AltMountain

RichBrook Offshore Segregated Portfolio B - Illiquid MBS/ABS Fund

New York, NY · CIK 1947775 · Managed by Richbrook Advisors, LP
Emerging

RichBrook Offshore Segregated Portfolio B - Illiquid MBS/ABS Fund is a hedge fund based in New York, New York. According to its most recent Form D, filed Aug 21, 2026, the fund has sold $36,000,078 of interests to 11 investors since its first sale in Sep 2022. 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. Based on its first sale date and the amount raised, AltMountain classifies it as an emerging manager. Related persons named in the filing include Vlad Kotlyarsky; RichBrook Advisors, LP; Jonathan Bain.

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
$36,000,078Cumulative sales reported on Form D
Investors
11
First sale
Sep 12, 2022
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
Vlad Kotlyarsky; RichBrook Advisors, LP; Jonathan Bain
Latest Form D
Aug 21, 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 RichBrook Offshore Segregated Portfolio B - Illiquid MBS/ABS Fund

What is the minimum investment for RichBrook Offshore Segregated Portfolio B - Illiquid MBS/ABS Fund?

RichBrook Offshore Segregated Portfolio B - Illiquid MBS/ABS Fund's latest Form D, filed Aug 21, 2026, does not set a minimum investment. Managers can still require one in the offering documents.

Who can invest in RichBrook Offshore Segregated Portfolio B - Illiquid MBS/ABS Fund?

RichBrook Offshore Segregated Portfolio B - Illiquid MBS/ABS 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 RichBrook Offshore Segregated Portfolio B - Illiquid MBS/ABS Fund raised?

RichBrook Offshore Segregated Portfolio B - Illiquid MBS/ABS Fund reports $36,000,078 sold from 11 investors on its Form D filed Aug 21, 2026. This is cumulative sales since the offering began, not current assets or performance.

Where is RichBrook Offshore Segregated Portfolio B - Illiquid MBS/ABS Fund based?

RichBrook Offshore Segregated Portfolio B - Illiquid MBS/ABS Fund is based in New York, New York and is managed by Richbrook Advisors, LP.

When did RichBrook Offshore Segregated Portfolio B - Illiquid MBS/ABS Fund launch?

RichBrook Offshore Segregated Portfolio B - Illiquid MBS/ABS Fund 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 38% of the 2,544 hedge funds based in New York, and more than 40% of all 10,308 that report sales.

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