Jakob Haldor Topsoe

Jakob Haldor Topsoe, listed as board member, appears in our data through filings on IGM Biosciences, Inc. shares, published by SEC (Form 4). Over a trading history stretching from 18 September 2019 to 14 August 2025, the count stands at 31 filings.

Every open-market trade on record is a purchase: 10 purchases worth €27.4M, and no sale. Unlike grants, an open-market purchase is paid for by the insider, at the market price. The rest of the record consists of 19 share grants.

The median purchase comes to €94k. Of 10 purchases, 10 formed part of a group of insiders buying within 30 days of each other. Such overlaps are known as a cluster signal: distinct people reaching the same decision at about the same time.

The latest filing, published on 14 August 2025, reports a transaction in IGM Biosciences, Inc. The most recent open-market purchase was published on 3 July 2023, 1,206 days ago. Filings reach the SEC (Form 4) feed a median of 4 days after the trade. US insiders must file a Form 4 within two business days of a trade. These figures are compiled from regulatory filings published by SEC (Form 4). They describe what insiders did and are not a recommendation.