MOSLEY WILLIAM D sold $251K of STX
MOSLEY WILLIAM D (CEO) sold 280 shares of Seagate Technology Holdings plc (STX) at $897.43 ($0.25M total) on 2026-06-01 under a Rule 10b5-1 trading plan.
How this was made
The 30-second read
Why it matters
The disclosure provides a datapoint on insider activity but does not, by itself, indicate a change in business outlook.
Market read
Traders may monitor insider activity, but this specific transaction is unlikely to drive a sustained repricing given the 10b5-1 structure.
What to watch
The sale size is small relative to typical large-cap liquidity, and 10b5-1 plans are designed to be non-informational; sentiment impact may be overstated.
Background
SEC Form 4 reports insider transactions; Rule 10b5-1 plans are pre-arranged trades intended to limit timing-based information concerns.
Ticker impact
Seagate CEO William D. Mosley sold 280 shares in an open-market transaction disclosed via SEC Form 4 on June 1, 2026.
Likely minimal price impact; any reaction is expected to be short-lived unless accompanied by other company-specific news.
The filing specifies a Rule 10b5-1 pre-arranged plan, reducing the likelihood the sale reflects new negative information.
Market effects
No direct sector read-through; this is company-specific insider transaction disclosure.
None indicated.
None indicated.
Counterpoint
Even with a 10b5-1 plan, repeated insider selling can be interpreted by some traders as reduced confidence, especially if paired with other negative signals.
Key entities
- insiderMOSLEY WILLIAM D
Seagate CEO and officer/director who sold 280 shares under a pre-arranged 10b5-1 plan.
- issuerSeagate Technology Holdings plc
STX; insider sale disclosed via SEC Form 4 (open-market sale, June 1, 2026).


