STXSeagate Technology
Seagate is a leading provider of mass-capacity data storage, accelerating the world’s ability to harness the full value of data. 10-K, Item 1
- Employees
- 30,000
- Headquarters
- Singapore, U0
- CEO
- William D. Mosley
- Next results
- around Jan 26, 2027
What STX's directors and officers said they would sell, before they sold: trading plans the company reports each quarter, and the Form 144 notices sellers file on the day of a planned sale. Facts only; most of these sales are routine, such as selling shares from vesting stock awards.
Trading plans adopted or ended
10 plans still running: James C. Lee, Kian Fatt Chong, Prat S. Bhatt, Gianluca Romano, Dr. William D. Mosley, Ban Seng Teh, Dr. John C. Morris, Yolanda Conyers2.
| Insider | What | Date | Shares | Runs to | Reported in |
|---|---|---|---|---|---|
| James C. Lee Executive Vice President, Chief Legal Officer and Corporate Secretary |
Adopted 10b5-1 plan | Sep 2, 2026 | up to 12,595 | Aug 31, 2027 | 10-Q Oct 29, 2026 |
| Kian Fatt Chong Executive Vice President |
Adopted 10b5-1 plan | Aug 4, 2026 | up to 35,387 | Aug 4, 2027 | 10-Q Oct 29, 2026 |
| Prat S. Bhatt Director |
Adopted 10b5-1 plan | Jul 31, 2026 | up to 6,380 | Sep 10, 2027 | 10-Q Oct 29, 2026 |
| Gianluca Romano Executive Vice President and Chief Financial Officer |
Adopted 10b5-1 plan | Jul 30, 2026 | up to 77,020 | Sep 30, 2027 | 10-Q Oct 29, 2026 |
| Prat S. Bhatt Director |
Ended 10b5-1 plan | Jun 2, 2026 | not stated | – | 10-K Aug 4, 2026 |
| Gianluca Romano Executive Vice President and Chief Financial Officer |
Adopted 10b5-1 plan | Apr 30, 2026 | up to 72,709 | Dec 31, 2026 | 10-K Aug 4, 2026 |
| Prat S. Bhatt Director |
Adopted 10b5-1 plan | Mar 3, 2026 | up to 2,580 | May 31, 2027 | 10-Q Apr 29, 2026 |
| Dr. William D. Mosley Board Chair and Chief Executive Officer |
Adopted 10b5-1 plan | Feb 18, 2026 | up to 360,000 | Apr 30, 2027 | 10-Q Apr 29, 2026 |
| Ban Seng Teh Executive Vice President, Global Sales and Sales Operations |
Adopted 10b5-1 plan | Feb 11, 2026 | up to 54,366 | Feb 11, 2027 | 10-Q Apr 29, 2026 |
| Dr. John C. Morris Executive Vice President and Chief Technology Officer |
Adopted 10b5-1 plan | Jan 29, 2026 | up to 81,462 | May 7, 2027 | 10-Q Apr 29, 2026 |
| James C. Lee Executive Vice President, Chief Legal Officer and Corporate Secretary |
Adopted 10b5-1 plan | Jan 29, 2026 | up to 19,958 | Jan 29, 2027 | 10-Q Apr 29, 2026 |
| Gianluca Romano Executive Vice President and Chief Financial Officer |
Adopted 10b5-1 plan | Nov 26, 2025 | up to 24,390 | Jul 17, 2026 | 10-Q Jan 30, 2026 |
| James C. Lee Executive Vice President, Chief Legal Officer and Corporate Secretary |
Adopted 10b5-1 plan | Aug 12, 2025 | up to 4,948 | Jul 31, 2026 | 10-Q Oct 31, 2025 |
| Yolanda Conyers2 Director |
Adopted 10b5-1 plan | Aug 4, 2025 | up to 3,750 | Dec 31, 2026 | 10-Q Jan 30, 2026 |
