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$STX

$822.32 -$8.74 (1.05%)

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Valuations P Insider Transactions P Congressional Trades P

Insider Transactions

Insider Transaction Summary

Holdings, L.P. ValueAct

23,928,331 shares

Net: 0 B/S: -

Partners I, LLC VA

13,437,070 shares

Net: 0 B/S: -

Capital Master Fund, L.P. ValueAct

946,100 shares

Net: 0 B/S: -

WILLIAM D MOSLEY

324,870 shares

Net: +267,356 B/S: 10.77

STEPHEN J LUCZO

225,941 shares

Net: 0 B/S: -

MALLEY PATRICK J O

136,793 shares

Net: 0 B/S: -

KENNETH M MASSARONI

108,433 shares

Net: 0 B/S: -

Gianluca Romano

41,381 shares

Net: +105,515 B/S: 25.63

MARK RE

40,470 shares

Net: 0 B/S: -

Ravi Naik

38,857 shares

Net: 0 B/S: -

Albert A Pimentel

38,226 shares

Net: 0 B/S: -

Jeffrey D. Nygaard

35,969 shares

Net: 0 B/S: -

CHONG SUP PARK

32,527 shares

Net: 0 B/S: -

DOUGLAS J DEHAAN

32,517 shares

Net: 0 B/S: -

KATHERINE SCHUELKE

29,063 shares

Net: 0 B/S: -

Kristen M Onken

23,729 shares

Net: 0 B/S: -

MEI WEI CHENG

20,047 shares

Net: 0 B/S: -

Regan J MacPherson

16,702 shares

Net: 0 B/S: -

DAVID H JR MORTON

16,076 shares

Net: 0 B/S: -

PHILIP G BRACE

16,069 shares

Net: 0 B/S: -

Jeffrey D. Fochtman

14,736 shares

Net: 0 B/S: -

JUDY BRUNER

14,314 shares

Net: +2,046 B/S: ∞

PRAT BHATT

12,869 shares

Net: +2,626 B/S: 4.27

John Christopher Morris

12,199 shares

Net: +32,450 B/S: 14.12

Stephanie Tilenius

10,704 shares

Net: +40 B/S: 1.19

JAMES J MURPHY

10,569 shares

Net: 0 B/S: -

Geraldine Hottier-Fayon

8,216 shares

Net: 0 B/S: -

Shankar Arumugavelu

6,626 shares

Net: -2,374 B/S: 0.71

ROBERT A BRUGGEWORTH

6,591 shares

Net: 0 B/S: -

WILLIAM T III COLEMAN

5,847 shares

Net: 0 B/S: -

FRANK BIONDI

5,399 shares

Net: 0 B/S: -

Ban Seng Teh

4,290 shares

Net: +36,004 B/S: 1.84

Kathryn R. Scolnick

4,256 shares

Net: 0 B/S: -

Yolanda Lee Conyers

4,101 shares

Net: +1,302 B/S: 1.84

Holdings GP, LLC ValueAct

3,803 shares

Net: 0 B/S: -

MICHAEL R CANNON

1,868 shares

Net: +4,472 B/S: ∞

Dylan G. Haggart

1,580 shares

Net: +3,626 B/S: ∞

RICHARD L CLEMMER

1,580 shares

Net: +3,626 B/S: ∞

Mark Adams

1,580 shares

Net: +3,626 B/S: ∞

Kian Fatt Chong

1,461 shares

Net: +13,348 B/S: 2.03

Thomas A Szlosek

357 shares

Net: +2,407 B/S: ∞

James CI Lee

324 shares

Net: +16,128 B/S: 9.6

Jay L Geldmacher

223 shares

Net: -1,049 B/S: 0.91

