STX insider trading: Seagate Technology Holdings plc insider buys & sells · Whale Atlas

STX

Nasdaq

Seagate Technology Holdings plc

Latest disclosureOctober 2, 2026

Insider score Why 0?: 0/ 100
Qualifying buys · 30d: $0

0 purchases · 598 sales

Price by TradingView

Insider transactions 773

Limited filing history

Filters

Last 30 daysNo qualifying insider buying. Sales: $253.31M by 4 insiders.

Showing the first 6 of 20 trades on this page.

Sale disclosed

William D. Mosley

CEO

Ordinary Shares

Reported value: $334.44K
Reported price: $929.0089 / share

Sale disclosed

William D. Mosley

CEO

Ordinary Shares

Reported value: $795.18K
Reported price: $930.0334 / share

Why this buying score?

No qualifying common-equity purchases

No eligible common-equity purchase is public by this cutoff within 180 transaction-date days. Other instruments, exercises and routine activity do not contribute purchase points.

+0 pts

This score describes qualifying insider purchases at issuer level. Read the methodology

Sources and coverage

Source: SEC EDGAR · Form 4
Issuer CIK: 0001137789
Latest public acceptance: Oct 2, 2026, 08:07 PM UTC
Score calculated: Oct 7, 2026, 12:06 AM UTC
Parser: form4-parser-1.5
Classifier: form4-classifier-1.1
Scoring methodology: insider-experimental-1.1
Availability: Public filing time, not trade date

Open a transaction's SEC filing for the primary evidence. A code P may describe an open-market or private purchase; classification is not proof of intent.

Insider activity can have many explanations. Signal Strength is not a probability of profit or a recommendation to trade.

Sale disclosed

William D. Mosley

CEO

Ordinary Shares

Reported value: $598.5K
Reported price: $935.1494 / share

Sale disclosed

William D. Mosley

CEO

Ordinary Shares

Reported value: $710.75K
Reported price: $936.4299 / share

Sale disclosed

William D. Mosley

CEO

Ordinary Shares

Reported value: $542.71K
Reported price: $937.3285 / share

Sale disclosed

William D. Mosley

CEO

Ordinary Shares

Reported value: $600.52K
Reported price: $938.3194 / share

Sale disclosed

William D. Mosley

CEO

Ordinary Shares

Reported value: $676.27K
Reported price: $939.2706 / share

Sale disclosed

William D. Mosley

CEO

Ordinary Shares

Reported value: $75.22K
Reported price: $940.20 / share

Sale disclosed

William D. Mosley

CEO

Ordinary Shares

Reported value: $37.65K
Reported price: $941.22 / share

Sale disclosed

William D. Mosley

CEO

Ordinary Shares

Reported value: $264.1K
Reported price: $943.2129 / share

Sale disclosed

William D. Mosley

CEO

Ordinary Shares

Reported value: $415.71K
Reported price: $944.8064 / share

Sale disclosed

William D. Mosley

CEO

Ordinary Shares

Reported value: $910.02K
Reported price: $945.9696 / share

Exercise or conversion

William D. Mosley

CEO

Ordinary Shares

Value context: $647.22K
Reported price: $46.23 / share

Sale disclosed

William D. Mosley

CEO

Ordinary Shares

Reported value: $323.31K
Reported price: $898.0956 / share

Sale disclosed

William D. Mosley

CEO

Ordinary Shares

Reported value: $465.54K
Reported price: $900.4618 / share

Sale disclosed

William D. Mosley

CEO

Ordinary Shares

Reported value: $396.65K
Reported price: $901.4882 / share

Reporting insider	Security / transaction	Amount / price	Value	Traded / disclosed	Source
CEO	Ordinary SharesSale10b5-116 trades	11,002avg $935.60 / share	$10.29M	Oct 1Filed Oct 2 · 1d later	16 filings 360 @ $929.01 · $334.44KSEC filing 855 @ $930.03 · $795.18KSEC filing 1,665 @ $930.99 · $1.55MSEC filing 1,320 @ $932.04 · $1.23MSEC filing 840 @ $933.28 · $783.95KSEC filing 822 @ $934.35 · $768.04KSEC filing 640 @ $935.15 · $598.5KSEC filing 759 @ $936.43 · $710.75KSEC filing 579 @ $937.33 · $542.71KSEC filing 640 @ $938.32 · $600.52KSEC filing 720 @ $939.27 · $676.27KSEC filing 80 @ $940.20 · $75.22KSEC filing 40 @ $941.22 · $37.65KSEC filing 280 @ $943.21 · $264.1KSEC filing 440 @ $944.81 · $415.71KSEC filing 962 @ $945.97 · $910.02KSEC filing
CEO	Ordinary SharesOption exercise or conversion10b5-1	14,000$46.23 / share	$647.22K	Oct 1Filed Oct 2 · 1d later	SEC filing
CEO	Ordinary SharesSale10b5-13 trades	1,317avg $900.16 / share	$1.19M	Oct 1Filed Oct 2 · 1d later	3 filings 360 @ $898.10 · $323.31KSEC filing 517 @ $900.46 · $465.54KSEC filing 440 @ $901.49 · $396.65KSEC filing

Congress transactions 7

All Congress filings

Partial sale disclosed

Seagate Technology Holdings PLC - Ordinary Shares (STX) · Stock

The filing reports a partial sale for the member.

Kevin HernReporting House member

Reported amount: $1,001 – $15,000Reported range; exact amount not disclosed.
Trade date: September 15, 2026

Purchase disclosed

Seagate Technology Holdings PLC - Ordinary Shares (Ireland) · Stock

The filing reports a purchase for the member.

AAAlan ArmstrongReporting Senate member

Reported amount: $1,001 – $15,000Reported range; exact amount not disclosed.
Trade date: March 27, 2026

Sale disclosed

Seagate Technology Holdings PLC - Ordinary Shares (STX) · Stock

The filing reports a sale for a joint account.

Julie JohnsonReporting House member

Reported amount: $1,001 – $15,000Reported range; exact amount not disclosed.
Trade date: December 18, 2025

Partial sale disclosed

Seagate Technology Holdings PLC - Ordinary Shares (STX) · Stock

The filing reports a partial sale for a joint account.

Julie JohnsonReporting House member

Reported amount: $1,001 – $15,000Reported range; exact amount not disclosed.
Trade date: November 13, 2025

Partial sale disclosed

Seagate Technology Holdings PLC - Ordinary Shares (STX) · Stock

The filing reports a partial sale for the member.

Kevin HernReporting House member

Reported amount: $15,001 – $50,000Reported range; exact amount not disclosed.
Trade date: October 28, 2025

Partial sale disclosed

Seagate Technology Holdings PLC - Ordinary Shares (STX) · Stock

The filing reports a partial sale for the member.

Kevin HernReporting House member

Reported amount: $15,001 – $50,000Reported range; exact amount not disclosed.
Trade date: October 6, 2025

Purchase disclosed

Seagate Technology Holdings PLC - Ordinary Shares (STX) · Stock

The filing reports a purchase for a spouse.

Lisa McClainReporting House member

Reported amount: $15,001 – $50,000Reported range; exact amount not disclosed.
Trade date: September 8, 2025