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STX · Seagate Technology Holdings plc

Everything on this page is public record — SEC Form 4 filings and congressional disclosures — alongside any INSIDER SCANNER research case for this company.

Open-market buys0
Open-market sells53
Research cases0
Last filing2026-10-01

Insider flow: Selling only — a count of disclosed transactions, not a rating or a recommendation.

Insider transaction timeline

Every reported transaction, positioned by trade date. Purchases sit above the axis, sales below; circle area is proportional to dollar value. No share-price line is drawn — this feed carries transaction prices only, and a price history inferred from them would imply market data the filings do not contain.

Open-market purchase Open-market sale
2026-09-21 — Morris John Christopher · sold 1,000 @ $872.42 2026-09-21 — Morris John Christopher · sold 1,040 @ $873.49 2026-09-21 — Morris John Christopher · sold 120 @ $887.92 2026-09-21 — Morris John Christopher · sold 160 @ $868.11 2026-09-21 — Morris John Christopher · sold 200 @ $881.90 2026-09-21 — Morris John Christopher · sold 280 @ $878.38 2026-09-21 — Morris John Christopher · sold 320 @ $883.08 2026-09-21 — Morris John Christopher · sold 40 @ $893.15 2026-09-21 — Morris John Christopher · sold 418 @ $877.36 2026-09-21 — Morris John Christopher · sold 520 @ $871.56 2026-09-21 — Morris John Christopher · sold 741 @ $881.16 2026-09-21 — Morris John Christopher · sold 760 @ $876.54 2026-09-21 — Morris John Christopher · sold 80 @ $897.28 2026-09-21 — Morris John Christopher · sold 915 @ $894.27 2026-09-21 — Morris John Christopher · sold 974 @ $875.35 2026-09-21 — Morris John Christopher · sold 986 @ $874.50 2026-10-01 — MOSLEY WILLIAM D · sold 360 @ $898.10 2026-10-01 — MOSLEY WILLIAM D · sold 517 @ $900.46 2026-10-01 — MOSLEY WILLIAM D · sold 440 @ $901.49 2026-10-01 — MOSLEY WILLIAM D · sold 384 @ $902.55 2026-10-01 — MOSLEY WILLIAM D · sold 696 @ $913.08 2026-10-01 — MOSLEY WILLIAM D · sold 480 @ $926.78 2026-10-01 — MOSLEY WILLIAM D · sold 601 @ $906.42 2026-10-01 — MOSLEY WILLIAM D · sold 560 @ $907.43 2026-10-01 — MOSLEY WILLIAM D · sold 1,027 @ $908.58 2026-10-01 — MOSLEY WILLIAM D · sold 307 @ $909.84 2026-10-01 — MOSLEY WILLIAM D · sold 840 @ $919.56 2026-10-01 — MOSLEY WILLIAM D · sold 1,146 @ $912.04 2026-10-01 — MOSLEY WILLIAM D · sold 904 @ $913.94 2026-10-01 — MOSLEY WILLIAM D · sold 960 @ $915.01 2026-10-01 — MOSLEY WILLIAM D · sold 400 @ $917.22 2026-10-01 — MOSLEY WILLIAM D · sold 920 @ $918.49 2026-10-01 — MOSLEY WILLIAM D · sold 630 @ $920.62 2026-10-01 — MOSLEY WILLIAM D · sold 930 @ $921.63 2026-10-01 — MOSLEY WILLIAM D · sold 800 @ $922.66 2026-10-01 — MOSLEY WILLIAM D · sold 760 @ $923.78 2026-10-01 — MOSLEY WILLIAM D · sold 640 @ $927.90 2026-10-01 — MOSLEY WILLIAM D · sold 1,080 @ $925.88 2026-10-01 — MOSLEY WILLIAM D · sold 360 @ $929.01 2026-10-01 — MOSLEY WILLIAM D · sold 855 @ $930.03 2026-10-01 — MOSLEY WILLIAM D · sold 1,665 @ $930.99 2026-10-01 — MOSLEY WILLIAM D · sold 1,320 @ $932.04 2026-10-01 — MOSLEY WILLIAM D · sold 840 @ $933.28 2026-10-01 — MOSLEY WILLIAM D · sold 822 @ $934.35 2026-10-01 — MOSLEY WILLIAM D · sold 640 @ $938.32 2026-10-01 — MOSLEY WILLIAM D · sold 759 @ $936.43 2026-10-01 — MOSLEY WILLIAM D · sold 579 @ $937.33 2026-10-01 — MOSLEY WILLIAM D · sold 720 @ $939.27 2026-10-01 — MOSLEY WILLIAM D · sold 80 @ $940.20 2026-10-01 — MOSLEY WILLIAM D · sold 40 @ $941.22 2026-10-01 — MOSLEY WILLIAM D · sold 280 @ $943.21 2026-10-01 — MOSLEY WILLIAM D · sold 440 @ $944.81 2026-10-01 — MOSLEY WILLIAM D · sold 962 @ $945.97
2026-09-212026-10-01

