Diameter Onshore Fund LP is a hedge fund based in New York, New York. According to its most recent Form D, filed Nov 14, 2025, the fund has sold $2,131,696,387 of interests to 269 investors since its first sale in Sep 2017. The filing does not set a minimum investment. 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 Diameter Capital Partners LP; Jonathan Lewinsohn; Diameter Associates LLC.
Performance
No verified returns have been reported for this fund. Hedge fund returns are not part of SEC filings; managers report them to HedgeMountain directly.
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- Total raised
- $2,131,696,387Cumulative sales reported on Form D
- Investors
- 269
- First sale
- Sep 1, 2017
- Minimum investment
- None set
- Who can invest
- Qualified purchasersSection 3(c)(7): generally $5M+ in investments
- Offering exemption
- Rule 506(b)No general advertising
- Key people and entities
- Diameter Capital Partners LP; Jonathan Lewinsohn; Diameter Associates LLC
- Latest Form D
- Nov 14, 2025
From SEC filings, not verified. This page republishes the fund's Form D as filed. It is not an offer, solicitation or recommendation, and HedgeMountain 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
Size compared with every hedge fund
Raised more than 95% of the 2,479 hedge funds based in New York, and more than 95% of all 10,157 that report sales.