STX
Seagate Technology Holdings PLC · Technology · Computer Hardware
$667.96
-6.39% today · -13.79% 1W
Oct 15 close or latest
ReadoutWhy it's moving
Moving with its memory & storage peers
- STX −6.39% on the last session vs SPY −0.29%: −6.1 pts of stock-specific move.
- Memory & storage basket -4.9% (-4.6 pts vs SPY; SNDK -6.6%, WDC -6.3%, SKHY -4.4%, NTAP -4.2%): the stock moved with its peers. Overnight: SK Hynix (Seoul) -11.1%, Samsung (Seoul) -9.5%.
- Aftermath, rsi oversold (RSI 30 today so far, below 30): After its 9 oversold readings in the past 5 years, STX was higher a day later 3 times out of 9; half the outcomes fell between -0.7% and +1.0%. History, not a forecast.
- 4 insider or congressional trades in the past 30 days.
- Market backdrop (Today): Core PPI m/m 1.3% vs 0.3% expected (hotter); Core Retail Sales m/m 0.9% vs 0.6% expected (stronger); S&P futures -0.08%, 10-year yield -3bp in the 30 minutes after.
- Activity: volume on pace for 2.6× its 20-day average.
Assembled from Wallsti's own signals.
Insiders · 1 month
−$126.1M
unplanned net · 0 buys · 7 sells · 4 insiders
sales: 3 unplanned, 4 under a 10b5-1 plan (43% unplanned)
Insiders · 3 months
−$165.8M
unplanned net · 0 buys · 34 sells · 6 insiders
sales: 13 unplanned, 21 under a 10b5-1 plan (38% unplanned)
Congress · 3 months
≈−$32.5K
0 buys · 1 sell · 1 member
Congress · 1 year
≈−$73K
1 buy · 4 sells · 4 members
Fund moves · 3 months
none
no moves by the funds we follow
Held by funds · now
none
none of the funds we follow holds it
Insiders
| Trade date | Insider | Role | Side | Type | Shares | Avg price | Value | Filed |
|---|---|---|---|---|---|---|---|---|
| Oct 1, 2026 | William D Mosley | CEO | Sell | 10b5-1 plan | 18,998 | $914.67 | $17.4M | Oct 2 |
| Oct 1, 2026 | William D Mosley | CEO | Sell | 10b5-1 plan | 11,002 | $935.60 | $10.3M | Oct 2 |
| Sep 21, 2026 | John Christopher Morris | CTO | Sell | 10b5-1 plan | 9,354 | $877.91 | $8.2M | Sep 22 |
| Sep 15, 2026 | John Christopher Morris | CTO | Sell | unplanned | 15,465.5 | $772.15 | $11.9M | Sep 16 |
| Sep 15, 2026 | Ban Seng Teh | EVP | Sell | 10b5-1 plan | 52,730 | $782.08 | $41.2M | Sep 16 |
| Sep 15, 2026 | William D Mosley | CEO | Sell | unplanned | 97,889.25 | $772.14 | $75.6M | Sep 16 |
| Sep 15, 2026 | Gianluca Romano | CFO | Sell | unplanned | 49,983.5 | $772.16 | $38.6M | Sep 16 |
| Sep 14, 2026 | William D Mosley | CEO | Sell | unplanned | 1,869.75 | $781.23 | $1.5M | Sep 15 |
| Sep 14, 2026 | Gianluca Romano | CFO | Sell | 10b5-1 plan | 5,555 | $841.95 | $4.7M | Sep 15 |
| Sep 14, 2026 | John Christopher Morris | CTO | Sell | unplanned | 492.75 | $781.23 | $385K | Sep 15 |
| Sep 14, 2026 | Ban Seng Teh | EVP | Sell | 10b5-1 plan | 989 | $779.00 | $770.4K | Sep 15 |
| Sep 11, 2026 | Gianluca Romano | CFO | Sell | 10b5-1 plan | 45,898 | $830.01 | $38.1M | Sep 15 |
| Sep 10, 2026 | William D Mosley | CEO | Sell | unplanned | 2,849.25 | $862.13 | $2.5M | Sep 11 |
| Sep 10, 2026 | Gianluca Romano | CFO | Sell | unplanned | 1,348 | $862.13 | $1.2M | Sep 11 |
| Sep 10, 2026 | John Christopher Morris | CTO | Sell | unplanned | 572.25 | $862.13 | $493.4K | Sep 11 |
