First up, Apeiron Investment Group just made a massive bet on ATAI Life Sciences $ATAI, picking up more than $22 million in stock.

The stock is up roughly 5% this morning.

Next, Carl Icahn has disclosed a 9.52% stake in JetBlue Airways $JBLU through a 13D filing.

Icahn isn’t just any investor. He’s one of the most legendary activist investors of all time.

Carl Icahn's track record speaks for itself, with high rewards from investments in companies like Apple $AAPL, Netflix $NFLX, and CVR Energy $CVI in the past.

So if history repeats itself, this 13D filing could mark the start of a major turnaround story for JBLU.

Here’s The Hot Corner, with data from February 19, 2025:

Today's insider action starts with a bold move at J.B. Hunt $JBHT, where director James Robo disclosed a purchase of nearly $10 million.

RA Capital Management reported an original 13D showing a 23.7% stake in Sionna Therapeutics $SION. 

The biotech-focused hedge fund has a strong track record in early-stage investments, making this one to watch.

Among its largest holdings are Ascendis Pharma $ASND, Vaxcyte $PCVX, and Janux Therapeutics $JANX.

Here’s The Hot Corner, with data from February 18, 2025:

Today’s most significant insider transaction comes via a 13G filing by SoftBank, which reported a fresh 8% stake in Alibaba $BABA.

This marks a notable shift in SoftBank's strategy after it nearly unloaded its entire BABA position last year.

Given the timing and size of the purchase, we’re treating it as a “new position.” And such fresh bets are always worth noting.

Director John Cote filed a Form 4 revealing a purchase of roughly $10 million in CompoSecure Inc $CMPO.

Here’s The Hot Corner, with data from February 14, 2025:

Point72 Asset Management filed a 13G, reporting an increase in its stake in Tower Semiconductor $TSEM from 2.80% to 5.05%.

This represents a nearly 100% increase in its existing position, which is noteworthy.

Founded by Steve Cohen, the hedge fund is known for aggressive trading and deep research, managing tens of billions in assets.

Here’s The Hot Corner, with data from February 13, 2025:

Executive Vice President and Chief Commercial Officer Phil Guido just dropped $1 million on 4,645 shares of Advanced Micro Devices $AMD.

Guido is the one driving AMD's global commercial strategy. He's got a front-row seat to the company's growth prospects, so if he's buying, that's worth noting.

But what really stands out is the wave of CEO buying across the board.

The heads of Amcor $AMCR, Magnera $MAGN, Enanta Pharma $ENTA, and Kennametal $KMT all stepped in to buy their own stock.

When you see a bunch of CEOs putting their money where their mouth is, you pay attention.

Here’s The Hot Corner, with data from February 12, 2025:

Estee Lauder $EL director Paul Fribourg just doubled down, adding another 45,500 EL shares to his position.

Meanwhile, over at Match Group $MTCH, it’s not just one insider—it’s a coordinated move. Both the CEO and a director dropped $2.15 million on their own stock.

When leadership moves in tandem like this, it’s often a signal that they believe brighter days are ahead for the company.

Here’s The Hot Corner, with data from February 10, 2025:

Estee Lauder $EL director Paul Fribourg just doubled down, adding another 45,500 EL shares to his position.

Meanwhile, over at Match Group $MTCH, it’s not just one insider—it’s a coordinated move. Both the CEO and a director dropped $2.15 million on their own stock.

When leadership moves in tandem like this, it’s often a signal that they believe brighter days are ahead for the company.

Here’s The Hot Corner, with data from February 10, 2025:

The largest insider transaction on today’s list was filed by The Estee Lauder Companies $EL director Paul Fribourg.

Fribourg revealed a purchase of $5,724,373 in his own company’s stock.

The CEO of Markel Corp $MKL just put a little over $200,000 of his own cash into the stock—not a massive bet, but definitely worth paying attention to.

We like to see CEO purchases come with a little more size than this.

Here’s The Hot Corner, with data from February 7, 2025:

We’ve got some notable insider transactions hitting the tape.

JetBlue Airways $JBLU Director Nik Mittal just went all in, snapping up 100,000 shares of JBLU.

After a brutal post-earnings drop on January 28, this insider move signals a strong bet on a turnaround.

With Mittal’s private equity background, he likely sees value the market is missing.

Here’s The Hot Corner, with data from February 6, 2025:

We just got some interesting insider action from a few big names. Let’s break it down.

Control Empresarial de Capitales S.A. just dropped $1,098,968 on a fresh PBF Energy $PBF buy.

This firm, linked to Mexican billionaire Carlos Slim, has stakes in everything from energy to media. When they make a move, it’s worth watching.

Here’s The Hot Corner, with data from February 5, 2025:

Pleasant Lake Partners LLC made a notable move in 1-800-FLOWERS.COM $FLWS. The investment manager acquired 724,700 FLWS shares, a purchase worth approximately $5.7 million.

Meanwhile, Pzena Investment Management increased its stake in Magna International Inc $MGA, filing a 13G that reflects a rise in ownership from 9.15% to 10.00%.

Here’s The Hot Corner, with data from February 4, 2025:

Today's most significant insider transaction comes straight from a Form 4 filing by none other than Warren Buffett.

Uncle Warren just scooped up 2,308,119 shares of Sirius XM Holdings $SIRI—a $54 million bet—pushing Berkshire Hathaway’s stake to 35.35%.

When Buffett adds, it’s worth paying attention.

Here’s The Hot Corner, with data from February 3, 2025: