INDEPENDENT VERDICT
Portion Oil & Gas Investor Holdings II, L.P. is a clean example of a repeat sponsor launching a new energy private-equity vehicle after fully completing an earlier raise. The September 10, 2026 Form D reports an indefinite Rule 506(b) offering, $0 sold, zero investors and no first sale yet. The Delaware partnership relies on Section 3(c)(7), offers equity and pooled-investment-fund interests, and names PC Oil and Gas Fund Holdings II GP LLC as General Partner. James Crain is identified as President of the General Partner, Portion Capital Management LLC as investment adviser to the issuer, and Nathan Watkin as Managing Director of the General Partner. The filing is therefore unusually clear about the control chain even though no outside capital had yet been reported. The strongest context comes from the prior Portion Oil & Gas Investor Holdings, L.P., which used the same Dallas address, same telephone number, same adviser and the same Crain/Watkin management structure and fully sold a $20.2 million offering to 44 investors in August 2024.
THE UNIQUE STORY IS THE COMPLETE RESET FROM A FULLY SUBSCRIBED 2024 VEHICLE TO A NEW $0-SOLD 2026 VINTAGE
The predecessor fund did not remain open indefinitely. Its August 2024 Form D reported a fixed $20.2 million offering and exactly $20.2 million sold, leaving $0 remaining, with 44 investors and an August 8 first sale. The 2026 vehicle uses a new CIK, a new General Partner entity carrying the "II" designation and an indefinite offering amount, but retains the same Dallas operating address, Portion Capital Management adviser and senior people. That combination strongly supports a second-vintage structure rather than a simple amendment or renaming of the original fund. It also means the first fund's $20.2 million should not be rolled into Fund II's future fundraising total. The original vehicle is a completed capital-formation event; the new vehicle began at $0 and should be tracked independently as subscriptions appear.
THE MANAGER CONNECTION IS STRONGER THAN A SIMPLE NAME MATCH
The new Form D expressly identifies Portion Capital Management, LLC as "Investment Advisor to the Issuer," while James Crain and Nathan Watkin are both named in controlling roles. The 2024 predecessor contained the same adviser designation and the same address at 6125 Luther Lane #281 in Dallas. Portion Capital's official website separately lists "Portion Oil & Gas" among its investments and states that the broader Portion platform has raised more than $100 million of equity across its investments. That firm-level figure should not be interpreted as Oil & Gas Fund II AUM, but it confirms that Portion Oil & Gas is part of the sponsor's own disclosed investment platform rather than an unrelated issuer that merely shares a name.
JAMES CRAIN'S PUBLIC ENERGY HISTORY IS MATERIAL TO THE MANAGER STORY
Public-company SEC filings provide unusually long historical evidence for James Crain. Earlier filings describe him as having spent decades in the energy industry as both an attorney and executive, including serving as president of Marsh Operating Company, an investment-management business focused on energy, and as general partner of Valmora Partners, a private investment partnership with oil and gas exposure. Historical filings also identify board roles involving Crosstex, GeoMet and other energy companies. That record predates Portion Capital and does not establish the exact assets held by the new fund, but it does show that the named Fund II principal has a documented energy-investment background extending well beyond the current Form D.
THE BIGGEST MISSING PIECE IS THE ACTUAL UNDERLYING OIL AND GAS ASSET STRATEGY
Despite the fund name, Form D classifies Portion Oil & Gas II as a Private Equity Fund under the pooled-investment-fund category rather than checking the standalone Oil & Gas industry box. The filing does not identify producing wells, mineral interests, royalties, non-operated working interests, drilling partnerships, basins, operators or portfolio companies. It also does not disclose whether the vehicle will acquire direct oil-and-gas assets or invest in an operating company. That gap matters because energy private-equity economics differ radically depending on asset type: mineral and royalty interests have different capital needs and decline exposure from operated drilling assets; non-operated interests depend heavily on third-party operator decisions; and company-level equity adds management and balance-sheet risk. The predecessor's successful $20.2 million close establishes sponsor fundraising history, but it does not reveal what Fund II will own.
FINAL ASSESSMENT
Portion Oil & Gas Investor Holdings II has a specific research story built around continuity and reset. Five facts distinguish it: the new fund had $0 sold at its September filing; the predecessor had fully sold a fixed $20.2 million offering to 44 investors; both vehicles use the same Dallas address and telephone number; both identify Portion Capital Management as adviser and James Crain / Nathan Watkin in senior control roles; and Portion Capital publicly lists Portion Oil & Gas as one of its investments. The key diligence question is now asset-level rather than identity-level. Before Fund II accepts capital, investors should establish whether it is acquiring producing assets, mineral interests, royalties, non-operated working interests or corporate equity; whether the strategy differs from the first fund; and whether any predecessor assets, operators or service providers are being reused.
