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STX Insider Trading & Form 4 Activity

Seagate Technology Holdings plc
Last filing: Jun 15, 2026·7 days ago
BEARISH · LAST 90 DAYS
0%
buyers
$0
0 buys
$8.4M
11 sells
-$8.4M
net selling
5
insiders
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ACTIVE SELLING CLUSTER

4 insiders sold a combined $7.2M of STX between Jun 4, 2026 and Jun 12, 2026.

Arumugavelu Shankar, Mosley William D, Romano Gianluca, Morris John Christopher

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Net flow — last 12 months

Monthly net of insider buys minus sells. Green months indicate net buying; red months indicate net selling.

Most active insiders

Ranked by total transaction value over the last 90 days.

INSIDERBOUGHTSOLDNET
Mosley William D
CEO
$49.5M
-$49.5M
Teh Ban Seng
EVP & Chief Commercial Officer
$13.6M
-$13.6M
Morris John Christopher
EVP & CTO
$5.8M
-$5.8M
Romano Gianluca
EVP & CFO
$3.4M
-$3.4M
Tilenius Stephanie
Insider
$1.2M
-$1.2M
Bhatt Prat
Insider
$930K
-$930K
Arumugavelu Shankar
Insider
$928K
-$928K
Conyers Yolanda Lee
Insider
$664K
-$664K

Recent transactions

Every Form 4 transaction for STX, newest first.

