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$ATRC

$40.20 +$2.44 (6.46%)

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Insider Transactions

Insider Transaction Summary

MICHAEL H CARREL

779,498 shares

Net: -29,159 B/S: ∞

KAREN P ROBARDS

318,328 shares

Net: 0 B/S: -

Douglas J Seith

229,340 shares

Net: +19,695 B/S: ∞

Angela L Wirick

204,893 shares

Net: +17,022 B/S: ∞

Salvatore Privitera

158,048 shares

Net: +17,263 B/S: ∞

Mark R Lanning

140,886 shares

Net: 0 B/S: -

M. Andrew Wade

140,537 shares

Net: 0 B/S: -

ROBERT S. WHITE

128,318 shares

Net: +16,144 B/S: ∞

Justin J Noznesky

106,401 shares

Net: +4,239 B/S: 3.43

Mark A Collar

100,871 shares

Net: 0 B/S: -

Karl S. Dahlquist

96,053 shares

Net: +12,304 B/S: ∞

Vinayak Doraiswamy

91,875 shares

Net: +2,305 B/S: 2.43

ANDREW L LUX

66,549 shares

Net: 0 B/S: -

Patricia J Kennedy

63,124 shares

Net: 0 B/S: -

Michael D Hooven

57,049 shares

Net: 0 B/S: -

B KRISTINE JOHNSON

55,954 shares

Net: +6,144 B/S: ∞

Deborah Lee Yount

45,578 shares

Net: 0 B/S: -

Scott William Drake

41,036 shares

Net: 0 B/S: -

SVEN WEHRWEIN

40,518 shares

Net: +6,144 B/S: 1.31

REGINA E GROVES

39,859 shares

Net: +3,692 B/S: 2.51

Deborah H Telman

28,328 shares

Net: +6,144 B/S: ∞

Karen Prange

26,373 shares

Net: +3,144 B/S: 2.05

Shlomo Nachman

24,655 shares

Net: +6,144 B/S: ∞

Elizabeth D Krell

19,967 shares

Net: 0 B/S: -

Tonya Austin

17,621 shares

Net: 0 B/S: -

Maggie Yuen

17,515 shares

Net: +3,144 B/S: 2.05

Daniel P Florin

10,103 shares

Net: 0 B/S: -

RICHARD M JOHNSTON

5,805 shares

Net: 0 B/S: -

Insider Name	Current Shares	Net Change (1yr)	Buy/Sell Ratio
MICHAEL H CARREL	779,498	-29,159	∞
KAREN P ROBARDS	318,328	0	-
Douglas J Seith	229,340	+19,695	∞
Angela L Wirick	204,893	+17,022	∞
Salvatore Privitera	158,048	+17,263	∞
Mark R Lanning	140,886	0	-
M. Andrew Wade	140,537	0	-
ROBERT S. WHITE	128,318	+16,144	∞
Justin J Noznesky	106,401	+4,239	3.43
Mark A Collar	100,871	0	-
Karl S. Dahlquist	96,053	+12,304	∞
Vinayak Doraiswamy	91,875	+2,305	2.43
ANDREW L LUX	66,549	0	-
Patricia J Kennedy	63,124	0	-
Michael D Hooven	57,049	0	-
B KRISTINE JOHNSON	55,954	+6,144	∞
Deborah Lee Yount	45,578	0	-
Scott William Drake	41,036	0	-
SVEN WEHRWEIN	40,518	+6,144	1.31
REGINA E GROVES	39,859	+3,692	2.51
Deborah H Telman	28,328	+6,144	∞
Karen Prange	26,373	+3,144	2.05
Shlomo Nachman	24,655	+6,144	∞
Elizabeth D Krell	19,967	0	-
Tonya Austin	17,621	0	-
Maggie Yuen	17,515	+3,144	2.05
Daniel P Florin	10,103	0	-
RICHARD M JOHNSTON	5,805	0	-

Individual Transactions

May 20, 2026

Karen Prange

Open Market Sale

Change: -3,000

Price: $28.65

Shares: 26,373

Value: -$85,950

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Karen Prange	May 22	Open Market Sale (S) Market Sale	26,373	-3,000	$28.65	-$85,950

