William D MosleyFiled
CEOExecutiveDirectorCIK 1388390
- STXSeagate Technology Holdings plcCEOfiled Sep 16, 2026
Net · 12 months
-$281.2M
Open-market buys − sales
Sold · 12 months
$281.2M
$171.4M in 90d · 369 sales on record
Bought · 12 months
$0
$0 in 90d · 0 buys on record
Under 10b5-1
61%
Share of sale value under a trading plan
Last trade
Sep 15, 2026
Filed Sep 16, 2026 · 507 rows
Monthly open-market value · 24 months Filed
- Bought (open market)
- Sold (open market)
Unusual activity Estimated
Whale score 98Whale watch
- 58Exec saleSep 15, 2026
STX CEO William D Mosley sold $75.6M
Details
- Insider
- William D Mosley
- Company
- Seagate Technology Holdings plc
- Ticker
- STX
- Tx kind
- open_market_sale
- Tx date
- Sep 15, 2026
- Shares
- 97,889.25
- Price
- $772
- Value
- $75.6M
- Is 10b5 1
- No
- 44Exec saleAug 21, 2026
STX CEO William D Mosley sold $9.6M
Details
- Insider
- William D Mosley
- Company
- Seagate Technology Holdings plc
- Ticker
- STX
- Tx kind
- open_market_sale
- Tx date
- Aug 21, 2026
- Shares
- 11,308
- Price
- $849
- Value
- $9.6M
- Is 10b5 1
- No
- 65Insider overlapMar 27, 2026
Sen. Alan Armstrong bought STX 5 days before its CEO sold $1.2M
Details
- Politician
- Alan Armstrong
- Ticker
- STX
- Asset
- Seagate Technology Holdings PLC - Ordinary Shares (Ireland)
- Tx type
- buy
- Tx date
- Mar 27, 2026
- Filing date
- Jul 21, 2026
- Amount low
- $1,001
- Amount high
- $15,000
- Amount mid
- $8,001
- Disclosed range
- $1,001 - $15,000
- Reporting lag days
- 116
- Is whale
- No
- Insider trade
- {"insider":{"slug":"william-d-mosley","name":"William D Mosley","title":"CEO","short_title":"CEO"},"company":"Seagate Technology Holdings plc","ticker":"STX","tx_kind":"open_market_sale","tx_date":"2026-04-01","shares":2900,"price":420.7721,"value":1220239.09,"is_10b5_1":true}
- Days between
- -5
- Opposite side
- Yes
- 45Exec saleMar 19, 2026
STX CEO William D Mosley sold $10M
Details
- Insider
- William D Mosley
- Company
- Seagate Technology Holdings plc
- Ticker
- STX
- Tx kind
- open_market_sale
- Tx date
- Mar 19, 2026
- Shares
- 24,584
- Price
- $407
- Value
- $10M
- Is 10b5 1
- No
- 50Insider overlapDec 18, 2025
Rep. Julie Johnson sold STX 15 days before its CEO sold $1.4M
Details
- Politician
- Julie Johnson
- Ticker
- STX
- Asset
- Seagate Technology Holdings PLC - Ordinary Shares (STX)
- Tx type
- sell
- Tx date
- Dec 18, 2025
- Filing date
- Jan 15, 2026
- Amount low
- $1,001
- Amount high
- $15,000
- Amount mid
- $8,001
- Disclosed range
- $1,001 - $15,000
- Reporting lag days
- 28
- Is whale
- No
- Insider trade
- {"insider":{"slug":"william-d-mosley","name":"William D Mosley","title":"CEO","short_title":"CEO"},"company":"Seagate Technology Holdings plc","ticker":"STX","tx_kind":"open_market_sale","tx_date":"2026-01-02","shares":5009,"price":287.2739,"value":1438954.97,"is_10b5_1":true}
- Days between
- -15
- Opposite side
- No
- 50Insider overlapNov 13, 2025
Rep. Julie Johnson partially sold STX 10 days after its CEO sold $1.5M
Details
- Politician
- Julie Johnson
- Ticker
- STX
- Asset
- Seagate Technology Holdings PLC - Ordinary Shares (STX)
- Tx type
- partial_sale
- Tx date
- Nov 13, 2025
- Filing date
- Dec 11, 2025
- Amount low
- $1,001
- Amount high
- $15,000
- Amount mid
- $8,001
- Disclosed range
- $1,001 - $15,000
- Reporting lag days
- 28
- Is whale
- No
- Insider trade
