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STX Seagate Technology (STX) Insider Trading, Ownership & Congress Trades

Tech Hardware · Computer storage devices · CIK 0001137789
Quote by TradingView
Form 144 · 28
Insider buyers, 180 days
0
House members buying, 1 year
0
STOCK Act, US House only, disclosed up to 45 days after the trade
Funds added, last quarter
1,217
13F, latest reported quarter
Conversions, 180 days
85
Codes C/M, not in net · $11.8M priced

What the filings say about STX

Insiders, 180 days
-$505.9M net sold
9 sellers · 42% of sales under a 10b5-1 plan
Congress, 1 year
0 bought · 3 sold
Latest: sale, 2026-09-30
Planned sales (Form 144), 90 days
$391.4M
28 notices

Seagate Technology insider trades (Form 4)

Form 4 buys and sells (codes P and S). Grants, option exercises and conversions excluded.

Over the last 180 days, Seagate Technology Holdings plc insiders sold a net $505.9M of stock across 926 Form 4 purchases and sales, with no insider buying. Source: SEC Form 4 filings, as of 2026-10-27.

Insider
Filed
Shares
Value
Since filing
Lee James CI
EVP & CLO
SELL
2026-10-26 SECtraded 2026-10-23
547.25
$351.4K
n/a
Context
  • 44 earlier Form 4 trades (code P or S) here by this insider (44 sales), the last on Aug 24, 2026.
  • The trade is 52.8% of the 1,036 shares held after it.
  • 1 other insider sold within 30 days.
  • 1,217 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: EVP & CLO Lee James CI sold about $351.4K of STX on Oct 23, 2026; 1 other insider sold within 30 days and 1,217 funds added in the latest 13F quarter.
MOSLEY WILLIAM D
CEO
SELL
2026-10-02 SECtraded 2026-10-01
360
$334.4K
-28.9%
Context
  • 375 earlier Form 4 trades (code P or S) here by this insider (375 sales), the last on Sep 15, 2026.
  • The trade is 0.1% of the 372,750 shares held after it.
  • 5 other insiders sold within 30 days.
  • 1,217 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: CEO MOSLEY WILLIAM D sold about $334.4K of STX under a 10b5-1 plan on Oct 1, 2026; 5 other insiders sold within 30 days and 1,217 funds added in the latest 13F quarter.
MOSLEY WILLIAM D
CEO
SELL
2026-10-02 SECtraded 2026-10-01
855
$795.2K
-28.9%
Context
  • 375 earlier Form 4 trades (code P or S) here by this insider (375 sales), the last on Sep 15, 2026.
  • The trade is 0.2% of the 371,895 shares held after it.
  • 5 other insiders sold within 30 days.
  • 1,217 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: CEO MOSLEY WILLIAM D sold about $795.2K of STX under a 10b5-1 plan on Oct 1, 2026; 5 other insiders sold within 30 days and 1,217 funds added in the latest 13F quarter.
MOSLEY WILLIAM D
CEO
SELL
2026-10-02 SECtraded 2026-10-01
1,665
$1.6M
-28.9%
