AltMountain

400 Riverside Fund LLC

Portland, ME · CIK 2126099
Emerging

400 Riverside Fund LLC is a real estate fund based in Portland, Maine. According to its most recent Form D, filed Apr 27, 2026, it has sold $505,000 of interests to 6 investors since its first sale in Apr 2026. The filing does not set a minimum investment. 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 Green Nathaniel; Justin Schair; Christopher Marshall.

Total raised
$505,000Cumulative sales reported on Form D
Investors
6
First sale
Apr 9, 2026
Minimum investment
None set
Who can invest
Not stated
Offering exemption
Rule 506(b)No general advertising
Key people and entities
Green Nathaniel; Justin Schair; Christopher Marshall
Latest Form D
Apr 27, 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 400 Riverside Fund LLC

What is the minimum investment for 400 Riverside Fund LLC?

400 Riverside Fund LLC's latest Form D, filed Apr 27, 2026, does not set a minimum investment. Managers can still require one in the offering documents.

Who can invest in 400 Riverside Fund LLC?

400 Riverside Fund LLC is generally open only to investors who meet the eligibility rules in its offering documents. It uses Rule 506(b), which does not allow general advertising.

How much has 400 Riverside Fund LLC raised?

400 Riverside Fund LLC reports $505,000 sold from 6 investors on its Form D filed Apr 27, 2026. This is cumulative sales since the offering began, not current assets or performance.

Where is 400 Riverside Fund LLC based?

400 Riverside Fund LLC is based in Portland, Maine.

When did 400 Riverside Fund LLC launch?

400 Riverside Fund LLC reports its first sale in Apr 2026, 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 real estate fund

Raised more than 15% of the 13 real estate funds based in Maine, and more than 25% of all 7,351 that report sales.

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