John Niederhuber

This profile gathers the share dealings of John Niederhuber across 2 companies, led by Aptevo Therapeutics Inc. and Emergent BioSolutions Inc. We count 16 filings; the first trade dates from 23 August 2010 and the latest from 6 August 2026.

Every open-market trade on record is a purchase: 1 purchase worth €576, and no sale. Buying on the open market means paying the going price with one's own funds, a different act from receiving shares as pay. The rest of the record consists of 6 share grants and 7 option exercises.

On 10 August 2026 came the latest disclosure, an option exercise in Aptevo Therapeutics Inc. The clock since the last published purchase (3 June 2022) now reads 1,619 days. Between a trade and the moment it shows up on SEC (Form 4), the median delay is 2 days. US insiders must file a Form 4 within two business days of a trade. This summary is built from SEC (Form 4) disclosures alone and does not predict where the share price will go.