STX Seagate Technology plc

NASDAQ
$945.57

Seagate Technology plc (STX) Insider Activity

What the officers, directors and large holders did with their own shares. Only open-market purchases and sales count toward the totals — grants, option exercises and shares withheld for tax are compensation mechanics, not decisions, and they're listed separately below.

30D 90D 6M 1Y
Insider signal Bearish Selling ran elevated versus STX's own trailing one-year pace, with 2% of sale value under a prearranged plan.
Cluster activity 0 buyers in the last 30 days 0 buyers in the last 90 days 6 sellers in the last 90 days
Insiders buying
0
0 transactions
Insiders selling
6
335 transactions
Purchases
$0
0 shares
Sales
$351.7M
437,500 shares
Net activity
-$351.7M
purchases less sales

How much of that selling was preplanned? 2% planned / 98% discretionary

10b5-1 plan sales $8.2M 25 transactions · 9,858 shares
Discretionary sales $343.5M 310 transactions · 427,642 shares

Largest single sale: $75.6M.

Where they traded

Buy Sell Dot area is proportional to transaction value.

No open-market insider purchase on record.

Recent open-market activity

Date Insider Role Action Shares Price Value Held after
Morris John Christopher 26 fills EVP & CTO Sell 9,354 $877.91 $8.2M 32,007 −22.6% of holding
MOSLEY WILLIAM D CEO Sell 97,889 $772.14 $75.6M 378,108 −20.6% of holding
Teh Ban Seng 23 fills EVP & Chief Commercial Officer Sell 51,816 $782.27 $40.5M 54,175 −48.9% of holding
Romano Gianluca EVP & CFO Sell 49,984 $772.16 $38.6M 70,756 −41.4% of holding
Morris John Christopher EVP & CTO Sell 15,466 $772.15 $11.9M 31,132 −33.2% of holding
Teh Ban Seng EVP & Chief Commercial Officer Sell 10b5-1 914 $771.38 $705.0K 57,626 −1.6% of holding
MOSLEY WILLIAM D CEO Sell 1,870 $781.23 $1.5M 298,998 −0.6% of holding
Teh Ban Seng EVP & Chief Commercial Officer Sell 10b5-1 989 $779.00 $770.4K 5,810 −14.5% of holding
Romano Gianluca EVP & CFO Sell 955 $781.24 $746.1K 30,360 −3% of holding
Morris John Christopher EVP & CTO Sell 493 $781.23 $385.0K 16,468 −2.9% of holding
Romano Gianluca 24 fills EVP & CFO Sell 45,898 $830.01 $38.1M 79,078 −36.7% of holding
Romano Gianluca 14 fills EVP & CFO Sell 10b5-1 4,600 $854.55 $3.9M 34,020 −11.9% of holding
MOSLEY WILLIAM D 2 fills CEO Sell 2,849 $862.13 $2.5M 297,548 −0.9% of holding
Romano Gianluca 2 fills EVP & CFO Sell 1,348 $862.13 $1.2M 29,620 −4.4% of holding
Teh Ban Seng EVP & Chief Commercial Officer Sell 10b5-1 663 $860.09 $570.2K 5,810 −10.2% of holding
Morris John Christopher 2 fills EVP & CTO Sell 572 $862.13 $493.4K 16,018 −3.4% of holding
MOSLEY WILLIAM D 26 fills CEO Sell 30,000 $816.28 $24.5M 324,810 −8.5% of holding
Conyers Yolanda Lee Director Sell 10b5-1 750 $815.11 $611.3K 3,351 −18.3% of holding
Lee James CI 29 fills EVP & CLO Sell 9,013 $794.84 $7.2M 9,320 −49.2% of holding
MOSLEY WILLIAM D 3 fills CEO Sell 18,138 $849.35 $15.4M 311,168 −5.5% of holding
Teh Ban Seng 26 fills EVP & Chief Commercial Officer Sell 9,782 $853.11 $8.3M 14,903 −39.6% of holding
Romano Gianluca 3 fills EVP & CFO Sell 9,076 $849.35 $7.7M 28,494 −24.2% of holding
Lee James CI 3 fills EVP & CLO Sell 3,939 $849.35 $3.3M 5,328 −42.5% of holding
Morris John Christopher 3 fills EVP & CTO Sell 3,516 $849.35 $3.0M 15,460 −18.5% of holding
Teh Ban Seng EVP & Chief Commercial Officer Sell 10b5-1 80 $835.54 $66.8K 14,992 −0.5% of holding
Teh Ban Seng 19 fills EVP & Chief Commercial Officer Sell 6,048 $842.97 $5.1M 20,880 −22.5% of holding
Morris John Christopher EVP & CTO Sell 523 $835.54 $437.0K 15,460 −3.3% of holding
Teh Ban Seng 2 fills EVP & Chief Commercial Officer Sell 7,361 $920.80 $6.8M 4,290 −63.2% of holding
Romano Gianluca 62 fills EVP & CFO Sell 21,611 $803.23 $17.4M 42,514 −33.7% of holding
Romano Gianluca 3 fills EVP & CFO Sell 10b5-1 600 $792.38 $475.4K 42,674 −1.4% of holding
MOSLEY WILLIAM D 47 fills CEO Sell 29,600 $817.01 $24.2M 325,437 −8.3% of holding
MOSLEY WILLIAM D CEO Sell 10b5-1 400 $819.41 $327.8K 312,197 −0.1% of holding
Morris John Christopher EVP & CTO Sell 10b5-1 168 $817.76 $137.4K 11,920 −1.4% of holding
Lee James CI EVP & CLO Sell 10b5-1 694 $877.45 $609.0K 347 −66.7% of holding
Lee James CI EVP & CLO Sell 542 $905.01 $490.7K 1,019 −34.7% of holding

Form 4s are due within two business days of a transaction, so this is close to real time — unlike the quarterly 13F data on the Institutional tab. A single large sale often reflects a prearranged 10b5-1 plan rather than a fresh view, so read a pattern of sales rather than any one of them.