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Seagate Technology

STX Net selling
CIK 0001137789 #406 in the set updated 17 Sep 2026
Bought (120 mo)
$344.02M
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$2.46B
$249.22M on a plan · $406.77M straight out of an exercise
Sold at will
$1.81B
182 of 1036 sales
Net
−$2.12B
−$1.46B against sales at will

By person

38 insiders · 1,063 transactions
228×

William D. Mosley holds 228 times base salary in stock. $291.96M of shares against $1.28M in salary for 2026.

Salary from the company's own proxy. The shares are what William D. Mosley last reported holding, valued at $772.15, the price Ordinary Shares was last bought or sold at on the open market here, on 15 Sep 2026.

Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
ValueAct Holdings, L.P. entity
Director
$343.77M (19)
$1.51B (36)
−$1.16B
13,437,070
5.93%
$10.38B
−42.8%
MOSLEY WILLIAM D
CEO
—
$397.08M (379) scheduled
−$397.08M
378,108
0.1668%
$291.96M
+106.7%
Romano Gianluca
EVP & CFO
—
$180.33M (201) scheduled
−$180.33M
70,757
0.0312%
$54.63M
+3,779%
LUCZO STEPHEN J
Director
—
$132.76M (56)
−$132.76M
231,788
0.1023%
$178.98M
−89.8%
Teh Ban Seng
EVP & Chief Commercial Officer
—
$112.35M (140) scheduled
−$112.35M
5,810
0.0026%
$4.49M
−59.9%
Morris John Christopher
EVP & CTO
—
$28.51M (47) scheduled
−$28.51M
31,132
0.0137%
$24.04M
+16.4%
MURPHY JAMES J
EVP, Sales & Marketing
—
$22.19M (12) scheduled
−$22.19M
10,569
0.0047%
$8.16M
+569.8%
Lee James CI
EVP & CLO
—
$13.28M (44) scheduled
−$13.28M
347
0.0002%
$267.94K
+0.3%
Nygaard Jeffrey D.
EVP, Operations and Technology
$186.90K (1)
$11.85M (28) scheduled
−$11.66M
89,493
0.0395%
$69.10M
+1,030%
SCHUELKE KATHERINE
SVP, CLO & Corporate Secretary
—
$7.65M (12) scheduled
−$7.65M
29,063
0.0128%
$22.44M
+1,048%
Chong Kian Fatt
EVP Global Operations
—
$7.15M (5)
−$7.15M
25,093
0.0111%
$19.38M
+2,221%
Naik Ravi
EVP, Lyve Storage Services
$27.02K (2)
$5.83M (3) scheduled
−$5.80M
38,857
0.0171%
$30.00M
+139.1%
MORTON DAVID H JR
EVP & CFO
—
$5.23M (6) scheduled
−$5.23M
23,346
0.0103%
$18.03M
+4.7%
Tilenius Stephanie
Director
—
$4.07M (6)
−$4.07M
10,664
0.0047%
$8.23M
+35.1%
ZANDER EDWARD J
Director
—
$4.00M (8)
−$4.00M
41,357
0.0182%
$31.93M
−58.2%
Geldmacher Jay L
Director
—
$3.73M (10)
−$3.73M
223
<0.0001%
$172.19K
−97.9%
CANNON MICHAEL R
Director
—
$3.57M (2)
−$3.57M
13,439
0.0059%
$10.38M
+14.9%
BRACE PHILIP G
Former President, CSSG
$33.34K (1)
$2.87M (8) scheduled
−$2.83M
16,069
0.0071%
$12.41M
−44.8%
Arumugavelu Shankar
Director
—
$2.40M (2)
−$2.40M
6,626
0.0029%
$5.12M
—
Conyers Yolanda Lee
Director
—
$2.22M (11) scheduled
−$2.22M
3,351
0.0015%
$2.59M
—
RE MARK
SVP & CTO
—
$1.87M (3) scheduled
−$1.87M
40,470
0.0179%
$31.25M
−25.6%
BRUNER JUDY
Director
—
$1.14M (1)
−$1.14M
18,585
0.0082%
$14.35M
+335.1%
BHATT PRAT
Director
—
$929.88K (1) scheduled
−$929.88K
12,869
0.0057%
$9.94M
—
Fochtman Jeffrey D.
SVP, Business & Marketing
—
$882.47K (3) scheduled
−$882.47K
14,736
0.0065%
$11.38M
—
Adams Mark
Director
—
$721.86K (2)
−$721.86K
14,331
0.0063%
$11.07M
—
MASSARONI KENNETH M
SVP, Interim CLO
—
$626.47K (3)
−$626.47K
108,133
0.0477%
$83.50M
−12.2%
Scolnick Kathryn R.
Interim CFO
—
$561.85K (1) scheduled
−$561.85K
4,256
0.0019%
$3.29M
+3,537%
PARK CHONG SUP
Director
—
$456.68K (3)
−$456.68K
49,336
0.0218%
$38.09M
−9.8%
Moyo Dambisa F
Director
—
$339.96K (2)
−$339.96K
0
0.0000%
$0.00
−100.0%
MacPherson Regan J
SVP and General Counsel
—
$118.70K (1)
−$118.70K
16,702
0.0074%
$12.90M
−15.6%
CLEMMER RICHARD L
Director
—
—
—
29,704
0.0131%
$22.94M
+44.3%
Onken Kristen M
Director
—
—
—
23,729
0.0105%
$18.32M
−7.3%
CHENG MEI WEI
Director
—
—
—
20,047
0.0088%
$15.48M
+33.9%
Haggart Dylan G.
Director
—
—
—
14,515
0.0064%
$11.21M
—
COLEMAN WILLIAM T III
Director
—
—
—
14,483
0.0064%
$11.18M
+161.5%
Hottier-Fayon Geraldine
Interim Prin. Accounting Ofcr
—
—
—
8,217
0.0036%
$6.34M
+67.9%
BRUGGEWORTH ROBERT A
Director
—
—
—
6,591
0.0029%
$5.09M
—
BIONDI FRANK
Director
—
—
—
5,399
0.0024%
$4.17M
+189.3%

