Research
Independent analysis of SEC filings, private funds, RIAs, websites and regulatory records.
Is Cornerstone Summit Fund Legit? SEC Form D Review of Its $500K Single-Investor Raise, Arrant Ventures Link and 2% Implied Management Fee 2026
Cornerstone Summit Fund, LLC is a newly formed Texas pooled investment vehicle with a relatively small but unusually concentrated initial capital base: its September 2026 Form D reports $500,000 sold to exactly one investor, a $50,000 minimum, an indefinite total offering and a July 31 first sale. The filing relies on
Cornerstone Summit Fund, LLC · CIK 0002154433Read article →
M.D. Sass Income Opportunity Grew From $13.5 Million to $34.97 Million as the Firm Relaunched Its Public Concentrated-Value Strategy in ETF Form
M.D. Sass Income Opportunity, L.P. is a newly formed 2025 private fund inside a manager whose regulatory history stretches back decades. Its September 18, 2026 Form D/A reports $34,965,062 sold to nine investors under an indefinite Rule 506(b) offering and Section 3(c)(7), compared with $13.5 million sold to four investors in the original September 2025 filing. M.D. Sass Income Opportunity GP, LLC is the General Partner and M.D. Sass, LLC is the investment manager, with Bobby Liu signing as Chief Legal and Risk Officer of the manager. The fund also moved with the manager from 55 West 46th Street to 885 Third Avenue during 2026, giving the latest Form D a different address from the original filing without indicating a change in manager identity. The most interesting development, however, is broader: during the same period M.D. Sass launched a registered public ETF built around its long-running concentrated-value discipline, creating a useful contrast between a nine-investor private income vehicle and a fully registered exchange-traded strategy managed by the same firm.
M.D. Sass Income Opportunity, L.P. · CIK 0002084557Read article →
Is Sanctum Storage TX 2 LP Legit? SEC Form D Review of Its $1.4M Raise, Maplequity Ownership Chain and Multi-State Self-Storage Expansion 2026
Sanctum Storage TX 2 LP is not a paper-only real-estate issuer with no identifiable operating business behind it. The September 2026 Form D can be linked to a real self-storage platform, recurring principals Mark Ameerali and Andrew Leese, a separate real-estate ownership entity called Maplequity Partners LP, operating
Sanctum Storage TX 2 LP · CIK 0002149588Read article →
TIG Arbitrage Associates Reached $145.05 Million Inside AlTi's $1.99 Billion Event-Driven Platform — SEC Review of the Master-Fund and Merger-Arbitrage Structure
TIG Arbitrage Associates L.P. is a long-running event-driven hedge-fund feeder whose current regulatory record is much richer than its $145.05 million Form D figure suggests. The September 18, 2026 amendment reports an indefinite Rule 506(b) offering, $145,049,456 sold to 47 investors, Section 3(c)(7) and a first sale dating to January 3, 2011. TFI Partners, LLC is the General Partner and TIG Advisors, LLC is expressly identified as Investment Manager. TIG Advisors is a fully SEC-registered adviser under CRD 138306 / SEC 801-65608 and now operates from AlTi Global's 22 Vanderbilt Avenue headquarters. AlTi's own 2026 annual report separately identifies TIG Arbitrage as its internally managed event-driven fund strategy, giving the manager/parent/strategy relationship unusually strong independent confirmation. The $145.05 million issuer-level Form D amount therefore represents one vehicle inside a broader master-feeder and enhanced-arbitrage platform rather than the entire TIG business. :contentReference[oaicite:0]{index=0}
TIG ARBITRAGE ASSOCIATES L.P. · CIK 0001507816Read article →
Is Bin Yuan Greater China Fund Legit? SEC Form D Review of Its $79.9M U.S. Feeder, $49.4M Cayman Fund and $888M China-Equity Platform 2026
Bin Yuan Greater China Fund has one of the strongest cross-verification trails in this research batch because the September 14, 2026 Form D amendments can be connected to a long-running master-feeder structure, a fully SEC-registered Hong Kong investment adviser, independently distributed European fund classes and iden
Bin Yuan Greater China Fund (US) LLC · CIK 0002036279Read article →
Hidden Lake Offshore Fund Reported $2.40 Million as Its Japan Master-Feeder Was Wound Up and the Manager Ran a $332 Million Options-Heavy 13F Book
Hidden Lake Offshore Fund Ltd. is the Cayman feeder in a longer-running Hidden Lake hedge-fund architecture rather than a standalone $2.4 million investment business. Its September 18, 2026 Form D/A reports an indefinite Rule 506(b) offering, $2,402,491 sold to six investors, a $100,000 minimum and a May 1, 2020 first sale. The filing identifies Hidden Lake Asset Management LP as Investment Manager and states that the manager receives customary management fees. John Morelli, Brad Cowdroy and Julie O'Hara appear as directors. The critical context comes from outside the Form D: Hidden Lake Asset Management is an SEC-registered adviser under CRD 298209 / SEC 801-115096, continues to file a large and actively changing 13F portfolio, and separately maintained domestic, offshore, master, SPV and Japan-specific vehicles. The $2.40 million offshore Form D amount therefore should not be interpreted as Hidden Lake's total strategy size.
