Why insider trading matters?

Numerous studies have examined whether there is evidence that U.S. insiders systematically trade on private information despite the legal deterrence. The consensus appears to be that insider purchases (but not sales) tend to be followed by positive abnormal stock price performance, particularly for small growth stocks.

- Prof. B. Espen Eckbo, Dartmouth College
Seagate Technology plc (STX)
Sector: Technology; Industry: Computer Hardware

Seagate Technology plc provides data storage technology and solutions in Singapore, the United States, the Netherlands, and internationally. The company manufactures and distributes hard disk drives; solid state drives (SSDs), including serial attached small computer system interface and non-volatile memory express SSDs; solid state hybrid drives; and storage subsystems. In addition, the company offers external storage solutions under the Seagate Backup Plus and Expansion product lines, as well as under the LaCie and Maxtor brands in capacities up to 168TB. It sells its products primarily to OEMs, distributors, and retailers.


Trade Date Insider Title Buy/Sell #Shares Price Value Option
2021-03-12 LUCZO STEPHEN J Director Sell 244,384 $76.67 $18,737,428 Yes
2021-03-12 Teh Ban Seng EVP, Global Sales Sell 20,357 $76.72 $1,561,832 Yes
2021-03-11 Tilenius Stephanie Director Sell 7,000 $77.38 $541,664 No
2021-03-08 LUCZO STEPHEN J Director Sell 127,600 $74.47 $9,502,512 Yes
2021-03-05 SCHUELKE KATHERINE SVP, CLO & Corporate Secretary Sell 4,525 $73.20 $331,230 No
2021-03-04 LUCZO STEPHEN J Director Sell 75,000 $71.95 $5,396,198 No
2021-03-03 ValueAct Holdings, L.P. Director Sell 4,650,000 $72.75 $338,287,500 No
2021-02-26 Geldmacher Jay L Director Sell 7,500 $74.55 $559,125 No
2021-02-18 Teh Ban Seng EVP, Global Sales Sell 10,000 $72.78 $727,800 Yes
2021-02-16 Fochtman Jeffrey D. SVP, Business & Marketing Sell 5,000 $71.61 $358,050 No
2020-12-16 Nygaard Jeffrey D. Executive Vice President Sell 10,000 $66.00 $660,000 Yes
2021-01-27 Nygaard Jeffrey D. Executive Vice President Sell 38,689 $68.76 $2,660,090 Yes
2021-01-15 ValueAct Holdings, L.P. 10%-Owner, Director Sell 703,034 $60.24 $42,352,270 No
2021-01-08 ValueAct Holdings, L.P. 10%-Owner, Director Sell 617,691 $60.25 $37,214,057 No
2021-01-06 ValueAct Holdings, L.P. 10%-Owner, Director Sell 1,164,725 $60.47 $70,433,076 No
2020-12-31 ValueAct Holdings, L.P. 10%-Owner, Director Sell 1,414,550 $61.20 $86,565,660 No
2020-12-23 Nygaard Jeffrey D. Executive Vice President Sell 17,742 $63.46 $1,125,824 No
2020-12-07 Fochtman Jeffrey D. SVP, Business & Marketing Sell 4,695 $63.42 $297,771 Yes
2020-12-04 Nygaard Jeffrey D. Executive Vice President Sell 37,152 $62.92 $2,337,730 Yes
2020-12-03 LUCZO STEPHEN J Director Sell 20,000 $62.55 $1,250,956 No
2020-12-01 Nygaard Jeffrey D. Executive Vice President Sell 15,000 $59.83 $897,500 Yes
2020-11-24 Nygaard Jeffrey D. Executive Vice President Sell 5,000 $58.00 $290,000 Yes
2020-11-23 Nygaard Jeffrey D. Executive Vice President Sell 4,145 $56.50 $234,192 Yes
2020-10-20 LUCZO STEPHEN J Director Sell 7,000 $52.49 $367,430 No
2020-10-08 LUCZO STEPHEN J Director Sell 56,000 $51.00 $2,856,157 No
2020-09-03 ZANDER EDWARD J Director Sell 16,698 $47.74 $797,099 No
2020-07-23 Teh Ban Seng SVP, Sales Sell 498 $50.00 $24,900 Yes
2020-06-16 LUCZO STEPHEN J Director Sell 7,000 $52.35 $366,456 No
2020-06-12 Teh Ban Seng SVP, Sales Sell 498 $52.80 $26,294 Yes
2020-06-02 LUCZO STEPHEN J Director Sell 7,000 $51.74 $362,206 No

Insider Smart

Altimmune, Inc. (ALT) - Venrock Healthcare Capital Partners III, L.P., 10%-owner of ALT bought 1.3M shares in late May then added another 1.5M shares in June with an averaged ~$8 per share. 10 days after the accumulation, ALT price jumped to $10.

Insider Smart

SIMON PROPERTY GROUP (SPG) - Bottom fishing the crash could be intimidating, but it can be easier if you know insiders are on your side. Aeppel Glyn, Director of SPG played safe and bought shares in May at $50, but it is not late at all, the stock is now $90.