Context
  • 375 earlier Form 4 trades (code P or S) here by this insider (375 sales), the last on Sep 15, 2026.
  • The trade is 0.4% of the 370,230 shares held after it.
  • 5 other insiders sold within 30 days.
  • 1,217 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: CEO MOSLEY WILLIAM D sold about $1.6M of STX under a 10b5-1 plan on Oct 1, 2026; 5 other insiders sold within 30 days and 1,217 funds added in the latest 13F quarter.
MOSLEY WILLIAM D
CEO
SELL
2026-10-02 SECtraded 2026-10-01
1,320
$1.2M
-28.9%
Context
  • 375 earlier Form 4 trades (code P or S) here by this insider (375 sales), the last on Sep 15, 2026.
  • The trade is 0.4% of the 368,910 shares held after it.
  • 5 other insiders sold within 30 days.
  • 1,217 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: CEO MOSLEY WILLIAM D sold about $1.2M of STX under a 10b5-1 plan on Oct 1, 2026; 5 other insiders sold within 30 days and 1,217 funds added in the latest 13F quarter.
926 transactions on record
Since filing: total return from the first close after the filing to the latest close, dividend-adjusted. Not a forecast.
Context lines are counts over the filings above and returns from our own price history, never a price level. Not investment advice.
See all insider buying · insider selling
Showing the latest few. to see 921 more transactions and use the screener and CSV export. We store only your email; there is no password.
Seven facts, ranked against the sector · Rank is not a forecast
Insiders
net -$505.9M over 180 days
-$379.2M over 90 days
below 97% of Tech Hardware
Congress
no House purchase disclosed in the last 12 months
Funds
1,217 funds bought in last quarter
more than 92% of Tech Hardware
Revenue
+34.1% year over year
more than 82% of Tech Hardware
Margin
26.1% net margin
more than 90% of Tech Hardware
Buybacks
$176.0M repurchased, FY to 2026-07-03
more than 62% of Tech Hardware
Short interest
3.1% of the float short (float per yahoo 2026-10-26) · 1.8 days to cover · settled 2026-09-30
below 55% of Tech Hardware
What changed in the last 30 days
Oct 26EVP & CLO Lee James CI sold $351.4K (Oct 23)
Oct 23Officer Lee James CI filed to sell $379.8K by Oct 23 (Form 144)
Why it matters
A Form 144 is a notice of intent to sell; the sale may not happen, and it says nothing about the price.
Oct 12Rep. Lisa McClain sold $15K to $50K, disclosed 12 days after the trade
Why it matters
House members report a bracket, not an exact amount, and have 45 days to do it; the trade is weeks old when it becomes public.
Oct 2CEO MOSLEY WILLIAM D sold $27.7M under a 10b5-1 plan (Oct 1)
Why it matters
A 10b5-1 plan schedules trades months ahead, so this says little about what the insider thinks today.