Insider participation

One row per insider, one cell per reported transaction, shaded by value. Repeat buying and activity clustered in time are visible at a glance.

MOSLEY WILLIAM D CEO, Director
Morris John Christopher EVP & CTO
Included with a free account

The analysis built on top of these filings

The filings above are public record and stay public here. What an account adds for $STX is the reading of them — and for this company, that is what the list below says it is, no more.

  • Transaction timelineThe [{'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 360.0, 'price': 898.0956, 'value': 323314.42, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 517.0, 'price': 900.4618, 'value': 465538.75, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 440.0, 'price': 901.4882, 'value': 396654.81, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 384.0, 'price': 902.5483, 'value': 346578.55, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 696.0, 'price': 913.0784, 'value': 635502.57, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 480.0, 'price': 926.7758, 'value': 444852.38, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 601.0, 'price': 906.4232, 'value': 544760.34, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 560.0, 'price': 907.4321, 'value': 508161.98, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 1027.0, 'price': 908.5781, 'value': 933109.71, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 307.0, 'price': 909.8444, 'value': 279322.23, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 840.0, 'price': 919.5576, 'value': 772428.38, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 1146.0, 'price': 912.0438, 'value': 1045202.19, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 904.0, 'price': 913.9418, 'value': 826203.39, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 960.0, 'price': 915.0083, 'value': 878407.97, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 400.0, 'price': 917.222, 'value': 366888.8, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 920.0, 'price': 918.4922, 'value': 845012.82, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 630.0, 'price': 920.616, 'value': 579988.08, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 930.0, 'price': 921.635, 'value': 857120.55, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 800.0, 'price': 922.6575, 'value': 738126.0, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 760.0, 'price': 923.7821, 'value': 702074.4, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 640.0, 'price': 927.8963, 'value': 593853.63, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 1080.0, 'price': 925.8826, 'value': 999953.21, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 360.0, 'price': 929.0089, 'value': 334443.2, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 855.0, 'price': 930.0334, 'value': 795178.56, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 1665.0, 'price': 930.994, 'value': 1550105.01, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 1320.0, 'price': 932.0368, 'value': 1230288.58, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 840.0, 'price': 933.2762, 'value': 783952.01, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 822.0, 'price': 934.3513, 'value': 768036.77, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 640.0, 'price': 938.3194, 'value': 600524.42, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 759.0, 'price': 936.4299, 'value': 710750.29, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 579.0, 'price': 937.3285, 'value': 542713.2, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 720.0, 'price': 939.2706, 'value': 676274.83, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 80.0, 'price': 940.2, 'value': 75216.0, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 40.0, 'price': 941.22, 'value': 37648.8, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 280.0, 'price': 943.2129, 'value': 264099.61, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 440.0, 'price': 944.8064, 'value': 415714.82, 'is_buy': False}, {'transaction_date': '2026-10-01', 'insider_name': 'MOSLEY WILLIAM D', 'insider_title': 'CEO, Director', 