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AMIX · NASDAQ · Medical - Devices

Autonomix Medical (AMIX)

Develops transvascular catheters to sense, target, and ablate peripheral nerves.

$4.20
After hours+0.04 (+0.96%)
At close$4.16(+2.72%)

13F · 13D/G · Form 4

Institutions3.14%17.0K shares
15 holders · as of Mar 31, 2026
Insiders13.88%75.4K shares
4 holders · as of Sep 21, 2026
Other82.98%450.6K shares
remainder

543.0K company shares as of Aug 22, 2026 · institutions as of Mar 31, 2026 · holders as of their latest filing

Two share counts disagree (971.0K in the company's Sep 22, 2026 report, 543.0K elsewhere); stakes use the report.

13F · 13D/G · Form 4

HolderStakeSharesDate
Bradley HauserInsiderofficer: CEO and President
4.97%27,000filed Sep 8, 2026
Walter V. KlempInsiderdirector
3.70%20,118filed Sep 8, 2026
Trent N. SmithInsiderofficer: CFO
2.78%15,119filed Sep 21, 2026
Lori BissonInsiderdirector
2.42%13,119filed Sep 8, 2026
Geode Capital Management, LLCInstitution
1.54%175,621as of Mar 31, 2026
Mariner, LLCInstitution
0.46%52,910as of Mar 31, 2026
UBS Group AGInstitution
0.29%33,497as of Mar 31, 2026
LPL Financial LLCInstitution
0.28%31,435as of Mar 31, 2026
Bank of Montreal /Can/Institution
0.22%25,000as of Mar 31, 2026
Ikarian Capital, LLCInstitution
0.16%18,688as of Mar 31, 2026
Virtu Financial LLCInstitution
0.11%12,884as of Mar 31, 2026
Tower Research Capital LLC (TRC)Institution
0.05%5,841as of Mar 31, 2026
PNC Financial Services Group, Inc.Institution
0.01%1,588as of Mar 31, 2026
Investors Research CorpInstitution
0.00%200as of Mar 31, 2026
Farther Finance Advisors, LLCInstitution
0.00%10as of Mar 31, 2026
Harbour Investments, Inc.Institution
0.00%10as of Mar 31, 2026
Key Capital Management, IncInstitution
0.00%10as of Mar 31, 2026
Swan Capital LLCInstitution
0.00%10as of Mar 31, 2026
National Bank of Canada /FI/Institution
0.00%7as of Mar 31, 2026
Landy TothInsider
10.80% of class, as filedfiled Feb 26, 2024
BioStar Ventures III, L.P.1,2Strategic10 percent owner
21.19%115,062filed Feb 1, 2024
Jonathan P. Foster3Insiderdirector
6.36%34,524filed Jan 26, 2024
David Andrew Robins3Insiderdirector
4.49%24,397filed Jan 26, 2024
  1. Last filed Feb 1, 2024; leaving the company requires no filing. Not in the bar.
  2. Reported at 4.30% on Aug 14, 2025, under the 5% line, so no further filing is required.
  3. Last filed Jan 26, 2024; leaving the company requires no filing. Not in the bar.

13F, as of Mar 31, 2026

15 holders · 357.7K shares · 2 new positions · 4 increased · 3 reduced · 4 closed

HolderShares% outstandingChg q/qFiled
Geode Capital Management, LLC175.6K32.34%+152.1KMay 15, 2026
Mariner, LLC52.9K9.74%−233May 13, 2026
UBS Group AG33.5K6.17%+33.4KMay 5, 2026
LPL Financial LLC31.4K5.79%0May 6, 2026
Bank of Montreal /Can/25.0K4.60%0May 13, 2026
Ikarian Capital, LLC18.7K3.44%0May 15, 2026
Virtu Financial LLC12.9K2.37%+12.9KnewMay 14, 2026
Tower Research Capital LLC (TRC)5.8K1.08%−8May 15, 2026

13D/G · 5% or more, as filed

Holder% of classSharesFormFiled
BioStar Ventures III, L.P.10.50%13GOct 7, 2024
C/M Capital Master Fund, LPincl. Mercer Street Global Opportunity Fund, LLC, Mercer Street Capital Partners, LLC +4 more9.99%13GDec 3, 2024

Form 4

Latest trades

No open-market trades in the last 12 months.

House and Senate disclosures

Not reported.