussions regarding the timing and magnitude of price adjustments; and confirmations that one competitor would follow or match another's pricing moves. Pricing discussions represent the largest single category of VaultChat communications.
Category 2 — Customer Allocation (11 of 37 exchanges, approximately 30%). These exchanges involved discussions regarding which competitor would serve or refrain from pursuing particular U.S. industrial and chemical-manufacturing customers. The communications include: identification of specific customer accounts by name; designation of customers as belonging to a particular competitor ("your account," "mine"); agreements by one competitor to "stay away" from another's designated accounts; and discussions regarding the division of new or contested customer relationships. Customer-allocation discussions represent the second-largest category of VaultChat communications.
Category 3 — Bid Coordination (7 of 37 exchanges, approximately 19%). These exchanges involved discussions regarding upcoming bid opportunities — specifically, requests for proposals (RFPs) or bid invitations issued by specific U.S. industrial and chemical-manufacturing customers. The communications include: identification of upcoming bid opportunities; agreement on which party would submit the winning bid and at what approximate price level; agreement that losing parties would submit non-competitive "cover" bids or "complementary" bids to create the appearance of competitive bidding; and agreement by one competitor to decline to bid entirely on a specific opportunity. Bid-coordination discussions, while the smallest category, are among the most directly probative of per se antitrust violations.
It should be noted that several exchanges span multiple categories. For example, a pricing discussion may also reference a specific customer (implicating both Category 1 and Category 2), or a bid-coordination exchange may include discussion of the price level at which the designated winner will bid (implicating both Category 3 and Category 1). Where an exchange contained elements of multiple categories, it was classified by its primary subject matter — i.e., the category that best characterized the predominant purpose and content of the exchange. Secondary classifications are recorded in the coding database.
The products referenced across all 37 exchanges are distributed as follows:
High-purity feldspar is the most frequently referenced product, consistent with its position as the highest-volume and highest-revenue product in TMC's U.S. Specialty Minerals Division and the product where TMC and Ridgecrest compete most directly. Industrial talc is the second most frequently referenced product, reflecting the significant competitive overlap among all three companies in that category. Rare-earth concentrates are referenced less frequently but appear primarily in the Holt-Tsang bilateral exchanges, consistent with Pinnacle's stronger competitive position in that product category.
V. Detailed Analysis — Category 1: Pricing Discussions (19 Exchanges)
A. Nature and Pattern of Pricing Communications
The 19 pricing-related exchanges reveal a consistent and recurring pattern of inter-competitor price coordination that persisted throughout the alleged conspiracy period. The communications demonstrate that Holt, Edgerton, and Tsang engaged in a systematic practice of sharing confidential pricing information, coordinating the timing and magnitude of price adjustments, and confirming mutual adherence to agreed-upon pricing levels.
Holt and Edgerton (Ridgecrest) communicated most frequently on pricing matters relating to high-purity feldspar and industrial talc. This is consistent with the competitive landscape: TMC and Ridgecrest are the two largest North American producers of both products, and their pricing decisions exert outsized influence on market prices in the U.S. specialty-minerals sector. The Holt-Edgerton pricing exchanges follow a recognizable pattern:
(i) Initiation. One party (most frequently Holt) would initiate a VaultChat exchange by sharing TMC's proposed or draft price-list adjustments for an upcoming pricing cycle (typically quarterly or semi-annual).
(ii) Reciprocation. The other party (typically Edgerton) would reciprocate by sharing Ridgecrest's planned pricing for the same period and products.
(iii) Alignment Discussion. The parties would discuss any discrepancies between their respective pricing proposals and negotiate adjustments to achieve alignment — i.e., to ensure that neither company's pricing would materially undercut the other's.
(iv) Confirmation. The exchange would conclude with a confirmation that both parties would implement their aligned pricing within the agreed timeframe.
Holt and Tsang (Pinnacle) communicated on pricing matters relating primarily to rare-earth concentrates and, to a lesser extent, industrial talc. These exchanges followed a similar pattern but were somewhat less frequent and less detailed, reflecting the narrower product overlap between TMC and Pinnacle.
