AltMountain

Cambrian Partners LP

New York, NY · CIK 1140575 · Managed by Atlantic Investment Management, Inc
506(c)

Cambrian Partners LP is a hedge fund based in New York, New York. According to its most recent Form D, filed Jul 15, 2026, the fund has sold $238,329,589 of interests to 154 investors since its first sale in Oct 1996. The minimum investment it accepts from an outside investor is $250,000. It relies on the Section 3(c)(7) exclusion, so investors generally must be qualified purchasers. The offering uses Rule 506(c), which permits general advertising to investors verified as accredited. Related persons named in the filing include Alexander Roepers; Alexander J. Roepers, LLC; Atlantic Investment Management, Inc.

Performance

13F estimate · public data only

No verified returns have been reported for this fund. As a rough guide, Atlantic Investment Management, Inc, which manages it, disclosed U.S. stock holdings that returned an estimated +0.7% 2026 YTD through Jun 30 (S&P 500: +9.5%), based only on its public 13F filings. Over a longer period, Q3 2024 to Q2 2026, the estimate is +12.8% (S&P 500: +37.2%).

This estimate covers the firm's whole disclosed long U.S. stock portfolio. It is not this fund's return and excludes dividends, fees, shorts, derivatives, bonds, cash and trading within each quarter.

Is this your fund? Report your monthly returns · How performance works

Total raised
$238,329,589Cumulative sales reported on Form D
Investors
154
First sale
Oct 1, 1996
Minimum investment
$250,000
Who can invest
Qualified purchasersSection 3(c)(7): generally $5M+ in investments
Offering exemption
Rule 506(c)May advertise; investors must be verified as accredited
Key people and entities
Alexander Roepers; Alexander J. Roepers, LLC; Atlantic Investment Management, Inc
Latest Form D
Jul 15, 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 Cambrian Partners LP

What is the minimum investment for Cambrian Partners LP?

According to its latest Form D, filed Jul 15, 2026, the minimum investment Cambrian Partners LP accepts from an outside investor is $250,000.

Who can invest in Cambrian Partners LP?

Cambrian Partners LP 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(c), so it may advertise, but every investor must be verified as accredited.

How much has Cambrian Partners LP raised?

Cambrian Partners LP reports $238,329,589 sold from 154 investors on its Form D filed Jul 15, 2026. This is cumulative sales since the offering began, not current assets or performance.

Where is Cambrian Partners LP based?

Cambrian Partners LP is based in New York, New York and is managed by Atlantic Investment Management, Inc.

When did Cambrian Partners LP launch?

Cambrian Partners LP reports its first sale in Oct 1996.

Size compared with every hedge fund

Raised more than 69% of the 2,544 hedge funds based in New York, and more than 72% of all 10,308 that report sales.

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