As of the latest Form 4 filed Jul 2, 2026.
What Seagate Technology PLC insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 119 most recent filings for STX.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D CEO | SSale | −3.00 | $936.36 | $2.81K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −200.00 | $934.45 | $187K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −320.00 | $932.94 | $299K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −120.00 | $931.62 | $112K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −280.00 | $930.10 | $260K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −320.00 | $929.11 | $297K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −620.00 | $928.10 | $575K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −571.00 | $927.00 | $529K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −1.02K | $926.17 | $944K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −770.00 | $925.03 | $712K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −1.16K | $923.83 | $1.07M | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −720.00 | $922.68 | $664K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −880.00 | $921.80 | $811K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −880.00 | $920.57 | $810K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −1.48K | $919.64 | $1.36M | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D CEO | SSale | −2.06K | $918.67 | $1.90M | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −1.76K | $917.67 | $1.62M | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −1.19K | $916.61 | $1.09M | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −2.31K | $915.65 | $2.11M | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −2.38K | $914.77 | $2.18M | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −1.60K | $913.65 | $1.46M | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −813.00 | $912.72 | $742K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −960.00 | $911.63 | $875K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −399.00 | $910.49 | $363K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −441.00 | $909.52 | $401K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −560.00 | $908.42 | $509K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −391.00 | $907.56 | $355K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −609.00 | $906.47 | $552K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −320.00 | $905.12 | $290K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −720.00 | $904.36 | $651K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −560.00 | $903.08 | $506K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −320.00 | $902.14 | $289K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −401.00 | $900.82 | $361K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −308.00 | $900.05 | $277K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −300.00 | $898.79 | $270K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −340.00 | $897.78 | $305K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −400.00 | $896.78 | $359K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −254.00 | $895.66 | $227K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −266.00 | $894.39 | $238K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −40.00 | $892.93 | $35.7K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −200.00 | $892.08 | $178K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −120.00 | $891.13 | $107K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −320.00 | $890.02 | $285K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | SSale | −320.00 | $887.97 | $284K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-07-01 | MOSLEY WILLIAM D, CEO | MExercise | +14.0K | $46.23 | $647K | Yes (planned) | Form 4 ↗ |
