Tenax Therapeutics Inc
Ownership
Ownership Structure
Who owns Tenax Therapeutics Inc (TENX)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 83.4% of the shares are freely tradable; institutional investors hold 63.4%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| FMR Inc | 8.66 | 3,942,373 | +1,122.1 | 06/30/2026 |
| Vivo Capital, LLC | 5.49 | 2,500,000 | +1,100.0 | 06/30/2026 |
| BlackRock Inc | 3.79 | 1,727,988 | +10,078.4 | 06/30/2026 |
| Perceptive Advisors LLC | 3.73 | 1,700,000 | +17.4 | 06/30/2026 |
| Vanguard Capital Management, LLC | 2.52 | 1,147,121 | +335.5 | 06/30/2026 |
| Millennium Management LLC | 1.92 | 876,230 | +64.1 | 06/30/2026 |
| Ikarian Capital, LLC | 1.73 | 787,600 | -22.6 | 06/30/2026 |
| Candriam Luxembourg S.C.A. | 1.65 | 749,588 | +0.0 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Russell 2000 ETF | 1.97 | 898,558 | +0.0 | 10/30/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 1.87 | 852,259 | +0.0 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| ADAR1 Capital Management, LLC | 10% Owner | 7,447,000 | 11,915,200 $ | Oct 21, 2026 | indirect |
| Doogan Declan | Director | 55,274 | 88,438 $ | Sep 16, 2026 | direct |
| Giordano Christopher Thomas | CEO | 22,174 | 35,478 $ | Sep 15, 2026 | direct |
| Staab Thomas R Ii | Chief Financial Officer | 15,675 | 25,080 $ | Sep 11, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 21, 2026 | ADAR1 Capital Management, LLC | 10% Owner | Buy | 331,979 | 1.66 | 550,687 |
| Oct 20, 2026 | ADAR1 Capital Management, LLC | 10% Owner | Buy | 254,342 | 1.60 | 405,726 |
| Oct 19, 2026 | ADAR1 Capital Management, LLC | 10% Owner | Buy | 336,528 | 1.51 | 507,013 |
| Sep 16, 2026 | Doogan Declan | Director | Buy | 53,000 | 1.92 | 101,760 |
| Sep 15, 2026 | Giordano Christopher Thomas | CEO | Buy | 4,850 | 1.82 | 8,837 |
| Sep 11, 2026 | Giordano Christopher Thomas | CEO | Buy | 6,000 | 1.88 | 11,250 |
| Sep 11, 2026 | Staab Thomas R Ii | Chief Financial Officer | Buy | 5,675 | 1.94 | 10,981 |
| Sep 3, 2026 | ADAR1 Capital Management, LLC | 10% Owner | Buy | 900,000 | 1.78 | 1,604,160 |
| Sep 2, 2026 | ADAR1 Capital Management, LLC | 10% Owner | Buy | 187,704 | 1.80 | 337,586 |
| Sep 1, 2026 | ADAR1 Capital Management, LLC | 10% Owner | Buy | 179,058 | 1.80 | 321,570 |
| Aug 31, 2026 | ADAR1 Capital Management, LLC | 10% Owner | Buy | 403,571 | 1.79 | 722,594 |
| Aug 24, 2026 | ADAR1 Capital Management, LLC | 10% Owner | Buy | 107,374 | 1.75 | 188,355 |
| Aug 21, 2026 | ADAR1 Capital Management, LLC | 10% Owner | Buy | 716,369 | 1.77 | 1,266,254 |
| Aug 20, 2026 | ADAR1 Capital Management, LLC | 10% Owner | Buy | 202,124 | 1.78 | 359,538 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: November 13, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.