May 18, 2026

SVEN WEHRWEIN

Grant/Award Acquisition

Change: +6,144

Price: $0.00

Shares: 40,518

Value: +$0

B KRISTINE JOHNSON

Grant/Award Acquisition

Change: +6,144

Price: $0.00

Shares: 55,954

Value: +$0

Karen Prange

Grant/Award Acquisition

Change: +6,144

Price: $0.00

Shares: 29,373

Value: +$0

ROBERT S. WHITE

Grant/Award Acquisition

Change: +6,144

Price: $0.00

Shares: 128,318

Value: +$0

REGINA E GROVES

Grant/Award Acquisition

Change: +6,144

Price: $0.00

Shares: 39,859

Value: +$0

Maggie Yuen

Grant/Award Acquisition

Change: +6,144

Price: $0.00

Shares: 17,515

Value: +$0

Deborah H Telman

Grant/Award Acquisition

Change: +6,144

Price: $0.00

Shares: 28,328

Value: +$0

Shlomo Nachman

Grant/Award Acquisition

Change: +6,144

Price: $0.00

Shares: 24,655

Value: +$0

Insider	Filing Date	Transaction	Shares	Change	Price	Value
SVEN WEHRWEIN	May 20	Grant/Award Acquisition (A) Compensation/Award	40,518	+6,144	$0.00	+$0
B KRISTINE JOHNSON	May 20	Grant/Award Acquisition (A) Compensation/Award	55,954	+6,144	$0.00	+$0
Karen Prange	May 20	Grant/Award Acquisition (A) Compensation/Award	29,373	+6,144	$0.00	+$0
ROBERT S. WHITE	May 20	Grant/Award Acquisition (A) Compensation/Award	128,318	+6,144	$0.00	+$0
REGINA E GROVES	May 20	Grant/Award Acquisition (A) Compensation/Award	39,859	+6,144	$0.00	+$0
Maggie Yuen	May 20	Grant/Award Acquisition (A) Compensation/Award	17,515	+6,144	$0.00	+$0
Deborah H Telman	May 20	Grant/Award Acquisition (A) Compensation/Award	28,328	+6,144	$0.00	+$0
Shlomo Nachman	May 20	Grant/Award Acquisition (A) Compensation/Award	24,655	+6,144	$0.00	+$0

May 15, 2026

Vinayak Doraiswamy

Open Market Sale

Change: -5,000

Price: $28.13

Shares: 91,875

Value: -$140,650

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Vinayak Doraiswamy	May 18	Open Market Sale (S) Market Sale	91,875	-5,000	$28.13	-$140,650

March 12, 2026

Vinayak Doraiswamy

Open Market Sale

Change: -5,000

Price: $29.83

Shares: 96,875

Value: -$149,150

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Vinayak Doraiswamy	Mar 16	Open Market Sale (S) Market Sale	96,875	-5,000	$29.83	-$149,150

March 10, 2026

ROBERT S. WHITE

Option Exercise/Conversion

Change: +10,000

Price: $14.99

Shares: 122,174

Value: +$149,900

Insider	Filing Date	Transaction	Shares	Change	Price	Value
ROBERT S. WHITE	Mar 12	Option Exercise/Conversion (M) Compensation/Award	122,174	+10,000	$14.99	+$149,900

March 06, 2026

MICHAEL H CARREL

Gift

Change: -5,000

Price: $0.00

Shares: 779,498

Value: -$0

Insider	Filing Date	Transaction	Shares	Change	Price	Value
MICHAEL H CARREL	Mar 09	Gift (G) Non-Market Transfer	779,498	-5,000	$0.00	-$0

March 01, 2026

MICHAEL H CARREL

Grant/Award Acquisition

Change: +68,618

Price: $0.00

Shares: 755,995

Value: +$0

Salvatore Privitera

Grant/Award Acquisition

Change: +30,390

Price: $0.00

Shares: 155,977

Value: +$0

Justin J Noznesky

Tax Payment

Change: -15,586

Price: $31.26

Shares: 106,401

Value: -$487,218

Justin J Noznesky

Grant/Award Acquisition

Change: +27,991

Price: $0.00

Shares: 106,789

Value: +$0

Vinayak Doraiswamy

Tax Payment

Change: -15,585

Price: $31.26

Shares: 101,875

Value: -$487,187

Vinayak Doraiswamy

Grant/Award Acquisition

Change: +30,390

Price: $0.00

Shares: 102,262

Value: +$0

Karl S. Dahlquist

Tax Payment

Change: -15,687

Price: $31.26

Shares: 96,053

Value: -$490,375

Insider	Filing Date	Transaction	Shares	Change	Price	Value
MICHAEL H CARREL	Mar 03	Grant/Award Acquisition (A) Compensation/Award	755,995	+68,618	$0.00	+$0
Salvatore Privitera	Mar 03	Grant/Award Acquisition (A) Compensation/Award	155,977	+30,390	$0.00	+$0
Justin J Noznesky	Mar 03	Tax Payment (F) Tax Payment	106,401	-15,586	$31.26	-$487,218
Justin J Noznesky	Mar 03	Grant/Award Acquisition (A) Compensation/Award	106,789	+27,991	$0.00	+$0
Vinayak Doraiswamy	Mar 03	Tax Payment (F) Tax Payment	101,875	-15,585	$31.26	-$487,187
Vinayak Doraiswamy	Mar 03	Grant/Award Acquisition (A) Compensation/Award	102,262	+30,390	$0.00	+$0
Karl S. Dahlquist	Mar 03	Tax Payment (F) Tax Payment	96,053	-15,687	$31.26	-$490,375