Revolution Medicines $RVMD director Thilo Schroeder is back on our list for the third time in just two weeks with another Form 4 filing.

Following last week’s $3.4 million buy, he revealed an additional $5.5 million purchase in his latest filing.

There’s a handful of large Form 4 purchases on today’s list.

Robert Gervis, director of Aspen Aerogels $ASPN, purchased $4.5 million of stock.

There are a handful of interesting Form 4 filings on today’s list.

One name that stands out is the popular meme stock GameStop $GME.

Today’s Hot List is a short one.

As the market takes a pause following four straight up days, options traders are using puts to fade the bounce in UP Fintech Holdings $TIGR and HP $HPQ.

The highlight of today’s list is the Altimeter Capital Form 4, which revealed a $7 million purchase in the mid-cap software stock Confluent $CFLT.

Altimeter now owns 5,131,700 shares of CFLT.

There was also a significant Form 4 filing by Sequoia Capital’s Roelof Botha, detailing a purchase in the diagnostics and research company Natera $NTRA.

Botha purchased roughly $5 million of NTRA stock, bringing his total share count to over 1.3 million.

We’ve talked a lot about the unusual options activity in commodity stocks like Freeport-McMoRan $FCX in recent weeks and months. 

Yesterday, we saw more of the same, as options traders made some major splashes in April monthly calls for both the oil services giant Schlumberger $SLB and the British integrated oil and gas name Shell Plc $SHEL.

Durable Capital Partners continues to be active, now with an $8.5 million purchase of software company Clearwater Analytics Holdings $CWAN.

In recent weeks, the investment firm has also made filings for purchases in Duolingo $DUOL and Warby Parker $WRBY.

Executives and corporate insiders have been busy to start the week as we have another long list of Form 4 filings today.

Among them is another large purchase by Nelson Peltz’s Trian Fund in the British asset management firm Janus Henderson Group $JHG.

Abdiel Capital filed a Form 4 yesterday revealing a purchase of an additional 105,500 shares in the software company Appian Corp $APPN.

The firm also made a large purchase in February in the amount of roughly $6.5 million. It now owns nearly 6 million shares of APPN, representing an ownership stake of approximately 14%.

Another software stock, Shift4 Payments $FOUR, had insider activity reported, as the chairman of the board and CEO, Jared Isaacman, filed a Form 4 revealing a purchase worth approximately $1.7 million. 

Isaacman now owns 334,742 shares of FOUR.

In today’s action, there was a large inside purchase reported by Sequoia Capital in the food delivery company DoorDash $DASH.

Sequoia has been a long-time investor in the stock.

In other insider purchases, Durable Capital Partners reported a buy worth roughly $5 million in Duolingo $DUOL.

And an Ambarella $AMBA director disclosed a purchase of just over $1 million in his company’s stock.

Warren Buffett’s Berkshire Hathaway $BRK.A also disclosed more buying in Occidental Petroleum $OXY.

We continue to see insider buying in a lot of the same names.

And the Baker brothers are making an appearance on The Hot List, as we suggested during our recent webinar. 

We have a couple of billionaire sightings toward the top of today’s Hot List.

And we also have some congressional activity in the energy space to report.