The trilateral communications — involving all three participants — typically occurred in advance of quarterly pricing cycles and served as coordination forums for broader pricing alignment across all three product categories and all three competitors simultaneously. These trilateral exchanges appear to have functioned as "summit" discussions in which the parties established overarching pricing parameters that would then be refined through subsequent bilateral exchanges.
B. Illustrative Exchanges (Selected Examples)
The following exchanges are representative of the pricing-coordination communications identified in the VaultChat dataset. For each exchange, we provide the date, participants, a summary of the content, and an assessment of its evidentiary significance. Specific customer names, pricing figures, and other commercially sensitive details are referenced by code or in general terms in this memorandum; full details are set forth in the underlying exhibit log maintained by Redstone Digital Forensics.
Exchange #1 — March 14, 2017 (Holt to Edgerton, bilateral)
This is the earliest documented VaultChat exchange. The exchange was initiated by Holt, who sent Edgerton a message sharing TMC's planned Q2 2017 price list for high-purity feldspar. The message included specific per-ton pricing figures for multiple feldspar grades. Holt's message included language to the effect of: "Here's where we're going — make sure you're in the same neighborhood." Edgerton responded within approximately two hours, sharing Ridgecrest's Q2 2017 feldspar pricing and confirming that Ridgecrest's proposed pricing was aligned with TMC's figures. Edgerton's response included words to the effect of acknowledging the pricing and indicating that Ridgecrest would "match up."
This exchange is significant as it establishes the earliest documented instance of pricing coordination between Holt and Edgerton via VaultChat. The language used — "make sure you're in the same neighborhood" — reflects an expectation of coordinated pricing and an understanding that both parties would set their prices in alignment with each other. The casual and directive tone of Holt's message suggests a level of familiarity and prior understanding between the parties, which is consistent with the possibility that earlier, unrecovered VaultChat communications or in-person discussions had already established the framework for this coordination.
Exchange #4 — September 2017 (Holt to Edgerton and Tsang, trilateral)
This trilateral exchange involved a discussion of proposed annual price increases for industrial talc for the 2018 calendar year. Holt initiated the exchange by proposing a coordinated price increase of 6–8% across all three companies for industrial talc. The exchange reflects a back-and-forth discussion in which Holt articulated the rationale for the increase (rising production costs, tight supply conditions) and sought buy-in from both Edgerton and Tsang. Both Edgerton and Tsang expressed agreement with the proposed range, with Edgerton indicating that Ridgecrest would implement an increase at the high end of the range (closer to 8%) and Tsang indicating that Pinnacle would implement an increase near the midpoint.
This exchange is notable for several reasons. First, it is an early example of a trilateral pricing discussion — involving all three alleged co-conspirators simultaneously — which the DOJ may characterize as evidence of a multi-party agreement as opposed to separate bilateral arrangements. Second, the specific percentage range discussed (6–8%) provides a concrete, quantifiable pricing commitment that can be cross-referenced against the actual price lists published by the three companies for 2018. Third, the discussion of rationale ("rising production costs, tight supply conditions") suggests an effort by the parties to coordinate not only their pricing but also the narrative or justification they would offer to customers for the increases.
Exchange #12 — January 2019 (Holt to Edgerton, bilateral)
In this exchange, Holt shared a draft revised feldspar price list that TMC planned to implement effective Q2 2019. The draft contained specific per-ton prices for multiple feldspar grades. Holt asked Edgerton to confirm that Ridgecrest would "follow suit" by implementing a comparable price list "within a week" of TMC's publication. Edgerton responded affirmatively, confirming that Ridgecrest would publish its revised price list within the requested timeframe. The exchange also included a brief discussion of a specific feldspar grade (Grade AA) for which Holt proposed a particularly aggressive price increase, and Edgerton indicated that Ridgecrest would match the increase.
This exchange is significant because it demonstrates not only pricing alignment but also temporal coordination — the parties agreed on the sequencing and timing of their respective price publications to maintain the appearance of independent but parallel pricing decisions. The specificity of the commitment ("within a week") transforms what might otherwise appear to be mere price signaling into an explicit agreement on coordinated timing.
