Why insider trading matters?

When insiders buy shares on the open market, this can thus be regarded as a strong endorsement by those that know the company the best -- they are literally betting their own money on the company's future. Insider selling, however, is not necessarily meaningful in any way, as there is a range of reasons for insiders to liquidate (some) of the shares they own.

- Seeking Alpha
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
2021-05-27 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
2019-08-21 Rousseau Raphael See Remarks Sell 10,000 $10.76 $107,631 Yes

Insider Smart

Planet Fitness, Inc (PLNT) - Our position in PLNT is also inspired by insider trading, if insiders are comfortable and confident buying around $50, it is an easy hold if you can pick it up at an even lower price. Our avg cost of the position is ~$40 and is now with 50% profit.

Insider Smart

PENN NATIONAL GAMING INC (PENN) - PENN took a deep dive from $36 to $5 due to the crash, anyone who was bold enough to pick up some shares in March or April could have made a 900% profit in 2 months. But bottom fishing is always easier said than done, if one took a safer bet and followed multiple insider buying around $18, a 100% profit is still impressive.