As of September 29, 2026, Ameren's top three insider holders are Martin J Lyons (Chairman, President Ceo, 282.68K shares), Warner L Baxter (Executive Chairman, 207.27K shares), Michael L Moehn (Group President, Utilities, 199.69K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Martin J Lyons | Chairman, President Ceo | 282,681 | 0 | 282,681 | 16.0% | 03 Mar, 2026 |
| 2 | Warner L Baxter | Executive Chairman | 207,272 | 0 | 207,272 | 11.7% | 02 Mar, 2023 |
| 3 | Michael L Moehn | Group President, Utilities | 199,689 | 0 | 199,689 | 11.3% | 05 Aug, 2026 |
| 4 | Richard J Mark | Senior Vp Of Subsidiary | 144,165 | 0 | 144,165 | 8.2% | 04 Apr, 2022 |
| 5 | Mark C Birk | Other | 108,339 | 0 | 108,339 | 6.1% | 04 Mar, 2025 |
| 6 | Mary P Heger | Other | 74,457 | 0 | 74,457 | 4.2% | 02 Mar, 2022 |
| 7 | Fadi M Diya | Other | 65,799 | 0 | 65,799 | 3.7% | 04 Mar, 2025 |
| 8 | James C Johnson | Director | 60,196 | 0 | 60,196 | 3.4% | 07 Jan, 2025 |
| 9 | Shawn E Schukar | Other | 56,830 | 0 | 56,830 | 3.2% | 03 Mar, 2026 |
| 10 | Ellen M Fitzsimmons | Director | 53,026 | 0 | 53,026 | 3.0% | 07 Jan, 2026 |
| 11 | Mark C Lindgren | Other | 44,983 | 0 | 44,983 | 2.5% | 03 Mar, 2026 |
| 12 | Chonda J Nwamu | Executive Vice President | 43,344 | 0 | 43,344 | 2.5% | 04 Mar, 2025 |
| 13 | Bhavani Amirthalingam | Svp Cdio Of Subsidiary | 39,622 | 0 | 39,622 | 2.2% | 04 Mar, 2024 |
| 14 | Steven H Lipstein | Director | 37,862 | 0 | 37,862 | 2.1% | 07 Jan, 2026 |
| 15 | Leonard P Singh | Other | 32,776 | 0 | 32,776 | 1.9% | 03 Mar, 2026 |
| 16 | Theresa A Shaw | Svp And Cato | 32,340 | 0 | 32,340 | 1.8% | 17 Aug, 2026 |
| 17 | Catherine S Brune | Director | 26,628 | 0 | 26,628 | 1.5% | 06 Mar, 2026 |
| 18 | Ryan J Martin | Svp Finance | 25,595 | 0 | 25,595 | 1.4% | 20 Aug, 2026 |
| 19 | J Edward Coleman | Director | 23,252 | 0 | 23,252 | 1.3% | 05 Jan, 2024 |
| 20 | Ajay K Arora | Evp Of Subsidiary | 23,119 | 0 | 23,119 | 1.3% | 06 Jul, 2026 |
| 21 | Richard J Harshman | Director | 22,135 | 0 | 22,135 | 1.3% | 07 Jan, 2026 |
| 22 | Patrick E Smith | Chairman President Of Sub | 20,275 | 0 | 20,275 | 1.1% | 06 Jul, 2026 |
| 23 | Ward H. Dickson | Director | 18,946 | 0 | 18,946 | 1.1% | 07 Jan, 2026 |
| 24 | Noelle K Eder | Director | 16,609 | 0 | 16,609 | 0.9% | 07 Jan, 2025 |
| 25 | Craig S Ivey | Director | 16,597 | 0 | 16,597 | 0.9% | 07 Jan, 2026 |
| 26 | Eric V Seidler | Svp Of Subsidiary | 14,041 | 0 | 14,041 | 0.8% | 03 Mar, 2026 |
| 27 | Rafael Flores | Director | 13,888 | 0 | 13,888 | 0.8% | 14 Sep, 2026 |
| 28 | Cynthia J Brinkley | Director | 13,494 | 0 | 13,494 | 0.8% | 07 Jan, 2026 |
| 29 | Leo S. Jr. Mackay | Director | 11,834 | 0 | 11,834 | 0.7% | 07 Jan, 2026 |
| 30 | David Matthew Feinberg | Evp, Gc Secretary | 8,260 | 0 | 8,260 | 0.5% | 09 Feb, 2026 |