SEC SNAPSHOT
Issuer: Portion Oil & Gas Investor Holdings II, L.P. CIK: 0002154259 SEC Form: Form D Accession No.: 0002154259-26-000001 Filing Date: September 10, 2026 Year Organized: 2026 Jurisdiction: Delaware Principal Address: 6125 Luther Lane, #281, Dallas, TX 75225 Telephone: 214-450-1262 Industry: Pooled Investment Fund Fund Classification: Private Equity Fund Investment Company Registered: No Investment Company Act Exclusion: Section 3(c)(7) Offering Exemption: Rule 506(b) Security Types: Equity / Pooled Investment Fund Interests Offering Amount: Indefinite Amount Sold: $0 Remaining: Indefinite Investors: 0 Minimum Investment: $0 First Sale: Yet to occur Offering Duration Over One Year: No Business Combination Transaction: No Sales Commissions: $0 Finder's Fees: $0 Related-Person Payments: $0 General Partner: PC Oil and Gas Fund Holdings II GP LLC Investment Adviser: Portion Capital Management, LLC Related Person: James Crain Role: President of General Partner Related Person: Nathan Watkin Role: Managing Director of General Partner Signer: James Crain Signer Title: Managing Director of the General Partner
PREDECESSOR FUND PENETRATION
Predecessor: Portion Oil & Gas Investor Holdings, L.P. Predecessor CIK: 0002032617 Formation Year: 2024 SEC Filing Date: August 15, 2024 First Sale: August 8, 2024 Offering Amount: $20,200,000 Amount Sold: $20,200,000 Remaining To Be Sold: $0 Offering Sold Percentage: 100% Investors: 44 Minimum Investment: $0 Offering Exemption: Rule 506(b) Investment Company Act Exclusion: Section 3(c)(7) Fund Classification: Private Equity Fund Investment Adviser: Portion Capital Management, LLC General Partner: PC Oil and Gas Fund Holdings GP LLC Related Person: James Crain Related Person: Nathan Watkins Address: 6125 Luther Lane, #281, Dallas, TX 75225 Telephone: 214-450-1262
Predecessor and Fund II Same Legal Entity: NO Predecessor CIK Reused: NO New GP Entity Created for Fund II: YES Same Adviser: YES Same Address: YES Same Telephone: YES Same Core Management: YES Predecessor Capital Automatically Part of Fund II: NO
MANAGER / BRAND PENETRATION
Official Brand: Portion Capital Official Website: portioncapital.com Portion Oil & Gas Listed by Sponsor as Investment: YES Portion Platform Reports More Than $100M Equity Raised: YES That $100M+ Equal to Fund II Size: NO Portion Capital Management Named in SEC Filing as Investment Adviser: YES Dedicated Adviser CRD Independently Confirmed: NO Dedicated SEC 801 Number Independently Confirmed: NO
JAMES CRAIN ENERGY HISTORY
James Crain Portion Fund II Role Confirmed: YES James Crain Predecessor Fund Role Confirmed: YES Historical Energy Industry Experience Documented in SEC Public-Company Filings: YES Former President, Marsh Operating Company: YES Marsh Described Historically as Energy-Focused Investment Management Company: YES Historical General Partner Role at Valmora Partners: YES Valmora Historically Invested in Oil and Gas Among Other Areas: YES Historical Crosstex Board Relationship: YES Historical GeoMet Board Relationship: YES Historical Energy Experience Proves Fund II Portfolio: NO
WEBSITE / ENTITY PENETRATION
Fund II SEC issuer confirmed: YES Predecessor SEC issuer confirmed: YES Official Portion Capital website confirmed: YES Portion Oil & Gas sponsor relationship confirmed on Portion website: YES Portion Capital Management adviser role confirmed directly in Form D: YES PC Oil and Gas Fund Holdings II GP LLC relationship confirmed: YES James Crain relationship confirmed: YES Nathan Watkin relationship confirmed: YES Exact Fund II asset portfolio publicly confirmed: NO Producing-property portfolio identified: NO Mineral / royalty portfolio identified: NO Non-operated working-interest portfolio identified: NO Operating-company investments identified: NO Primary basin identified: NO Third-party operator identified: NO Reserve report identified: NO Engineering report identified: NO Fund auditor identified: NO Administrator identified: NO Custodian identified: NO
CORE INVESTOR QUESTIONS
What specific oil and gas assets will Fund II acquire Will the fund own producing properties directly or invest through operating companies Does the strategy include mineral or royalty interests Does it include non-operated working interests Which basins are targeted Will Fund II reuse operators or assets related to the first Portion Oil & Gas vehicle What investments were made by the $20.2 million predecessor fund Have any predecessor assets already been realized What was the predecessor fund's realized and unrealized performance Why is Fund II offering size indefinite while Fund I had a fixed $20.2 million target What is the intended Fund II target or hard cap What management fee applies What carried interest applies What GP commitment will Portion make How will acquisition opportunities be allocated between the first and second vehicles Will any assets be transferred from Fund I to Fund II How are oil and gas reserves independently evaluated What commodity-price deck is used in underwriting What hedging policy applies How much leverage may be used Who serves as administrator, auditor and custodian
PRIMARY EVIDENCE REVIEWED
SEC Form D for Portion Oil & Gas Investor Holdings II, L.P. filed September 10, 2026. SEC Form D for Portion Oil & Gas Investor Holdings, L.P. filed August 15, 2024. SEC records confirming Portion Capital Management, LLC as investment adviser to both issuers. SEC records confirming the shared Dallas address and James Crain / Nathan Watkin management continuity. Portion Capital official website listing Portion Oil & Gas among its investments and reporting more than $100 million of equity raised across the broader platform. Historical SEC public-company filings documenting James Crain's long-running energy investment and executive background.
IMPORTANT FORM D NOTICE
Portion Oil & Gas Investor Holdings II, L.P.'s September 2026 Form D reports $0 sold, zero investors and no first sale. The predecessor vehicle's fully subscribed $20.2 million offering is a separate 2024 fund and should not be added to Fund II or treated as current Fund II AUM. Portion Capital's broader statement of more than $100 million of equity raised is a sponsor-level statistic across investments and is not the size of this vehicle. Form D, CIK and Section 3(c)(7) records confirm regulatory filings and legal structure; they do not constitute SEC approval or endorsement of Portion Capital, the fund or any oil and gas investment.