| 2026-06-15 | 2026-06-12 | Morris John Christopher EVP & CTO | SSale | −898.00 | $880.19 | $790K | Yes (planned) | Form 4 ↗ |
| 2026-06-15 | 2026-06-12 | Morris John Christopher, EVP & CTO | SSale | −466.00 | $880.19 | $410K | Yes (planned) | Form 4 ↗ |
| 2026-06-15 | 2026-06-12 | Teh Ban Seng EVP & Chief Commercial Officer | SSale | −989.00 | $880.19 | $871K | Yes (planned) | Form 4 ↗ |
| 2026-06-15 | 2026-06-12 | Romano Gianluca EVP & CFO | SSale | −903.25 | $880.19 | $795K | No | Form 4 ↗ |
| 2026-06-15 | 2026-06-12 | MOSLEY WILLIAM D CEO | SSale | −1.77K | $880.19 | $1.56M | No | Form 4 ↗ |
| 2026-06-15 | 2026-06-11 | Morris John Christopher EVP & CTO | MExercise | +942.00 | $0.00 | $0.00 | Yes (planned) | Form 4 ↗ |
| 2026-06-15 | 2026-06-11 | Teh Ban Seng EVP & Chief Commercial Officer | MExercise | +989.00 | $0.00 | $0.00 | Yes (planned) | Form 4 ↗ |
| 2026-06-15 | 2026-06-11 | Chong Kian Fatt EVP Global Operations | MExercise | +678.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-15 | 2026-06-11 | Romano Gianluca EVP & CFO | MExercise | +1.70K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-15 | 2026-06-11 | MOSLEY WILLIAM D CEO | MExercise | +3.32K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-11 | 2026-06-10 | Teh Ban Seng EVP & Chief Commercial Officer | SSale | −663.00 | $821.86 | $545K | Yes (planned) | Form 4 ↗ |
| 2026-06-11 | 2026-06-10 | Morris John Christopher EVP & CTO | SSale | −319.75 | $821.65 | $263K | No | Form 4 ↗ |
| 2026-06-11 | 2026-06-10 | Morris John Christopher, EVP & CTO | SSale | −254.00 | $821.66 | $209K | No | Form 4 ↗ |
| 2026-06-11 | 2026-06-10 | MOSLEY WILLIAM D CEO | SSale | −1.32K | $821.75 | $1.08M | No | Form 4 ↗ |
| 2026-06-11 | 2026-06-10 | MOSLEY WILLIAM D, CEO | SSale | −1.54K | $821.74 | $1.26M | No | Form 4 ↗ |
| 2026-06-11 | 2026-06-10 | Romano Gianluca EVP & CFO | SSale | −827.00 | $821.77 | $680K | No | Form 4 ↗ |
| 2026-06-11 | 2026-06-10 | Romano Gianluca, EVP & CFO | SSale | −523.50 | $821.73 | $430K | No | Form 4 ↗ |
| 2026-06-11 | 2026-06-09 | Chong Kian Fatt EVP Global Operations | MExercise | +379.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-11 | 2026-06-09 | Chong Kian Fatt, EVP Global Operations | MExercise | +202.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-11 | 2026-06-09 | Teh Ban Seng EVP & Chief Commercial Officer | MExercise | +663.00 | $0.00 | $0.00 | Yes (planned) | Form 4 ↗ |
| 2026-06-11 | 2026-06-09 | Teh Ban Seng, EVP & Chief Commercial Officer | MExercise | +599.00 | $0.00 | $0.00 | Yes (planned) | Form 4 ↗ |
| 2026-06-11 | 2026-06-09 | Morris John Christopher EVP & CTO | MExercise | +631.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-11 | 2026-06-09 | Morris John Christopher, EVP & CTO | MExercise | +499.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-11 | 2026-06-09 | MOSLEY WILLIAM D CEO | MExercise | +2.42K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-11 | 2026-06-09 | MOSLEY WILLIAM D, CEO | MExercise | +2.81K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-11 | 2026-06-09 | Romano Gianluca EVP & CFO | MExercise | +1.51K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-11 | 2026-06-09 | Romano Gianluca, EVP & CFO | MExercise | +959.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-04 | 2026-06-04 | Arumugavelu Shankar Director | SSale | −1.00K | $927.68 | $928K | No | Form 4 ↗ |
