— Why it moved
Why AMIX Stock More Than Doubled Today — July 29, 2026
A routine warrant filing put $5.1M of cash next to a company the market valued under $3M, and the premarket did the rest.
What moved AMIX stock
Autonomix Medical is a pre-revenue device company building a catheter that reads and ablates nerve signals, aimed first at pancreatic cancer pain. The spark was a filing registering 857,462 shares for resale against Series D warrants struck at $5.75. The number that actually mattered was sitting in the same disclosure: roughly $5.1 million of cash behind 971,043 shares outstanding. The stock had closed at $2.75.
The mechanics
Run that arithmetic and the entire company was priced at about half its bank balance, with only ~526,000 shares of real float to trade against. There is no supply here to absorb interest. Nearly 70 million shares changed hands on Wednesday against a share count under a million, which is the whole explanation for the shape of the chart.
AMIX by the numbers
The alert window
Stock Pulse alerted at 7:21 AM in the premarket at $4.92. The peak, $7.25, printed at 9:43 AM, two hours and twenty-two minutes later. That window was real but it was not comfortable: the stock drifted down through the rest of the premarket and traded as low as $4.21 at the opening bell, 14% under the alert, before the bid showed up. You had to still be holding at 9:31 to get paid at 9:43.
How AMIX's move ended
It closed at $4.57, 7% below the alert. Of the 515 minutes between the alert and the bell, 128 closed above $4.92, the last of them at 1:14 PM, and the low of the afternoon was $3.93. What frames the whole thing: those Series D warrants are dilution waiting at $5.75, there was already an offering inside the last 60 days, and a pre-revenue device company's cash pile shrinks every quarter by design.
The tell: when a nano-cap's cash exceeds its market cap, the re-rate is violent and still round-trips. The number to plan around is the exit, not the story.