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
Gritstone Oncology, Inc. (GRTS)
Sector: Healthcare; Industry: Biotechnology

Gritstone Oncology, Inc., an immuno-oncology company, engages in developing tumor-specific cancer immunotherapies to fight various cancer types.


Trade Date Insider Title Buy/Sell #Shares Price Value Option
2021-12-01 Jones Erin Chief Operating Officer Sell 1,000 $13.01 $13,010 Yes
2021-11-01 Jones Erin Chief Operating Officer Sell 1,000 $11.14 $11,140 Yes
2021-10-04 Jones Erin nan Sell 2,000 $10.70 $21,390 Yes
2021-09-08 Jones Erin nan Sell 2,000 $11.37 $22,748 Yes
2021-11-01 Jones Erin nan Sell 1,000 $11.14 $11,140 Yes
2021-10-04 Jones Erin nan Sell 2,000 $10.70 $21,390 Yes
2021-05-27 Rousseau Raphael nan Sell 2,900 $9.00 $26,112 Yes
2021-01-20 Rousseau Raphael nan Sell 30,000 $20.04 $601,269 Yes
2021-01-19 Yelensky Roman nan Sell 10,000 $22.10 $221,029 No
2020-12-30 Woiwode Thomas Director Buy 1,347,709 $3.71 $5,000,000 No
2019-08-21 Rousseau Raphael See Remarks Sell 10,000 $10.76 $107,631 Yes
2018-09-28 Simon Nicholas 10%-Owner, Director Buy 333,333 $15.00 $4,999,995 Yes
2018-09-28 Clarus Lifesciences III, L.P. 10%-Owner Buy 333,333 $15.00 $4,999,995 Yes

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.

Insider Smart

Carvana Co (CVNA) - One of the best timed insider buying in the crash is from GARCIA ERNEST C. II 10%-owner of CVNA. Bought at 45 and now with a 100%+ profit.