undamentalytics Newsletter

Seagate Technology insider trading

Every open-market purchase and sale by Seagate Technology's officers, directors and largest shareholders since November 4, 2021, and what the share price did next.

No insider has bought shares on the open market in five years.

Insider purchase Insider sale Marker size reflects trade value. Weekly closes adjusted for splits; may be delayed.
Seagate Technology insider open-market trades
DateInsiderTrade SharesPriceValue 1M after 3M after 6M after

From insiders' Form 4 filings with the SEC: open-market purchases and sales only (awards, option exercises and shares withheld for tax are excluded), combined to one line per insider per day. "Plan" marks trades the filing says were made under a pre-set Rule 10b5-1 trading plan, which are scheduled in advance. Price changes run from the close on the trade date; hover a figure for the change relative to the S&P 500. Past moves don't predict future ones.

Does following Seagate Technology’s insiders pay?

From April 27, 2010 to October 26, 2026, 41 insiders reported 15 open-market purchases and 277 sales not made under a pre-set plan in Seagate Technology. Twelve months after each purchase was reported, the shares were +18.4% against the S&P 500 on average (median +16.1%), over 15 purchases with a full year of prices; 67% beat the index. After sales, the shares moved +21.6% against the index over 12 months (a negative figure means selling was the right call). That rests on fewer than 20 purchases, too few to read much into. Buying each purchase the day after it was reported, an equal amount each, held 12 months or until that insider reported a sale, would have turned $10,000 on November 11, 2013 into $46,143 by November 2, 2026, +12.5% a year. It held shares 33% of the time; the S&P 500 on those same days, with Treasury bills otherwise, made $24,023 (+7.0% a year), and held throughout $53,075 (+13.8%).

$0$20.0k$40.0k 2013201520172019202120232025 $53.1k$46.1k$24.0k
Copying Seagate Technology's insidersS&P 500, same days investedS&P 500, held throughout $10,000 copying every open-market purchase by Seagate Technology's insiders from November 11, 2013, before costs and taxes, marked weekly. Uninvested money earns the Treasury bill rate; the portfolio held shares 33% of the time.
Seagate Technology: each insider's record
InsiderRolePurchases12 months after their purchasesBeat the S&P 500Sales12 months after their salesLatest report
Luczo Stephen J Executive Chairman & COB 2 +74.9% (2) 100% 29 +4.0% (29) March 8, 2022
Richarz David K Executive Vice President,Sales 0 — — 26 +1.3% (26) April 28, 2015
Morton David H Jr EVP & CFO 0 — — 20 +17.9% (20) March 7, 2018
Whitmore Robert W EVP & Chief Technical Officer 0 — — 17 +27.9% (17) May 31, 2013
Re Mark SVP & CTO 0 — — 13 −12.9% (13) May 16, 2017
Geldmacher Jay L Director 0 — — 12 +51.3% (10) February 2, 2026
Mosley William D CEO 0 — — 12 +6.7% (5) September 16, 2026
Pimentel Albert A President, Global Mkts and CSO 0 — — 12 −1.5% (12) August 17, 2015
O Malley Patrick J EVP & Chief Financial Officer 0 — — 11 +37.1% (11) November 4, 2014
Dehaan Douglas J General Manager, Samsung HDD 0 — — 9 −0.9% (9) April 29, 2015
Massaroni Kenneth M EVP,General Counsel, CAO 0 — — 9 +4.5% (9) February 13, 2015
Murphy James J EVP, Sales & Marketing 0 — — 9 −4.1% (9) December 10, 2019
Park Chong Sup Director 0 — — 8 +3.1% (8) February 1, 2018
Reyes Gregorio Director 0 — — 8 +6.0% (8) February 2, 2015
Romano Gianluca EVP & CFO 0 — — 8 −6.8% (3) September 16, 2026
Biondi Frank Director 0 — — 7 +24.1% (7) August 9, 2016
Brace Philip G Former President, CSSG 2 +47.1% (2) 100% 5 +10.6% (5) January 16, 2018
Teh Ban Seng EVP & Chief Commercial Officer 0 — — 7 +189.8% (4) August 14, 2026
Zander Edward J Director 0 — — 7 +13.3% (7) October 24, 2023
Marshall Lydia Micheaux Director 0 — — 6 +18.8% (6) May 8, 2014
Morris John Christopher EVP & CTO 0 — — 6 −10.0% (2) September 16, 2026
Tilenius Stephanie Director 0 — — 5 +164.0% (3) May 6, 2026
Chong Kian Fatt EVP Global Operations 0 — — 4 +396.3% (2) February 23, 2026
Cannon Michael R Director 0 — — 3 +172.4% (3) June 6, 2025
Fochtman Jeffrey D. SVP, Business & Marketing 0 — — 3 +17.1% (3) November 10, 2021
Lee James Ci EVP & CLO 0 — — 3 — October 26, 2026
Naik Ravi EVP & CIO 1 −30.1% (1) 0% 2 −17.0% (2) November 9, 2021
Schuelke Katherine SVP, CLO & Corporate Secretary 0 — — 3 +11.7% (3) December 12, 2023
Va Partners I, LLC Director 2 +10.1% (2) 50% 1 −29.7% (1) February 22, 2022
Valueact Capital Management, L.P. Director 3 +10.8% (3) 67% 0 — November 30, 2018
Valueact Capital Management, LLC Director 1 +5.1% (1) 100% 2 +11.7% (2) May 4, 2021
Valueact Capital Master Fund, L.P. Director 2 −12.4% (2) 0% 1 −31.7% (1) November 15, 2021
Arumugavelu Shankar Director 0 — — 2 — June 4, 2026
Nygaard Jeffrey D. Executive Vice President 1 +14.0% (1) 100% 1 −26.4% (1) May 16, 2018
Bruner Judy Director 0 — — 1 +633.0% (1) May 23, 2025
Coleman William T III Director 1 +16.1% (1) 100% 0 — November 8, 2013
Lerner James J President, Cloud Systems 0 — — 1 −32.2% (1) March 13, 2015
Macpherson Regan J SVP and General Counsel 0 — — 1 −13.0% (1) November 18, 2016
Moyo Dambisa F Director 0 — — 1 +1.1% (1) October 25, 2017
Samsung Electronics Co Ltd /fi 10% owner 0 — — 1 +7.8% (1) October 22, 2013