| 2026-05-14 | 2026-05-14 | Teh Ban Seng EVP & Chief Commercial Officer | SSale | −8.00K | $817.28 | $6.54M | Yes (planned) | Form 4 ↗ |
| 2026-05-14 | 2026-05-14 | Teh Ban Seng, EVP & Chief Commercial Officer | MExercise | +2.13K | $68.83 | $147K | Yes (planned) | Form 4 ↗ |
| 2026-05-14 | 2026-05-14 | Teh Ban Seng, EVP & Chief Commercial Officer | MExercise | +2.36K | $101.34 | $239K | Yes (planned) | Form 4 ↗ |
| 2026-05-14 | 2026-05-14 | Teh Ban Seng, EVP & Chief Commercial Officer | MExercise | +3.52K | $64.31 | $226K | Yes (planned) | Form 4 ↗ |
| 2026-05-14 | 2026-05-13 | Teh Ban Seng, EVP & Chief Commercial Officer | SSale | −1.57K | $830.75 | $1.30M | Yes (planned) | Form 4 ↗ |
| 2026-05-14 | 2026-05-13 | Teh Ban Seng, EVP & Chief Commercial Officer | SSale | −80.00 | $827.50 | $66.2K | Yes (planned) | Form 4 ↗ |
| 2026-05-14 | 2026-05-13 | Teh Ban Seng, EVP & Chief Commercial Officer | SSale | −80.00 | $824.96 | $66.0K | Yes (planned) | Form 4 ↗ |
| 2026-05-14 | 2026-05-13 | Teh Ban Seng, EVP & Chief Commercial Officer | SSale | −40.00 | $822.19 | $32.9K | Yes (planned) | Form 4 ↗ |
| 2026-05-14 | 2026-05-13 | Teh Ban Seng, EVP & Chief Commercial Officer | SSale | −320.00 | $821.29 | $263K | Yes (planned) | Form 4 ↗ |
| 2026-05-14 | 2026-05-13 | Teh Ban Seng, EVP & Chief Commercial Officer | SSale | −40.00 | $819.51 | $32.8K | Yes (planned) | Form 4 ↗ |
| 2026-05-14 | 2026-05-13 | Teh Ban Seng, EVP & Chief Commercial Officer | SSale | −200.00 | $818.63 | $164K | Yes (planned) | Form 4 ↗ |
| 2026-05-14 | 2026-05-13 | Teh Ban Seng, EVP & Chief Commercial Officer | SSale | −160.00 | $817.23 | $131K | Yes (planned) | Form 4 ↗ |
| 2026-05-14 | 2026-05-13 | Teh Ban Seng, EVP & Chief Commercial Officer | SSale | −80.00 | $815.51 | $65.2K | Yes (planned) | Form 4 ↗ |
| 2026-05-14 | 2026-05-13 | Teh Ban Seng, EVP & Chief Commercial Officer | SSale | −200.00 | $814.26 | $163K | Yes (planned) | Form 4 ↗ |
| 2026-05-14 | 2026-05-13 | Teh Ban Seng, EVP & Chief Commercial Officer | SSale | −285.00 | $813.47 | $232K | Yes (planned) | Form 4 ↗ |
| 2026-05-14 | 2026-05-13 | Teh Ban Seng, EVP & Chief Commercial Officer | SSale | −272.00 | $812.20 | $221K | Yes (planned) | Form 4 ↗ |
| 2026-05-14 | 2026-05-13 | Teh Ban Seng, EVP & Chief Commercial Officer | SSale | −351.00 | $810.57 | $285K | Yes (planned) | Form 4 ↗ |
| 2026-05-14 | 2026-05-13 | Teh Ban Seng, EVP & Chief Commercial Officer | SSale | −607.00 | $809.63 | $491K | Yes (planned) | Form 4 ↗ |
| 2026-05-14 | 2026-05-13 | Teh Ban Seng, EVP & Chief Commercial Officer | SSale | −429.00 | $808.60 | $347K | Yes (planned) | Form 4 ↗ |
| 2026-05-14 | 2026-05-13 | Teh Ban Seng, EVP & Chief Commercial Officer | SSale | −120.00 | $807.31 | $96.9K | Yes (planned) | Form 4 ↗ |
| 2026-05-14 | 2026-05-13 | Teh Ban Seng, EVP & Chief Commercial Officer | SSale | −400.00 | $805.99 | $322K | Yes (planned) | Form 4 ↗ |
| 2026-05-14 | 2026-05-13 | Teh Ban Seng, EVP & Chief Commercial Officer | SSale | −509.00 | $804.71 | $410K | Yes (planned) | Form 4 ↗ |
| 2026-05-14 | 2026-05-13 | Teh Ban Seng, EVP & Chief Commercial Officer | SSale | −676.00 | $803.76 | $543K | Yes (planned) | Form 4 ↗ |
| 2026-05-14 | 2026-05-13 | Teh Ban Seng, EVP & Chief Commercial Officer | SSale | −419.00 | $802.67 | $336K | Yes (planned) | Form 4 ↗ |