SELL10b5-1
Morris John Christopher · EVP & CTO
Tx Jun 12·Filed Jun 15·EDGAR ↗
466 sh @ $880.19
$410K
SELL
Mosley William D · CEO
Tx Jun 12·Filed Jun 15·EDGAR ↗
1,768 sh @ $880.19
$1.6M
SELL10b5-1
Morris John Christopher · EVP & CTO
Tx Jun 12·Filed Jun 15·EDGAR ↗
898 sh @ $880.19
$790K
SELL
Romano Gianluca · EVP & CFO
Tx Jun 12·Filed Jun 15·EDGAR ↗
903 sh @ $880.19
$795K
SELL10b5-1
Teh Ban Seng · EVP & Chief Commercial Officer
Tx Jun 12·Filed Jun 15·EDGAR ↗
989 sh @ $880.19
$871K
EXERCISE10b5-1
Teh Ban Seng · EVP & Chief Commercial Officer
Tx Jun 11·Filed Jun 15·EDGAR ↗
989 sh
EXERCISE10b5-1
Morris John Christopher · EVP & CTO
Tx Jun 11·Filed Jun 15·EDGAR ↗
942 sh
EXERCISE
Romano Gianluca · EVP & CFO
Tx Jun 11·Filed Jun 15·EDGAR ↗
1,695 sh
EXERCISE
Chong Kian Fatt · EVP Global Operations
Tx Jun 11·Filed Jun 15·EDGAR ↗
678 sh
EXERCISE
Mosley William D · CEO
Tx Jun 11·Filed Jun 15·EDGAR ↗
3,319 sh
SELL10b5-1
Teh Ban Seng · EVP & Chief Commercial Officer
Tx Jun 10·Filed Jun 11·EDGAR ↗
663 sh @ $821.86
$545K
SELL
Morris John Christopher · EVP & CTO
Tx Jun 10·Filed Jun 11·EDGAR ↗
254 sh @ $821.66
$209K
SELL
Romano Gianluca · EVP & CFO
Tx Jun 10·Filed Jun 11·EDGAR ↗
524 sh @ $821.73
$430K
SELL
Mosley William D · CEO
Tx Jun 10·Filed Jun 11·EDGAR ↗
1,318 sh @ $821.75
$1.1M
SELL
Romano Gianluca · EVP & CFO
Tx Jun 10·Filed Jun 11·EDGAR ↗
827 sh @ $821.77
$680K
SELL
Mosley William D · CEO
Tx Jun 10·Filed Jun 11·EDGAR ↗
1,537 sh @ $821.74
$1.3M
SELL
Morris John Christopher · EVP & CTO
Tx Jun 10·Filed Jun 11·EDGAR ↗
320 sh @ $821.65
$263K
EXERCISE10b5-1
Teh Ban Seng · EVP & Chief Commercial Officer
Tx Jun 9·Filed Jun 11·EDGAR ↗
663 sh
EXERCISE10b5-1
Teh Ban Seng · EVP & Chief Commercial Officer
Tx Jun 9·Filed Jun 11·EDGAR ↗
599 sh
EXERCISE
Mosley William D · CEO
Tx Jun 9·Filed Jun 11·EDGAR ↗
2,815 sh
EXERCISE
Mosley William D · CEO
Tx Jun 9·Filed Jun 11·EDGAR ↗
2,415 sh
EXERCISE
Chong Kian Fatt · EVP Global Operations
Tx Jun 9·Filed Jun 11·EDGAR ↗
379 sh
EXERCISE
Chong Kian Fatt · EVP Global Operations
Tx Jun 9·Filed Jun 11·EDGAR ↗
202 sh
EXERCISE
Romano Gianluca · EVP & CFO
Tx Jun 9·Filed Jun 11·EDGAR ↗
959 sh
EXERCISE
Romano Gianluca · EVP & CFO
Tx Jun 9·Filed Jun 11·EDGAR ↗
1,515 sh
EXERCISE
Morris John Christopher · EVP & CTO
Tx Jun 9·Filed Jun 11·EDGAR ↗
499 sh
EXERCISE
Morris John Christopher · EVP & CTO
Tx Jun 9·Filed Jun 11·EDGAR ↗
631 sh
SELL
Arumugavelu Shankar · Insider
Tx Jun 4·Filed Jun 4·EDGAR ↗
1,000 sh @ $927.68
$928K
SELL10b5-1
Bhatt Prat · Insider
Tx Jun 2·Filed Jun 2·EDGAR ↗
1,000 sh @ $929.88
$930K
SELL10b5-1
Mosley William D · CEO
Tx Jun 1·Filed Jun 2·EDGAR ↗
240 sh @ $887.72
$213K
SELL10b5-1
Mosley William D · CEO
Tx Jun 1·Filed Jun 2·EDGAR ↗
163 sh @ $888.89
$145K
SELL10b5-1
Mosley William D · CEO
Tx Jun 1·Filed Jun 2·EDGAR ↗
1,160 sh @ $890.98
$1.0M
SELL10b5-1
Mosley William D · CEO
Tx Jun 1·Filed Jun 2·EDGAR ↗
640 sh @ $889.94
$570K
SELL10b5-1
Mosley William D · CEO
Tx Jun 1·Filed Jun 2·EDGAR ↗
360 sh @ $885.67
$319K
SELL10b5-1
Mosley William D · CEO
Tx Jun 1·Filed Jun 2·EDGAR ↗
760 sh @ $892.06
$678K
SELL10b5-1
Mosley William D · CEO
Tx Jun 1·Filed Jun 2·EDGAR ↗
600 sh @ $884.62
$531K
SELL10b5-1
Conyers Yolanda Lee · Insider
Tx Jun 1·Filed Jun 2·EDGAR ↗
750 sh @ $885.33
$664K
SELL10b5-1
Mosley William D · CEO
Tx Jun 1·Filed Jun 2·EDGAR ↗
273 sh @ $938.82
$256K
SELL10b5-1
Mosley William D · CEO
Tx Jun 1·Filed Jun 2·EDGAR ↗
480 sh @ $918.75
$441K
SELL10b5-1
Mosley William D · CEO
Tx Jun 1·Filed Jun 2·EDGAR ↗
355 sh @ $937.39
$333K
SELL10b5-1
Mosley William D · CEO
Tx Jun 1·Filed Jun 2·EDGAR ↗
320 sh @ $916.77
$293K
SELL10b5-1
Mosley William D · CEO
Tx Jun 1·Filed Jun 2·EDGAR ↗
80 sh @ $940.00
$75K
SELL10b5-1
Mosley William D · CEO
Tx Jun 1·Filed Jun 2·EDGAR ↗
200 sh @ $915.52
$183K
SELL10b5-1
Mosley William D · CEO
Tx Jun 1·Filed Jun 2·EDGAR ↗
240 sh @ $930.12
$223K
SELL10b5-1
Mosley William D · CEO
Tx Jun 1·Filed Jun 2·EDGAR ↗
200 sh @ $931.65
$186K
SELL10b5-1
Mosley William D · CEO
Tx Jun 1·Filed Jun 2·EDGAR ↗
1,480 sh @ $929.38
$1.4M
SELL10b5-1
Mosley William D · CEO
Tx Jun 1·Filed Jun 2·EDGAR ↗
853 sh @ $909.18
$776K
SELL10b5-1
Mosley William D · CEO
Tx Jun 1·Filed Jun 2·EDGAR ↗
879 sh @ $904.70
$795K
SELL10b5-1
Mosley William D · CEO
Tx Jun 1·Filed Jun 2·EDGAR ↗
415 sh @ $933.25
$387K
SELL10b5-1
Mosley William D · CEO
Tx Jun 1·Filed Jun 2·EDGAR ↗
208 sh @ $893.00
$186K