Individual transactions

115
Insider
Date
Role
Action
Shares
Price
Amount
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
360
$843.55
$303.68K
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
280
$842.23
$235.82K
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
320
$841.05
$269.14K
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
1,000
$840.12
$840.12K
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
880
$839.15
$738.45K
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
200
$838.10
$167.62K
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
480
$836.92
$401.72K
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
1,320
$835.67
$1.10M
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
1,440
$834.80
$1.20M
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
2,080
$833.67
$1.73M
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
4,220
$832.68
$3.51M
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
4,589
$831.71
$3.82M
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
7,568
$830.74
$6.29M
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
5,593
$829.77
$4.64M
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
3,321
$828.84
$2.75M
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
1,727
$827.72
$1.43M
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
1,840
$826.72
$1.52M
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
800
$825.65
$660.52K
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
1,400
$824.60
$1.15M
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
880
$823.72
$724.87K
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
1,690
$822.50
$1.39M
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
1,550
$821.42
$1.27M
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
1,320
$820.54
$1.08M
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
1,040
$819.39
$852.16K
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
240
$868.43
$208.42K
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
320
$864.41
$276.61K
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
280
$861.07
$241.10K
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
280
$860.47
$240.93K
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
240
$857.41
$205.78K
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
240
$855.72
$205.37K
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
680
$854.41
$581.00K
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
640
$852.87
$545.84K
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
320
$851.45
$272.46K
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
80
$849.87
$67.99K
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
560
$849.53
$475.74K
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
320
$847.98
$271.35K
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
200
$846.94
$169.39K
Romano Gianluca
11 Sep 2026
EVP & CFO
Sold after exercise
200
$844.81
$168.96K
MOSLEY WILLIAM D
1 Sep 2026
CEO
Sold after exercise
80
$832.05
$66.56K
MOSLEY WILLIAM D
1 Sep 2026
CEO
Sold after exercise
80
$830.36
$66.43K
MOSLEY WILLIAM D
1 Sep 2026
CEO
Sold after exercise
80
$829.10
$66.33K
MOSLEY WILLIAM D
1 Sep 2026
CEO
Sold after exercise