Exchange #18 — November 2019 (Holt to Tsang, bilateral)
In this exchange, Holt provided Tsang with advance notice of TMC's planned price increase for rare-earth concentrates, to be effective Q1 2020. Holt shared specific pricing figures and the effective date of the increase. Tsang responded by sharing Pinnacle's aligned pricing plan for the same period, confirming that Pinnacle would implement a price increase of comparable magnitude on a similar timeline. The exchange included a discussion of market conditions in the rare-earth sector, including supply constraints from Chinese producers and increasing demand from U.S. defense and technology customers.
This exchange is representative of the Holt-Tsang pricing discussions, which focused predominantly on rare-earth concentrates. The advance sharing of pricing information between competitors — particularly in a concentrated market with few producers — is a hallmark of price-fixing conduct under Section 1 of the Sherman Act.
Exchange #33 — March 2021 (Holt to Edgerton, bilateral)
This exchange occurred during the period of post-COVID-19 market recovery. Holt initiated the exchange by referencing the anticipated recovery in demand for specialty minerals and proposing coordinated price increases across feldspar and talc product lines to "make up for lost margin" during the pandemic-affected period. Edgerton agreed with the proposal and indicated that Ridgecrest was "ready to move" on pricing. The exchange included a discussion of the magnitude of the proposed increases and the target effective date.
This exchange is significant for several reasons. First, it demonstrates the continuation of pricing coordination into 2021, near the end of the alleged conspiracy period. Second, the explicit reference to "making up for lost margin" suggests that the parties viewed the coordinated pricing increases as a mechanism for recapturing revenue lost during the pandemic, rather than as independent responses to legitimate market forces. Third, the exchange occurred approximately six months before Holt's departure from TMC and approximately eleven months before the commencement of the grand jury investigation, placing it squarely within the period that the DOJ will argue represents the final phase of the conspiracy.
In addition to the five exchanges described above, the remaining 14 pricing-related exchanges document a consistent pattern of sharing proposed pricing, confirming alignment, and adjusting prices to maintain parallel pricing structures across the three competitors. The exchanges span all three product categories and cover pricing cycles throughout the alleged conspiracy period. The full details of each exchange are set forth in Exhibit A (Chronological Index) and the underlying exhibit log.
C. Correlation with Sandra Chu's Testimony
Sandra Chu, Director of Pricing Analytics in TMC's U.S. Specialty Minerals Division, was interviewed by Calderwood & Harkness attorneys (Aaron Liu and Monica Reyes) on July 18, 2022, as part of the internal investigation. Chu reported directly to Gavin Holt during his tenure as VP, U.S. Specialty Minerals Sales, and was responsible for implementing pricing decisions for the Division's product lines.
During her interview, Chu reported that she received instructions from Holt to adjust TMC's published price lists on at least 12 identified occasions during the 2017–2021 period. Chu described these instructions as typically arriving in the form of an email, phone call, or in-person directive from Holt, instructing her to revise specific price points for specific product grades to specific dollar amounts or percentage changes, often with a compressed timeline for implementation.
Cross-referencing Chu's 12 identified pricing-adjustment occasions with the 19 VaultChat pricing exchanges reveals a significant temporal correlation:
At least 9 of Chu's 12 identified pricing adjustments correlate temporally — within 1 to 5 business days — with a documented VaultChat pricing exchange between Holt and Edgerton or Holt and Tsang. In each of these 9 instances, the VaultChat exchange preceded Holt's instruction to Chu, consistent with the inference that Holt first coordinated pricing with his competitor counterpart(s) and then directed Chu to implement the agreed-upon pricing at TMC.
A detailed mapping of these correlations is set forth in Exhibit C to this memorandum.
The remaining 3 of Chu's 12 identified pricing adjustments do not correlate with any recovered VaultChat exchange. This may be because: (a) the corresponding VaultChat communications were deleted by the ephemeral-messaging function and were not recovered; (b) the pricing coordination for those occasions occurred through a different channel (e.g., in-person meeting, phone call); or (c) the pricing adjustments were, in fact, independent business decisions not related to inter-competitor coordination. Given the overall pattern of coordination documented in the VaultChat evidence, hypothesis (a) or (b) appears more likely than hypothesis (c) for at least some of the uncorrelated adjustments.
