David H. Naemura

Filings by David H. Naemura span 3 companies, the busiest being Neogen Corp, Vontier Corp and DIEBOLD NIXDORF, Inc. The record holds 17 filings, for trades running from 15 December 2021 to 1 December 2025.

The open-market record is one-sided, with 4 purchases worth €625k and not one sale. A purchase on the market is a deliberate choice to commit personal money, which is why it draws more attention than a grant. The rest of the record consists of 8 share grants and 5 option exercises. 2025 to date brings 1 purchase and no sales.

A typical purchase (the median) is worth €153k. 2 out of 4 purchases came within 30 days of a purchase by at least one other insider of the same company. Such overlaps are known as a cluster signal: distinct people reaching the same decision at about the same time.

On 2 December 2025 came the latest disclosure, an option exercise for €67k in Neogen Corp. The last insider purchase was made public on 16 January 2025, 640 days ago. Between a trade and the moment it shows up on SEC (Form 4), the median delay is 3 days. US insiders must file a Form 4 within two business days of a trade. Source: insider filings from SEC (Form 4). Past trades are no guide to future returns.