| Gianluca Romano Executive Vice President and Chief Financial Officer |
Adopted 10b5-1 plan | Aug 1, 2025 | up to 62,023 | Dec 31, 2025 | 10-Q Oct 31, 2025 |
| Dr. John C. Morris Senior Vice President and Chief Technology Officer |
Adopted 10b5-1 plan | Jun 1, 2025 | up to 18,581 | Apr 20, 2026 | 10-K Aug 1, 2025 |
The company's descriptionThe table below summarizes the material terms of trading arrangements adopted by any of our executive officers or directors during the fiscal quarter ended June 27, 2025. All of the trading arrangements listed below are intended to satisfy the affirmative defense of Rule 10b5-1(c). Name Title Date of Adoption End Date¹ Aggregate number of ordinary shares to be sold pursuant to the trading agreement Dr. John C. Morris Senior Vice President and Chief Technology Officer June 1, 2025 April 20, 2026 18,581 ___________________________________ ¹ The plan will expire on the earlier of the end date or the completion of all transactions under the trading arrangement. | |||||
| David Mosley Chief Executive Officer |
Adopted 10b5-1 plan | Feb 20, 2025 | up to 394,347 | Apr 30, 2026 | 10-Q May 2, 2025 |
| Gianluca Romano Executive Vice President and Chief Financial Officer |
Adopted 10b5-1 plan | Jan 27, 2025 | up to 51,834 | Aug 29, 2025 | 10-Q May 2, 2025 |
| James C. Lee Senior Vice President, Chief Legal Officer and Corporate Secretary |
Adopted 10b5-1 plan | Jan 24, 2025 | up to 6,930 | Sep 30, 2025 | 10-Q May 2, 2025 |
| Ban Seng Teh EVP, Global Sales and Marketing |
Adopted 10b5-1 plan | Oct 31, 2024 | up to 113,684 | 220 days | 10-Q Jan 24, 2025 |
| Dr. William D. Mosley Chief Executive Officer |
Ended plan | Sep 11, 2024 | up to 452,048 | 468 days | 10-K Aug 4, 2023 |
| Gianluca Romano Executive Vice President and Chief Financial Officer |
Adopted 10b5-1 plan | Aug 23, 2024 | up to 68,954 | 220 days | 10-Q Oct 25, 2024 |
| Ban Seng Teh EVP, Chief Commercial Officer |
Ended plan | Jun 7, 2024 | up to 20,000 | 366 days | 10-K Aug 4, 2023 |
| Yolanda Conyers Director |
Adopted 10b5-1 plan | Jun 5, 2024 | up to 3,750 | – | 10-K Aug 2, 2024 |
| Dr. William D. Mosley Chief Executive Officer and Director |
Adopted 10b5-1 plan | May 6, 2024 | up to 476,132 | 359 days | 10-K Aug 2, 2024 |
| Gianluca Romano Executive Vice President and Chief Financial Officer |
Adopted 10b5-1 plan | May 1, 2024 | up to 25,760 | 244 days | 10-K Aug 2, 2024 |
| Gianluca Romano EVP and Chief Financial Officer |
Ended plan | Dec 15, 2023 | up to 40,177 | 203 days | 10-K Aug 4, 2023 |
| Katherine E. Schuelke SVP, Chief Legal Officer and Corporate Secretary |
Ended plan | Sep 29, 2023 | up to 262 | 121 days | 10-K Aug 4, 2023 |
From the XBRL of the company's 10-Qs and 10-Ks (Regulation S-K Item 408, reported since 2023): 15 filings checked since Apr 26, 2023.