| 2026-05-14 | 2026-05-13 | Teh Ban Seng, EVP & Chief Commercial Officer | SSale | −200.00 | $801.39 | $160K | Yes (planned) | Form 4 ↗ |
| 2026-05-14 | 2026-05-13 | Teh Ban Seng, EVP & Chief Commercial Officer | SSale | −520.00 | $800.26 | $416K | Yes (planned) | Form 4 ↗ |
| 2026-05-06 | 2026-05-05 | Tilenius Stephanie Director | SSale | −40.00 | $767.33 | $30.7K | No | Form 4 ↗ |
| 2026-05-06 | 2026-05-05 | Tilenius Stephanie, Director | SSale | −1.54K | $766.60 | $1.18M | No | Form 4 ↗ |
| 2026-05-06 | 2026-05-04 | Morris John Christopher EVP & CTO | SSale | −40.00 | $748.14 | $29.9K | Yes (planned) | Form 4 ↗ |
| 2026-05-06 | 2026-05-04 | Morris John Christopher, EVP & CTO | SSale | −120.00 | $745.64 | $89.5K | Yes (planned) | Form 4 ↗ |
| 2026-05-06 | 2026-05-04 | Morris John Christopher, EVP & CTO | SSale | −80.00 | $744.52 | $59.6K | Yes (planned) | Form 4 ↗ |
| 2026-05-06 | 2026-05-04 | Morris John Christopher, EVP & CTO | SSale | −248.00 | $743.46 | $184K | Yes (planned) | Form 4 ↗ |
| 2026-05-06 | 2026-05-04 | Morris John Christopher, EVP & CTO | SSale | −398.00 | $742.47 | $296K | Yes (planned) | Form 4 ↗ |
| 2026-05-06 | 2026-05-04 | Morris John Christopher, EVP & CTO | SSale | −615.00 | $740.93 | $456K | Yes (planned) | Form 4 ↗ |
| 2026-05-06 | 2026-05-04 | Morris John Christopher, EVP & CTO | SSale | −631.00 | $739.94 | $467K | Yes (planned) | Form 4 ↗ |
| 2026-05-06 | 2026-05-04 | Morris John Christopher, EVP & CTO | SSale | −427.00 | $738.79 | $315K | Yes (planned) | Form 4 ↗ |
| 2026-05-06 | 2026-05-04 | Morris John Christopher, EVP & CTO | SSale | −800.00 | $737.77 | $590K | Yes (planned) | Form 4 ↗ |
| 2026-05-06 | 2026-05-04 | Morris John Christopher, EVP & CTO | SSale | −734.00 | $736.81 | $541K | Yes (planned) | Form 4 ↗ |
| 2026-05-06 | 2026-05-04 | Morris John Christopher, EVP & CTO | SSale | −520.00 | $735.69 | $383K | Yes (planned) | Form 4 ↗ |
| 2026-05-06 | 2026-05-04 | Morris John Christopher, EVP & CTO | SSale | −613.00 | $734.86 | $450K | Yes (planned) | Form 4 ↗ |
| 2026-05-06 | 2026-05-04 | Morris John Christopher, EVP & CTO | SSale | −240.00 | $733.67 | $176K | Yes (planned) | Form 4 ↗ |
| 2026-05-06 | 2026-05-04 | Morris John Christopher, EVP & CTO | SSale | −160.00 | $731.65 | $117K | Yes (planned) | Form 4 ↗ |
| 2026-05-06 | 2026-05-04 | Lee James CI EVP & CLO | SSale | −697.00 | $741.17 | $517K | Yes (planned) | Form 4 ↗ |
| 2026-04-23 | 2026-04-22 | Lee James CI EVP & CLO | FTax | −540.00 | $579.88 | $313K | No | Form 4 ↗ |
| 2026-04-23 | 2026-04-22 | Lee James CI, EVP & CLO | MExercise | +1.24K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-23 | 2026-03-19 | MOSLEY WILLIAM D CEO | SSale | −24.6K | $406.77 | $10.0M | No | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also STX’s full analysis or the market-wide insider trading feed. The tabs above jump to STX’s other SEC data.
Source: SEC Form 4 filings for STX, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
Research and education only — not financial advice. TENKis not a registered investment adviser or broker-dealer and gives no personalized advice. Every call is impersonal — identical for all users, generated on a schedule from SEC filings plus a delayed/third-party price feed — may be wrong or out of date, and is not a recommendation to buy or sell any security. The operator and an affiliated trading operation may hold or trade the securities TENK rates; see Disclosures. Past performance does not guarantee future results. Do your own research.