Watch STX

A free account keeps a watchlist and can send one email a day when insiders, funds or Congress file on the names in it. No password and no card.

The year, with the filings on it
Total return over 12 months. Each marker is a filing; hover or tap one for the detail.
+194.7%12M
+0%+137%+274%+411%2025-102025-122026-022026-042026-062026-082026-10 2026-09-15 · MOSLEY WILLIAM D sold $75.6M2026-09-15 · Romano Gianluca sold $38.6M2026-09-15 · Morris John Christopher sold $11.9M2026-03-19 · MOSLEY WILLIAM D sold $10.0M2026-08-21 · MOSLEY WILLIAM D sold $9.6M2026-05-14 · Teh Ban Seng sold $6.5M2026-09-11 · Romano Gianluca sold $6.3M2026-09-15 · Teh Ban Seng sold $5.7M2026-08-13 · Teh Ban Seng sold $5.5M2026-09-15 · Teh Ban Seng sold $5.2M2026-09-11 · Romano Gianluca sold $4.6M2026-01-29 · Teh Ban Seng sold $4.2M2026-08-21 · Romano Gianluca sold $4.2M2026-01-29 · Teh Ban Seng sold $4.1M2026-09-11 · Romano Gianluca sold $3.8M2026-09-01 · MOSLEY WILLIAM D sold $3.7M2026-05-20 · MOSLEY WILLIAM D sold $3.6M2026-09-11 · Romano Gianluca sold $3.5M2026-09-01 · MOSLEY WILLIAM D sold $3.5M2026-09-15 · Teh Ban Seng sold $3.2M2026-05-20 · MOSLEY WILLIAM D sold $3.2M2026-09-15 · Teh Ban Seng sold $3.1M2026-08-21 · MOSLEY WILLIAM D sold $2.9M2026-08-21 · MOSLEY WILLIAM D sold $2.9M2026-09-11 · Romano Gianluca sold $2.8M2026-09-15 · Teh Ban Seng sold $2.7M2026-09-15 · Teh Ban Seng sold $2.5M2026-02-23 · Chong Kian Fatt sold $2.4M2026-05-20 · MOSLEY WILLIAM D sold $2.4M2026-09-01 · MOSLEY WILLIAM D sold $2.3M2026-08-21 · Romano Gianluca sold $2.3M2026-07-01 · MOSLEY WILLIAM D sold $2.2M2026-08-21 · Lee James CI sold $2.1M2026-07-01 · MOSLEY WILLIAM D sold $2.1M2026-05-20 · MOSLEY WILLIAM D sold $2.0M2026-09-15 · Teh Ban Seng sold $2.0M2025-11-12 · Romano Gianluca sold $1.9M2025-10-30 · Chong Kian Fatt sold $1.9M2026-09-15 · Teh Ban Seng sold $1.9M2026-07-01 · MOSLEY WILLIAM D sold $1.9M2026-09-15 · Teh Ban Seng sold $1.8M2026-09-11 · Romano Gianluca sold $1.7M2026-10-23 · Lee James CI filed to sell $379.8K2026-09-21 · JOHN C MORRIS filed to sell $12.8M2026-09-15 · MOSLEY WILLIAM D filed to sell $79.4M2026-09-15 · Morris John Christopher filed to sell $12.5M2026-09-15 · Romano Gianluca filed to sell $40.5M2026-09-15 · BAN SENG TEH filed to sell $41.2M2026-09-14 · MOSLEY WILLIAM D filed to sell $1.5M2026-09-14 · Morris John Christopher filed to sell $404.4K2026-09-14 · Romano Gianluca filed to sell $783.4K2026-09-14 · BAN SENG TEH filed to sell $770.4K2026-09-11 · GIANLUCA ROMANO filed to sell $43.5M2026-09-10 · MOSLEY WILLIAM D filed to sell $2.6M2026-09-10 · Morris John Christopher filed to sell $518.0K2026-09-10 · Romano Gianluca filed to sell $1.2M2026-09-10 · BAN SENG TEH filed to sell $570.2K2026-09-01 · YOLANDA CONYERS filed to sell $621.3K2026-09-01 · WILLIAM D. MOSLEY filed to sell $74.6M2026-08-24 · JAMES LEE filed to sell $7.7M2026-08-21 · Lee James CI filed to sell $3.4M2026-08-21 · MOSLEY WILLIAM D filed to sell $15.5M
Insider sellForm 144 (planned sale)
Indexed to 100, dividend-adjusted, not a price chart. When a name files heavily, the largest trades are drawn first.

Who owns STX: institutional holders (13F)

13F holdings, latest reported quarter
BlackRock, Inc.
15,166,793 sh
$14.6B
VANGUARD CAPITAL MANAGEMENT LLC
14,630,067 sh
$14.1B
STATE STREET CORP
9,911,669 sh
$9.6B
FMR LLC
8,153,134 sh
$7.9B
VANGUARD PORTFOLIO MANAGEMENT LLC
7,999,686 sh
$7.7B

Congress trades in STX

STOCK Act disclosures, US House only, filed up to 45 days after the trade
Lisa McClain
Sold 2026-09-30 · disclosed 12 days later
$15,001 - $50,000
Kevin Hern
Sold 2026-09-15 · disclosed 10 days later
$1,001 - $15,000
Julie Johnson
Sold 2025-12-18 · disclosed 28 days later
$1,001 - $15,000
Julie Johnson
Sold 2025-11-13 · disclosed 28 days later
$1,001 - $15,000
Kevin Hern
Sold 2025-10-28 · disclosed 19 days later
$15,001 - $50,000
All stocks members of Congress are buying · Every member's trades

Activist and 5% holders (13D/13G)

No 5%+ ownership filings
Nobody has filed for crossing 5%. That is a fact, not missing data.

