MOSLEY WILLIAM D sold $1.5M of STX
MOSLEY WILLIAM D (CEO) sold 1,598 shares of Seagate Technology Holdings plc (STX) at $922.95 ($1.47M 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 incremental information about insider activity but does not, by itself, change Seagate’s fundamentals or forward outlook.
Market read
Traders may monitor for patterns in insider activity, but this single Form 4 is unlikely to drive a material repricing.
What to watch
The sale size is small relative to typical large-cap liquidity, and the disclosure does not indicate intent beyond the pre-arranged plan.
Background
SEC Form 4 reports insider transactions for Seagate Technology Holdings plc; this one is an open-market sale by the CEO under a pre-arranged 10b5-1 plan.
Ticker impact
Seagate CEO William D. Mosley sold $1.47M of STX shares in an open-market transaction under a pre-arranged 10b5-1 plan.
Low likelihood of sustained price impact; any effect is likely short-lived unless follow-on selling accelerates.
The filing is an ownership-change disclosure with a stated 10b5-1 plan, which typically reduces the signal of new negative information.
Market effects
Minimal; this is company-specific insider activity without sector-wide read-through.
None indicated.
None indicated.
Counterpoint
Even with a 10b5-1 plan, repeated insider selling can still be read as reduced confidence by some traders.
Key entities
- issuerSeagate Technology Holdings plc
STX; CEO William D. Mosley sold 1,598 shares for ~$1.47M under a 10b5-1 plan.


