Birnam Oak Master Fund, LP
Birnam Oak Master Fund, LP is a hedge fund based in Grand Cayman, Cayman Islands. According to its most recent Form D, filed Sep 25, 2026, the fund has sold $75,136,005 of interests to 15 investors since its first sale in May 2021. The minimum investment it accepts from an outside investor is $1,000,000. It relies on the Section 3(c)(7) exclusion, so investors generally must be qualified purchasers. The offering uses Rule 506(b), which does not permit general solicitation. Related persons named in the filing include Birnam Oak Advisors, LP; Christopher DeLong; Erin Ross.
Performance
No verified returns have been reported for this fund. As a rough guide, Birnam Oak Advisors, LP, which manages it, disclosed U.S. stock holdings that returned an estimated +6.0% 2026 YTD through Jun 30 (S&P 500: +9.5%), based only on its public 13F filings. Over a longer period, Q1 2025 to Q2 2026, the estimate is +7.6% (S&P 500: +27.4%).
This estimate covers the firm's whole disclosed long U.S. stock portfolio. It is not this fund's return and excludes dividends, fees, shorts, derivatives, bonds, cash and trading within each quarter.
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- Total raised
- $75,136,005Cumulative sales reported on Form D
- Investors
- 15
- First sale
- May 17, 2021
- Minimum investment
- $1,000,000
- Who can invest
- Qualified purchasersSection 3(c)(7): generally $5M+ in investments
- Offering exemption
- Rule 506(b)No general advertising
- Key people and entities
- Birnam Oak Advisors, LP; Christopher DeLong; Erin Ross
- Latest Form D
- Sep 25, 2026
From SEC filings, not verified. This page republishes the fund's Form D as filed. It is not an offer, solicitation or recommendation, and AltMountain has not reviewed the fund. “Raised” is cumulative sales, not current assets or performance. Private funds are speculative, illiquid and generally limited to accredited investors or qualified purchasers. Full disclosures · Request a correction
Questions about Birnam Oak Master Fund, LP
What is the minimum investment for Birnam Oak Master Fund, LP?
According to its latest Form D, filed Sep 25, 2026, the minimum investment Birnam Oak Master Fund, LP accepts from an outside investor is $1,000,000.
Who can invest in Birnam Oak Master Fund, LP?
Birnam Oak Master Fund, LP is generally open only to qualified purchasers (generally individuals with at least $5 million in investments), because it relies on Section 3(c)(7). It uses Rule 506(b), which does not allow general advertising.
How much has Birnam Oak Master Fund, LP raised?
Birnam Oak Master Fund, LP reports $75,136,005 sold from 15 investors on its Form D filed Sep 25, 2026. This is cumulative sales since the offering began, not current assets or performance.
Where is Birnam Oak Master Fund, LP based?
Birnam Oak Master Fund, LP is based in Grand Cayman, Cayman Islands and is managed by Birnam Oak Advisors, LP.
When did Birnam Oak Master Fund, LP launch?
Birnam Oak Master Fund, LP reports its first sale in May 2021.
Size compared with every hedge fund
Raised more than 45% of the 2,363 hedge funds based in Cayman Islands, and more than 53% of all 10,308 that report sales.