STX planned insider sales (Form 144)

Notice of intent to sell, filed before any sale
Lee James CI
Filed 2026-10-23
$379.8K
JOHN C MORRIS
Filed 2026-09-21
$12.8M
MOSLEY WILLIAM D
Filed 2026-09-15
$79.4M
Morris John Christopher
Filed 2026-09-15
$12.5M
Romano Gianluca
Filed 2026-09-15
$40.5M

STX mutual fund holders (N-PORT)

Funds ranked by the share of their own portfolio in this stock (N-PORT).
ICON EQUITY FUND
$5.2M position · as of 2026-06-30
9.0%
Touchstone ETF Trust-Touchstone Sands Capital US Select Growth ETF
$6.5M position · as of 2026-06-30
7.8%
Touchstone Funds Group Trust-Touchstone Sands Capital Select Growth Fund
$159.4M position · as of 2026-06-30
7.2%
Timothy Plan Free Cash Flow Growth ETF
$2.2M position · as of 2026-06-30
6.2%
Adaptive Core ETF
$1.0M position · as of 2026-06-30
6.0%
WCM Focused International Growth Fund
$1.3B position · as of 2026-06-30
5.9%
SEC N-PORT, monthly, about 60 days late · funds ≥ $10M · % is the share of the fund's own portfolio
Executive pay vs shareholder return · William D. Mosley
CEO pay, headline and as actually paid, against the company's return and its chosen peers' (DEF 14A).
FY
CEO total
Actually paid
Other execs, avg
TSR
Peer TSR
2026
$26.9M
$606.4M
$7.5M
+994%
+150%
2024
$17.2M
$57.4M
$5.5M
+87%
+53%
2023
$13.6M
$31.3M
$4.4M
+33%
+57%
2022
$11.4M
$4.8M
$3.3M
-23%
+40%
2021
$11.6M
$36.8M
$3.2M
+92%
+56%
Tagged by the company under SEC Item 402(v). Returns are cumulative from the start of the disclosure period. Green where the company beat its own peer group.
Live price
Daily candles from TradingView, under their licence. No filings marked.
Why this name is on the desk
Insiders have filed to sell, before selling.
The record shows a net $505.9M sold by insiders over 180 days, 1,217 funds added last quarter, $391.4M in planned Form 144 sales. Each figure is a federal filing, dated the day it went public.
Backtest this pattern Open the screener
Same sector, ranked by filing activity
Sector by SEC SIC code
DELLANETPANWVPLMMSIFTNTCIENFFIVQCOMWDCLITECSCO

STX financials

Revenue growth
+34.1%
XBRL, annual
Net margin
26.1%
Ratios from the company's XBRL filings, latest filings
Revenue, TTM
$12.2B
four quarters, 2025-06-28 to 2026-07-03
Net margin, TTM
+26.1%
net income over revenue, 2025-06-28 to 2026-07-03
Free cash flow, TTM
$3.1B
operating cash flow minus capex, 2025-06-28 to 2026-07-03
Debt to equity
1.65x
long-term 2026-07-03 plus current 2026-07-03; equity 2026-07-03
Cash flow to debt
1.03x
TTM operating cash flow over long-term 2026-07-03 plus current 2026-07-03
Return on equity
+371.5%
TTM net income over average of 2025-06-27 and 2026-07-03
Return on assets
+35.4%
TTM net income over average of 2025-06-27 and 2026-07-03
Return on invested capital
+113.1%
operating income after a 13.7% effective tax rate, over long-term 2026-07-03 plus current 2026-07-03 plus average of 2025-06-27 and 2026-07-03 minus cash
Return on capital employed
+67.0%
operating income (EBIT proxy) over average of 2025-06-27 and 2026-07-03 minus current liabilities
P/E, trailing
45.33x
close 2026-10-23 over four quarters of diluted EPS, 2025-06-28 to 2026-07-03
Enterprise value
$144.8B
market value at close 2026-10-23 on 2026-07-31 shares, plus long-term 2026-07-03 plus current 2026-07-03, minus cash 2026-07-03
FCF yield
+2.2%
TTM free cash flow over market value at close 2026-10-23
PEG, trailing
0.43x
P/E over trailing EPS growth of 105%: four quarters to 2026-07-03 against the four to 2025-06-27
Price as of 2026-10-23. Hover or tap a tile for its yearly and quarterly history.
Method
TTM is four consecutive fiscal quarters; Q4 is the year minus nine months when not filed. Returns use the average of opening and closing balances. EBIT is approximated by operating income. PEG uses trailing EPS growth.
Fundamentals
Annual figures from XBRL filings. Pick a past date to see them as known then.
2026-072025-062024-062023-06
Revenue$12.2B$9.1B$6.6B$7.4B
Operating income$4.1B$1.9B$452.0M-$342.0M
Net income$3.2B$1.5B$335.0M-$529.0M
EPS (diluted)13.906.771.58-2.56
Operating cash flow$3.7B$1.1B$918.0M$942.0M
Cash$1.7B$891.0M$1.4B$786.0M
Long-term debt$3.4B$5.0B$5.2B$5.4B
Buybacks$176.0M$0$0$408.0M
Dividends paid$634.0M$600.0M$585.0M$582.0M
SEC XBRL, fiscal years, as known on 2026-10-27

