Buffett's Berkshire Reports a $54 Million SIRI Buy

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 in Custom Truck One Source, Inc $CTOS, a significant vote of confidence in the rental and leasing services provider.