| Sep 10, 2026 | Ban Seng Teh | EVP | Sell | 10b5-1 plan | 663 | $860.09 | $570.2K | Sep 11 |
| Sep 1, 2026 | Yolanda Lee Conyers | Director | Sell | 10b5-1 plan | 750 | $815.11 | $611.3K | Sep 3 |
| Sep 1, 2026 | William D Mosley | CEO | Sell | 10b5-1 plan | 30,000 | $816.28 | $24.5M | Sep 3 |
| Aug 24, 2026 | James Ci Lee | EVP | Sell | 10b5-1 plan | 9,013 | $794.84 | $7.2M | Aug 26 |
| Aug 21, 2026 | William D Mosley | CEO | Sell | unplanned | 18,138.5 | $849.35 | $15.4M | Aug 24 |
| Aug 21, 2026 | Gianluca Romano | CFO | Sell | unplanned | 9,076.25 | $849.35 | $7.7M | Aug 24 |
| Aug 21, 2026 | James Ci Lee | EVP | Sell | unplanned | 3,938.75 | $849.35 | $3.3M | Aug 24 |
| Aug 21, 2026 | John Christopher Morris | CTO | Sell | 10b5-1 plan | 4,038.5 | $847.57 | $3.4M | Aug 24 |
| Aug 21, 2026 | Ban Seng Teh | EVP | Sell | 10b5-1 plan | 9,862 | $852.97 | $8.4M | Aug 24 |
| Aug 20, 2026 | Ban Seng Teh | EVP | Sell | 10b5-1 plan | 6,048 | $842.97 | $5.1M | Aug 24 |
| Aug 13, 2026 | Ban Seng Teh | EVP | Sell | unplanned | 7,361 | $920.80 | $6.8M | Aug 14 |
| Aug 7, 2026 | Gianluca Romano | CFO | Sell | 10b5-1 plan | 7,240 | $781.64 | $5.7M | Aug 11 |
| Aug 7, 2026 | Gianluca Romano | CFO | Sell | 10b5-1 plan | 14,091 | $811.25 | $11.4M | Aug 11 |
| Aug 7, 2026 | Gianluca Romano | CFO | Sell | 10b5-1 plan | 880 | $845.12 | $743.7K | Aug 11 |
| Aug 3, 2026 | William D Mosley | CEO | Sell | 10b5-1 plan | 12,920 | $803.47 | $10.4M | Aug 4 |
| Aug 3, 2026 | William D Mosley | CEO | Sell | 10b5-1 plan | 17,080 | $827.30 | $14.1M | Aug 4 |
| Aug 3, 2026 | John Christopher Morris | CTO | Sell | 10b5-1 plan | 168 | $817.76 | $137.4K | Aug 4 |
| Jul 30, 2026 | James Ci Lee | EVP | Sell | 10b5-1 plan | 694 | $877.45 | $609K | Aug 3 |
| Jul 23, 2026 | James Ci Lee | EVP | Sell | unplanned | 542.25 | $905.01 | $490.7K | Jul 24 |
| Jul 1, 2026 | William D Mosley | CEO | Sell | 10b5-1 plan | 20,657 | $910.48 | $18.8M | Jul 2 |
| Jul 1, 2026 | William D Mosley | CEO | Sell | 10b5-1 plan | 9,343 | $924.42 | $8.6M | Jul 2 |
| Jun 12, 2026 | William D Mosley | CEO | Sell | unplanned | 1,768.25 | $880.19 | $1.6M | Jun 15 |
| Jun 12, 2026 | Gianluca Romano | CFO | Sell | unplanned | 903.25 | $880.19 | $795K | Jun 15 |
| Jun 12, 2026 | Ban Seng Teh | EVP | Sell | 10b5-1 plan | 989 | $880.19 | $870.5K | Jun 15 |
| Jun 12, 2026 | John Christopher Morris | CTO | Sell | 10b5-1 plan | 1,364 | $880.19 | $1.2M | Jun 15 |
| Jun 10, 2026 | Gianluca Romano | CFO | Sell | unplanned | 1,350.5 | $821.76 | $1.1M | Jun 11 |
| Jun 10, 2026 | William D Mosley | CEO | Sell | unplanned | 2,854.75 | $821.74 | $2.3M | Jun 11 |
| Jun 10, 2026 | John Christopher Morris | CTO | Sell | unplanned | 573.75 | $821.66 | $471.4K | Jun 11 |
| Jun 10, 2026 | Ban Seng Teh | EVP | Sell | 10b5-1 plan | 663 | $821.86 | $544.9K | Jun 11 |
| Jun 4, 2026 | Shankar Arumugavelu | Director | Sell | unplanned | 1,000 | $927.68 | $927.7K | Jun 4 |
| Jun 2, 2026 | Prat Bhatt | Director | Sell | 10b5-1 plan | 1,000 | $929.88 | $929.9K | Jun 2 |
| Jun 1, 2026 | William D Mosley | CEO | Sell | 10b5-1 plan | 16,220 | $900.21 | $14.6M | Jun 2 |
