Contract analysis

I. Executive Summary The purpose of this memorandum is to provide a comprehensive federal, state, and local tax structuring analysis for the formation and operation of Cobalt Life Sciences Opportunities Fund I, LP ("CLSO Fund I" or the "Fund"), a Delaware limited partnership that will target Seven Hundred Fifty Million Dollars ($750,000,000) in aggregate commitments, with a hard cap of One Billion Dollars ($1,000,000

1. Minimization of UBTI Exposure for Tax-Exempt Investors. Several anticipated anchor investors are tax-exempt organizations, including state pension funds and university endowments. The Fund's structure must be designed to minimize the generation of unrelated business taxable income ("UBTI") under Internal Revenue Code ("IRC") Sections 511 through 514, which would otherwise subject these investors to federal income

2. Minimization of ECI for Non-U.S. Investors. To the extent the Fund accepts commitments from non-U.S. investors (up to 25% of commitments may originate from Western Europe and Israel), the structure must minimize the allocation of effectively connected income ("ECI") to such investors, thereby reducing their U.S. federal income tax exposure and filing obligations.

3. Compliance with IRC §1061 Carried Interest Holding Period Rules. The carried interest allocations to the Fund's principals constitute "applicable partnership interests" under Section 1061 of the Code and are therefore subject to a three-year holding period requirement for long-term capital gains treatment. The Fund's structure and partnership agreement must incorporate appropriate tracking, segregation, and report

4. Optimization of State Income Tax Nexus Posture. The Fund's management activities will be conducted primarily from California, which will assert income tax nexus over the Fund. The structure must be designed to manage and monitor state income tax exposure across multiple jurisdictions, including California, Oregon, Connecticut, Massachusetts, and other states where portfolio investments may be located.

5. Appropriate Structuring of blocker Entities. A Delaware C-corporation blocker entity should be formed on a shelf basis and activated as needed to shield certain categories of investors from adverse tax consequences, including UBTI for tax-exempt investors and ECI for non-U.S. investors.

6. Proper Tax Treatment of Management Fees, Carried Interest Allocations, and the GP Commitment. Each of these economic components of the Fund carries distinct tax implications. The structure must ensure that management fees are appropriately characterized as ordinary income, that carried interest allocations comply with Section 1061, and that the GP commitment qualifies for the capital interest exception thereunder.

II. Fund Structure Overview — Tax Perspective A. Recommended Entity Architecture The recommended entity architecture for CLSO Fund I consists of four principal entities, each serving a distinct function within the overall fund structure. The tax classification and treatment of each entity is summarized below. CLSO Fund I, LP (the "Fund"). The Fund is a Delaware limited partnership that will serve as the primary inves

III. UBTI Planning for Tax-Exempt Investors A. Overview of UBTI Risk Tax-exempt investors, including state pension funds such as Ironwood PERS and university endowments such as Northgate Endowment, are generally exempt from federal income tax on their investment income. However, under IRC §§511–514, these investors are subject to tax on "unrelated business taxable income" — income derived from a trade or business tha

1. Debt-Financed Income Under IRC §514. Income derived from "debt-financed property" — property acquired or held with the proceeds of indebtedness — is treated as UBTI to the extent of the ratio of acquisition indebtedness to the adjusted basis of the property. This rule is particularly relevant to fund-level borrowing, including subscription credit facilities.

2. Income from a Trade or Business Regularly Carried On (IRC §512(a)(1)). If the Fund invests in portfolio companies that are organized as pass-through entities (LLCs or partnerships) and those entities conduct active trades or businesses, the tax-exempt investor's allocable share of such income would constitute UBTI. This is a direct flow-through risk that arises from the Fund's partnership structure.

3. Partnership Income that Constitutes UBTI at the Partner Level. Under IRC §512(c)(1), a tax-exempt partner's share of partnership income that would constitute UBTI if received directly by the tax-exempt organization is treated as UBTI. This "look-through" rule means that the nature of the Fund's income is determined at the Fund level and then passed through to the tax-exempt partners with its UBTI character intact.

Section 512(a)(6) of the Code, enacted as part of the Tax Cuts and Jobs Act of 2017, requires that UBTI be computed separately for each "unrelated trade or business" conducted by a tax-exempt organization. Under the prior law, a tax-exempt organization could aggregate UBTI from all of its unrelated trades or businesses, allowing losses from one activity to offset income from another. The silo rule eliminates this agg

IV. ECI Planning for Non-U.S. Investors A. Effectively Connected Income Overview Non-U.S. investors in a U.S. partnership such as CLSO Fund I are subject to U.S. federal income tax on income that is "effectively connected" with the conduct of a trade or business within the United States. For non-U.S. individuals, the statutory authority is IRC §871(b); for non-U.S. corporations, it is IRC §882. ECI is taxed on a net

V. Blocker Corporation Analysis A. Purpose and Structure Cobalt Life Sciences Opportunities Fund I (Blocker), Inc. (the "Blocker Corp") is a Delaware C-corporation to be formed on a shelf basis at or around the time of the Fund's first close. The blocker Corp will not be capitalized or activated unless the final investor composition of the Fund warrants its use. The decision to activate the blocker Corp will be made

1. Shielding tax-exempt investors from UBTI. If the Fund generates UBTI — for example, through leveraged investments, investments in pass-through operating companies, or other UBTI-producing activities — a tax-exempt investor that invests through the blocker Corp would receive dividends from the blocker Corp rather than a direct allocation of UBTI. Dividends received from the blocker Corp are not UBTI (as they are ex

2. Shielding non-U.S. investors from ECI and U.S. filing obligations. A non-U.S. investor that invests through the blocker Corp would not be treated as a partner in the Fund and would not receive a K-1 or have ECI allocable to it. Instead, the non-U.S. investor would receive dividends from the blocker Corp, which are subject to withholding tax at the applicable rate (30% statutory rate, reduced by treaty). The blocke

VI. Carried Interest — IRC §1061 Compliance A. Overview of IRC §1061

Section 1061 of the Internal Revenue Code, enacted as part of the Tax Cuts and Jobs Act of 2017 and effective for taxable years beginning after December 31, 2017, modifies the tax treatment of capital gains attributable to certain partnership interests held by investment fund managers and other investment professionals. Specifically, §1061 requires a three-year holding period (rather than the standard one-year holdin