AP's three largest insider shareholders as of September 29, 2026 are Berkman Investment Co Louis (TenPercentOwner, 3.13Mn shares), Brett Mcbrayer (Chief Executive Officer, 557.69K shares), Michael I German (Director, 229.04K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Berkman Investment Co Louis | TenPercentOwner | 3,127,792 | 0 | 3,127,792 | 57.2% | 26 Nov, 2025 |
| 2 | Brett Mcbrayer | Chief Executive Officer | 557,694 | 0 | 557,694 | 10.2% | 20 May, 2026 |
| 3 | Michael I German | Director | 229,044 | 0 | 229,044 | 4.2% | 18 May, 2026 |
| 4 | Samuel Lyon | President Of Union Electric | 181,233 | 0 | 181,233 | 3.3% | 26 Jun, 2026 |
| 5 | Michael G Mcauley | Senior V.P., Cfo Treasurer | 175,766 | 0 | 175,766 | 3.2% | 16 May, 2025 |
| 6 | James J Abel | Director | 150,546 | 0 | 150,546 | 2.8% | 15 May, 2025 |
| 7 | Carl H Ii Pforzheimer | Director | 141,383 | 0 | 141,383 | 2.6% | 18 May, 2023 |
| 8 | Elizabeth Anne Fessenden | Director | 126,704 | 0 | 126,704 | 2.3% | 18 May, 2026 |
| 9 | Rose Hoover | President Chief Admin. Off. | 115,475 | 0 | 115,475 | 2.1% | 04 Jan, 2022 |
| 10 | Stephen E Paul | Director | 112,764 | 0 | 112,764 | 2.1% | 17 May, 2024 |
| 11 | Frederick D. Disanto | Director | 98,089 | 0 | 98,089 | 1.8% | 17 May, 2024 |
| 12 | Laurence E Paul | Director | 91,742 | 0 | 91,742 | 1.7% | 18 May, 2026 |
| 13 | Robert Demichiei | Director | 85,559 | 0 | 85,559 | 1.6% | 18 May, 2026 |
| 14 | David George Anderson | Vp, Cfo Treasurer, Pres. Als | 82,966 | 0 | 82,966 | 1.5% | 19 May, 2026 |
| 15 | Terrence W Kenny | President,Airliq. Proc. Group | 71,986 | 0 | 71,986 | 1.3% | 04 Jan, 2022 |
| 16 | Darrell L Mcnair | Director | 65,686 | 0 | 65,686 | 1.2% | 28 Aug, 2026 |
| 17 | William K Lieberman | Director | 58,286 | 0 | 58,286 | 1.1% | 18 May, 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 |
|---|---|---|---|---|---|---|---|---|
| 27 Aug, 2026 | Darrell L Mcnair | Director | Disposed G | 5,600 | $0.00 | $0 | 65,686 | Direct |
| 25 Jun, 2026 | Samuel Lyon | President Of Union Electric | Disposed S | 9,500 | $9.82 | $93.27K | 181,233 | Direct |
| 18 Jun, 2026 | Samuel Lyon | President Of Union Electric | Disposed S | 547 | $11.30 | $6.18K | 190,733 | Direct |
| 19 May, 2026 | Brett Mcbrayer | Chief Executive Officer | Acquired P | 3,300 | $9.03 | $29.79K | 557,694 | Direct |
| 15 May, 2026 | Samuel Lyon | President Of Union Electric | Disposed F | 3,029 | $10.85 | $32.86K | 201,122 | Direct |
| 15 May, 2026 | David George Anderson | Vp, Cfo Treasurer, Pres. Als | Disposed F | 1,370 | $10.85 | $14.86K | 84,733 | Direct |
| 15 May, 2026 | Brett Mcbrayer | Chief Executive Officer | Disposed F | 9,396 | $10.85 | $101.95K | 576,335 | Direct |
| 15 May, 2026 | Samuel Lyon | President Of Union Electric | Disposed F | 3,166 | $10.85 | $34.35K | 197,956 | Direct |
| 15 May, 2026 | David George Anderson | Vp, Cfo Treasurer, Pres. Als | Disposed F | 2,179 | $10.85 | $23.64K | 82,554 | Direct |
| 15 May, 2026 | Brett Mcbrayer | Chief Executive Officer | Disposed F | 8,568 | $10.85 | $92.96K | 567,767 | Direct |
| 15 May, 2026 | Brett Mcbrayer | Chief Executive Officer | Disposed F | 7,777 | $10.85 | $84.38K | 559,990 | Direct |
| 15 May, 2026 | Samuel Lyon | President Of Union Electric | Disposed F | 3,547 | $10.85 | $38.48K | 194,409 | Direct |
| 15 May, 2026 | David George Anderson | Vp, Cfo Treasurer, Pres. Als | Disposed F | 2,489 | $10.85 | $27.01K | 80,065 | Direct |
| 15 May, 2026 | Samuel Lyon | President Of Union Electric | Disposed F | 18,185 | $10.85 | $197.31K | 176,224 | Direct |
| 15 May, 2026 | Brett Mcbrayer | Chief Executive Officer | Disposed F | 46,656 | $10.85 | $506.22K | 513,334 | Direct |
| 15 May, 2026 | David George Anderson | Vp, Cfo Treasurer, Pres. Als | Disposed F | 8,216 | $10.85 | $89.14K | 71,849 | Direct |
| 15 May, 2026 | David George Anderson | Vp, Cfo Treasurer, Pres. Als | Acquired A | 11,117 | $0.00 | $0 | 82,966 | Direct |
| 15 May, 2026 | Samuel Lyon | President Of Union Electric | Acquired A | 15,056 | $0.00 | $0 | 191,280 | Direct |
| 15 May, 2026 | Brett Mcbrayer | Chief Executive Officer | Acquired A | 41,060 | $0.00 | $0 | 554,394 | Direct |
| 15 May, 2026 | Laurence E Paul | Director | Acquired A | 7,374 | $0.00 | $0 | 91,742 | Direct |