It is important to note a critical limitation of Chu's testimony: Chu stated unequivocally that she had no direct knowledge of inter-competitor communications between Holt and personnel at Ridgecrest or Pinnacle. Chu received Holt's instructions as internal business directives and implemented them in the ordinary course of her pricing-analytics role, without questioning the basis for Holt's pricing decisions. Chu was not aware of VaultChat or its use by Holt. There is no evidence that Chu was aware of, participated in, or facilitated any VaultChat communications or any other form of inter-competitor coordination. Chu's exposure in this matter is discussed further in Section IX.C below.
VI. Detailed Analysis — Category 2: Customer Allocation (11 Exchanges)
A. Nature and Pattern of Customer Allocation Communications
The 11 customer-allocation exchanges reveal a systematic effort by Holt, Edgerton, and Tsang to divide U.S. industrial and chemical-manufacturing customers among their respective companies, thereby reducing or eliminating competition for those accounts. The discussions involved identifying specific customers by name and agreeing on which competitor would serve — or refrain from pursuing — each account.
The terminology used in these communications is strikingly explicit and consistent with the language that courts and enforcement agencies have recognized as indicative of market-allocation agreements. Recurring phrases include:
• "Your account" — designating a customer as belonging to a particular competitor
• "Mine" — claiming a customer as belonging to the speaker's company
• "Stay away" — directing a competitor not to pursue a designated account
• "You take [customer name]" — explicitly assigning a customer to a particular competitor
• "We'll leave that one alone" — acknowledging that the speaker's company will not compete for a designated account
The Holt-Edgerton bilateral exchanges (7 of the 11 customer-allocation exchanges) focused on feldspar and talc customers located primarily in the western and midwestern United States — the geographic markets where TMC and Ridgecrest have the most direct competitive overlap. The discussions typically identified specific customer accounts and assigned each to one company, with the understanding that the other company would not compete for the assigned account.
The Holt-Tsang bilateral exchanges (3 of the 11 customer-allocation exchanges) focused on rare-earth concentrate customers and, to a lesser extent, industrial talc customers where TMC and Pinnacle competed. The geographic focus of these discussions included customers in the western United States and, in some instances, customers along the Gulf Coast.
The single trilateral exchange (1 of the 11 customer-allocation exchanges) involved a comprehensive, multi-product discussion of major customer assignments across all three product categories, functioning as what the DOJ may characterize as a "grand allocation" discussion among all three alleged co-conspirators.
B. Illustrative Exchanges (Selected Examples)
Exchange #3 — June 2017 (Holt to Edgerton, bilateral)
This exchange involved a detailed discussion of approximately 8 major feldspar customers and their proposed allocation between TMC and Ridgecrest. Holt initiated the discussion by identifying the 8 accounts and proposing a specific allocation: TMC would retain 5 of the accounts, and Ridgecrest would retain the remaining 3. The exchange included references to the customers by name, their approximate annual purchase volumes, and the geographic location of their facilities. Edgerton reviewed the proposed allocation and confirmed his agreement, with a minor adjustment regarding one account where Edgerton requested that Ridgecrest be assigned an additional customer in exchange for ceding a different account to TMC. Holt agreed to the adjustment.
This exchange is significant because it represents one of the earliest and most detailed customer-allocation discussions in the VaultChat dataset. The level of specificity — including customer names, volume estimates, and geographic locations — demonstrates that the allocation was not an abstract or aspirational discussion but a concrete, operationalized agreement regarding specific commercial relationships.
Exchange #8 — April 2018 (Holt to Edgerton and Tsang, trilateral)
This trilateral exchange involved a broader discussion of customer allocation for the upcoming contract-renewal cycle. The exchange referenced at least 15 customer accounts across all three product categories (feldspar, talc, and rare-earth concentrates). The discussion was structured around the anticipated timing of contract renewals for each customer, with the parties agreeing on which competitor would pursue the renewal and which would refrain from competing. The exchange also included discussion of certain "contested" accounts — customers that had historically purchased from multiple suppliers — and agreements on how to resolve the contested accounts going forward.