EDWARD J ZANDER

0 shares

Net: 0 B/S: -

Dambisa F Moyo

0 shares

Net: 0 B/S: -

GREGORIO REYES

0 shares

Net: 0 B/S: -

Insider Name	Current Shares	Net Change (1yr)	Buy/Sell Ratio
Holdings, L.P. ValueAct	23,928,331	0	-
Partners I, LLC VA	13,437,070	0	-
Capital Master Fund, L.P. ValueAct	946,100	0	-
WILLIAM D MOSLEY	324,870	+267,356	10.77
STEPHEN J LUCZO	225,941	0	-
MALLEY PATRICK J O	136,793	0	-
KENNETH M MASSARONI	108,433	0	-
Gianluca Romano	41,381	+105,515	25.63
MARK RE	40,470	0	-
Ravi Naik	38,857	0	-
Albert A Pimentel	38,226	0	-
Jeffrey D. Nygaard	35,969	0	-
CHONG SUP PARK	32,527	0	-
DOUGLAS J DEHAAN	32,517	0	-
KATHERINE SCHUELKE	29,063	0	-
Kristen M Onken	23,729	0	-
MEI WEI CHENG	20,047	0	-
Regan J MacPherson	16,702	0	-
DAVID H JR MORTON	16,076	0	-
PHILIP G BRACE	16,069	0	-
Jeffrey D. Fochtman	14,736	0	-
JUDY BRUNER	14,314	+2,046	∞
PRAT BHATT	12,869	+2,626	4.27
John Christopher Morris	12,199	+32,450	14.12
Stephanie Tilenius	10,704	+40	1.19
JAMES J MURPHY	10,569	0	-
Geraldine Hottier-Fayon	8,216	0	-
Shankar Arumugavelu	6,626	-2,374	0.71
ROBERT A BRUGGEWORTH	6,591	0	-
WILLIAM T III COLEMAN	5,847	0	-
FRANK BIONDI	5,399	0	-
Ban Seng Teh	4,290	+36,004	1.84
Kathryn R. Scolnick	4,256	0	-
Yolanda Lee Conyers	4,101	+1,302	1.84
Holdings GP, LLC ValueAct	3,803	0	-
MICHAEL R CANNON	1,868	+4,472	∞
Dylan G. Haggart	1,580	+3,626	∞
RICHARD L CLEMMER	1,580	+3,626	∞
Mark Adams	1,580	+3,626	∞
Kian Fatt Chong	1,461	+13,348	2.03
Thomas A Szlosek	357	+2,407	∞
James CI Lee	324	+16,128	9.6
Jay L Geldmacher	223	-1,049	0.91
EDWARD J ZANDER	0	0	-
Dambisa F Moyo	0	0	-
GREGORIO REYES	0	0	-

Individual Transactions

June 10, 2026

Gianluca Romano

Open Market Sale

Change: -524

Price: $821.73

Shares: 41,381

Value: -$430,586

Ban Seng Teh

Open Market Sale

Change: -663

Price: $821.86

Shares: 4,290

Value: -$544,893

WILLIAM D MOSLEY

Open Market Sale

Change: -1,537

Price: $821.74

Shares: 324,870

Value: -$1,263,015

John Christopher Morris

Open Market Sale

Change: -254

Price: $821.66

Shares: 12,199

Value: -$208,702

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Gianluca Romano	Jun 11	Open Market Sale (S) Market Sale	41,381	-524	$821.73	-$430,586
Ban Seng Teh	Jun 11	Open Market Sale (S) Market Sale	4,290	-663	$821.86	-$544,893
WILLIAM D MOSLEY	Jun 11	Open Market Sale (S) Market Sale	324,870	-1,537	$821.74	-$1,263,015
John Christopher Morris	Jun 11	Open Market Sale (S) Market Sale	12,199	-254	$821.66	-$208,702

