Computer Storage Devices
Standard Industrial Classification: SIC 3572
Industry Insider Sentiment Analysis
The Computer Storage Devices sector (SIC 3572) acts as a critical barometer for broader economic health. Our real-time monitoring reveals total transactions. Monitoring "cluster buying" is one of the most reliable leading indicators for future sector performance. By analyzing aggregate data across this specific Standard Industrial Classification, investors can filter out individual company volatility and identify high-conviction trends. When multiple directors and officers within the same industry move capital simultaneously, it often signals an upcoming sector-wide revaluation or a fundamental shift in supply chain dynamics that has yet to be recognized by the broader public market.
| Filing Date | Trade Date | Ticker | Company | Reporting Person | Relationship | Type | Price | Qty | Total, $ | Owned After |
|---|---|---|---|---|---|---|---|---|---|---|
| 2013-12-07 01:47 | 2013-12-04 | WDC | WESTERN DIGITAL CORP | MOORE ROGER H/CA | Director | OPT+S | $77.35 | 19,060 | $1,474,291 | 32,996 |
| 2013-12-05 00:13 | 2013-12-02 | NTAP | NetApp, Inc. | WARMENHOVEN DANIEL J | Director, Officer | OPT+S | $40.77 | 51,758 | $2,110,200 | 65,059 |
| 2013-11-29 21:05 | 2013-11-26 | NTAP | NetApp, Inc. | WARMENHOVEN DANIEL J | Director, Officer | OPT+S | $41.05 | 13,381 | $549,322 | 64,748 |
| 2013-11-27 00:22 | 2013-11-25 | STX | Seagate Technology Holdings plc | MARSHALL LYDIA MICHEAUX | Director | SELL | $49.00 | 11,998 | $587,903 | 26,990 |
| 2013-11-21 04:49 | 2013-11-18 | STX | Seagate Technology Holdings plc | MORTON DAVID H JR | Officer | OPT+S | $49.00 | 2,800 | $137,200 | 22,250 |
| 2013-11-21 04:48 | 2013-09-13 | STX | Seagate Technology Holdings plc | MORTON DAVID H JR | Officer | OPT+S | $40.40 | 12,439 | $502,513 | 22,250 |
| 2013-11-21 01:25 | 2013-11-18 | NTAP | NetApp, Inc. | WARMENHOVEN DANIEL J | Director, Officer | OPT+S | $41.12 | 6,619 | $272,195 | 64,748 |
| 2013-11-20 02:11 | 2013-11-15 | WDC | WESTERN DIGITAL CORP | MILLIGAN STEPHEN D | Director, Officer | SELL | $74.97 | 7,983 | $598,479 | 122,484 |
| 2013-11-20 02:10 | 2013-11-15 | WDC | WESTERN DIGITAL CORP | MASSENGILL MATTHEW E | Director | OPT+S | $74.52 | 33,953 | $2,530,127 | 10,772 |
| 2013-11-20 02:10 | 2013-11-18 | WDC | WESTERN DIGITAL CORP | CORDANO MICHAEL D | Officer | OPT+S | $74.96 | 2,396 | $179,602 | 90,825 |
| 2013-11-19 03:27 | 2013-11-15 | STX | Seagate Technology Holdings plc | Richarz David K | Officer | OPT+S | $48.67 | 6,290 | $306,164 | 6,210 |
| 2013-11-19 03:27 | 2013-11-15 | STX | Seagate Technology Holdings plc | MASSARONI KENNETH M | Officer | OPT+S | $50.10 | 1,750 | $87,675 | 45,455 |
| 2013-11-19 03:26 | 2013-11-14 | STX | Seagate Technology Holdings plc | O MALLEY PATRICK J | Officer | OPT+S | $49.68 | 109,683 | $5,449,183 | 33,331 |
| 2013-11-16 00:33 | 2013-11-13 | NTAP | NetApp, Inc. | WARMENHOVEN DANIEL J | Director, Officer | OPT+S | $41.05 | 30,000 | $1,231,461 | 64,748 |
| 2013-11-15 04:11 | 2013-11-14 | WDC | WESTERN DIGITAL CORP | SHAKEEL ARIF | Director | SELL | $74.83 | 10,460 | $782,741 | 4,846 |
| 2013-11-15 04:09 | 2013-11-14 | WDC | WESTERN DIGITAL CORP | Lauer Len J | Director | SELL | $75.04 | 6,000 | $450,260 | 9,958 |