Form 144 notices of planned sales
| Filed | Seller | Shares | Value | Shares came from | 10b5-1 plan | Form 4 sales after |
|---|---|---|---|---|---|---|
| Oct 23, 2026 | Lee James CI Officer |
600 | $379,785 | Restricted Stock Unit Vesting | none given | 547 shares from Oct 23, 2026 |
| Sep 21, 2026 | JOHN C MORRIS Officer |
14,849 | $12,752,173 | Exercise of Stock Options; Performance Stock Units; Restricted Stock Units | adopted Jan 29, 2026 | 9,354 shares from Sep 21, 2026 |
| Sep 15, 2026 | Morris John Christopher Officer |
16,239 | $12,538,790 | Performance Share Unit Vesting | none given | 24,820 shares from Sep 15, 2026 |
| Sep 15, 2026 | BAN SENG TEH Officer |
52,730 | $41,239,128 | Performance Shares | adopted Feb 11, 2026 | 52,730 shares from Sep 15, 2026 |
| Sep 15, 2026 | Romano Gianluca Officer |
52,483 | $40,524,881 | Performance Share Unit Vesting | none given | 49,984 shares from Sep 15, 2026 |
| Sep 15, 2026 | MOSLEY WILLIAM D Officer, Director |
102,784 | $79,363,745 | Performance Share Unit Vesting | none given | 127,889 shares from Sep 15, 2026 |
| Sep 14, 2026 | Morris John Christopher Officer |
518 | $404,405 | Restricted Stock Unit Vesting | none given | 25,312 shares from Sep 14, 2026 |
| Sep 14, 2026 | BAN SENG TEH Officer |
989 | $770,431 | Restricted Stock | adopted Feb 11, 2026 | 53,719 shares from Sep 14, 2026 |
| Sep 14, 2026 | Romano Gianluca Officer |
1,003 | $783,391 | Restricted Stock Unit Vesting | none given | 50,938 shares from Sep 14, 2026 |
| Sep 14, 2026 | MOSLEY WILLIAM D Officer, Director |
1,963 | $1,533,731 | Restricted Stock Unit Vesting | none given | 129,759 shares from Sep 14, 2026 |
| Sep 11, 2026 | GIANLUCA ROMANO Officer |
50,498 | $43,545,940 | Exercise of Stock Options | adopted Apr 30, 2026 | 101,436 shares from Sep 11, 2026 |
| Sep 10, 2026 | Morris John Christopher Officer |
601 | $518,022 | Restricted Stock Unit Vesting | none given | 25,884 shares from Sep 10, 2026 |
| Sep 10, 2026 | BAN SENG TEH Officer |
663 | $570,240 | Restricted Stock | adopted Feb 11, 2026 | 54,382 shares from Sep 10, 2026 |
| Sep 10, 2026 | Romano Gianluca Officer |
1,415 | $1,220,264 | Restricted Stock Unit Vesting | none given | 102,784 shares from Sep 10, 2026 |
| Sep 10, 2026 | MOSLEY WILLIAM D Officer, Director |
2,992 | $2,579,258 | Restricted Stock Unit Vesting | none given | 132,608 shares from Sep 10, 2026 |
| Sep 1, 2026 | WILLIAM D. MOSLEY Director, Officer |
90,000 | $74,554,200 | Exercise of Stock Options; Restricted and Performance Stock Units | adopted Feb 18, 2026 | 162,608 shares from Sep 1, 2026 |
| Sep 1, 2026 | YOLANDA CONYERS Director |
750 | $621,285 | Restricted Stock Units | adopted Aug 4, 2025 | 750 shares from Sep 1, 2026 |
| Aug 24, 2026 | JAMES LEE Officer |
9,013 | $7,661,050 | Exercise of Stock Options; Restricted Stock Units | adopted Jan 29, 2026 | 9,013 shares from Aug 24, 2026 |
| Aug 21, 2026 | Morris John Christopher Officer |
3,575 | $3,036,443 | Restricted Stock Unit Vesting | adopted Aug 20, 2026 | 20,046 shares from Aug 21, 2026 |
| Aug 21, 2026 | BAN SENG TEH Officer |
9,862 | $8,411,971 | Restricted Stock | adopted Feb 11, 2026 | 64,244 shares from Aug 21, 2026 |
| Aug 21, 2026 | Lee James CI Officer |
4,000 | $3,397,419 | Restricted Stock Unit Vesting | adopted Aug 20, 2026 | 12,952 shares from Aug 21, 2026 |
| Aug 21, 2026 | Romano Gianluca Officer |
9,135 | $7,758,856 | Restricted Stock Unit Vesting | adopted Aug 20, 2026 | 111,861 shares from Aug 21, 2026 |
| Aug 21, 2026 | MOSLEY WILLIAM D Officer, Director |
18,200 | $15,458,257 | Restricted Stock Unit Vesting | adopted Aug 20, 2026 | 150,747 shares from Aug 21, 2026 |
