Contract analysis

I. Executive Summary Calderwood & Harkness LLP was retained on March 2, 2026, by Quorum Insurance Holdings Corp. ("QIH") and its principal insurance subsidiary, Quorum Casualty & Surety Company ("QC&S"), to assess and defend against the pre-suit demand of Pinnacle Atlantic Reinsurance Ltd. ("Pinnacle Atlantic" or "PARL"). This memorandum provides our initial case assessment, including a detailed analysis of the four

1. Late Notice (Ground 1): Alleged untimely notice of the Meridian Docks mass tort claims under Treaty Article 7.

2. IBNR Misallocation (Ground 2): Alleged improper allocation of $22,300,000 in IBNR reserve development to Treaty Year 2022 under Treaty Article 5.

3. Follow-the-Fortunes Challenge (Ground 3): Alleged bad-faith settlement of the Veridian Financial Services E&O cluster, purportedly in violation of Treaty Article 11.

4. Premium Underreporting (Ground 4): Alleged underreporting of $6,800,000 in ceded earned premium under Treaty Article 3. Overall Assessment. Based on our preliminary review of the demand letter, the Treaty, and information provided by QC&S to date, it is our assessment that QC&S has strong defenses on Grounds 1, 3, and 4, and a moderate risk on Ground 2 (IBNR allocation). The exposure range spans from $0 (best case

II. Background A. The Parties Quorum Insurance Holdings Corp. ("QIH"). QIH is a Delaware corporation, publicly traded on the Nasdaq Global Select Market under the ticker symbol QIHC, and headquartered at 200 Constitution Plaza, Suite 3400, Hartford, Connecticut 06103. QIH operates as a multi-line insurance holding company with a technology-enabled distribution platform marketed under the brand name "QuorumEdge." For

III. Analysis of Pinnacle Atlantic's Four Grounds This section provides a detailed analysis of each of the four grounds asserted in Pinnacle Atlantic's pre-suit demand. For each ground, we set forth the factual background, Pinnacle Atlantic's position as articulated in the HFC demand letter, QC&S's available defenses, and our preliminary merits assessment. We note at the outset that our analysis is based on informati

1. Factual Background The Meridian Docks claims comprise thirty-one (31) related commercial general liability bodily injury claims arising from alleged toxic contamination at the Meridian Docks industrial waterfront redevelopment project in Newark, New Jersey. The claims allege that construction workers, site visitors, and neighboring residents were exposed to hazardous substances — including volatile organic compoun

2. Pinnacle Atlantic's Position Pinnacle Atlantic contends that Article 7 of the Treaty requires "prompt notice" of claims that "may materially impact the cession" and that a delay of fourteen months and seven days from initial reservation to formal notice is per se unreasonable and constitutes a material breach of the Treaty. Pinnacle Atlantic's demand letter characterizes this delay as "fundamentally inconsistent w

3. QC&S's Defense We believe QC&S has strong defenses against the late notice ground, on multiple independent bases: Treaty Threshold. Article 7 of the Treaty contains an individual claim reporting threshold of $1,000,000 per claim. The thirty-one Meridian Docks claims were initially reserved individually at amounts well below this threshold. It was not until the first quarter of 2022, as the claims matured and addit

4. Merits Assessment This is a strong defense for QC&S. The threshold-based notice argument is well-supported by the plain text of Article 7. New York's prejudice requirement for reinsurance late notice creates a significant additional layer of protection, and the aggregate excess-of-loss structure of the Treaty makes it particularly difficult for Pinnacle Atlantic to demonstrate actual prejudice from delayed individ

1. Factual Background Pinnacle Atlantic's second ground concerns the allocation of $22,300,000 in IBNR (incurred but not reported) reserve strengthening to Treaty Year 2022. Pinnacle Atlantic contends that this amount should properly have been attributed to Treaty Year 2021. The significance of this alleged misallocation is driven by the differing aggregate loss positions in TY 2021 and TY 2022: • TY 2021. QC&S's agg

2. Pinnacle Atlantic's Position Pinnacle Atlantic's demand letter contends that the $22,300,000 in IBNR development relates to underlying accident-year 2021 exposures — that is, to claims arising from insured events occurring during the period that falls within TY 2021 — and should therefore be attributed to TY 2021 for purposes of the Treaty cession calculation. The demand letter asserts that QC&S's allocation of th

3. QC&S's Defense We believe QC&S has a defensible position on this ground, but it is the area of greatest factual and technical uncertainty, and the most likely ground on which Pinnacle Atlantic may achieve some degree of success. Treaty Language. Article 5.2 of the Treaty defines "losses incurred" and prescribes the methodology for allocating losses, including IBNR, to treaty years. The precise text of Article 5.2

4. Merits Assessment This ground presents MODERATE risk and is the most technically complex issue in the dispute. The outcome will depend heavily on the actuarial evidence — specifically, whether the IBNR development factors are more properly attributed to accident-year 2021 or accident-year 2022 under the Treaty's definition of "losses incurred" as set forth in Article 5.2, and whether Velthorn's methodology is cons

1. Factual Background Pinnacle Atlantic's third ground challenges the settlement of three related errors & omissions / professional liability claims brought by investors against Veridian Financial Services Inc., a QC&S policyholder. The claims alleged that Veridian made material misrepresentations in the sale of structured financial products, including collateralized loan obligations and structured notes, resulting i

