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:

Meanwhile, hedge funds are making moves in biotech:

• RA Capital Management disclosed a $50 million purchase in 89bio $ETNB. This is a fund known for backing early-stage biotech names before big breakouts. Their track record includes early stakes in Moderna in 2015.
• Paradigm Biocapital Advisors just filed a 13G for Edgewise Therapeutics $EWTX, reporting a 5.00% stake.

Another insider transaction to hit the tape was from Platinum Equity LLC.

A Form 4 filing reveals a $32.5 million purchase...

Director Elizabeth Davis just put nearly $200,000 on the line for 10,725 shares of Comstock Resources $CRK, a bold bet on the energy space.

Here’s The Hot Corner, with data from January 31, 2025:

Meanwhile, over in the financial sector, Timothy Hunter of Northwest Bancshares $NWBI scooped up 10,000 shares, signaling confidence in the regional banking sector.

Today's standout insider activity comes from Citadel Advisors, which filed an initial 13G revealing a 5.10% stake in Arvinas $ARVN.

When firms like Citadel and high-level executives put skin in the game, it pays to take notice.

Meanwhile, in a Form 4 filing, Adobe Inc $ADBE director David Ricks disclosed a purchase of 2,250 shares, a clear sign of confidence from the inside.

Here’s The Hot Corner, with data from January 30, 2025:

Pzena Investment Management filed an initial 13G for Advance Auto Parts $AAP revealing a stake of 5.50%.

Last but not least, former Visa CEO Alfred Kelly Jr, who joined General Motors’ $GM board of directors in September, bought 12,000 shares of GM.

Today's standout insider transaction comes from Ally Financial $ALLY CEO Michael G. Rhodes, who just made a bold move, buying 25,634 shares worth roughly $1 million.

When a CEO puts their own money on the line, it's always worth paying attention.

Here’s The Hot Corner, with data from January 29, 2025:

Last but not least, John C. Malone is back at it, adding to his stake in The Liberty Braves Group $BATRA with a fresh $935,450 buy.

Today’s standout insider transaction comes from Robert W. Stallings, director of Texas Capital Bancshares $TCBI.

Stallings just made a bold move, scooping up 7,676 TCBI shares for a total of $146,705.

Here’s The Hot Corner, with data from January 28, 2025:

Meanwhile, institutions are making waves too.

Victory Capital Management just increased its stake in Genpact Limited $G, filing a 13G that reveals a bump from 4.72% to 5.19%.

Today’s standout insider transaction comes from Russ Hutchinson, chief financial officer of Ally Financial Inc $ALLY.

Hutchinson made a significant purchase of 19,100 ALLY shares, totaling $753,473.

Here’s The Hot Corner, with data from January 27, 2025:

CFOs are often the secret sauce of insider trading.

They have unparalleled insight into the company’s financial health and future prospects—they know the numbers better than anyone else.

When a CFO puts their own money on the line, it can signal strong confidence in the stock.

First up, Control Empresarial de Capitales S.A., the Mexican investment firm known for its deep pockets and strategic plays, just scooped up 100,000 shares of PBF Energy Inc $PBF.

That’s a $2.9 million bet on the refiner, and it raises eyebrows as energy stocks continue their promising climb into the first weeks of 2025.

Here’s The Hot Corner, with data from January 24, 2025:

Meanwhile, John C. Malone has added to his stake in The Liberty Braves Group $BATRA.

Malone grabbed 33,600 shares, reinforcing his commitment to the company behind the Atlanta Braves franchise. 

Today’s top moves come via two significant 13G filings.

Point72 Asset Management boosted its stake in Syndax Pharmaceuticals $SNDX from 3.25% to 5.00%.

This increase signals growing confidence in the company’s prospects from one of the most high-profile hedge funds in the market.

Here’s The Hot Corner, with data from January 23, 2025:

Dimensional Fund Advisors disclosed an initial 5.30% position in Academy Sports and Outdoors $ASO. 

A 13G is a passive stake filing that reveals when an investor takes a large position (over 5%) in a company.

It’s often a sign they see solid potential in the stock and are placing a bet on its future growth.

Let’s kick off with UnitedHealth Group $UNH, where Director Timothy P. Flynn made waves by purchasing 1,000 shares, a buy worth $511,575. 

That’s a confident signal from inside one of the healthcare giants.

Here’s The Hot Corner, with data from January 22, 2025:

Meanwhile, over at Home BancShares $HOMB, Chairman, CEO, and Co-Founder John W. Allison put his money where his mouth is, snapping up 10,000 shares. 

That’s a bold vote of confidence from the man who built the bank from the ground up.

The stock has carved out a massive base for the last eight years. Price is pressing against the top of the range as buyers work on absorbing all the overhead supply at this resistance zone:

If we get a decisive breakout above 30, the path of least resistance will switch higher.

Today’s standout insider activity comes from Kevin Johnson, a director at Goldman Sachs Group $GS.

Johnson made a bold statement of confidence by purchasing 2,400 GS shares, a total investment of $1.4 million. 

Here’s The Hot Corner, with data from January 21, 2025:

EcoR1 Capital also made a significant move, filing a Form 4 for Zymeworks Inc $ZYME that shows a purchase of $1,963,538.

Finally, Valinor Management filed a 13D for Nextdecade Corp $NEXT, reporting an increase in its ownership stake from 5.28% to 5.70%.

Rep. Nancy Pelosi is back on our list after filing a Periodic Transaction Report detailing transactions in multiple stocks.

The former Speaker of the House reported the following moves:

Nvidia $NVDA:

• Exercised $500K-$1M in call options with $12 strike, expiring 12/20/24.
• Bought $250K-$500K in call options with $80 strike, expiring 1/16/26.

Palo Alto Networks $PANW:

• Purchased $1M-$5M in call options with $100 strike, expiring 12/20/24.

Alphabet Inc $GOOGL:

• Purchased $250K-$500K in call options with $150 strike, expiring 1/16/26.

Amazon.com Inc $AMZN:

• Purchased $250K-$500K in call options with $150 strike, expiring 1/16/26.

Tempus AI Inc $TEM:

• Purchased $50K-$100K in call options with $20 strike, expiring 1/16/26.

Today’s standout insider activity comes from Neogen Corporation $NEOG.

Both the CEO and CFO filed Form 4s, reporting significant purchases of their company’s stock.

When the company’s top executives—the strategic decision-maker (CEO) and the financial steward (CFO)—make simultaneous moves, it’s a signal worth noting.

These leaders have valuable insights into the company’s numbers, projections, and future direction.

Here’s The Hot Corner, with data from January 16, 2025:

Control Empresarial De Capitales SA revealed an additional $2.8 million investment in PBF Energy, increasing its ownership stake to an impressive 25.17%.

Last but not least, Broadwood Partners disclosed the acquisition of 29,376 shares of STAAR Surgical Company $STAA, valued at $630,838.