AltMountain

Substance I, LP

Berkeley, CA · CIK 2156757

Substance I, LP is a venture capital fund based in Berkeley, California. Its most recent Form D, filed Sep 25, 2026, reports no sales yet. The filing does not set a minimum investment. It relies on the Section 3(c)(1) exclusion, which limits it to 100 beneficial owners, typically accredited investors. The offering uses Rule 506(b), which does not permit general solicitation. Related persons named in the filing include Substance I GP, LLC; Soheil Sazesh; Substance Management, LLC.

Total raised
$0Cumulative sales reported on Form D
Investors
0
First sale
—
Minimum investment
None set
Who can invest
Accredited investorsSection 3(c)(1): up to 100 beneficial owners
Offering exemption
Rule 506(b)No general advertising
Key people and entities
Substance I GP, LLC; Soheil Sazesh; Substance Management, LLC
Latest Form D
Sep 25, 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 Substance I, LP

What is the minimum investment for Substance I, LP?

Substance I, LP's latest Form D, filed Sep 25, 2026, does not set a minimum investment. Managers can still require one in the offering documents.

Who can invest in Substance I, LP?

Substance 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(b), which does not allow general advertising.

How much has Substance I, LP raised?

Substance I, LP's latest Form D, filed Sep 25, 2026, reports no sales yet.

Where is Substance I, LP based?

Substance I, LP is based in Berkeley, California.

Size compared with every venture capital fund

This fund hasn't reported any sales yet.

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