Ioneer IONR Insider Ownership

Updated Oct 11, 2026

Across the past 12 months, open-market trades by Ioneer insiders totaled $21,600 in purchases (200K shares) and $117,917 in sales (1.07Mn shares).

• By number of insiders, Ioneer saw one insider buy and 3 insiders sell on the open market over the past 12 months.
• Among Ioneer insiders, Timothy Roy Woodall (Director) led open-market buying over the past 12 months with $21,600 of purchases (200K shares); the latest was on March 24, 2026.
• On the sell side, Chad Yeftich (VP Corporate Development & External Affairs) led open-market sales of Ioneer stock over the past 12 months with $77,746 (706.78K shares), most recently on July 2, 2026.
• Beyond open-market trades, insiders at Ioneer received 905.94K shares in stock awards in the last 12 months.
• According to Business Quant data, insiders at Ioneer reported 30.22Mn shares in total in their latest Form 4 filings.
• Ioneer insiders report no indirect holdings: all 30.22Mn shares are held directly.
• Holdings in Ioneer stock are reported by 5 insiders, the officers, directors and 10% owners who have filed a Form 4 in the past two years.
• Ioneer's three largest insider shareholders, based on their latest Form 4 filings, are Matthew Weaver (SVP of Engineering Operations, 11.3Mn shares), Yoshio Nagai (VP Comm. Sales & Marketing, 8.1Mn shares) and Chad Yeftich (VP Corporate Development & External Affairs, 6.39Mn shares).
• Of the shares held by IONR insiders, 37.39% belong to Matthew Weaver.
• Institutional investors owned 3.86% of IONR shares as of Q2 2026, per their 13F filings.
• Over the trailing 12 months, 5 insiders reported transactions in IONR stock across 8 Form 4 filings.
• These insider figures for Ioneer are based on Form 4 filings through July 7, 2026.