| 2013-11-15 04:09 | 2013-11-12 | WDC | WESTERN DIGITAL CORP | LAMBERT MICHAEL D | Director | SELL | $71.85 | 10,000 | $718,500 | 15,306 |
| 2013-11-15 04:09 | 2013-11-14 | WDC | WESTERN DIGITAL CORP | KIMSEY WILLIAM L | Director | SELL | $74.77 | 11,414 | $853,469 | 17,426 |
| 2013-11-15 04:08 | 2013-11-14 | WDC | WESTERN DIGITAL CORP | DENERO HENRY T | Director | SELL | $74.77 | 3,885 | $290,465 | 24,413 |
| 2013-11-15 04:08 | 2013-11-13 | WDC | WESTERN DIGITAL CORP | COTE KATHLEEN A | Director | SELL | $72.22 | 10,000 | $722,205 | 5,306 |
| 2013-11-13 01:04 | 2013-11-07 | STX | Seagate Technology Holdings plc | DEHAAN DOUGLAS J | Officer | OPT+S | $47.51 | 63,470 | $3,015,644 | 0 |
| 2013-11-13 04:58 | 2013-11-12 | WDC | WESTERN DIGITAL CORP | PARDUN THOMAS E | Director | OPT+S | $71.49 | 6,000 | $428,940 | 27,508 |
| 2013-11-13 04:55 | 2013-11-12 | WDC | WESTERN DIGITAL CORP | KIMSEY WILLIAM L | Director | OPT+S | $72.27 | 14,912 | $1,077,668 | 28,840 |
| 2013-11-13 04:55 | 2013-11-08 | WDC | WESTERN DIGITAL CORP | DENERO HENRY T | Director | OPT+S | $71.12 | 31,314 | $2,226,980 | 28,298 |
| 2013-11-09 00:13 | 2013-11-06 | STX | Seagate Technology Holdings plc | Pimentel Albert A | Officer | OPT+S | $48.51 | 10,000 | $485,120 | 31,170 |
| 2013-11-09 00:09 | 2013-11-06 | STX | Seagate Technology Holdings plc | COLEMAN WILLIAM T III | Director | BUY | $48.54 | 1,742 | $84,549 | 21,165 |
| 2013-11-07 14:31 | 2013-11-07 | WDC | WESTERN DIGITAL CORP | HITACHI LTD | SELL | $64.81 | 12,500,000 | $810,125,000 | 12,500,000 | |
| 2013-11-06 01:23 | 2013-11-01 | STX | Seagate Technology Holdings plc | DEHAAN DOUGLAS J | Officer | SELL | $48.39 | 5,705 | $276,071 | 30,102 |
| 2013-11-06 01:23 | 2013-11-01 | STX | Seagate Technology Holdings plc | LUCZO STEPHEN J | Director, Officer | OPT+S | $48.98 | 513,400 | $25,148,437 | 503,101 |
| 2013-11-06 01:19 | 2013-11-01 | STX | Seagate Technology Holdings plc | MASSARONI KENNETH M | Officer | OPT+S | $48.45 | 15,850 | $767,907 | 45,455 |
| 2013-11-06 01:18 | 2013-11-01 | STX | Seagate Technology Holdings plc | MOSLEY WILLIAM D | Officer | SELL | $48.38 | 41,600 | $2,012,683 | 56,406 |
| 2013-11-06 01:18 | 2013-11-01 | STX | Seagate Technology Holdings plc | O MALLEY PATRICK J | Officer | SELL | $48.34 | 32,282 | $1,560,622 | 33,331 |
| 2013-11-06 01:17 | 2013-11-01 | STX | Seagate Technology Holdings plc | PARK CHONG SUP | Director | SELL | $49.17 | 3,000 | $147,522 | 34,836 |
| 2013-11-06 01:17 | 2013-11-01 | STX | Seagate Technology Holdings plc | Pimentel Albert A | Officer | SELL | $48.62 | 655 | $31,846 | 31,170 |
| 2013-11-06 01:16 | 2013-11-01 | STX | Seagate Technology Holdings plc | RE MARK | Officer | SELL | $48.61 | 7,470 | $363,144 | 58,353 |
| 2013-11-06 01:15 | 2013-11-01 | STX | Seagate Technology Holdings plc | REYES GREGORIO | Director | SELL | $49.24 | 4,822 | $237,421 | 1,698 |
| 2013-11-06 01:15 | 2013-11-01 | STX | Seagate Technology Holdings plc | Richarz David K | Officer | OPT+S | $49.12 | 135,995 | $6,679,748 | 0 |
| 2013-11-06 01:04 | 2013-11-01 | NTAP | NetApp, Inc. | WARMENHOVEN DANIEL J | Director, Officer | OPT+S | $38.98 | 41,758 | $1,627,848 | 64,748 |
| 2013-10-31 01:59 | 2013-10-28 | WDC | WESTERN DIGITAL CORP | NICKL WOLFGANG U. | Officer | OPT+S | $72.55 | 21,353 | $1,549,135 | 53,609 |
| 2013-10-29 03:24 | 2013-05-06 | STX | Seagate Technology Holdings plc | BIONDI FRANK | Director | OPT+S | $42.05 | 19,374 | $814,659 | 9,485 |