| Aug 20, 2026 | JOHN MORRIS Officer |
523 | $435,429 | Exercise of Stock Options | adopted Jan 29, 2026 | 20,569 shares from Aug 20, 2026 |
| Aug 20, 2026 | BAN SENG TEH Officer |
6,048 | $5,098,255 | Stock Option Exercise | adopted Feb 11, 2026 | 70,292 shares from Aug 20, 2026 |
| Aug 13, 2026 | BAN SENG TEH Officer |
7,361 | $6,778,028 | Employee Stock Purchase Plan; Restricted Stock; Stock Option Exercise | none given | 23,934 shares from Aug 13, 2026 |
| Aug 7, 2026 | GIANLUCA ROMANO Officer |
22,211 | $18,944,872 | Restricted stock units and performance stock units | adopted Apr 30, 2026 | 31,287 shares from Aug 7, 2026 |
| Jul 30, 2026 | JAMES LEE Officer |
694 | $530,514 | Restricted Stock Units | adopted Jan 29, 2026 | 13,646 shares from Jul 30, 2026 |
| Jul 23, 2026 | Lee James CI Officer |
543 | $490,741 | Restricted Stock Unit Vesting | none given | 5,175 shares from Jul 23, 2026 |
| Jun 12, 2026 | Morris John Christopher Officer |
466 | $404,530 | Restricted Stock Unit Vesting | none given | 1,364 shares from Jun 12, 2026 |
| Jun 12, 2026 | BAN SENG TEH Officer |
989 | $870,508 | Restricted Stock | adopted Feb 11, 2026 | 989 shares from Jun 12, 2026 |
| Jun 12, 2026 | Romano Gianluca Officer |
904 | $784,753 | Restricted Stock Unit Vesting | none given | 903 shares from Jun 12, 2026 |
| Jun 12, 2026 | MOSLEY WILLIAM D Officer, Director |
1,769 | $1,535,651 | Restricted Stock Unit Vesting | none given | 31,768 shares from Jun 12, 2026 |
| Jun 11, 2026 | Romano Gianluca Officer |
1,351 | $1,184,516 | Restricted Stock Unit Vesting | none given | 903 shares from Jun 12, 2026 |
| Jun 11, 2026 | MOSLEY WILLIAM D Officer, Director |
2,855 | $2,503,178 | Restricted Stock Unit Vesting | none given | 31,768 shares from Jun 12, 2026 |
| Jun 10, 2026 | Morris John Christopher Officer |
574 | $503,266 | Restricted Stock Unit Vesting | none given | 1,938 shares from Jun 10, 2026 |
| Jun 10, 2026 | BAN SENG TEH Officer |
663 | $544,893 | Restricted Stock | adopted Feb 11, 2026 | 1,652 shares from Jun 10, 2026 |
| Jun 4, 2026 | SHANKAR ARUMUGAVELU Director |
1,000 | $927,680 | Restricted Stock | none given | 1,000 shares from Jun 4, 2026 |
| Jun 2, 2026 | Pratik Bhatt Director |
1,000 | $921,260 | Restricted Stock Units | adopted Mar 3, 2026 | none found |
| Jun 1, 2026 | WILLIAM D. MOSLEY Director, Officer |
90,000 | $79,182,000 | Employee Stock Purchase Plan; Exercise of Stock Options; Restricted and Performance Stock Units | adopted Feb 18, 2026 | 64,623 shares from Jun 1, 2026 |
| May 20, 2026 | WILLIAM D. MOSLEY Director, Officer |
30,000 | $22,000,500 | Exercise of Stock Options; RSU & PSUs | adopted Feb 18, 2026 | 64,623 shares from May 20, 2026 |
| May 14, 2026 | BAN SENG TEH Officer |
8,003 | $6,540,725 | Stock Option Exercise | none given | 9,655 shares from May 14, 2026 |
| May 13, 2026 | BAN SENG TEH Officer |
7,557 | $6,147,254 | Performance and Restricted Stock | adopted Feb 11, 2026 | 17,212 shares from May 13, 2026 |
| May 6, 2026 | GIANLUCA ROMANO Officer |
24,390 | $18,804,934 | Performance Stock Units; Restricted Stock Units | adopted Nov 26, 2025 | 24,390 shares from May 6, 2026 |
| May 5, 2026 | STEPHANIE TILENIUS Director |
1,580 | $1,211,250 | Restricted stock vesting under a registered plan | none given | 1,580 shares from May 5, 2026 |
| May 4, 2026 | JOHN MORRIS Officer |
6,692 | $4,864,616 | Employee Stock Purchase Plan; Performance Stock Units; Restricted Stock Units | adopted Jan 29, 2026 | 5,626 shares from May 4, 2026 |
| May 4, 2026 | JAMES LEE Officer |
697 | $506,670 | Restricted Stock Units | adopted Jan 29, 2026 | 697 shares from May 4, 2026 |
