Stephen W. Webster

Stephen W. Webster, listed as board member, has filed trades across 6 companies (mainly through SEC (Form 4)), most often in Spark Therapeutics, Inc., Adolor Corp and Nabriva Therapeutics plc. The record holds 44 filings, for trades running from 15 December 2009 to 4 April 2025.

On the open market, the record shows 4 purchases worth €131k and 11 sales worth €4.1M. On balance, insiders were net sellers of €4.0M. Open-market purchases are the filings investors watch most closely, because the insider pays for the shares out of pocket. Other entries cover 9 share grants and 15 option exercises.

A typical purchase (the median) is worth €34k.

Most recently, on 8 April 2025, the filings show a transaction in Gritstone bio, Inc. The clock since the last published purchase (31 May 2018) now reads 3,068 days. Typically, a trade is published a median of 2 days after it takes place. US insiders must file a Form 4 within two business days of a trade. Selling is not necessarily a view on the stock: liquidity needs and diversification are common motives. Source: insider filings from SEC (Form 4). Past trades are no guide to future returns.