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About STX insider trading data

Form 4 is the SEC filing required when an officer, director, or 10% owner of a public company buys or sells the company's stock. By law, these filings must be submitted within two business days of the trade. Tracenotes pulls every Form 4 filing for STX from EDGAR, parses it, and surfaces the activity on this page.

What insider buying tells you. Open-market purchases by insiders are widely studied as a meaningful signal. Unlike stock awards (which are compensation, not conviction), an executive spending their own money to buy shares of the company they run is a vote of confidence. Studies have found insider-buying clusters — three or more insiders buying within a short window — outperform the broader market over the following year.

What insider selling tells you. Selling is noisier. Many sales are pre-scheduled under SEC Rule 10b5-1 plans, which let insiders sell on a fixed schedule regardless of company news. We label these "10b5-1" so you can see them. Discretionary sales — sales not tied to a plan — are more meaningful, especially when multiple insiders sell in quick succession.

Tracenotes methodology. We scan EDGAR daily for new Form 4 filings, parse them into individual transactions, and detect clusters when three or more distinct insiders buy or sell within a 14-day window. The data on this page covers the last 12 months. For deeper analysis, Tracenotes also runs language-change detection on 10-K and 10-Q filings — that's our core product.

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Frequently asked questions

What is a Form 4 filing?

Form 4 is the SEC disclosure required when a company insider — an officer, director, or 10% owner — buys or sells the company's stock. By law these filings must be submitted within two business days of the trade.

Is insider buying STX always bullish?

Open-market purchases by insiders are widely viewed as a bullish signal because executives are spending their own money. Stock awards and option exercises are part of compensation and don't carry the same weight, which is why we treat them separately on this page.

What is a 10b5-1 trade?

A trade made under SEC Rule 10b5-1, which lets insiders pre-schedule sales weeks or months in advance. These sales execute on a fixed plan regardless of company news, so they're a weaker signal than discretionary sales. We label them with a "10b5-1" tag.

What is an insider cluster?

A cluster is when three or more distinct insiders buy or sell within a 14-day window. Clusters are studied as stronger signals than single trades because multiple people independently reach the same view. We surface active clusters on Seagate Technology Holdings plc (STX) when they form.

Where does STX insider trading data come from?

Every Form 4 filing for STX is sourced directly from SEC EDGAR. Tracenotes scans EDGAR daily, parses each Form 4 into individual transactions, and updates this page within hours of new filings.

Nothing on this page constitutes investment advice. Form 4 data is sourced from SEC EDGAR and provided for research purposes only.

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