SNSE Sensei Biotherapeutics, Inc. Insider Trading

Millennium Management sells 17,076 shares for $538,114.34 while buying 4,215 shares for $141,364.00 at SNSE; net reduction of 12,861 shares.

Millennium Management, a 10% owner, executed 12 separate sales totaling 17,076 shares for $538,114.34 across April 2–7, 2026, while simultaneously making 5 purchases totaling 4,215 shares for $141,364.00. The net effect is a reduction of 12,861 shares, bringing holdings from 146,847 to 133,986 shares. Transaction prices ranged from $28.94 to $35.55, whereas the current stock price of $20.43 sits 44.4% below the 52-week high of $36.76, suggesting the insider sold into strength during early April. The company reports negative net income and a $27.4M market cap, indicating a loss-making biotech in a challenged position. The scale of net selling by a major shareholder warrants attention given the stock's recent 30-day decline of 30.1%.

Millennium Management LLC (10% owner) purchased 12.2K shares of SNSE across 10 transactions for $382.1K while selling 2.7K shares for $76.9K on Mar 31–Apr 1.

Millennium Management LLC executed a net purchase of 9,439 shares, increasing its stake from 138,292 to 147,731 shares across 10 buy transactions totaling 12.2K shares for $382.1K and 7 sale transactions totaling 2.7K shares for $76.9K between March 31 and April 1. The purchases occurred at prices ranging from $24.69 to $35.46, while the company trades at $20.43 (down 44.4% from its 52-week high of $36.76 and down 30.1% over 30 days). The filer is accumulating shares despite SNSE's negative net income of $-170.2M and market cap of $27.4M, alongside sharp recent price declines. The mixed buy-and-sell pattern across multiple price points suggests opportunistic execution rather than a simple conviction-driven accumulation, but the net effect is a material increase in a 10% holder's position in an unprofitable, volatile biotech stock.

Millennium Mgmt (10% Owner) makes 11 purchases & 6 sales at SNSE over 3 days, net buying 27,335 shares; post-trade holding: 145.7K shares

Millennium Management LLC filed a Form 4 at Sensei Biotherapeutics, Inc. (SNSE) covering 17 separate transactions across three trading days (2026-03-26 through 2026-03-30), comprising 11 purchases totaling 30,585 shares for $818,257.09 and 6 sales totaling 3,250 shares for $89,389.75, resulting in a net increase of 27,335 shares. The post-transaction holding of 145,678 shares represents a meaningful expansion from the pre-transaction level of 118,343 shares, as Millennium's position in SNSE has grown substantially. This activity occurs against a backdrop of notable price volatility: the current price of $20.43 sits -44.4% from the 52-week high of $36.76, while the 30-day change is -30.1%, meaning the transaction prices across all 17 legs were executed at levels well above the current market price. The company carries a net income of $-170,236,000.00 and a market cap of just $27,415,854.63, making Millennium's expanded stake particularly notable relative to the company's overall size.