AltMountain

WP Attainable Sidecar, LP

Westlake Village, CA · CIK 2142840

WP Attainable Sidecar, LP is a private equity fund based in Westlake Village, California. According to its most recent Form D, filed Aug 11, 2026, it has sold $289,050,001 of interests to 76 investors since its first sale in Jul 2026. 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 Robert Whitman; Weston Whitman.

Total raised
$289,050,001Cumulative sales reported on Form D
Investors
76
First sale
Jul 1, 2026
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
Robert Whitman; Weston Whitman
Latest Form D
Aug 11, 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. Returns are not part of SEC filings. Private funds are speculative, illiquid and generally limited to accredited investors or qualified purchasers. Full disclosures · Request a correction

Questions about WP Attainable Sidecar, LP

What is the minimum investment for WP Attainable Sidecar, LP?

WP Attainable Sidecar, LP's latest Form D, filed Aug 11, 2026, does not set a minimum investment. Managers can still require one in the offering documents.

Who can invest in WP Attainable Sidecar, LP?

WP Attainable Sidecar, 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(b), which does not allow general advertising.

How much has WP Attainable Sidecar, LP raised?

WP Attainable Sidecar, LP reports $289,050,001 sold from 76 investors on its Form D filed Aug 11, 2026. This is cumulative sales since the offering began, not current assets or performance.

Where is WP Attainable Sidecar, LP based?

WP Attainable Sidecar, LP is based in Westlake Village, California.

When did WP Attainable Sidecar, LP launch?

WP Attainable Sidecar, LP reports its first sale in Jul 2026.

Size compared with every private equity fund

Raised more than 93% of the 1,777 private equity funds based in California, and more than 85% of all 9,142 that report sales.

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