Osmium Diamond, LP
Osmium Diamond, LP is a hedge fund based in San Anselmo, California. According to its most recent Form D, filed May 19, 2026, the fund has sold $29,324,259 of interests to 11 investors since its first sale in Oct 2013. The minimum investment it accepts from an outside investor is $500,000. It relies on the Section 3(c)(1) exclusion, which limits it to 100 beneficial owners, typically accredited investors. The offering uses Rule 506(b), which does not permit general solicitation. Related persons named in the filing include John Lewis.
Performance
No returns have been reported for this fund. Hedge fund returns are not part of SEC filings; managers report them to AltMountain directly.
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- Total raised
- $29,324,259Cumulative sales reported on Form D
- Investors
- 11
- First sale
- Oct 1, 2013
- Minimum investment
- $500,000
- Who can invest
- Accredited investorsSection 3(c)(1): up to 100 beneficial owners
- Offering exemption
- Rule 506(b)No general advertising
- Key people and entities
- John Lewis
- Latest Form D
- May 19, 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 Osmium Diamond, LP
What is the minimum investment for Osmium Diamond, LP?
According to its latest Form D, filed May 19, 2026, the minimum investment Osmium Diamond, LP accepts from an outside investor is $500,000.
Who can invest in Osmium Diamond, LP?
Osmium Diamond, LP is generally open only to accredited investors, and it may have no more than 100 beneficial owners because it relies on Section 3(c)(1). It uses Rule 506(b), which does not allow general advertising.
How much has Osmium Diamond, LP raised?
Osmium Diamond, LP reports $29,324,259 sold from 11 investors on its Form D filed May 19, 2026. This is cumulative sales since the offering began, not current assets or performance.
Where is Osmium Diamond, LP based?
Osmium Diamond, LP is based in San Anselmo, California and is managed by Osmium Partners, LLC.
When did Osmium Diamond, LP launch?
Osmium Diamond, LP reports its first sale in Oct 2013.
Size compared with every hedge fund
Raised more than 47% of the 1,049 hedge funds based in California, and more than 37% of all 10,129 that report sales.