Form 4 for STX Seagate Technology
Accepted 2026-09-16 16:10:16 ET · period of report 2026-09-14 · accession 0001137789-26-000251 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DT | 2026-09-16 16:10 | 2026-09-14 | STX | Teh Ban Seng | EVP, Chief Commercial Off | M - OptEx | $0.00 | +52.7K | 58.5K | +908% | $0 |
| DMT | 2026-09-16 16:10 | 2026-09-15 | STX | Teh Ban Seng | EVP, Chief Commercial Off | S - Sale+OE | $782.08 | -52.7K | 5,810 | -90% | -$41.24M |
| DT | 2026-09-16 16:10 | 2026-09-14 | STX | Teh Ban Seng | EVP, Chief Commercial Off | M - OptEx | $0.00 | -52.7K | 0 | -100% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Ordinary Shares | 2026-09-14 | M | A | 52,730 | $0.00 | 58,540 | D | — | — | (F1) Represents Ordinary Shares issued upon the vesting and settlement of Performance Share Units granted on September 11, 2023, following certification by the Compensation and People Committee of the achievement of the applicable performance conditions. |
| 2 | Common | Ordinary Shares | 2026-09-15 | S | D | 914 | $771.38 | 57,626 | D | — | — | (F2) All sale transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on Febuary 11, 2026. (F3) These Ordinary Shares were sold in multiple trades at prices ranging from $771.15 to $772.08. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| 3 | Common | Ordinary Shares | 2026-09-15 | S | D | 3,451 | $772.65 | 54,175 | D | — | — | (F4) These Ordinary Shares were sold in multiple trades at prices ranging from $772.19 to $773.14. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| 4 | Common | Ordinary Shares | 2026-09-15 | S | D | 1,717 | $774.01 | 52,458 | D | — | — | (F5) These Ordinary Shares were sold in multiple trades at prices ranging from $773.34 to $774.29. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| 5 | Common | Ordinary Shares | 2026-09-15 | S | D | 2,315 | $775.01 | 50,143 | D | — | — | (F6) These Ordinary Shares were sold in multiple trades at prices ranging from $774.71 to $775.70. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| 6 | Common | Ordinary Shares | 2026-09-15 | S | D | 3,242 | $776.20 | 46,901 | D | — | — | (F7) These Ordinary Shares were sold in multiple trades at prices ranging from $775.78 to $776.75. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| 7 | Common | Ordinary Shares | 2026-09-15 | S | D | 3,987 | $777.22 | 42,914 | D | — | — | (F8) These Ordinary Shares were sold in multiple trades at prices ranging from $776.80 to $777.76. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| 8 | Common | Ordinary Shares | 2026-09-15 | S | D | 7,259 | $778.35 | 35,655 | D | — | — | (F9) These Ordinary Shares were sold in multiple trades at prices ranging from $777.89 to $778.88. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| 9 | Common | Ordinary Shares | 2026-09-15 | S | D | 6,682 | $779.27 | 28,973 | D | — | — | (F10) These Ordinary Shares were sold in multiple trades at prices ranging from $778.95 to $779.94. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| 10 | Common | Ordinary Shares | 2026-09-15 | S | D | 2,453 | $780.29 | 26,520 | D | — | — | (F11) These Ordinary Shares were sold in multiple trades at prices ranging from $779.95 to $780.87. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| 11 | Common | Ordinary Shares | 2026-09-15 | S | D | 1,600 | $781.35 | 24,920 | D | — | — | (F12) These Ordinary Shares were sold in multiple trades at prices ranging from $780.99 to $781.88. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| 12 | Common | Ordinary Shares | 2026-09-15 | S | D | 4,147 | $782.56 | 20,773 | D | — | — | (F13) These Ordinary Shares were sold in multiple trades at prices ranging from $782.00 to $782.88. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| 13 | Common | Ordinary Shares | 2026-09-15 | S | D | 1,760 | $783.28 | 19,013 | D | — | — | (F14) These Ordinary Shares were sold in multiple trades at prices ranging from $783.00 to $783.78. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| 14 | Common | Ordinary Shares | 2026-09-15 | S | D | 1,000 | $784.45 | 18,013 | D | — | — | (F15) These Ordinary Shares were sold in multiple trades at prices ranging from $784.00 to $784.75. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| 15 | Common | Ordinary Shares | 2026-09-15 | S | D | 1,040 | $786.14 | 16,973 | D | — | — | (F16) These Ordinary Shares were sold in multiple trades at prices ranging from $785.75 to $786.61. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| 16 | Common | Ordinary Shares | 2026-09-15 | S | D | 120 | $787.26 | 16,853 | D | — | — | (F17) These Ordinary Shares were sold in multiple trades at prices ranging from $787.05 to $787.36. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| 17 | Common | Ordinary Shares | 2026-09-15 | S | D | 280 | $788.43 | 16,573 | D | — | — | |
| 18 | Common | Ordinary Shares | 2026-09-15 | S | D | 1,760 | $789.84 | 14,813 | D | — | — | (F18) These Ordinary Shares were sold in multiple trades at prices ranging from $789.56 to $790.43. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| 19 | Common | Ordinary Shares | 2026-09-15 | S | D | 560 | $791.36 | 14,253 | D | — | — | (F19) These Ordinary Shares were sold in multiple trades at prices ranging from $791.01 to $791.98. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| 20 | Common | Ordinary Shares | 2026-09-15 | S | D | 1,280 | $794.72 | 12,973 | D | — | — | (F20) These Ordinary Shares were sold in multiple trades at prices ranging from $794.18 to $794.99. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| 21 | Common | Ordinary Shares | 2026-09-15 | S | D | 2,166 | $795.95 | 10,807 | D | — | — | (F21) These Ordinary Shares were sold in multiple trades at prices ranging from $795.65 to $796.62. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| 22 | Common | Ordinary Shares | 2026-09-15 | S | D | 1,587 | $796.90 | 9,220 | D | — | — | (F22) These Ordinary Shares were sold in multiple trades at prices ranging from $796.68 to $797.48. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| 23 | Common | Ordinary Shares | 2026-09-15 | S | D | 530 | $797.97 | 8,690 | D | — | — | (F23) These Ordinary Shares were sold in multiple trades at prices ranging from $797.92 to $798.08. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| 24 | Common | Ordinary Shares | 2026-09-15 | S | D | 400 | $799.03 | 8,290 | D | — | — | (F24) These Ordinary Shares were sold in multiple trades at prices ranging from $799.02 to $799.03. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| 25 | Common | Ordinary Shares | 2026-09-15 | S | D | 2,480 | $800.47 | 5,810 | D | — | — | |
| 26 | Derivative | Performance-Based Restricted Share Units | 2026-09-14 | M | D | 52,730 | $0.00 | 0 | D | $0.00 · — to — | 52,730 Ordinary Shares | (F25) Performance Share Units granted on September 11, 2023 vested and were settled in Ordinary Shares upon certification of the applicable performance conditions by the Compensation and People Committee. (F25) Performance Share Units granted on September 11, 2023 vested and were settled in Ordinary Shares upon certification of the applicable performance conditions by the Compensation and People Committee. |