June 09, 2026

Gianluca Romano

Option Exercise/Conversion

Change: +959

Price: $0.00

Shares: 41,904

Value: +$0

WILLIAM D MOSLEY

Option Exercise/Conversion

Change: +2,815

Price: $0.00

Shares: 326,406

Value: +$0

John Christopher Morris

Option Exercise/Conversion

Change: +499

Price: $0.00

Shares: 12,453

Value: +$0

Ban Seng Teh

Option Exercise/Conversion

Change: +599

Price: $0.00

Shares: 4,290

Value: +$0

Kian Fatt Chong

Option Exercise/Conversion

Change: +202

Price: $0.00

Shares: 1,461

Value: +$0

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Gianluca Romano	Jun 11	Option Exercise/Conversion (M) Compensation/Award	41,904	+959	$0.00	+$0
WILLIAM D MOSLEY	Jun 11	Option Exercise/Conversion (M) Compensation/Award	326,406	+2,815	$0.00	+$0
John Christopher Morris	Jun 11	Option Exercise/Conversion (M) Compensation/Award	12,453	+499	$0.00	+$0
Ban Seng Teh	Jun 11	Option Exercise/Conversion (M) Compensation/Award	4,290	+599	$0.00	+$0
Kian Fatt Chong	Jun 11	Option Exercise/Conversion (M) Compensation/Award	1,461	+202	$0.00	+$0

June 04, 2026

Shankar Arumugavelu

Open Market Sale

Change: -1,000

Price: $927.68

Shares: 6,626

Value: -$927,680

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Shankar Arumugavelu	Jun 04	Open Market Sale (S) Market Sale	6,626	-1,000	$927.68	-$927,680

June 02, 2026

PRAT BHATT

Open Market Sale

Change: -1,000

Price: $929.88

Shares: 12,869

Value: -$929,880

Insider	Filing Date	Transaction	Shares	Change	Price	Value
PRAT BHATT	Jun 02	Open Market Sale (S) Market Sale	12,869	-1,000	$929.88	-$929,880

June 01, 2026

WILLIAM D MOSLEY

Open Market Sale

Change: -600

Price: $884.62

Shares: 352,991

Value: -$530,774

Yolanda Lee Conyers

Open Market Sale

Change: -750

Price: $885.33

Shares: 4,101

Value: -$663,997

WILLIAM D MOSLEY

Option Exercise/Conversion

Change: +14,000

Price: $46.23

Shares: 353,591

Value: +$647,220

Insider	Filing Date	Transaction	Shares	Change	Price	Value
WILLIAM D MOSLEY	Jun 02	Open Market Sale (S) Market Sale	352,991	-600	$884.62	-$530,774
Yolanda Lee Conyers	Jun 02	Open Market Sale (S) Market Sale	4,101	-750	$885.33	-$663,997
WILLIAM D MOSLEY	Jun 02	Option Exercise/Conversion (M) Compensation/Award	353,591	+14,000	$46.23	+$647,220

May 20, 2026

WILLIAM D MOSLEY

Open Market Sale

Change: -120

Price: $742.01

Shares: 369,471

Value: -$89,040

WILLIAM D MOSLEY

Option Exercise/Conversion

Change: +14,000

Price: $46.23

Shares: 369,591

Value: +$647,220

Insider	Filing Date	Transaction	Shares	Change	Price	Value
WILLIAM D MOSLEY	May 21	Open Market Sale (S) Market Sale	369,471	-120	$742.01	-$89,040
WILLIAM D MOSLEY	May 21	Option Exercise/Conversion (M) Compensation/Award	369,591	+14,000	$46.23	+$647,220

May 14, 2026

Ban Seng Teh

Open Market Sale

Change: -8,003

Price: $817.28

Shares: 3,691

Value: -$6,540,725

Ban Seng Teh

Option Exercise/Conversion

Change: +3,515

Price: $64.31

Shares: 7,206

Value: +$226,049

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Ban Seng Teh	May 14	Open Market Sale (S) Market Sale	3,691	-8,003	$817.28	-$6,540,725
Ban Seng Teh	May 14	Option Exercise/Conversion (M) Compensation/Award	7,206	+3,515	$64.31	+$226,049

May 13, 2026

Ban Seng Teh

Open Market Sale

Change: -520

Price: $800.26

Shares: 10,728

Value: -$416,135

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Ban Seng Teh	May 14	Open Market Sale (S) Market Sale	10,728	-520	$800.26	-$416,135

May 07, 2026

Gianluca Romano

Open Market Sale

Change: -1,902

Price: $770.00

Shares: 40,945

Value: -$1,464,540

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Gianluca Romano	May 08	Open Market Sale (S) Market Sale	40,945	-1,902	$770.00	-$1,464,540