Amphenol APH Insider Ownership

Updated Oct 11, 2026

Over the trailing 12 months, APH insiders bought $1.29 million worth of shares and sold $511.92 million worth in open-market trades.

• Amphenol's open-market purchases in the past 12 months came from one insider, and its sales from 8 insiders.
• Among APH insiders, Robert Livingston (Director) bought the most stock on the open market in the past 12 months: $1.29 million, most recently on February 5, 2026.
• On the selling side, Richard Adam Norwitt (President & CEO) sold the most Amphenol stock on the open market over the past 12 months, $219.27 million, most recently on July 31, 2026.
• Amphenol's latest insider trade on the open market was a sale for $20.91 million by David M. Silverman (EVP, Human Resources) on August 5, 2026.
• According to Business Quant data, insiders at Amphenol reported 11.97Mn shares in total in their latest Form 4 filings, down 2.91% from 12.33Mn shares (split-adjusted) at the end of Q3 2025.
• Amphenol insiders hold 5.83Mn shares directly (48.71% of their total) and 6.14Mn shares (51.29%) indirectly, through entities such as trusts and partnerships.
• Holdings in Amphenol stock are reported by 13 insiders, the officers, directors and 10% owners who have filed a Form 4 in the past two years.
• Amphenol's three largest insider shareholders, based on their latest Form 4 filings, are Richard Adam Norwitt (President & CEO, 5.58Mn shares), Martin H. Loeffler (Director, 3.84Mn shares) and Luc Walter (President, Hes Division, 707.48K shares).
• Richard Adam Norwitt alone accounts for 46.63% of the shares held by Amphenol insiders.
• Institutions held 96.02% of Amphenol's outstanding shares in their Q2 2026 13F filings, insiders about 0.49% based on their latest Form 4 filings, and other investors, including the public, the remaining 3.49%.
• A total of 45 Form 4 filings with transactions in Amphenol stock were made over the past 12 months, by 16 insiders.
• These insider figures for Amphenol are based on Form 4 filings through August 6, 2026.