As of September 29, 2026, the three largest insider holders of ALNT are Richard S Warzala (Chief Executive Officer, 1.49Mn shares), Robert P Maida (Senior Vp And Group President, 108.25K shares), Michael R Leach (Chief Financial Officer, 78.64K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Richard S Warzala | Chief Executive Officer | 1,489,106 | 0 | 1,489,106 | 73.5% | 12 Aug, 2026 |
| 2 | Robert P Maida | Senior Vp And Group President | 108,249 | 0 | 108,249 | 5.3% | 06 Sep, 2023 |
| 3 | Michael R Leach | Chief Financial Officer | 78,641 | 0 | 78,641 | 3.9% | 03 Apr, 2024 |
| 4 | Richard D Federico | Director | 77,295 | 0 | 77,295 | 3.8% | 06 Aug, 2026 |
| 5 | Helmut Pirthauer | Vp And Group President | 44,998 | 0 | 44,998 | 2.2% | 03 Apr, 2026 |
| 6 | Michael R Winter | Director | 39,154 | 1,304 | 40,458 | 2.0% | 23 Sep, 2026 |
| 7 | Stephen Warzala | Vp And Group President | 34,484 | 0 | 34,484 | 1.7% | 03 Apr, 2026 |
| 8 | James J Tanous | Director | 33,983 | 0 | 33,983 | 1.7% | 08 May, 2023 |
| 9 | Robert B Engel | Director | 31,131 | 0 | 31,131 | 1.5% | 06 Aug, 2026 |
| 10 | Ashish Bendre | Vp And Group President | 18,411 | 0 | 18,411 | 0.9% | 08 May, 2026 |
| 11 | Kenneth Arthur May | Chief Technology Officer | 18,124 | 0 | 18,124 | 0.9% | 03 Apr, 2026 |
| 12 | Nicole R Tzetzo | Director | 14,876 | 0 | 14,876 | 0.7% | 06 Aug, 2026 |
| 13 | James A Michaud | Chief Financial Officer | 13,963 | 0 | 13,963 | 0.7% | 03 Apr, 2026 |
| 14 | Steven C. Finch | Director | 13,649 | 0 | 13,649 | 0.7% | 06 Aug, 2026 |
| 15 | Geoffery Rondeau | Vp Of Operational Excellence | 7,272 | 0 | 7,272 | 0.4% | 16 May, 2025 |
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 |
|---|---|---|---|---|---|---|---|---|
| 23 Sep, 2026 | Michael R Winter | Director | Disposed G | 374 | — | — | 39,611 | Direct |
| 23 Sep, 2026 | Michael R Winter | Director | Disposed S | 457 | $109.27 | $49.94K | 39,154 | Direct |
| 23 Sep, 2026 | Michael R Winter | Director | Acquired P | 457 | $108.97 | $49.80K | 1,304 | Indirect |
| 10 Aug, 2026 | Richard S Warzala | Chief Executive Officer | Disposed S | 17,028 | $112.81 | $1.92Mn | 1,552,078 | Direct |
| 10 Aug, 2026 | Richard S Warzala | Chief Executive Officer | Disposed S | 18,176 | $113.52 | $2.06Mn | 1,533,902 | Direct |
| 10 Aug, 2026 | Richard S Warzala | Chief Executive Officer | Disposed S | 33,944 | $113.96 | $3.87Mn | 1,499,958 | Direct |
| 10 Aug, 2026 | Richard S Warzala | Chief Executive Officer | Disposed S | 852 | $115.35 | $98.28K | 1,499,106 | Direct |
| 10 Aug, 2026 | Richard S Warzala | Chief Executive Officer | Disposed G | 10,000 | — | — | 1,489,106 | Direct |
| 05 Aug, 2026 | Richard D Federico | Director | Acquired A | 331 | $93.25 | $30.87K | 77,295 | Direct |
| 05 Aug, 2026 | Robert B Engel | Director | Acquired A | 291 | $93.25 | $27.14K | 31,131 | Direct |
| 05 Aug, 2026 | Nicole R Tzetzo | Director | Acquired A | 291 | $93.25 | $27.14K | 14,876 | Direct |
| 05 Aug, 2026 | Steven C. Finch | Director | Acquired A | 291 | $93.25 | $27.14K | 13,649 | Direct |
| 05 Aug, 2026 | Michael R Winter | Director | Acquired A | 291 | $93.25 | $27.14K | 39,985 | Direct |
| 01 Apr, 2026 | Ashish Bendre | Vp And Group President | Disposed F | 2,005 | $61.82 | $123.95K | 18,193 | Direct |
| 04 Jun, 2026 | Robert B Engel | Director | Disposed G | 1,750 | — | — | 30,840 | Direct |
| 06 May, 2026 | Richard D Federico | Director | Acquired A | 401 | $77.52 | $31.09K | 76,964 | Direct |
| 06 May, 2026 | Steven C. Finch | Director | Acquired A | 353 | $77.52 | $27.36K | 13,358 | Direct |
| 06 May, 2026 | Nicole R Tzetzo | Director | Acquired A | 353 | $77.52 | $27.36K | 14,585 | Direct |
| 06 May, 2026 | Ashish Bendre | Vp And Group President | Acquired A | 403 | $77.52 | $31.24K | 18,411 | Direct |
| 06 May, 2026 | Robert B Engel | Director | Acquired A | 353 | $77.52 | $27.36K | 32,590 | Direct |