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
908 Devices Inc. (MASS)

Trade Date Insider Title Buy/Sell #Shares Price Value Option
2020-12-22 HRUSOVSKY E KEVIN Director Buy 50,000 $20.00 $1,000,000 Yes
2020-12-22 Turner Michael S. VP, General Counsel Buy 5,000 $20.00 $100,000 No
2020-12-22 Kedar Sharon Director Buy 100,000 $20.00 $2,000,000 Yes
2020-12-22 ARCH Venture Fund VII, L.P. 10%-Owner Buy 300,000 $20.00 $6,000,000 Yes
2020-12-22 Basarsky Trent A. Vice President, Commercial Buy 5,000 $20.00 $100,000 No
2020-12-22 BARTHELEMY NICOLAS Director Buy 14,000 $20.00 $280,000 Yes
2020-12-22 CRANDELL KEITH 10%-Owner, Director Buy 300,000 $20.00 $6,000,000 Yes
2020-12-22 Spoto Mark Director Buy 1,000 $20.00 $20,000 Yes

Insider Smart

Ovintiv Inc (OVV) - Insiders of OVV have been HEAVILY accumulating shares in March with a sub-$3 cost. And the stock is now $11. An awesome 400% gain can't be missed if you found it was heavily accumulated earlier.

Insider Smart

Enphase Energy, Inc (ENPH) - ENPH was $10+ in 15Q1 then dropped to $2 and eventually went under $1. From 15Q4 to 17Q4 it built a 2-year-long base then BOOM! Stock went as high as $70 and likely will make a new high. Catch one or two moves like this you can retire early. One hint before the big move was that CEO and CFO were constantly accumulating, this kind of information is priceless.