Weisenborn Microstructure Fund I LP is a hedge fund based in Aguirre, Puerto Rico. According to its most recent Form D, filed Mar 12, 2026, the fund has sold $500,000 of interests to 2 investors since its first sale in Sep 2022. The minimum investment it accepts from an outside investor is $100,000. It relies on the Section 3(c)(1) exclusion, which limits it to 100 beneficial owners, typically accredited investors. The offering uses Rule 506(c), which permits general advertising to investors verified as accredited. Based on its first sale date and the amount raised, AltMountain classifies it as an emerging manager. Related persons named in the filing include Mark Weisenborn.
Performance
No verified 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
- $500,000Cumulative sales reported on Form D
- Investors
- 2
- First sale
- Sep 1, 2022
- Minimum investment
- $100,000
- Who can invest
- Accredited investorsSection 3(c)(1): up to 100 beneficial owners
- Offering exemption
- Rule 506(c)May advertise; investors must be verified as accredited
- Key people and entities
- Mark Weisenborn
- Latest Form D
- Mar 12, 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 Weisenborn Microstructure Fund I LP
What is the minimum investment for Weisenborn Microstructure Fund I LP?
According to its latest Form D, filed Mar 12, 2026, the minimum investment Weisenborn Microstructure Fund I LP accepts from an outside investor is $100,000.
Who can invest in Weisenborn Microstructure Fund I LP?
Weisenborn Microstructure Fund I 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(c), so it may advertise, but every investor must be verified as accredited.
How much has Weisenborn Microstructure Fund I LP raised?
Weisenborn Microstructure Fund I LP reports $500,000 sold from 2 investors on its Form D filed Mar 12, 2026. This is cumulative sales since the offering began, not current assets or performance.
Where is Weisenborn Microstructure Fund I LP based?
Weisenborn Microstructure Fund I LP is based in Aguirre, Puerto Rico.
When did Weisenborn Microstructure Fund I LP launch?
Weisenborn Microstructure Fund I LP reports its first sale in Sep 2022, which makes it an emerging manager by AltMountain's definition (first sale in 2021 or later and under $50 million raised).
Size compared with every hedge fund
Raised more than 21% of the 39 hedge funds based in Puerto Rico, and more than 3% of all 10,308 that report sales.