Hidden Lake Offshore Fund Ltd. · CIK 0001750427Read article →
Is L&R Asia Credit Alpha Fund Legit? SEC Form D Review of Its Static $6.31M U.S. Raise, Cayman Master-Feeder Structure and Institutional Asia Credit Evidence 2026
L&R Asia Credit Alpha Fund is a good example of why a Form D amount should not be mistaken for total hedge-fund assets. Its September 14, 2026 amendment still reports exactly $6.31 million sold to one investor, a $5 million minimum, Rule 506(b), an indefinite offering amount and no placement-agent compensation—the same
L&R ASIA CREDIT ALPHA FUND · CIK 0001860392Read article →
ISQ Open Infrastructure Jumped From $880,000 to $339.31 Million — SEC Review of I Squared's Two-Series Private-Wealth Infrastructure Vehicle
ISQ Open Infrastructure Company LLC is materially different from a traditional I Squared flagship infrastructure fund. Its September 18, 2026 Form D/A reports $339,311,744 sold to 1,384 investors under an indefinite Rule 506(b) offering, compared with only $880,000 and 110 investors in the September 2025 amendment. The offering accepts both equity and debt securities, is intended to remain open for more than one year, and uses Morgan Stanley Smith Barney as a distribution channel with estimated cumulative sales commissions of $3.26 million. More importantly, ISQ OpenInfra is also an Exchange Act reporting company filing audited 10-Ks and quarterly 10-Qs, providing a level of portfolio, fee and related-party visibility that most private Form D issuers never disclose. The vehicle was designed as I Squared's private-wealth access channel into infrastructure, not simply another institutional closed-end fund.
ISQ Open Infrastructure Company LLC · CIK 0002059924Read article →
Is Sage Partners Onshore Fund Legit? SEC Form D Review of Its $152.75M Hedge Fund, Hong Kong Manager and Cayman Onshore-Offshore Structure 2026
Sage Partners Onshore Fund is a relatively concentrated hedge-fund vehicle with a much deeper cross-border regulatory footprint than its generic name suggests. The March 2026 Form D amendment reports $152.75 million sold to only 15 investors, implying about $10.18 million per investor if commitments were equal, with a
Sage Partners Onshore Fund · CIK 0001810361Read article →
Polpo Capital Grew From $26.86 Million to $73.85 Million While Building a Dedicated CMBS Hedge Fund Platform — SEC Review of the Onshore/Offshore Structure
Polpo Capital LP is a focused commercial mortgage-backed securities hedge fund whose SEC record shows a steady transition from a small 2021 launch into a more established institutional-style credit platform. The latest onshore Form D/A reviewed by FilingDossier, filed October 10, 2025, reports $73,851,030 sold to 112 investors under an indefinite Rule 506(b) offering, Section 3(c)(7), a $100,000 minimum and a first sale dating to November 1, 2021. Daniel John McNamara is identified as sole member of the issuer's General Partner, Polpo Capital GP LLC, while Polpo Capital Management LLC is the investment manager. The same filing identifies two fundraising channels — The Distinction Group LLC through INTE Securities LLC and Piper Sandler & Co. — and reports $159,020 of sales commissions on a cash basis. Polpo is therefore not simply a manager with a marketing website: the GP, adviser, offering history, distribution relationships and investor growth can all be reconstructed from regulatory records.
POLPO CAPITAL LP · CIK 0001943742Read article →
Is Disruptive Flagship Reservation Fund Legit? SEC Form D Review of Its Pre-First-Sale Launch, $7.7B Adviser Scale and 2023 SEC Custody-Rule Case 2026
Disruptive Flagship Reservation Fund, LP is a newly formed 2026 vehicle with no reported first sale, $0 sold and zero investors as of its September 14 Form D, yet it sits inside one of the more deeply documented private-technology investment platforms in this batch. The filing directly names Disruptive Flagship Fund GP
Disruptive Flagship Reservation Fund, LP · CIK 0002154304Read article →
Is Arlington Private Equity Fund VII Legit? SEC Form D Review of Its $104.1M Raise, Family-Office Structure and Arlington Capital Partners Name Confusion 2026
Arlington Private Equity Fund VII, LLC belongs to Arlington Partners LLC, the Birmingham, Alabama SEC-registered investment adviser and family-office platform—not Arlington Capital Partners, the Washington-area private-equity sponsor that separately raised a multibillion-dollar Fund VII. That distinction is essential b
Arlington Private Equity Fund VII · CIK 0002086131Read article →