| 31 | Gwendolyn G Mizell | Other | 6,324 | 0 | 6,324 | 0.4% | 03 Mar, 2026 |
| 32 | Aaron P Melda | Chairman President Of Sub | 6,251 | 0 | 6,251 | 0.4% | 06 Jul, 2026 |
| 33 | Stephen C Lee | Vp, Interim Gc Secretary | 5,704 | 0 | 5,704 | 0.3% | 04 Mar, 2025 |
| 34 | Kimberly J Harris | Director | 3,939 | 0 | 3,939 | 0.2% | 07 Jan, 2025 |
| 35 | Steven O Vondran | Director | 3,597 | 0 | 3,597 | 0.2% | 07 Jan, 2026 |
| 36 | Jamie L Engstrom | Director | 1,686 | 0 | 1,686 | 0.1% | 07 Jan, 2026 |
| 37 | Timothy S. Rausch | Director | 1,251 | 0 | 1,251 | 0.1% | 03 Mar, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 18 Aug, 2026 | Ryan J Martin | Svp Finance | Disposed S | 471 | $109.87 | $51.75K | 26,008 | Direct |
| 20 Aug, 2026 | Ryan J Martin | Svp Finance | Disposed S | 500 | $109.88 | $54.94K | 25,595 | Direct |
| 14 Aug, 2026 | Theresa A Shaw | Svp And Cato | Disposed S | 325 | $108.93 | $35.40K | 32,340 | Direct |
| 03 Aug, 2026 | Michael L Moehn | Group President, Utilities | Disposed S | 6,500 | $108.96 | $708.24K | 199,689 | Direct |
| 01 Jul, 2026 | Aaron P Melda | Chairman President Of Sub | Acquired A | 2,520 | $0.00 | $0 | 6,251 | Direct |
| 01 Jul, 2026 | Ajay K Arora | Evp Of Subsidiary | Acquired A | 716 | $0.00 | $0 | 23,119 | Direct |
| 01 Jul, 2026 | Patrick E Smith | Chairman President Of Sub | Acquired A | 280 | $0.00 | $0 | 20,275 | Direct |
| 01 Jun, 2026 | Aaron P Melda | Chairman And President | Acquired A | 3,705 | $0.00 | $0 | 3,705 | Direct |
| 01 Jun, 2026 | Ajay K Arora | Evp Of Subsidiary | Acquired A | 6,797 | $0.00 | $0 | 22,326 | Direct |
| 12 May, 2026 | Theresa A Shaw | Svp And Cato | Disposed S | 1,500 | $109.35 | $164.03K | 32,943 | Direct |
| 14 May, 2026 | Theresa A Shaw | Svp And Cato | Disposed S | 325 | $109.08 | $35.45K | 32,618 | Direct |
| 01 May, 2026 | Michael L Moehn | Group President, Utilities | Disposed S | 6,500 | $113.63 | $738.60K | 205,598 | Direct |
| 05 Mar, 2026 | Catherine S Brune | Director | Disposed G | 450 | $0.00 | $0 | 26,628 | Direct |
| 04 Mar, 2026 | Ryan J Martin | Svp Finance | Disposed S | 1,300 | $113.31 | $147.30K | 26,479 | Direct |
| 01 Mar, 2026 | Timothy S. Rausch | Director | Acquired A | 1,251 | $0.00 | $0 | 1,251 | Direct |
| 27 Feb, 2026 | Theresa A Shaw | Svp And Cato | Disposed F | 1,296 | $113.28 | $146.81K | 34,397 | Direct |
| 27 Feb, 2026 | Michael L Moehn | Group President, Utilities | Disposed F | 14,355 | $113.28 | $1.63Mn | 211,525 | Direct |
| 27 Feb, 2026 | Martin J Lyons | Chairman, President Ceo | Disposed F | 28,154 | $113.28 | $3.19Mn | 309,499 | Direct |
| 27 Feb, 2026 | Mark C Lindgren | Other | Disposed F | 2,054 | $113.28 | $232.68K | 47,046 | Direct |
| 27 Feb, 2026 | Shawn E Schukar | Other | Disposed F | 3,148 | $113.28 | $356.61K | 61,805 | Direct |