William E. Siwek

William E. Siwek, listed as chief executive, appears in our data through filings on TPI Composites, Inc shares, published by SEC (Form 4). We count 15 filings; the first trade dates from 14 May 2021 and the latest from 21 March 2025.

Every open-market trade on record is a purchase: 3 purchases worth €83k, and no sale. Open-market purchases are the filings investors watch most closely, because the insider pays for the shares out of pocket. Outside the open market, there are 1 share grant and 11 option exercises.

A typical purchase (the median) is worth €21k. 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 record was last updated on 25 March 2025 with an option exercise in TPI Composites, Inc. The latest purchase dates back some time: it was published 703 days ago, on 14 November 2024. Typically, a trade is published a median of 2 days after it takes place. The legal deadline for a Form 4 is two business days after the transaction. Every figure here comes from the filings published by SEC (Form 4) and describes the past, not future prices; it is not investment advice.