Nathan B. Fountain

Nathan B. Fountain, listed as board member, appears in our data through filings on Acumen Pharmaceuticals, Inc. shares, published by SEC (Form 4). The record holds 4 filings, for trades running from 6 July 2021 to 9 June 2026.

In open-market terms, that means 1 purchase worth €85k on one side and 1 sale on the other. The amount is not disclosed for 1 filing. Open-market purchases are the filings investors watch most closely, because the insider pays for the shares out of pocket. Besides market trades, the filings include 2 share grants. So far in 2026, the count stands at no purchases and 1 sale.

Most recently, on 10 June 2026, the filings show an open-market sale in Acumen Pharmaceuticals, Inc. The most recent open-market purchase was published on 8 July 2021, 1,928 days ago. Between a trade and the moment it shows up on SEC (Form 4), the median delay is 2 days. Section 16 rules allow two business days to file each Form 4. These figures are compiled from regulatory filings published by SEC (Form 4). They describe what insiders did and are not a recommendation.