ATRC's three largest insider shareholders as of September 29, 2026 are Michael H Carrel (President, Ceo, Director, 774.43K shares), Douglas J Seith (Chief Operating Officer, 229.87K shares), Angela L Wirick (Chief Financial Officer, 204.89K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Michael H Carrel | President, Ceo, Director | 774,434 | 0 | 774,434 | 36.2% | 03 Aug, 2026 |
| 2 | Douglas J Seith | Chief Operating Officer | 229,867 | 0 | 229,867 | 10.7% | 02 Jul, 2026 |
| 3 | Angela L Wirick | Chief Financial Officer | 204,893 | 0 | 204,893 | 9.6% | 03 Mar, 2026 |
| 4 | Salvatore Privitera | Chief Technical Officer | 142,745 | 0 | 142,745 | 6.7% | 24 Sep, 2026 |
| 5 | Robert S. White | Director | 128,318 | 0 | 128,318 | 6.0% | 20 May, 2026 |
| 6 | Mark A Collar | Director | 100,871 | 0 | 100,871 | 4.7% | 15 Mar, 2023 |
| 7 | Justin J Noznesky | Chief Mktg Strategy Officer | 100,219 | 0 | 100,219 | 4.7% | 30 Jul, 2026 |
| 8 | Karl S. Dahlquist | Chief Legal Officer | 87,319 | 0 | 87,319 | 4.1% | 26 Aug, 2026 |
| 9 | Vinayak Doraiswamy | Chief Scientific Officer | 86,511 | 0 | 86,511 | 4.0% | 30 Jul, 2026 |
| 10 | B Kristine Johnson | Director | 55,954 | 0 | 55,954 | 2.6% | 20 May, 2026 |
| 11 | Deborah Lee Yount | Chief Human Resources Officer | 45,578 | 0 | 45,578 | 2.1% | 04 Mar, 2025 |
| 12 | Sven Wehrwein | Director | 40,518 | 0 | 40,518 | 1.9% | 30 Jul, 2026 |
| 13 | Regina E Groves | Director | 34,546 | 0 | 34,546 | 1.6% | 14 Sep, 2026 |
| 14 | Deborah H Telman | Director | 28,328 | 0 | 28,328 | 1.3% | 20 May, 2026 |
| 15 | Shlomo Nachman | Director | 24,655 | 0 | 24,655 | 1.2% | 20 May, 2026 |
| 16 | Karen Prange | Director | 22,809 | 0 | 22,809 | 1.1% | 07 Aug, 2026 |
| 17 | Tonya Austin | Chief Human Resources Officer | 17,621 | 0 | 17,621 | 0.8% | 17 May, 2022 |
| 18 | Maggie Yuen | Director | 14,015 | 0 | 14,015 | 0.7% | 07 Aug, 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 |
|---|---|---|---|---|---|---|---|---|
| 23 Sep, 2026 | Salvatore Privitera | Chief Technical Officer | Disposed S | 4,519 | $60.00 | $271.14K | 142,745 | Direct |
| 08 Sep, 2026 | Salvatore Privitera | Chief Technical Officer | Disposed S | 3,657 | $55.00 | $201.14K | 147,264 | Direct |
| 02 Sep, 2026 | Salvatore Privitera | Chief Technical Officer | Disposed S | 7,763 | $52.50 | $407.56K | 150,921 | Direct |
| 24 Aug, 2026 | Karl S. Dahlquist | Chief Legal Officer | Disposed S | 9,370 | $48.89 | $458.10K | 87,319 | Direct |
| 05 Aug, 2026 | Maggie Yuen | Director | Disposed S | 3,500 | $38.42 | $134.47K | 14,015 | Direct |
| 05 Aug, 2026 | Karen Prange | Director | Disposed S | 3,564 | $38.80 | $138.28K | 22,809 | Direct |
| 30 Jul, 2026 | Michael H Carrel | President, Ceo, Director | Disposed G | 700 | $0.00 | $0 | 778,434 | Direct |
| 30 Jul, 2026 | Michael H Carrel | President, Ceo, Director | Disposed G | 4,000 | $0.00 | $0 | 774,434 | Direct |
| 29 Jul, 2026 | Justin J Noznesky | Chief Mktg Strategy Officer | Disposed S | 6,182 | $38.80 | $239.86K | 100,219 | Direct |
| 28 Jul, 2026 | Vinayak Doraiswamy | Chief Scientific Officer | Disposed S | 6,000 | $38.88 | $233.28K | 86,511 | Direct |
| 28 Jul, 2026 | Sven Wehrwein | Director | Acquired M | 25,000 | $19.95 | $498.75K | 65,518 | Direct |
| 28 Jul, 2026 | Sven Wehrwein | Director | Disposed S | 25,000 | $37.84 | $946.00K | 40,518 | Direct |
| 28 Jul, 2026 | Sven Wehrwein | Director | Disposed M | 25,000 | $0.00 | $0 | 0 | Direct |
| 30 Jun, 2026 | Douglas J Seith | Chief Operating Officer | Acquired A | 527 | $23.78 | $12.53K | 229,867 | Direct |
| 30 Jun, 2026 | Vinayak Doraiswamy | Chief Scientific Officer | Acquired A | 636 | $23.78 | $15.12K | 92,511 | Direct |
| 30 Jun, 2026 | Karl S. Dahlquist | Chief Legal Officer | Acquired A | 636 | $23.78 | $15.12K | 96,689 | Direct |
| 30 Jun, 2026 | Salvatore Privitera | Chief Technical Officer | Acquired A | 636 | $23.78 | $15.12K | 158,684 | Direct |
| 30 Jun, 2026 | Michael H Carrel | President, Ceo, Director | Acquired A | 636 | $23.78 | $15.12K | 779,134 | Direct |
| 20 May, 2026 | Karen Prange | Director | Disposed S | 3,000 | $28.65 | $85.95K | 26,373 | Direct |
| 18 May, 2026 | Maggie Yuen | Director | Acquired A | 6,144 | $0.00 | $0 | 17,515 | Direct |