STX Stock Sonar score 6/7 axes

Find similar shapesCompare

STX ranks highest on profitability (95th percentile) and growth (82nd), and lowest on insider conviction (1st), among Tech Hardware peers.

ProfitHealthGrowthInsidersInstitutionsRisk
Profitability
95
Inputs
  • Return on equity+371.5% · 97 pct, sector of 77
  • Return on assets+35.4% · 91 pct, sector of 92
  • Return on invested capital+113.1% · 99 pct, universe of 1,069
  • Return on capital employed+67.0% · 94 pct, sector of 72
Financial health
45
Inputs
  • Debt to equity1.65x · 13 pct, sector of 72
  • Cash flow to debt1.03x · 77 pct, sector of 63
Growth
82
Inputs
  • Revenue growth, YoY+34.1% · 82 pct, sector of 102
  • Backlog growth, YoYno backlog line filed, or no year-earlier backlog
Insider conviction
1
Inputs
  • Net Form 4 buying (codes P and S), 180d-$335.4M · 3 pct, sector of 75
  • Insider buyers, 180d0 · 0 pct, sector of 77
Institutional and government
47
Inputs
  • Funds adding, latest quarter1,217 · 92 pct, sector of 89
  • Congress net buyers, 365d-3 · 1 pct, universe of 719
  • Federal contracts, 180dno federal contracts in 180 days
  • Lobbying spend, 4 quartersno lobbying filings in the last four quarters
Risk and compliance
59
Inputs
  • Short interest, % of float+3.1% · 61 pct, sector of 105
  • Recalls per $1B revenue, 3ynot measured for this sector, almost no peer has an event
  • EPA cases per $1B revenue, 5ynot measured for this sector, almost no peer has an event
  • New text in Risk Factors, latest 10-K+10.7% · 57 pct, sector of 80
1 not measured: US patents
  • US patents needs 1 of 2 inputs, 0 present: patent data not loaded yet

6 of 7 axes scored. Each is a percentile against sector peers (all companies when the sector is thin); higher is better. An unscored axis is unmeasured, not low. How it is scored

STX filings, in plain words

Are Seagate Technology insiders buying or selling STX?

In the 180 days to 2026-10-27, Seagate Technology insiders were net sellers, a net $505.9M across purchases and sales reported on Form 4, by 9 sellers.

Have members of Congress traded STX?

Yes. In the year to 2026-10-27, 0 House members disclosed buying STX and 3 House members disclosed selling it; the latest on record is a sale by Lisa McClain dated 2026-09-30.

Are there planned insider sales of STX?

Yes. 28 Form 144 notices of planned insider sales were filed in the 90 days to 2026-10-27, covering $391.4M of stock; the latest, by Lee James CI, was filed 2026-10-23.

Read the full summary

In the 180 days to 2026-10-27, Seagate Technology insiders were net sellers of STX, a net $505.9M across purchases and sales reported on Form 4 by 9 sellers. 42% of the 578 insider sales were made under a Rule 10b5-1 plan; the rest were not flagged as planned. In the year to 2026-10-27, 0 members of Congress disclosed buying STX and 3 members disclosed selling it; the latest on record is a sale by Lisa McClain dated 2026-09-30. Insiders filed 28 Form 144 notices of intent to sell in the 90 days to 2026-10-27, covering $391.4M of stock. Each figure is counted from SEC and House filings as of 2026-10-27, dated the day the filing was made public.

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