Seagate Technology Holdings plc (STX) insider trading
No open-market insider purchases of Seagate Technology Holdings plc are on record; 13 open-market sales are.
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Insider purchases
No open-market purchases on record.
Insider sales
13 open-market sales on record
| Filed | Insider | Sold |
|---|---|---|
| Oct 26 Form 4 (opens sec.gov) |
James CI LeeOfficer · option shares | $351k 547 at $642.14 |
| Oct 2 Form 4 (opens sec.gov) |
William D. MosleyCEO · planned (10b5-1) | $10.3M 11,002 at $935.60 · 3% of holdings |
| Oct 2 Form 4 (opens sec.gov) |
William D. MosleyCEO · planned (10b5-1) | $17.4M 18,998 at $914.67 · 1% of holdings |
| Sep 22 Form 4 (opens sec.gov) |
John Christopher MorrisOfficer · planned (10b5-1) | $8.2M 9,354 at $877.91 · 27% of holdings |
| Sep 16 Form 4 (opens sec.gov) |
Gianluca RomanoCFO · option shares | $38.6M 49,984 at $772.16 |
| Sep 16 Form 4 (opens sec.gov) |
William D. MosleyCEO · option shares | $75.6M 97,889 at $772.14 |
| Sep 16 Form 4 (opens sec.gov) |
Ban Seng TehChief Commercial Officer · planned (10b5-1) · option shares | $41.2M 52,730 at $782.08 |
| Sep 16 Form 4 (opens sec.gov) |
John Christopher MorrisOfficer · option shares | $11.9M 15,466 at $772.15 |
| Sep 15 Form 4 (opens sec.gov) |
Ban Seng TehChief Commercial Officer · planned (10b5-1) · option shares | $770k 989 at $779.00 |
| Sep 15 Form 4 (opens sec.gov) |
John Christopher MorrisOfficer · option shares | $385k 493 at $781.23 |
| Sep 15 Form 4 (opens sec.gov) |
Gianluca RomanoCFO · planned (10b5-1) | $4.7M 5,555 at $841.95 · 11% of holdings |
| Sep 15 Form 4 (opens sec.gov) |
Gianluca RomanoCFO · planned (10b5-1) · option shares | $38.1M 45,898 at $830.01 |
| Sep 15 Form 4 (opens sec.gov) |
William D. MosleyCEO · option shares | $1.5M 1,870 at $781.23 |
Most insider sales are planned in advance or made for personal reasons, so a sale says less than a buy.
STX trades reported by members of Congress
| Reported | Member | Trade | Amount |
|---|---|---|---|
| Oct 28 |  Kevin HernR-OK · House5 days after the trade | Sale | $15K–$50K |
| Oct 12 |  Lisa McClainR-MI · House12 days after the trade | Sale | $15K–$50K |
| Sep 25 | Kevin HernR-OK · House10 days after the trade | Sale | $1K–$15K |
| Jul 21 |  Alan ArmstrongR-OK · Senate116 days after the trade | Buy | $1K–$15K |
Members of Congress report trades up to 45 days later, in dollar ranges. Every member's trades.
Planned insider sales of STX (Form 144)
| Filed | Insider | To sell |
|---|---|---|
| Oct 23 Form 144 | Lee James CIOfficer · no trading plan named | $380k 600 shares from Oct 23 |
A Form 144 is filed before an insider sells restricted or control shares; the Form 4 reports the sale once made.
Questions
Are insiders buying STX stock?
Not recently: no open-market purchases were filed in the last 90 days.
Who bought STX stock most recently?
No insider has bought STX on the open market in the filings on record.
How does InsiderBeacon score an insider buy?
Out of 100, from who bought, how much their stake grew, the size of the trade, whether other insiders bought within ten days, where the price sat in its 52-week range, and whether it was a first or a routine buy. The score is fixed when the filing arrives. The formula and the research behind it.
Data as of Oct 26, 2026, from SEC EDGAR Form 4 filings: open-market purchases (code P) of $25,000 or more, and open-market sales. Every row links to its filing. Scores summarise what a filing says (how the score works); outcomes are hypothetical, from the first close after the filing, and past results don't predict future ones. Disclaimer