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Investment Visual

STX

Seagate Technology Holdings plc

$528.29−16.85 (−3.09%)Close Nov 13, 2026

Backtest STX

Insider trading

12 months to Nov 3, 2026
Sold
$607M
11 insiders
Largest seller
$317M
William D. Mosley · 52% of sales
Plan sales
$401M
66% of sales
Latest buy
Oct 7, 2021
Ravi Naik

Buys and sales on the price

Since 2003

By period

Open-market trades
Trades3 months12 monthsSince 2003
Buys0033
Sales35881,133
Plan sales2158604
Shares bought00008,778,5688.78M
Shares sold469,319469K884,534885K1,602,305,6071.60B
Net shares−469,319−469K−884,534−885K−1,593,527,039−1.59B
Net value−$374M−$607M−$31.6B

Insiders

Insider12 monthsShares held
William D. Mosley
CEO, Director
−98.8%
346,108
Gianluca Romano
EVP & CFO
−385.5%
70,757
Richard L. Clemmer
Director
—
34,771
Kian Fatt Chong
EVP Global Operations
New
25,093
John Christopher Morris
EVP & CTO
−308.2%
20,933

Trades

1,166 trades since 2003
TypeInsiderRoleSharesPriceHeld after
Nov 2, 2026Plan sale
William D. MosleyCEO, Director
CEO, Director
CEO, Director
6,720
at $622.82
$622.82$4.19M
−1.9%
346K after
346,108
Nov 2, 2026Plan sale
William D. MosleyCEO, Director
CEO, Director
CEO, Director
23,280
at $602.44
$602.44$14.0M
−6.2%
Changed by trades not shown: 353K after
Changed by trades not shown: 352,828
Oct 30, 2026Plan sale
John Christopher MorrisEVP & CTO
EVP & CTO
EVP & CTO
2,675
at $650.15
$650.15$1.74M
−11.3%
Changed by trades not shown: 20.9K after
Changed by trades not shown: 20,933
Oct 23, 2026Sale
James CI LeeEVP & CLO
EVP & CLO
EVP & CLO
547
at $642.14
$642.14$351K
−34.5%
1.04K after
1,037
Oct 1, 2026Plan sale
William D. MosleyCEO, Director
CEO, Director
CEO, Director
11,002
at $935.60
$935.60$10.3M
−2.9%
362K after
362,108
Oct 1, 2026Plan sale
William D. MosleyCEO, Director
CEO, Director
CEO, Director
18,998
at $914.67
$914.67$17.4M
−4.8%
Changed by trades not shown: 373K after
Changed by trades not shown: 373,110
Sep 21, 2026Plan sale
John Christopher MorrisEVP & CTO
EVP & CTO
EVP & CTO
9,354
at $877.91
$877.91$8.21M
−29.2%
22.7K after
22,693
Sep 15, 2026Sale
Gianluca RomanoEVP & CFO
EVP & CFO
EVP & CFO
49,984
at $772.16
$772.16$38.6M
−41.4%
70.8K after
70,757
Sep 15, 2026Sale
William D. MosleyCEO, Director
CEO, Director
CEO, Director
97,889
at $772.14
$772.14$75.6M
−20.6%
378K after
378,108
Sep 15, 2026Plan sale
Ban Seng TehEVP & Chief Commercial Officer
EVP & Chief Commercial Officer
EVP & Chief Commercial Officer
52,730
at $782.08
$782.08$41.2M
−90.1%
5.81K after
5,810
  • William D. Mosley$4.19M
    Nov 2, 2026 · Plan sale6,720 at $622.82
    CEO, Director−1.9% of holdings, 346K after
  • William D. Mosley$14.0M
    Nov 2, 2026 · Plan sale23,280 at $602.44
    CEO, Director−6.2% of holdings, Changed by trades not shown: 353K after
  • John Christopher Morris$1.74M
    Oct 30, 2026 · Plan sale2,675 at $650.15
    EVP & CTO−11.3% of holdings, Changed by trades not shown: 20.9K after
  • James CI Lee$351K
    Oct 23, 2026 · Sale547 at $642.14
    EVP & CLO−34.5% of holdings, 1.04K after
  • William D. Mosley$10.3M
    Oct 1, 2026 · Plan sale11,002 at $935.60
    CEO, Director−2.9% of holdings, 362K after
  • William D. Mosley$17.4M
    Oct 1, 2026 · Plan sale18,998 at $914.67
    CEO, Director−4.8% of holdings, Changed by trades not shown: 373K after
  • John Christopher Morris$8.21M
    Sep 21, 2026 · Plan sale9,354 at $877.91
    EVP & CTO−29.2% of holdings, 22.7K after
  • Gianluca Romano$38.6M
    Sep 15, 2026 · Sale49,984 at $772.16
    EVP & CFO−41.4% of holdings, 70.8K after
  • William D. Mosley$75.6M
    Sep 15, 2026 · Sale97,889 at $772.14
    CEO, Director−20.6% of holdings, 378K after
  • Ban Seng Teh$41.2M
    Sep 15, 2026 · Plan sale52,730 at $782.08
    EVP & Chief Commercial Officer−90.1% of holdings, 5.81K after