2. Pinnacle Atlantic's Position Pinnacle Atlantic's demand letter alleges that QC&S settled the Veridian claims "without meaningful litigation exposure analysis, at inflated amounts, in order to artificially push aggregate losses above the $120,000,000 retention in Treaty Year 2023." The letter characterizes the settlement as lacking "good faith and businesslike conduct" and asserts that the settlement "vitiates Pinn

3. QC&S's Defense We believe QC&S has strong defenses on this ground, grounded in both the settled law of reinsurance and the specific facts of the Veridian settlement. Follow-the-Fortunes Doctrine. Under New York law, the follow-the-fortunes doctrine is a foundational principle of reinsurance. It requires the reinsurer to follow the cedent's good-faith claims decisions — including settlement decisions — unless the c

4. Merits Assessment This is a strong defense for QC&S. The follow-the-fortunes doctrine is well-established under New York law and strongly favors cedents. Pinnacle Atlantic's allegation of settlement inflation is speculative and would require affirmative evidence of bad faith — a very difficult standard to meet, particularly where the cedent retained a substantial economic interest in the outcome. QC&S's significan

1. Factual Background Pinnacle Atlantic's fourth and final ground involves a dispute over the calculation of ceded earned premium for TY 2022. QC&S reported ceded earned premium of $38,400,000 for TY 2022. Pinnacle Atlantic calculates ceded earned premium at $45,200,000, a difference of $6,800,000. At the provisional treaty premium rate of forty-two percent (42%), the alleged shortfall results in a treaty premium und

2. Pinnacle Atlantic's Position Pinnacle Atlantic's demand letter asserts that QC&S "materially underreported ceded earned premium by $6,800,000," and characterizes this underreporting as part of a broader "pattern of treaty non-compliance" that, in combination with the other three grounds, entitles Pinnacle Atlantic to a treaty termination right or, at minimum, an offset against the ceded losses. The demand letter a

3. QC&S's Defense We believe QC&S has a strong defense on this ground, as the premium discrepancy appears to be entirely attributable to a difference in treaty interpretation regarding the inclusion of certain premium categories.

Article 3.4 Exclusion. Based on our preliminary discussions with Tobias Engstrom, the $6,800,000 difference arises from Pinnacle Atlantic's improper inclusion of run-off portfolio transfer premiums that are expressly excluded from the definition of "ceded earned premium" under Article 3.4 of the Treaty. Run-off portfolio transfer premiums relate to blocks of business that QC&S acquired through assumption reinsurance

4. Merits Assessment This is a strong defense for QC&S. The Article 3.4 exclusion appears to directly address the premium discrepancy, and Pinnacle Atlantic's own calculation appears to include premium categories that the Treaty expressly excludes. Even if QC&S were incorrect on the premium calculation — a possibility we consider unlikely — the remedy would be limited to a premium true-up of approximately $2,856,000,

IV. Aggregate Exposure Analysis A. Exposure Range Based on our analysis of the four grounds set forth in Section III, we present the following exposure range: We assess the likelihood distribution as follows: the best case is achievable but depends on the strength of the actuarial evidence on Ground 2; the likely case reflects what we believe is the most probable range of outcomes in arbitration, acknowledging the fa

V. Forum and Dispute Resolution Analysis A. Arbitration Under Treaty Article 22 Treaty Article 22 provides for the resolution of disputes through binding arbitration before a three-member arbitration panel sitting in New York, New York, under ARIAS-U.S. Rules. Based on our preliminary review, the scope of the arbitration clause appears to be broad, covering disputes "arising under or in connection with" the Treaty. T

VI. Defenses and Affirmative Claims A. Affirmative Defenses Based on our analysis, QC&S should assert the following affirmative defenses in response to Pinnacle Atlantic's demand, whether in the context of arbitration proceedings or, if necessary, in responsive pleadings in litigation:

1. Full Compliance with Treaty Terms. QC&S has at all times complied with the terms and conditions of the Treaty, including Articles 3, 5, 7, and 11, and is entitled to retain the full $78,400,000 in reinsurance recoverables.

2. Timely Notice Under Article 7. QC&S provided timely notice of the Meridian Docks claims in accordance with Article 7's individual claim reporting threshold of $1,000,000 per claim. The claims were individually reserved below the threshold until Q1 2022, at which time reserve increases triggered the notice obligation. Notice was provided promptly on May 22, 2022.

3. Proper IBNR Allocation Under Article 5.2. QC&S's allocation of IBNR reserve development to Treaty Year 2022 was proper under Article 5.2, consistent with actuarial standards of practice, and certified by Velthorn Actuarial Advisors LLC through Dr. Stephen Tanaka, FCAS, MAAA. The allocation is entitled to deference as an exercise of reasonable actuarial judgment.

4. Follow-the-Fortunes Doctrine. QC&S's settlement of the Veridian Financial Services E&O claims was made in good faith, in the ordinary course of business, and within the reasonable range of litigation exposure. Pinnacle Atlantic is obligated to follow QC&S's fortunes under Article 11 and New York reinsurance law. Pinnacle Atlantic cannot demonstrate bad faith, fraud, or gross negligence in QC&S's claims handling or

5. Proper Premium Reporting Under Article 3. QC&S properly reported ceded earned premium of $38,400,000 for TY 2022, correctly excluding run-off portfolio transfer premiums pursuant to Article 3.4 of the Treaty. Pinnacle Atlantic's calculation of $45,200,000 improperly includes excluded premium categories.

6. Waiver and/or Estoppel. Pinnacle Atlantic paid all seven billing installments totaling $78,400,000 between