| Jun 1, 2026 | William D Mosley | CEO | Sell | 10b5-1 plan | 13,780 | $924.99 | $12.7M | Jun 2 |
| Jun 1, 2026 | Yolanda Lee Conyers | Director | Sell | 10b5-1 plan | 750 | $885.33 | $664K | Jun 2 |
| May 20, 2026 | William D Mosley | CEO | Sell | 10b5-1 plan | 30,000 | $751.29 | $22.5M | May 21 |
| May 14, 2026 | Ban Seng Teh | EVP | Sell | 10b5-1 plan | 15,560 | $815.42 | $12.7M | May 14 |
| May 7, 2026 | Gianluca Romano | CFO | Sell | 10b5-1 plan | 1,902 | $770.00 | $1.5M | May 8 |
| May 6, 2026 | Gianluca Romano | CFO | Sell | 10b5-1 plan | 22,488 | $774.22 | $17.4M | May 8 |
| May 5, 2026 | Stephanie Tilenius | Director | Sell | unplanned | 1,580 | $766.61 | $1.2M | May 6 |
| May 4, 2026 | James Ci Lee | EVP | Sell | 10b5-1 plan | 697 | $741.17 | $516.6K | May 6 |
| May 4, 2026 | John Christopher Morris | CTO | Sell | 10b5-1 plan | 5,626 | $738.37 | $4.2M | May 6 |
| Apr 22, 2026 | James Ci Lee | EVP | Tax | tax withholding | 540 | $579.88 | $313.1K | Apr 23 |
| Apr 1, 2026 | William D Mosley | CEO | Sell | 10b5-1 plan | 20,000 | $420.73 | $8.4M | Apr 2 |
| Mar 19, 2026 | William D Mosley | CEO | Sell | unplanned | 24,584 | $406.77 | $10M | Mar 23 |
| Mar 13, 2026 | John Christopher Morris | CTO | Sell | 10b5-1 plan | 112 | $377.44 | $42.3K | Mar 16 |
| Mar 11, 2026 | William D Mosley | CEO | Tax | tax withholding | 1,658 | $385.97 | $639.9K | Mar 12 |
| Mar 11, 2026 | John Christopher Morris | CTO | Tax | tax withholding | 430 | $385.97 | $166K | Mar 12 |
| Mar 11, 2026 | Gianluca Romano | CFO | Tax | tax withholding | 847 | $385.97 | $326.9K | Mar 12 |
| Mar 9, 2026 | William D Mosley | CEO | Tax | tax withholding | 2,613 | $374.33 | $978.1K | Mar 11 |
| Mar 9, 2026 | Gianluca Romano | CFO | Tax | tax withholding | 1,236 | $374.33 | $462.7K | Mar 11 |
| Mar 9, 2026 | John Christopher Morris | CTO | Tax | tax withholding | 516 | $374.33 | $193.2K | Mar 11 |
| Mar 2, 2026 | Yolanda Lee Conyers | Director | Sell | 10b5-1 plan | 750 | $393.59 | $295.2K | Mar 3 |
| Mar 2, 2026 | William D Mosley | CEO | Sell | 10b5-1 plan | 20,000 | $384.76 | $7.7M | Mar 3 |
| Feb 24, 2026 | John Christopher Morris | CTO | Sell | 10b5-1 plan | 240 | $410.00 | $98.4K | Feb 25 |
| Feb 23, 2026 | Kian Fatt Chong | EVP | Sell | unplanned | 5,846 | $416.48 | $2.4M | Feb 23 |
| Feb 22, 2026 | Gianluca Romano | CFO | Tax | tax withholding | 13,071 | $411.11 | $5.4M | Feb 23 |
| Feb 20, 2026 | John Christopher Morris | CTO | Tax | tax withholding | 2,032 | $411.11 | $835.4K | Feb 23 |
| Feb 20, 2026 | William D Mosley | CEO | Tax | tax withholding | 5,966 | $411.11 | $2.5M | Feb 23 |
| Feb 2, 2026 | William D Mosley | CEO | Sell | 10b5-1 plan | 20,000 | $429.27 | $8.6M | Feb 3 |
| Jan 30, 2026 | Jay L Geldmacher | Director | Sell | unplanned | 925 | $448.02 | $414.4K | Feb 2 |
| Jan 29, 2026 | Ban Seng Teh | EVP | Sell | unplanned | 20,195 | $442.29 | $8.9M | Feb 2 |
| Jan 26, 2026 | James Ci Lee | EVP | Sell | 10b5-1 plan | 673 | $348.85 | $234.8K | Jan 28 |
| Jan 22, 2026 | James Ci Lee | EVP | Tax | tax withholding | 564 | $346.53 | $195.4K | Jan 26 |
| Jan 12, 2026 | Ban Seng Teh | EVP | Sell | 10b5-1 plan | 1,412 | $299.31 | $422.6K | Jan 14 |
| Jan 2, 2026 | William D Mosley | CEO | Sell | 10b5-1 plan | 20,000 | $285.56 | $5.7M | Jan 6 |
| Dec 15, 2025 | John Christopher Morris | CTO | Sell | 10b5-1 plan | 113 | $291.89 | $33K | Dec 16 |
| Dec 11, 2025 | William D Mosley | CEO | Tax | tax withholding | 1,678 | $307.85 | $516.6K | Dec 12 |
| Dec 11, 2025 | Ban Seng Teh | EVP | Sell | 10b5-1 plan | 2,010 | $295.90 | $594.8K | Dec 12 |
| Dec 11, 2025 | John Christopher Morris | CTO | Tax | tax withholding | 430 | $307.85 | $132.4K | Dec 12 |
| Dec 11, 2025 | Gianluca Romano | CFO | Tax | tax withholding | 857 | $307.85 | $263.8K | Dec 12 |
| Dec 9, 2025 | William D Mosley | CEO | Tax | tax withholding | 2,644 | $282.86 | $747.9K | Dec 11 |
| Dec 9, 2025 | Gianluca Romano | CFO | Tax | tax withholding | 1,251 | $282.86 | $353.9K | Dec 11 |
| Dec 9, 2025 | John Christopher Morris | CTO | Tax | tax withholding | 516 | $282.86 | $146K | Dec 11 |
| Dec 2, 2025 | Yolanda Lee Conyers | Director | Sell | 10b5-1 plan | 750 | $272.91 | $204.7K | Dec 2 |
| Dec 1, 2025 | William D Mosley | CEO | Sell | 10b5-1 plan | 20,000 | $271.03 | $5.4M | Dec 2 |
| Nov 13, 2025 | Gianluca Romano | CFO | Sell | 10b5-1 plan | 8,002 | $266.69 | $2.1M | Nov 14 |
| Nov 12, 2025 | Gianluca Romano | CFO | Sell | 10b5-1 plan | 54,021 | $285.16 | $15.4M | Nov 14 |
| Nov 11, 2025 | Ban Seng Teh | EVP | Sell | 10b5-1 plan | 1,412 | $288.98 | $408K | Nov 12 |
| Nov 11, 2025 | James Ci Lee | EVP | Sell | 10b5-1 plan | 697 | $288.98 | $201.4K | Nov 12 |
| Nov 10, 2025 | Shankar Arumugavelu | Director | Sell | unplanned | 5,000 | $294.56 | $1.5M | Nov 12 |
| Nov 5, 2025 | Ban Seng Teh | EVP | Sell | unplanned | 6,000 | $270.00 | $1.6M | Nov 5 |
| Nov 3, 2025 | William D Mosley | CEO | Sell | 10b5-1 plan | 20,000 | $262.82 | $5.3M | Nov 5 |
| Nov 3, 2025 | Stephanie Tilenius | Director | Sell | unplanned | 2,046 | $266.41 | $545.1K | Nov 5 |
| Oct 31, 2025 | Jay L Geldmacher | Director | Sell | unplanned | 1,250 | $269.10 | $336.4K | Nov 3 |
| Oct 30, 2025 | Kian Fatt Chong | EVP | Sell | unplanned | 7,078 | $272.14 | $1.9M | Nov 3 |
| Oct 22, 2025 | James Ci Lee | EVP | Tax | tax withholding | 540 | $215.05 | $116.1K | Oct 24 |
| Oct 19, 2025 | Mark Adams | Director | Tax | tax withholding | 647 | $225.40 | $145.8K | Oct 21 |
| Oct 19, 2025 | Jay L Geldmacher | Director | Tax | tax withholding | 647 | $225.40 | $145.8K | Oct 21 |
| Oct 19, 2025 | Yolanda Lee Conyers | Director | Tax | tax withholding | 647 | $225.40 | $145.8K | Oct 21 |
| Oct 19, 2025 | Richard L Clemmer | Director | Tax | tax withholding | 647 | $225.40 | $145.8K | Oct 21 |
| Oct 19, 2025 | Stephanie Tilenius | Director | Tax | tax withholding | 647 | $225.40 | $145.8K | Oct 21 |
| Oct 19, 2025 | Dylan G. Haggart | Director | Tax | tax withholding | 647 | $225.40 | $145.8K | Oct 21 |
| Oct 19, 2025 | Prat Bhatt | Director | Tax | tax withholding | 647 | $225.40 | $145.8K | Oct 21 |
| Oct 19, 2025 | Michael R Cannon | Director | Tax | tax withholding | 823 | $225.40 | $185.5K | Oct 21 |
| Oct 19, 2025 | Judy Bruner | Director | Tax | tax withholding | 647 | $225.40 | $145.8K | Oct 21 |
