Transaction · 0001137789-26-000261

MOSLEY WILLIAM D

MOSLEY WILLIAM D, CEO, reported an open-market or private sale at Seagate Technology Holdings plc involving 640.000000 shares for an estimated $593853.63. Reported holdings after the transaction were 373110.250000 shares. The stored filing text includes a detected 10b5-1 reference.

Open-market sellSEC transaction code SCEO
STXSeagate Technology Holdings plc
Filing timeOct 02
Trade dateOct 01, 2026
Filing · SECView on SEC
InsiderProfile
% of reported position traded0.17%Shares sold ÷ (holdings after + shares sold). Estimated position before: 373,750.25 shares.

Row-level estimate for this security and ownership context, not the insider’s complete portfolio. Joint ownership, other transactions in the filing, amendments and footnotes can affect interpretation.

Price performance since filing

Close on the filing date, the pre-filing context, and the forward return at standard windows
Price at filing
$848.99
Pre-filing
1mo ago -3.8%1w ago +6.7%1d ago +8.6%
Returns since
7d30d90d180d1y

STX price since this filing

30 days of pre-filing context and vertical markers at the filing date plus 7d / 30d / 90d / 180d / 1y afterwards
STX since 2026-10-02Filed today · pre-filing context shaded
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Filing datePost-filing windows (7d, 30d, 90d, 180d, 1y)30 days of pre-filing context

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
Sell
Code S
Identifier
0001137789-26-000261
Ordinary Shares
Transaction date
Oct 01, 2026
Filed Oct 02, 2026, 08:07 PM · 1d delay
Shares
640 sh
$927.90 per share
Estimated value
-$593k
Computed from shares × price
Holdings after
373k sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $100kLarge $1.00M
Cluster Selling Direct Ownership Repeat Seller 10b5-1 Detected
0score
Filing-only score

0

Compact filing score computed from stored Form 4 facts. Version v1.

Neutral filing signal

This filing is broadly neutral on the filing-only scale. The Form 4 facts do not strongly tilt positive or negative.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

CEO

Officer YesDirector Yes10% NoOther No
Footnotes & amended
  1. F1

    All transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 18, 2026.

  2. F2

    These Ordinary Shares were sold in multiple trades at prices ranging from $897.79 to $898.58. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes…

  3. F3

    These Ordinary Shares were sold in multiple trades at prices ranging from $899.96 to $900.87. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes…

  4. F4

    These Ordinary Shares were sold in multiple trades at prices ranging from $900.96 to $901.95. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes…

  5. F5

    These Ordinary Shares were sold in multiple trades at prices ranging from $901.97 to $902.93. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes…

  6. F6

    These Ordinary Shares were sold in multiple trades at prices ranging from $903.00 to $903.79. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes…

  7. F7

    These Ordinary Shares were sold in multiple trades at prices ranging from $904.00 to $904.95. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes…

  8. F8

    These Ordinary Shares were sold in multiple trades at prices ranging from $905.01 to $905.98. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes…

  9. F9

    These Ordinary Shares were sold in multiple trades at prices ranging from $906.06 to $906.98. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes…

  10. F10

    These Ordinary Shares were sold in multiple trades at prices ranging from $907.08 to $908.07. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes…

  11. F11

    These Ordinary Shares were sold in multiple trades at prices ranging from $908.16 to $909.15. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes…

  12. F12

    These Ordinary Shares were sold in multiple trades at prices ranging from $909.22 to $910.20. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes…

  13. F13

    These Ordinary Shares were sold in multiple trades at prices ranging from $910.22 to $911.20. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes…

  14. F14

    These Ordinary Shares were sold in multiple trades at prices ranging from $911.51 to $912.47. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes…

  15. F15

    These Ordinary Shares were sold in multiple trades at prices ranging from $912.54 to $913.53. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes…

  16. F16

    These Ordinary Shares were sold in multiple trades at prices ranging from $913.55 to $914.39. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes…

  17. F17

    These Ordinary Shares were sold in multiple trades at prices ranging from $914.56 to $915.52. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes…

  18. F18

    These Ordinary Shares were sold in multiple trades at prices ranging from $915.61 to $916.45. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes…

  19. F19

    These Ordinary Shares were sold in multiple trades at prices ranging from $917.02 to $917.62. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes…

  20. F20

    These Ordinary Shares were sold in multiple trades at prices ranging from $918.05 to $919.02. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes…

  21. F21

    These Ordinary Shares were sold in multiple trades at prices ranging from $919.07 to $920.03. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes…

  22. F22

    These Ordinary Shares were sold in multiple trades at prices ranging from $920.10 to $921.09. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes…

  23. F23

    These Ordinary Shares were sold in multiple trades at prices ranging from $921.15 to $922.08. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes…

  24. F24

    These Ordinary Shares were sold in multiple trades at prices ranging from $922.16 to $923.03. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes…

  25. F25

    These Ordinary Shares were sold in multiple trades at prices ranging from $923.19 to $924.18. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes…

  26. F26

    These Ordinary Shares were sold in multiple trades at prices ranging from $924.21 to $925.19. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes…

  27. F27

    These Ordinary Shares were sold in multiple trades at prices ranging from $925.27 to $926.22. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes…

  28. F28

    These Ordinary Shares were sold in multiple trades at prices ranging from $926.33 to $927.20. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes…

  29. F29

    These Ordinary Shares were sold in multiple trades at prices ranging from $927.41 to $928.36. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes…

  30. F30

    Options granted to the Reporting Person are subject to a four year vesting schedule. One quarter of the option shares vested on September 9, 2021. The remaining option shares vest in equal monthly ins…

Original filing · 0001137789-26-000261
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