120
$827.90
$99.35K
MOSLEY WILLIAM D
1 Sep 2026
CEO
Sold after exercise
340
$826.86
$281.13K
MOSLEY WILLIAM D
1 Sep 2026
CEO
Sold after exercise
580
$826.00
$479.08K
MOSLEY WILLIAM D
1 Sep 2026
CEO
Sold after exercise
600
$824.93
$494.96K
MOSLEY WILLIAM D
1 Sep 2026
CEO
Sold after exercise
1,240
$824.05
$1.02M
MOSLEY WILLIAM D
1 Sep 2026
CEO
Sold after exercise
600
$822.89
$493.73K
MOSLEY WILLIAM D
1 Sep 2026
CEO
Sold after exercise
480
$822.05
$394.58K
MOSLEY WILLIAM D
1 Sep 2026
CEO
Sold after exercise
920
$820.89
$755.22K
MOSLEY WILLIAM D
1 Sep 2026
CEO
Sold after exercise
1,320
$819.84
$1.08M
MOSLEY WILLIAM D
1 Sep 2026
CEO
Sold after exercise
1,040
$818.78
$851.53K
MOSLEY WILLIAM D
1 Sep 2026
CEO
Sold after exercise
2,080
$817.71
$1.70M
MOSLEY WILLIAM D
1 Sep 2026
CEO
Sold after exercise
4,287
$816.75
$3.50M
MOSLEY WILLIAM D
1 Sep 2026
CEO
Sold after exercise
4,555
$815.75
$3.72M
MOSLEY WILLIAM D
1 Sep 2026
CEO
Sold after exercise
2,878
$814.75
$2.34M
MOSLEY WILLIAM D
1 Sep 2026
CEO
Sold after exercise
2,040
$813.74
$1.66M
MOSLEY WILLIAM D
1 Sep 2026
CEO
Sold after exercise
1,200
$812.55
$975.06K
MOSLEY WILLIAM D
1 Sep 2026
CEO
Sold after exercise
1,578
$811.73
$1.28M
MOSLEY WILLIAM D
1 Sep 2026
CEO
Sold after exercise
1,105
$810.78
$895.92K
MOSLEY WILLIAM D
1 Sep 2026
CEO
Sold after exercise
1,160
$809.55
$939.08K
MOSLEY WILLIAM D
1 Sep 2026
CEO
Sold after exercise
960
$808.62
$776.28K
MOSLEY WILLIAM D
1 Sep 2026
CEO
Sold after exercise
160
$807.19
$129.15K
MOSLEY WILLIAM D
1 Sep 2026
CEO
Sold after exercise
160
$805.55
$128.89K
MOSLEY WILLIAM D
1 Sep 2026
CEO
Sold after exercise
357
$804.61
$287.25K
Lee James CI
24 Aug 2026
EVP & CLO
Sold after exercise
40
$816.96
$32.68K
Lee James CI
24 Aug 2026
EVP & CLO
Sold after exercise
40
$814.27
$32.57K
Lee James CI
24 Aug 2026
EVP & CLO
Sold after exercise
40
$812.72
$32.51K
Lee James CI
24 Aug 2026
EVP & CLO
Sold after exercise
120
$809.61
$97.15K
Lee James CI
24 Aug 2026
EVP & CLO
Sold after exercise
80
$804.87
$64.39K
Lee James CI
24 Aug 2026
EVP & CLO
Sold after exercise
440
$803.57
$353.57K
Lee James CI
24 Aug 2026
EVP & CLO
Sold after exercise
593
$802.67
$475.98K
Lee James CI
24 Aug 2026
EVP & CLO
Sold after exercise
200
$801.60
$160.32K
Lee James CI
24 Aug 2026
EVP & CLO
Sold after exercise
480
$800.42
$384.20K
Lee James CI
24 Aug 2026
EVP & CLO
Sold after exercise
567
$799.44
$453.28K
Lee James CI
24 Aug 2026
EVP & CLO
Sold after exercise
600
$798.49
$479.09K
Lee James CI
24 Aug 2026
EVP & CLO
Sold after exercise
600
$797.39
$478.43K
Lee James CI
24 Aug 2026
EVP & CLO
Sold after exercise
845
$795.90
$672.53K
Lee James CI
24 Aug 2026
EVP & CLO
Sold after exercise
968
$794.77
$769.34K
Lee James CI
24 Aug 2026
EVP & CLO
Sold after exercise
480
$793.66
$380.96K
Lee James CI
24 Aug 2026
EVP & CLO
Sold after exercise
120
$792.39
$95.09K
Lee James CI
24 Aug 2026
EVP & CLO
Sold after exercise
440
$791.80
$348.39K
Lee James CI
24 Aug 2026
EVP & CLO
Sold after exercise
280
$790.34
$221.30K
Lee James CI
24 Aug 2026
EVP & CLO
Sold after exercise
560
$789.25
$441.98K
Lee James CI
24 Aug 2026
EVP & CLO
Sold after exercise
200
$788.03
$157.61K
Lee James CI
24 Aug 2026
EVP & CLO
Sold after exercise