| Oct 19, 2025 | Shankar Arumugavelu | Director | Tax | tax withholding | 647 | $225.40 | $145.8K | Oct 21 |
| Oct 13, 2025 | Ban Seng Teh | EVP | Sell | 10b5-1 plan | 1,410 | $225.56 | $318K | Oct 15 |
| Oct 1, 2025 | William D Mosley | CEO | Sell | 10b5-1 plan | 20,000 | $249.90 | $5M | Oct 3 |
| Sep 16, 2025 | John Christopher Morris | CTO | Sell | 10b5-1 plan | 377 | $211.26 | $79.6K | Sep 17 |
| Sep 14, 2025 | Gianluca Romano | CFO | Tax | tax withholding | 12,069 | $196.05 | $2.4M | Sep 15 |
| Sep 14, 2025 | John Christopher Morris | CTO | Tax | tax withholding | 3,593 | $196.09 | $704.5K | Sep 15 |
| Sep 14, 2025 | William D Mosley | CEO | Tax | tax withholding | 34,609 | $196.03 | $6.8M | Sep 15 |
| Sep 12, 2025 | John Christopher Morris | CTO | Sell | 10b5-1 plan | 15,347 | $195.80 | $3M | Sep 15 |
| Sep 11, 2025 | Ban Seng Teh | EVP | Sell | 10b5-1 plan | 3,732 | $193.30 | $721.4K | Sep 15 |
Officers, directors and 10% owners file SEC Form 4 within two business days. Unplanned: the insider chose to trade now, the trades worth attention; their dollars make the net above. 10b5-1 plan: scheduled in advance, kept for the record. Tax: shares withheld on vesting stock, not a market trade. Awards, option exercises and gifts are left out. Source: SEC EDGAR, collected daily for the stocks discussed on Reddit.
Congress
| Trade date | Member | Chamber | Side | Amount | Disclosed |
|---|---|---|---|---|---|
| Sep 30, 2026 | Lisa McClain | House | Sell | $15K–$50K | Oct 12 |
| Mar 27, 2026 | Alan Armstrong | Senate | Buy | $1K–$15K | Jul 21 |
| Dec 18, 2025 | Julie Johnson | House | Sell | $1K–$15K | Jan 15 |
| Nov 13, 2025 | Julie Johnson | House | Sell | $1K–$15K | Dec 11 |
| Oct 28, 2025 | Kevin Hern | House | Sell | $15K–$50K | Nov 16 |
Members of Congress report trades within 45 days of the trade date, so these are never real-time. Amounts are disclosed as ranges; the net uses each range's midpoint (≈). Source: House and Senate periodic transaction reports via CongressInvests, refreshed daily.
Funds
Who holds it
None of the investors we follow holds STX in their latest portfolio.
Their moves
No moves in STX by the investors we follow.
Well-known investors we follow (Buffett, Ackman, Icahn, Druckenmiller, Tepper, Soros and others). 13F: managers report their US stock holdings up to 45 days after each quarter; the change from the quarter before is dated by the filing, the trades happened some time in the quarter, and the value is at the quarter-end price (≈). New and closed positions, and adds or cuts of 20% or more, of positions at least 0.2% of the portfolio. ARK: Cathie Wood's ETFs publish their holdings every morning; the change beyond the fund's own inflows and outflows, dated by the session it traded. 5%+ stake: Schedule 13D (with intent to influence) or 13G (passive), filed within days. Source: SEC EDGAR, ark-funds.com, refreshed daily. Who holds it: each investor's latest 13F portfolio (positions at the quarter's end; one sold since would not show until the next filing), and ARK's ETFs as of their latest daily file. The funds we follow and their portfolios · All recent insider, congressional and fund moves