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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2017-01-09 20:47 | 2017-01-06 | PSTG | Everpure, Inc. | Volpi Michelangelo | Director | SELL | $12.03 | 251,000 | $3,020,710 | 74,753 |
| 2017-01-06 20:08 | 2017-01-05 | PSTG | Everpure, Inc. | Volpi Michelangelo | Director | SELL | $12.01 | 250,000 | $3,001,500 | 77,890 |
| 2017-01-05 00:25 | 2017-01-03 | NTAP | NetApp, Inc. | REICH JOEL D | Officer | SELL | $36.04 | 393 | $14,165 | 0 |
| 2017-01-05 00:25 | 2016-12-30 | NTAP | NetApp, Inc. | Kurian George | Director, Officer | SELL | $35.84 | 4,000 | $143,360 | 36,396 |
| 2017-01-04 04:04 | 2016-12-21 | WDC | WESTERN DIGITAL CORP | CORDANO MICHAEL D | Officer | SELL | $71.25 | 1,696 | $120,840 | 55,871 |
| 2016-12-28 23:33 | 2016-12-23 | PSTG | Everpure, Inc. | Riitters Timothy | Officer | SELL | $11.75 | 4,900 | $57,575 | 18,420 |
| 2016-12-23 01:14 | 2016-12-21 | PSTG | Everpure, Inc. | Riitters Timothy | Officer | SELL | $11.75 | 3,449 | $40,512 | 23,320 |
| 2016-12-23 00:08 | 2016-12-21 | PSTG | Everpure, Inc. | Volpi Michelangelo | Director | SELL | $12.02 | 3,700 | $44,466 | 81,015 |
| 2016-12-21 04:43 | 2016-12-16 | PSTG | Everpure, Inc. | Volpi Michelangelo | Director | SELL | $12.01 | 344,500 | $4,136,377 | 81,061 |
| 2016-12-17 01:07 | 2016-12-15 | PSTG | Everpure, Inc. | Riitters Timothy | Officer | SELL | $11.94 | 5,000 | $59,681 | 26,769 |
| 2016-12-16 00:19 | 2016-12-14 | NTAP | NetApp, Inc. | EARHART ALAN L | Director | SELL | $36.25 | 6,166 | $223,518 | 11,611 |
| 2016-12-16 00:19 | 2016-12-13 | NTAP | NetApp, Inc. | HELD GERALD | Director | OPT+S | $36.15 | 7,500 | $271,125 | 259 |
| 2016-12-14 03:29 | 2016-12-09 | WDC | WESTERN DIGITAL CORP | BHATIA MANISH H | Officer | OPT+S | $67.98 | 23,898 | $1,624,674 | 88,244 |
| 2016-12-14 03:29 | 2016-12-09 | WDC | WESTERN DIGITAL CORP | MEHROTRA SANJAY | Director | OPT+S | $68.08 | 100,000 | $6,807,760 | 4,089 |
| 2016-12-13 03:58 | 2016-12-08 | WDC | WESTERN DIGITAL CORP | DENERO HENRY T | Director | SELL | $69.23 | 3,827 | $264,943 | 13,828 |
| 2016-12-10 01:04 | 2016-12-07 | NTAP | NetApp, Inc. | HELD GERALD | Director | OPT+S | $36.45 | 20,000 | $729,098 | 259 |
| 2016-12-08 02:10 | 2016-12-06 | QTM | QUANTUM CORP /DE/ | Starboard Value LP | 10% owner | SELL | $0.91 | 7,850,000 | $7,152,920 | 1,500,174 |
| 2016-12-08 02:17 | 2016-12-06 | QTM | QUANTUM CORP /DE/ | Smith Jeffrey C | 10% owner | SELL | $0.91 | 7,850,000 | $7,152,920 | 1,500,174 |
| 2016-12-08 03:20 | 2016-12-05 | WDC | WESTERN DIGITAL CORP | CORDANO MICHAEL D | Officer | OPT+S | $66.91 | 7,753 | $518,738 | 54,014 |
| 2016-12-06 03:00 | 2016-12-01 | QTM | QUANTUM CORP /DE/ | Starboard Value LP | 10% owner | SELL | $0.92 | 3,600,000 | $3,312,360 | 3,066,390 |
| 2016-12-06 03:04 | 2016-12-01 | QTM | QUANTUM CORP /DE/ | Smith Jeffrey C | 10% owner | SELL | $0.92 | 3,600,000 | $3,312,360 | 3,066,390 |
| 2016-12-06 04:14 | 2016-12-01 | WDC | WESTERN DIGITAL CORP | CORDANO MICHAEL D | Officer | OPT+S | $65.00 | 5,896 | $383,240 | 55,871 |
| 2016-12-06 04:10 | 2016-12-01 | WDC | WESTERN DIGITAL CORP | MILLIGAN STEPHEN D | Director, Officer | SELL | $65.00 | 67 | $4,355 | 105,441 |
| 2016-12-03 01:20 | 2016-11-30 | NTAP | NetApp, Inc. | Kurian George | Director, Officer | SELL | $36.56 | 4,000 | $146,240 | 40,396 |
| 2016-11-30 04:59 | 2016-11-28 | WDC | WESTERN DIGITAL CORP | RAY MICHAEL CHARLES | Officer | OPT+S | $63.11 | 5,589 | $352,722 | 41,405 |