| Apr 1, 2026 | WILLIAM MOSLEY Director, Officer |
20,000 | $7,835,200 | Employee Stock Purchase Plan; Performance Stock Units; Restricted Stock Units | adopted Feb 20, 2025 | none found |
| Mar 13, 2026 | JOHN MORRIS Officer |
112 | $41,886 | Restricted Stock Units | adopted Jun 1, 2025 | none found |
| Mar 2, 2026 | WILLIAM MOSLEY Director, Officer |
20,000 | $8,156,800 | Performance Stock Units | adopted Feb 20, 2025 | none found |
| Mar 2, 2026 | YOLANDA CONYERS Director |
1,500 | $611,760 | Restricted Stock Units | adopted Aug 4, 2025 | none found |
| Feb 24, 2026 | JOHN MORRIS Officer |
240 | $97,776 | Performance Stock Units | adopted Jun 1, 2025 | none found |
| Feb 23, 2026 | KIAN FATT CHONG Officer |
5,846 | $2,434,740 | Employee Stock Purchase Plan; Performance Shares; Restricted Stock | none given | none found |
| Feb 2, 2026 | WILLIAM MOSLEY Director, Officer |
20,000 | $8,153,800 | Restricted and Performance Stock Units | adopted Feb 20, 2025 | none found |
| Jan 29, 2026 | BAN SENG TEH Officer |
20,195 | $8,931,995 | Employee Stock Purchase Plan; Performance Shares; Restricted Stock; Stock Option Exercise | none given | none found |
| Jan 26, 2026 | JAMES LEE Officer |
673 | $232,925 | Restricted Stock Units | adopted Aug 12, 2025 | none found |
| Jan 12, 2026 | BAN SENG TEH Officer |
1,412 | $422,626 | Stock Option Exercise | adopted Oct 31, 2024 | none found |
| Jan 2, 2026 | WILLIAM MOSLEY Director, Officer |
20,000 | $5,507,800 | Performance Stock Units; Restricted Stock Units | adopted Feb 20, 2025 | none found |
| Dec 15, 2025 | JOHN MORRIS Officer |
113 | $32,503 | Restricted Stock Units | adopted Jun 1, 2025 | none found |
| Dec 11, 2025 | BAN SENG TEH Officer |
2,010 | $594,759 | Restricted Stock; Stock Option Exercise | adopted Oct 31, 2024 | none found |
| Dec 2, 2025 | YOLANDA CONYERS Director |
750 | $202,575 | Restricted Stock Units | adopted Aug 4, 2025 | none found |
| Dec 1, 2025 | WILLIAM MOSLEY Director, Officer |
20,000 | $5,533,800 | RSUs/PSUs | adopted Feb 20, 2025 | none found |
| Nov 12, 2025 | GIANLUCA ROMANO Officer |
62,023 | $17,862,624 | Exercise of Stock Options; Performance Stock Units; Restricted Stock Units | adopted Aug 1, 2025 | none found |
| Nov 12, 2025 | BAN SENG TEH Officer |
1,412 | $408,040 | Stock Option Exercise | adopted Oct 31, 2024 | none found |
| Nov 12, 2025 | JAMES LEE Officer |
697 | $204,911 | Restricted Stock Units | adopted Aug 12, 2025 | none found |
| Nov 10, 2025 | SHANKAR ARUMUGAVELU Director |
5,000 | $1,472,825 | Restricted Stock | none given | none found |
| Nov 5, 2025 | BAN SENG TEH Officer |
6,000 | $1,620,000 | Performance Shares | none given | none found |
| Nov 3, 2025 | WILLIAM MOSLEY Director, Officer |
20,000 | $5,117,600 | Performance Stock Units | adopted Feb 20, 2025 | none found |
| Nov 3, 2025 | STEPHANIE TILENIUS Director |
2,046 | $545,084 | Restricted stock vesting under a registered plan | none given | none found |
| Oct 31, 2025 | BRUNER JUDY Director |
8,886 | $2,385,000 | Stock Award | none given | none found |
| Oct 30, 2025 | KIAN FATT CHONG Officer |
7,078 | $1,926,209 | Employee Stock Purchase Plan; Performance Shares; Restricted Stock | none given | none found |
From the Form 144 XML filed with the SEC, since Oct 30, 2025. The value is the seller's estimate on the notice. "Form 4 sales after" matches the seller's Form 4 sales in the 30 days after the notice, by name; Form 4s go back 180 days.
Work on STX in a spreadsheet:
Excel workbook (a sheet per section, ten years by column, charts, links to the filings) ·
CSV.
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