240
$786.27
$188.71K
Lee James CI
24 Aug 2026
EVP & CLO
Sold after exercise
120
$784.66
$94.16K
Lee James CI
24 Aug 2026
EVP & CLO
Sold after exercise
280
$783.28
$219.32K
Lee James CI
24 Aug 2026
EVP & CLO
Sold after exercise
280
$782.33
$219.05K
Lee James CI
24 Aug 2026
EVP & CLO
Sold after exercise
160
$780.66
$124.91K
Lee James CI
24 Aug 2026
EVP & CLO
Sold after exercise
80
$778.51
$62.28K
Lee James CI
24 Aug 2026
EVP & CLO
Sold after exercise
8
$777.05
$6.22K
Lee James CI
24 Aug 2026
EVP & CLO
Sold after exercise
112
$776.14
$86.93K
Lee James CI
24 Aug 2026
EVP & CLO
Sold after exercise
40
$774.84
$30.99K
Morris John Christopher
20 Aug 2026
EVP & CTO
Sold after exercise
523
$835.54
$436.99K
Teh Ban Seng
20 Aug 2026
EVP & Chief Commercial Officer
Sold after exercise
610
$852.66
$520.13K
Teh Ban Seng
20 Aug 2026
EVP & Chief Commercial Officer
Sold after exercise
630
$852.05
$536.79K
Teh Ban Seng
20 Aug 2026
EVP & Chief Commercial Officer
Sold after exercise
280
$850.41
$238.11K
Teh Ban Seng
20 Aug 2026
EVP & Chief Commercial Officer
Sold after exercise
400
$849.27
$339.71K
Teh Ban Seng
20 Aug 2026
EVP & Chief Commercial Officer
Sold after exercise
160
$847.42
$135.59K
Teh Ban Seng
20 Aug 2026
EVP & Chief Commercial Officer
Sold after exercise
320
$846.31
$270.82K
Teh Ban Seng
20 Aug 2026
EVP & Chief Commercial Officer
Sold after exercise
926
$845.03
$782.50K
Teh Ban Seng
20 Aug 2026
EVP & Chief Commercial Officer
Sold after exercise
40
$843.86
$33.75K
Teh Ban Seng
20 Aug 2026
EVP & Chief Commercial Officer
Sold after exercise
120
$843.24
$101.19K
Teh Ban Seng
20 Aug 2026
EVP & Chief Commercial Officer
Sold after exercise
160
$841.51
$134.64K
Teh Ban Seng
20 Aug 2026
EVP & Chief Commercial Officer
Sold after exercise
80
$839.94
$67.20K
Teh Ban Seng
20 Aug 2026
EVP & Chief Commercial Officer
Sold after exercise
120
$838.41
$100.61K
Teh Ban Seng
20 Aug 2026
EVP & Chief Commercial Officer
Sold after exercise
440
$837.22
$368.38K
Teh Ban Seng
20 Aug 2026
EVP & Chief Commercial Officer
Sold after exercise
682
$835.64
$569.90K
Teh Ban Seng
20 Aug 2026
EVP & Chief Commercial Officer
Sold after exercise
240
$834.59
$200.30K
Teh Ban Seng
20 Aug 2026
EVP & Chief Commercial Officer
Sold after exercise
280
$833.71
$233.44K
Teh Ban Seng
20 Aug 2026
EVP & Chief Commercial Officer
Sold after exercise
240
$831.85
$199.64K
Teh Ban Seng
20 Aug 2026
EVP & Chief Commercial Officer
Sold after exercise
80
$830.18
$66.41K
Teh Ban Seng
20 Aug 2026
EVP & Chief Commercial Officer
Sold after exercise
240
$829.77
$199.15K
Teh Ban Seng
13 Aug 2026
EVP & Chief Commercial Officer
Sold after exercise
1,359
$923.73
$1.26M
Teh Ban Seng
13 Aug 2026
EVP & Chief Commercial Officer
Sold after exercise
6,002
$920.14
$5.52M
Showing 250 of 1,063 transactions. The figures above use every one of them.

What was left out

Form 4 filings counted 705
Amendments (4/A) skipped 8
Filings about a different issuer 0
Unreadable filings 0
Joint filings 26
Sales on a Rule 10b5-1 plan 481
Sales straight out of an exercise 373
Sales at will 182
Transactions with no price 0
Shares from compensation/vesting 10,064,837
Sales filed before the plan box existed 130
History held since 30 Aug 2016