| 2016-11-23 00:21 | 2016-11-18 | STX | Seagate Technology Holdings plc | RE MARK | Officer | SELL | $38.97 | 11,000 | $428,677 | 50,077 |
| 2016-11-23 00:17 | 2016-11-18 | NTAP | NetApp, Inc. | REICH JOEL D | Officer | SELL | $37.05 | 1,403 | $51,984 | 0 |
| 2016-11-19 01:53 | 2016-11-16 | STX | Seagate Technology Holdings plc | MacPherson Regan J | Officer | SELL | $38.40 | 3,091 | $118,700 | 16,702 |
| 2016-11-16 02:27 | 2016-11-14 | WDC | WESTERN DIGITAL CORP | RAY MICHAEL CHARLES | Officer | SELL | $60.00 | 1,000 | $60,000 | 41,405 |
| 2016-11-11 02:38 | 2016-11-08 | WDC | WESTERN DIGITAL CORP | DENERO HENRY T | Director | SELL | $57.43 | 1,750 | $100,499 | 17,655 |
| 2016-11-09 04:51 | 2016-11-07 | WDC | WESTERN DIGITAL CORP | MASSENGILL MATTHEW E | Director | SELL | $57.32 | 2,187 | $125,348 | 14,879 |
| 2016-11-09 04:51 | 2016-11-07 | WDC | WESTERN DIGITAL CORP | CORDANO MICHAEL D | Officer | SELL | $56.41 | 889 | $50,148 | 55,772 |
| 2016-10-05 04:17 | 2016-10-03 | WDC | WESTERN DIGITAL CORP | RAY MICHAEL CHARLES | Officer | SELL | $60.00 | 6,183 | $370,980 | 42,941 |
| 2016-10-05 04:17 | 2016-10-03 | WDC | WESTERN DIGITAL CORP | CORDANO MICHAEL D | Officer | SELL | $59.15 | 18,250 | $1,079,495 | 57,553 |
| 2016-10-04 00:20 | 2016-09-30 | NTAP | NetApp, Inc. | Kurian George | Director, Officer | SELL | $35.16 | 4,000 | $140,640 | 40,570 |
| 2016-09-30 02:02 | 2016-09-27 | WDC | WESTERN DIGITAL CORP | RAY MICHAEL CHARLES | Officer | OPT+S | $58.63 | 2,719 | $159,415 | 49,124 |
| 2016-09-29 23:18 | 2016-09-27 | NTAP | NetApp, Inc. | WALL ROBERT T | Director | SELL | $35.45 | 22,944 | $813,413 | 36,048 |
| 2016-09-24 01:48 | 2016-09-21 | PSTG | Everpure, Inc. | Riitters Timothy | Officer | SELL | $13.50 | 3,231 | $43,619 | 31,769 |
| 2016-09-23 02:34 | 2016-09-21 | WDC | WESTERN DIGITAL CORP | CORDANO MICHAEL D | Officer | OPT+S | $54.50 | 7,185 | $391,583 | 75,803 |
| 2016-09-16 23:15 | 2016-09-14 | STX | Seagate Technology Holdings plc | MORTON DAVID H JR | Officer | SELL | $36.16 | 1,716 | $62,054 | 20,782 |
| 2016-09-14 01:59 | 2016-09-13 | STX | Seagate Technology Holdings plc | MORTON DAVID H JR | Officer | SELL | $35.98 | 2,773 | $99,766 | 22,498 |
| 2016-09-01 23:42 | 2016-08-31 | STX | Seagate Technology Holdings plc | RE MARK | Officer | SELL | $33.58 | 5,800 | $194,787 | 46,970 |
| 2016-08-26 23:53 | 2016-08-24 | STX | Seagate Technology Holdings plc | RE MARK | Officer | OPT+S | $31.84 | 12,750 | $406,006 | 52,770 |
| 2016-08-27 00:45 | 2016-08-26 | NTAP | NetApp, Inc. | Kurian George | Director, Officer | OPT+S | $34.87 | 48,176 | $1,679,940 | 44,570 |
| 2016-08-27 00:45 | 2016-08-25 | NTAP | NetApp, Inc. | SHAHEEN GEORGE T | Director | OPT+S | $35.01 | 30,000 | $1,050,387 | 0 |
| 2016-08-25 01:24 | 2016-08-22 | NTAP | NetApp, Inc. | ALLEN JEFFRY R | Director | OPT+S | $35.08 | 40,000 | $1,403,320 | 0 |
| 2016-08-24 00:08 | 2016-08-19 | NTAP | NetApp, Inc. | REICH JOEL D | Officer | SELL | $33.96 | 489 | $16,609 | 0 |
| 2016-08-10 00:12 | 2016-08-09 | STX | Seagate Technology Holdings plc | RE MARK | Officer | SELL | $32.50 | 3,082 | $100,174 | 56,623 |
| 2016-08-09 23:16 | 2016-08-09 | STX | Seagate Technology Holdings plc | BIONDI FRANK | Director | OPT+S | $32.45 | 1,251 | $40,600 | 5,182 |
| 2016-07-01 23:20 | 2016-06-30 | NTAP | NetApp, Inc. | REICH JOEL D | Officer | SELL | $24.35 | 2,241 | $54,573 | 489 |
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.