This trilateral exchange is the most comprehensive customer-allocation discussion in the recovered VaultChat dataset. Its breadth — covering 15 accounts across three product lines and involving all three competitors — suggests a high degree of coordination and mutual commitment among the parties. The DOJ may characterize this exchange as evidence of a single, overarching market-allocation conspiracy, rather than a series of discrete bilateral arrangements.
Exchange #22 — February 2020 (Holt to Tsang, bilateral)
This exchange involved a discussion of a new rare-earth concentrate customer that both TMC and Pinnacle were actively pursuing. The customer had recently entered the market and had issued solicitations to multiple suppliers. Holt and Tsang discussed the customer's requirements, the competitive dynamics of the solicitation, and their respective interest in winning the account. After a brief negotiation, the parties agreed that Pinnacle would win the account and that TMC would "step back" — i.e., withdraw from the competition or submit a non-competitive proposal. Tsang expressed appreciation for the arrangement, and the exchange included a reference to a future account that TMC would have priority to pursue.
This exchange is particularly notable because it involves a new customer — one that was not part of any pre-existing allocation arrangement — and demonstrates that the parties were actively extending their customer-allocation agreement to cover new market entrants. This supports the DOJ's theory that the alleged conspiracy was not a static, one-time arrangement but a dynamic, ongoing agreement that evolved to address new competitive opportunities as they arose.
Specific customer names referenced in these and other customer-allocation exchanges have been redacted from this memorandum to limit unnecessary exposure of competitively sensitive information. The full details, including customer names, are documented in the underlying exhibit log maintained by Redstone Digital Forensics under Bates-numbered production files and are available for review in the secure document review platform.
C. Impact Analysis
The customer-allocation exchanges have significant implications for both the legal analysis and the potential damages exposure in this matter. Customer allocation among horizontal competitors is a per se violation of Section 1 of the Sherman Act, 15 U.S.C. § 1, and is treated by the DOJ as among the most serious categories of antitrust offenses. See Palmer v. BRG of Ga., Inc., 498 U.S. 46, 49–50 (1990) (per curiam) (horizontal market-allocation agreements are per se unlawful); United States v. Topco Assocs., Inc., 405 U.S. 596, 608 (1972) (same). Unlike pricing discussions, which in some limited circumstances might be characterized as the exchange of general competitive information, customer-allocation agreements involve the deliberate division of markets and the elimination of competition for specific accounts — conduct for which there is no cognizable procompetitive justification.
The identified customer accounts span the full breadth of TMC's U.S. Specialty Minerals Division's commercial territory. To provide context on the scale of the affected commerce, TMC's U.S. Specialty Minerals Division generated approximately USD 687 million in revenue in fiscal year 2021, representing approximately 20% of TMC's consolidated revenue of approximately USD 3.38 billion. While not all of this revenue is necessarily attributable to accounts subject to allocation agreements, the breadth of the allocation discussions (covering at least 15 named accounts in the trilateral exchange alone) suggests that a significant portion of the Division's customer base was subject to some form of competitive restraint.
VII. Detailed Analysis — Category 3: Bid Coordination (7 Exchanges)
A. Nature and Pattern of Bid-Coordination Communications
The 7 bid-coordination exchanges document a pattern of collaborative manipulation of competitive bidding processes for specialty-minerals supply contracts. These exchanges related to specific requests for proposals (RFPs) or bid invitations issued by U.S. industrial and chemical-manufacturing customers and involved agreements among the participants regarding the outcome of those bidding processes.
The typical pattern observed in these exchanges proceeded as follows:
(i) Identification of Bid Opportunity. One participant would identify an upcoming bid opportunity — typically an RFP or formal bid invitation from a specific customer — and share it with the other participant(s) via VaultChat.
(ii) Designation of Winner. The participants would discuss the bid opportunity and agree on which party would submit the winning bid. In some instances, the designated winner was determined b