Abdiel Capital Management LLC reported a $2.6 million purchase in the cloud computing and enterprise software stock Appian Corporation $APPN.

The firm now owns more than 5.9 million shares, representing a 15% ownership interest.

It didn’t even last a week!

The Elon and Twitter $TWTR team-up is over before it ever got started.

In a tweet last night, Twitter CEO Parag Agrawal announced that Elon had rejected the company’s offer to join the board.

The two will not be working together for now, at least not in a friendly way.

The largest insider transaction on today's list is a Form 4 filing by Durable Capital Partners LP.

After disclosing a purchase of roughly $25 million in Duolingo Inc $DUOL, the firm now owns 9% of the language-learning platform.

It’s been a wild few weeks of insider activity.

Today, we have another big splash, brought to us by Warren Buffett’s Berkshire Hathaway $BRK.A.

The investment conglomerate filed both a Form 3 and a Form 4 last night, revealing a brand new position worth roughly $4.2 billion in HP Inc $HPQ.

Before we dive into today’s note, we have an update on the Elon-versus-Twitter saga that’s been unfolding all week.

On Tuesday evening, Musk finally filed the appropriate Form 13D we were waiting for, reflecting his intentions as an “active” shareholder.

We had a feeling this one would be fun to watch unfold...

After just 24 hours of speculation and buzz about Elon Musk becoming the largest shareholder of Twitter, we already have some important follow-up news.

In an 8-K filed around 8:30 a.m. ET today, Twitter reported that Musk has been appointed to a board seat.

The only significant information in the filing is that Musk is restricted from becoming a beneficial owner of more than 14.9% of outstanding shares during the time he serves as a director (and 90 days thereafter).

Whether he already owns the 14.9% now or not is unknown. We should find out soon in a 13D and/or a Form 4 filing in the coming days.

Stay tuned. There’s going to be more to come on this one.

The big news of the day is centered around an SEC filing by the wealthiest man in the world.

This morning, Elon Musk disclosed a 9.2% ownership stake in Twitter $TWTR in a 13G filing. Musk has amassed roughly 73.5 million shares for a value of almost $3 billion.

According to the filing, Musk has been buying since the middle of March.

We begin today’s discussion with a special situation that took shape this week.

At the end of the day, what we’re trying to do here is create a universe of stocks that are experiencing bullish activity from investors who have better information than the rest of us.

Typically, this information comes to us in the form of SEC filings, options flow, or through congressional reporting. But that’s not always the case!

Something we’ve discussed a lot is the bullish information we receive when there is a multitude of buying by separate insiders in the same name.

Revolution Medicines $RVMD director Thilo Schroeder continues to appear on our list with another Form 4 filing.

He’s reported four separate purchases over the trailing month for a combined total of over $10 million.

The largest insider buy on today's list is a Form 4 filing by William Clay Ford Jr., the executive chair of Ford Motor $F, who reported a purchase of roughly $4.5 million.

Coliseum Capital Partners continues to build its position in GMS Inc $GMS, as it just filed its second Form 4 in the last week.

Turtle Creek Asset Management continues to build its position in the door and window manufacturer JELD-WEN Holding $JELD. 

Friday’s Form 4 filing is its fourth filing in just two weeks and reveals an additional $16.5 million of share purchases.