Jonathan I. Lieber

Jonathan I. Lieber, listed as board member, has filed trades across 4 companies (mainly through SEC (Form 4)), most often in Altus Pharmaceuticals Inc., Rallybio Corp and Salarius Pharmaceuticals, Inc. In total, 28 filings cover trades dated from 15 November 2006 to 9 October 2026.

Both buying and selling appear: 3 purchases worth €40k, against 11 sales worth €263k. The net balance comes to €223k on the selling side. A purchase on the market is a deliberate choice to commit personal money, which is why it draws more attention than a grant. Other entries cover 2 share grants and 12 option exercises. Since January 2026: no purchases and 1 sale on the market.

In size, the median ticket on the buying side is €9,144. 2 out of 3 purchases came within 30 days of a purchase by at least one other insider of the same company. A cluster is several different insiders buying the same stock within a short window, a pattern studied more closely than a single purchase.

The latest filing, published on 13 October 2026, reports an option exercise of €21k in Rallybio Corp. The clock since the last published purchase (16 March 2023) now reads 1,318 days. Between a trade and the moment it shows up on SEC (Form 4), the median delay is 2 days. The legal deadline for a Form 4 is two business days after the transaction. A sale on its own says little: insiders also sell to pay tax, fund a purchase or diversify. Source: insider filings from SEC (Form 4). Past trades are no guide to future returns.