- {"insider":{"slug":"william-d-mosley","name":"William D Mosley","title":"CEO","short_title":"CEO"},"company":"Seagate Technology Holdings plc","ticker":"STX","tx_kind":"open_market_sale","tx_date":"2025-11-03","shares":5506,"price":266.2473,"value":1465957.63,"is_10b5_1":true}
- Days between
- 10
- Opposite side
- No
- 50Insider overlapOct 28, 2025
Rep. Kevin Hern partially sold STX 6 days before its CEO sold $1.5M
Details
- Politician
- Kevin Hern
- Ticker
- STX
- Asset
- Seagate Technology Holdings PLC - Ordinary Shares (STX)
- Tx type
- partial_sale
- Tx date
- Oct 28, 2025
- Filing date
- Nov 16, 2025
- Amount low
- $15,001
- Amount high
- $50,000
- Amount mid
- $32,501
- Disclosed range
- $15,001 - $50,000
- Reporting lag days
- 19
- Is whale
- No
- Insider trade
- {"insider":{"slug":"william-d-mosley","name":"William D Mosley","title":"CEO","short_title":"CEO"},"company":"Seagate Technology Holdings plc","ticker":"STX","tx_kind":"open_market_sale","tx_date":"2025-11-03","shares":5506,"price":266.2473,"value":1465957.63,"is_10b5_1":true}
- Days between
- -6
- Opposite side
- No
- 50Insider overlapOct 6, 2025
Rep. Kevin Hern partially sold STX 5 days after its CEO sold $998K
Details
- Politician
- Kevin Hern
- Ticker
- STX
- Asset
- Seagate Technology Holdings PLC - Ordinary Shares (STX)
- Tx type
- partial_sale
- Tx date
- Oct 6, 2025
- Filing date
- Nov 16, 2025
- Amount low
- $15,001
- Amount high
- $50,000
- Amount mid
- $32,501
- Disclosed range
- $15,001 - $50,000
- Reporting lag days
- 41
- Is whale
- No
- Insider trade
- {"insider":{"slug":"william-d-mosley","name":"William D Mosley","title":"CEO","short_title":"CEO"},"company":"Seagate Technology Holdings plc","ticker":"STX","tx_kind":"open_market_sale","tx_date":"2025-10-01","shares":3885,"price":256.8806,"value":997981.13,"is_10b5_1":true}
- Days between
- 5
- Opposite side
- No
- 65Insider overlapSep 8, 2025
Rep. Lisa C. McClain bought STX 6 days after its CEO sold $1.2M
Details
- Politician
- Lisa C. McClain
- Ticker
- STX
- Asset
- Seagate Technology Holdings PLC - Ordinary Shares (STX)
- Tx type
- buy
- Tx date
- Sep 8, 2025
- Filing date
- Oct 22, 2025
- Amount low
- $15,001
- Amount high
- $50,000
- Amount mid
- $32,501
- Disclosed range
- $15,001 - $50,000
- Reporting lag days
- 44
- Is whale
- No
- Insider trade
- {"insider":{"slug":"william-d-mosley","name":"William D Mosley","title":"CEO","short_title":"CEO"},"company":"Seagate Technology Holdings plc","ticker":"STX","tx_kind":"open_market_sale","tx_date":"2025-09-02","shares":7000,"price":170.1923,"value":1191346.1,"is_10b5_1":true}
- Days between
- 6
- Opposite side
- Yes
- 50Insider overlapAug 14, 2025
Rep. Julie Johnson partially sold STX 13 days after its CEO sold $1.3M
Details
- Politician
- Julie Johnson
- Ticker
- STX
- Asset
- Seagate Technology Holdings PLC - Ordinary Shares (STX)
- Tx type
- partial_sale
- Tx date
- Aug 14, 2025
- Filing date
- Sep 11, 2025
- Amount low
- $1,001
- Amount high
- $15,000
- Amount mid
- $8,001
- Disclosed range
- $1,001 - $15,000
- Reporting lag days
- 28
- Is whale
- No
- Insider trade
- {"insider":{"slug":"william-d-mosley","name":"William D Mosley","title":"CEO","short_title":"CEO"},"company":"Seagate Technology Holdings plc","ticker":"STX","tx_kind":"open_market_sale","tx_date":"2025-08-01","shares":8311,"price":153.6719,"value":1277167.16,"is_10b5_1":true}
- Days between
- 13
- Opposite side
- No
Transactions
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