Note: The transactions reported here refer to legal insider trading — purchases, sales, and other dealings in company securities by executives, directors, and major shareholders, which are required by law to be disclosed to the SEC via Form 4 filings within two business days of the transaction. This article covers the top 100 most significant transactions by dollar value from today's filings. This is entirely distinct from illegal insider trading, which involves buying or selling securities based on material, non-public information in violation of US federal securities law and equivalent legislation in other jurisdictions.
Insider trading activity on September 30, 2026, leaned heavily bearish, with sales outpacing purchases by a significant margin. Out of 100 total trades, only 13 were buys, while 87 were sales, reflecting a notable shift toward profit-taking or reduced exposure among corporate insiders. The largest transactions were concentrated in high-profile names, with several multi-million-dollar sales overshadowing a handful of strategic purchases.
The day’s most substantial insider buys were led by Berkshire Hathaway Inc., which made three separate purchases totaling $39.9 million each in its own Class A (BRK-A) and Class B (BRK-B) shares, as well as in Lennar Corporation (LEN). These transactions were executed by Berkshire Hathaway as a 10% owner, signaling continued confidence in its holdings. Meanwhile, ADARx Pharmaceuticals (ADRX) saw two major buys: SR One Capital Management, a 10% owner, and Director George Simeon each invested $27.2 million, suggesting strong institutional and executive belief in the company’s prospects.
On the sell side, NVIDIA Corporation (NVDA) and Broadcom Inc. (AVGO) dominated the activity. NVIDIA Director Mark A. Stevens sold $300.1 million worth of shares, while Broadcom’s Director Henry Samueli offloaded $250 million in stock. Broadcom also saw a proposed sale of $225 million by affiliate D95GT, LLC. Other notable sales included Hut 8 Corp. (HUT), where Officer and Director Michael Ho proposed to sell $139.1 million in shares, and CrowdStrike Holdings (CRWD), where Officer Burt W. Podbere filed to sell $125.5 million.
The stark imbalance between buys and sales, particularly in tech and semiconductor giants, may indicate cautious sentiment among insiders amid broader market uncertainty. While strategic bets on companies like ADARx and Berkshire’s self-investment stand out, the sheer scale of selling in high-growth sectors could signal profit-taking or repositioning ahead of potential volatility.
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Top 10 Stocks — Insider Activity
Price Charts — Top 3 Stocks
NVDA — NVIDIA Corporation
AVGO — Broadcom Inc.
AVGO — Broadcom Inc.
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