Here are some of the most active stocks seeing insider buying and spikes in volume.

Insider Buying: Impinj (PI)

Imping (PI), a manufacturer of radio-frequency identification devices and software, just saw 10% stock owner Sylebra Capital picked up $20 million worth of the stock.

Helping, earnings haven’t been too shabby.

In fact, in its most recent report, the company’s EPS of 83 cents beat by nine cents. Revenue of $102.5 million, up 19.2% year over year, beat by nearly $5 million. 

“Our second-quarter results were strong, setting several new records,” said Chris Diorio, Impinj co-founder and CEO. “Revenue topped $100 million and adjusted EBITDA topped $25 million, both well above our guidance. Free cash flow topped $40 million. As we continue driving our bold vision to connect every item in our everyday world, I remain confident in our market position and energized by the opportunities ahead.”

Volume Spike: Compass Minerals (CMP)

Compass Minerals saw volume spike to two million, as compared to its daily average volume of 80,524. All after the company provide preliminary third quarter earnings numbers. At the moment, it expects to see revenue of $202.9 million as compared to estimates for $197.81 million. It also expects to see a net loss of $1.01, as compared to estimates for -65 cents.