Buffett's Berkshire Reports a $106.5 Million $SIRI Buy

Every day, we sift through the filings to spot where the real conviction lies – cutting through the noise to highlight the most meaningful insider moves.

Here's what stood out today:

📌 Sirius XM Holdings $SIRI – Warren Buffett’s Berkshire Hathaway just stepped in with a massive $106.5 million open-market buy.

One of the biggest insider buys we've seen all year. Buffett-sized bets speak louder than words..

📌 Clean Harbors $CLH – Co-CEO Michael Louis Battles dropped $467,000 into shares.

Another clean industrial name with a meaningful C-suite purchase. Certainly one to watch as it attempts to claw back to its former highs.

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

Click the table to enlarge it.

📌 Celcuity Inc $CELC – Baker Bros. Advisors raised its activist stake from 11.47% to 18.90% in a 13D filing.

Perceptive Advisors also lifted its stake from 4.00% to 6.55% in a 13G filing.

Two specialist biotech funds both lean hard into the same small-cap name. Huge tell.

📌 Rocket Companies $RKT – VA Partners I, LLC increased its 13D stake again, now up to 9.90% from 8.90%.

Steady accumulation continues in mortgage finance.