| 2013-10-24 02:45 | 2013-10-21 | WDC | WESTERN DIGITAL CORP | CORDANO MICHAEL D | Officer | SELL | $71.80 | 2,860 | $205,347 | 90,825 |
| 2013-10-23 23:00 | 2013-10-21 | NTAP | NetApp, Inc. | WARMENHOVEN DANIEL J | Director, Officer | OPT+S | $41.54 | 10,000 | $415,393 | 64,748 |
| 2013-10-23 02:14 | 2013-10-18 | STX | Seagate Technology Holdings plc | LUCZO STEPHEN J | Director, Officer | SELL | $50.01 | 350,000 | $17,502,310 | 1,304,500 |
| 2013-10-22 19:14 | 2013-10-21 | STX | Seagate Technology Holdings plc | SAMSUNG ELECTRONICS CO LTD /FI | 10% owner | SELL | $46.03 | 32,700,000 | $1,505,181,000 | 12,539,490 |
| 2013-10-17 23:03 | 2013-10-15 | STX | Seagate Technology Holdings plc | MASSARONI KENNETH M | Officer | OPT+S | $46.99 | 2,750 | $129,223 | 59,555 |
| 2013-10-16 23:00 | 2013-10-14 | NTAP | NetApp, Inc. | WARMENHOVEN DANIEL J | Director, Officer | OPT+S | $41.69 | 10,000 | $416,878 | 64,748 |
| 2013-10-10 01:06 | 2013-10-07 | NTAP | NetApp, Inc. | WARMENHOVEN DANIEL J | Director, Officer | OPT+S | $42.01 | 10,000 | $420,113 | 64,748 |
| 2013-10-04 00:08 | 2013-10-01 | STX | Seagate Technology Holdings plc | MASSARONI KENNETH M | Officer | OPT+S | $43.69 | 5,750 | $251,218 | 59,555 |
| 2013-10-03 01:57 | 2013-09-30 | NTAP | NetApp, Inc. | WARMENHOVEN DANIEL J | Director, Officer | OPT+S | $42.67 | 51,758 | $2,208,685 | 64,748 |
| 2013-09-28 01:42 | 2013-09-25 | WDC | WESTERN DIGITAL CORP | MILLIGAN STEPHEN D | Director, Officer | OPT+S | $65.00 | 7,712 | $501,280 | 130,467 |
Sector-Wide Insider Alpha
Analyzing insider movements across the Computer Storage Devices sector provides a macro-view of executive conviction. When multiple leaders in different companies within the same SIC code (3572) simultaneously buy shares, it often indicates an industry-wide undervaluation or a positive shift in market cycles.
SEC Filings in Computer Storage Devices
Every transaction in the Computer Storage Devices industry is reported via Form 4 disclosures. By filtering these filings by industry, investors can detect institutional-scale sentiment shifts before they are reflected in broader market indices, following the capital flow of those with intimate industry knowledge.
UNDERSTANDING THE DATA
FILING DATE: The date and time when the transaction was reported to the SEC. This is when the public first receives the information.
TRADE DATE: The actual day the insider executed the purchase or sale in the market.
INDUSTRY: The specific market sector the company operates in. Useful for identifying broader institutional capital flows across sectors.
OWNED AFTER: The total number of shares held by the insider following the transaction. This highlights the insider's remaining conviction in the company.
CHANGE %: The percentage increase or decrease of the insider's total position. Large percentage changes often carry more weight than the dollar amount alone.
TRADE TYPES DEFINITIONS
BUY: An open market purchase. Typically indicates an insider's belief that the stock is undervalued or poised for growth.
SELL: An open market sale. While often used for diversification or liquidity, large or unexpected sales can be a warning signal.
OPT+S (OPTION EXERCISE & SALE): This occurs when an insider exercises their stock options and sells them immediately. Often part of a structured compensation plan.