AltMountain

Westbourne River Event Fund

New York, NY · CIK 1554146

Westbourne River Event Fund is a hedge fund based in New York, New York. According to its most recent Form D, filed Apr 7, 2026, the fund has sold $922,741,298 of interests to 113 investors since its first sale in Jul 2010. The minimum investment it accepts from an outside investor is $100,000. 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 Bradford Willmore; Stephen Prince; Gregory Cheng.

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
$922,741,298Cumulative sales reported on Form D
Investors
113
First sale
Jul 1, 2010
Minimum investment
$100,000
Who can invest
Qualified purchasersSection 3(c)(7): generally $5M+ in investments
Offering exemption
Rule 506(b)No general advertising
Key people and entities
Bradford Willmore; Stephen Prince; Gregory Cheng
Latest Form D
Apr 7, 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 Westbourne River Event Fund

What is the minimum investment for Westbourne River Event Fund?

According to its latest Form D, filed Apr 7, 2026, the minimum investment Westbourne River Event Fund accepts from an outside investor is $100,000.

Who can invest in Westbourne River Event Fund?

Westbourne River Event Fund 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 Westbourne River Event Fund raised?

Westbourne River Event Fund reports $922,741,298 sold from 113 investors on its Form D filed Apr 7, 2026. This is cumulative sales since the offering began, not current assets or performance.

Where is Westbourne River Event Fund based?

Westbourne River Event Fund is based in New York, New York.

When did Westbourne River Event Fund launch?

Westbourne River Event Fund reports its first sale in Jul 2010.

Size compared with every hedge fund

Raised more than 87% of the 2,544 hedge funds based in New York, and more than 89% of all 10,307 that report sales.

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