'transaction_type': 'Open-market sell', 'shares': 962.0, 'price': 945.9696, 'value': 910022.76, 'is_buy': False}, {'transaction_date': '2026-09-21', 'insider_name': 'Morris John Christopher', 'insider_title': 'EVP & CTO', 'transaction_type': 'Open-market sell', 'shares': 1000.0, 'price': 872.42, 'value': 872420.0, 'is_buy': False}, {'transaction_date': '2026-09-21', 'insider_name': 'Morris John Christopher', 'insider_title': 'EVP & CTO', 'transaction_type': 'Open-market sell', 'shares': 1040.0, 'price': 873.49, 'value': 908429.6, 'is_buy': False}, {'transaction_date': '2026-09-21', 'insider_name': 'Morris John Christopher', 'insider_title': 'EVP & CTO', 'transaction_type': 'Open-market sell', 'shares': 120.0, 'price': 887.92, 'value': 106550.4, 'is_buy': False}, {'transaction_date': '2026-09-21', 'insider_name': 'Morris John Christopher', 'insider_title': 'EVP & CTO', 'transaction_type': 'Open-market sell', 'shares': 160.0, 'price': 868.11, 'value': 138897.6, 'is_buy': False}, {'transaction_date': '2026-09-21', 'insider_name': 'Morris John Christopher', 'insider_title': 'EVP & CTO', 'transaction_type': 'Open-market sell', 'shares': 200.0, 'price': 881.9, 'value': 176380.0, 'is_buy': False}, {'transaction_date': '2026-09-21', 'insider_name': 'Morris John Christopher', 'insider_title': 'EVP & CTO', 'transaction_type': 'Open-market sell', 'shares': 280.0, 'price': 878.38, 'value': 245946.4, 'is_buy': False}, {'transaction_date': '2026-09-21', 'insider_name': 'Morris John Christopher', 'insider_title': 'EVP & CTO', 'transaction_type': 'Open-market sell', 'shares': 320.0, 'price': 883.08, 'value': 282585.6, 'is_buy': False}, {'transaction_date': '2026-09-21', 'insider_name': 'Morris John Christopher', 'insider_title': 'EVP & CTO', 'transaction_type': 'Open-market sell', 'shares': 40.0, 'price': 893.15, 'value': 35726.0, 'is_buy': False}, {'transaction_date': '2026-09-21', 'insider_name': 'Morris John Christopher', 'insider_title': 'EVP & CTO', 'transaction_type': 'Open-market sell', 'shares': 418.0, 'price': 877.36, 'value': 366736.48, 'is_buy': False}, {'transaction_date': '2026-09-21', 'insider_name': 'Morris John Christopher', 'insider_title': 'EVP & CTO', 'transaction_type': 'Open-market sell', 'shares': 520.0, 'price': 871.56, 'value': 453211.2, 'is_buy': False}, {'transaction_date': '2026-09-21', 'insider_name': 'Morris John Christopher', 'insider_title': 'EVP & CTO', 'transaction_type': 'Open-market sell', 'shares': 741.0, 'price': 881.16, 'value': 652939.56, 'is_buy': False}, {'transaction_date': '2026-09-21', 'insider_name': 'Morris John Christopher', 'insider_title': 'EVP & CTO', 'transaction_type': 'Open-market sell', 'shares': 760.0, 'price': 876.54, 'value': 666170.4, 'is_buy': False}, {'transaction_date': '2026-09-21', 'insider_name': 'Morris John Christopher', 'insider_title': 'EVP & CTO', 'transaction_type': 'Open-market sell', 'shares': 80.0, 'price': 897.28, 'value': 71782.4, 'is_buy': False}, {'transaction_date': '2026-09-21', 'insider_name': 'Morris John Christopher', 'insider_title': 'EVP & CTO', 'transaction_type': 'Open-market sell', 'shares': 915.0, 'price': 894.27, 'value': 818257.05, 'is_buy': False}, {'transaction_date': '2026-09-21', 'insider_name': 'Morris John Christopher', 'insider_title': 'EVP & CTO', 'transaction_type': 'Open-market sell', 'shares': 974.0, 'price': 875.35, 'value': 852590.9, 'is_buy': False}, {'transaction_date': '2026-09-21', 'insider_name': 'Morris John Christopher', 'insider_title': 'EVP & CTO', 'transaction_type': 'Open-market sell', 'shares': 986.0, 'price': 874.5, 'value': 862257.0, 'is_buy': False}] reported transactions plotted over the window rather than listed, so concentration is visible.

Not available for STX today: no reported open-market purchases in this window, so there is no insider cost basis to compute; no research case — nothing here has cleared the scoring threshold. Both appear on this page on their own if that changes.

A free account opens all of it.

Not financial advice. This page reports public filings and past research output. It is not a recommendation to buy or sell, and no price target here is a prediction. Trade at your own risk.