Moves are the shares’ return including dividends minus the S&P 500’s, from the close on the first trading day after each report; the number of trades with a finished 12-month window is in brackets. Green means the trade went the insider’s way (a purchase ahead of the index, a sale followed by the shares trailing it). The 40 most active of 41 insiders are shown. A trade reported both by a director or officer and by a fund or company they are linked to counts once here, under the person. Purchases count only where the share price actually traded was at least $5. These figures describe what the shares did, not why anyone traded. Insiders across all companies.

When several insiders traded Seagate Technology

Months when 2 or more insiders became net buyers, or 3 or more net sellers, of Seagate Technology in reports dated in the 91 days before the month end, and how the stock did against the S&P 500 from that month end. After the 3 buying crowds with six months of prices, it averaged −3.9% against the index. After 11 selling crowds, +31.1%. One company's history is too short to judge by; the test across every company is the better guide.

MonthCrowd3 months on, vs S&P 5006 months12 months
June 30, 20265 selling−7.9%not yetnot yet
November 28, 20255 selling+29.7%+224.6%not yet
June 30, 20254 selling+51.0%+84.1%+517.3%
December 29, 20234 selling−2.9%+6.4%−20.8%
November 30, 20213 selling+7.2%−7.8%−37.4%
February 26, 20213 selling+23.3%−0.5%+31.2%
February 28, 20193 buying−5.0%−0.5%0.0%
August 31, 20183 buying−13.8%−7.5%−0.1%
November 30, 20173 selling+41.9%+48.2%+11.5%
February 29, 20162 buying−37.9%−3.7%+39.3%
August 31, 20153 selling−35.1%−33.4%−42.1%
November 29, 20139 selling+5.2%+3.6%+23.2%

Colours show whether the crowd was right: green when buyers were followed by a rise above the index, or sellers by a fall below it. Latest 12 of 15. Total returns from the month end; past patterns are not a forecast.

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