STEREOTAXIS INC STXS
COM NEW · Common Stock · CUSIP 85916J409 · ISIN US85916J4094
American medical robotics company
- SectorHealth care
- IndustryElectromedical & Electrotherapeutic Apparatus
- HeadquartersSt.Louis, MO
- Websitestereotaxis.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($4.4k this quarter). Holder counts are more reliable. Shares outstanding: 100.2m as of 2026-07-31, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $1.72. Options: 4 managers hold calls ($80.7k notional), 0 hold puts (—).
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 72 |
| Q4 2022 | 75 |
| Q1 2023 | 69 |
| Q2 2023 | 60 |
| Q3 2023 | 59 |
| Q4 2023 | 62 |
| Q1 2024 | 82 |
| Q2 2024 | 74 |
| Q3 2024 | 85 |
| Q4 2024 | 87 |
| Q1 2025 | 89 |
| Q2 2025 | 88 |
| Q3 2025 | 104 |
| Q4 2025 | 105 |
| Q1 2026 | 115 |
| Q2 2026 | 109 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2024 | 41 | 26 |
| Q4 2024 | 44 | 21 |
| Q1 2025 | 41 | 30 |
| Q2 2025 | 33 | 36 |
| Q3 2025 | 54 | 26 |
| Q4 2025 | 53 | 38 |
| Q1 2026 | 41 | 57 |
| Q2 2026 | 58 | 38 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $170.9k | $98.1k | 0.57 |
| Q4 2025 | $222.6k | $106.7k | 0.48 |
| Q1 2026 | $253.9k | $34.2k | 0.13 |
| Q2 2026 | $80.7k | $0 | 0.00 |
Biggest buyers
| BlackRock, Inc. | Added | +440.6k |
| GEODE CAPITAL MANAGEMENT, LLC | Added | +219.8k |
| MORGAN STANLEY | Added | +201.3k |
| CITADEL ADVISORS LLC | New | +183.1k |
| AQR CAPITAL MANAGEMENT LLC | Added | +131.4k |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Added | +95.0k |
| BANK OF AMERICA CORP /DE/ | Added | +67.6k |
| DEUTSCHE BANK AG\ | Added | +66.5k |
| VANGUARD FIDUCIARY TRUST CO | Added | +59.2k |
| VANGUARD CAPITAL MANAGEMENT LLC | Added | +46.8k |
Biggest sellers
| RENAISSANCE TECHNOLOGIES LLC | Reduced | -357.2k |
| SEI INVESTMENTS CO | Reduced | -284.3k |
| Lagoda Investment Management, L.P. | Reduced | -227.8k |
| CAPTRUST FINANCIAL ADVISORS | Sold out | -221.0k |
| MILLENNIUM MANAGEMENT LLC | Sold out | -68.6k |
| ESSEX INVESTMENT MANAGEMENT CO LLC | Reduced | -68.1k |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | Reduced | -47.7k |
| XTX Topco Ltd | Sold out | -44.6k |
| ENVESTNET ASSET MANAGEMENT INC | Reduced | -44.2k |
| STATE STREET CORP | Reduced | -41.0k |
Biggest calls
| CITADEL ADVISORS LLC | Added | $45.8k26.6k shares |
| IMC-Chicago, LLC | Reduced | $25.8k15.0k shares |
| SIMPLEX TRADING, LLC | Reduced | $6.4k3.7k shares |
| GROUP ONE TRADING LLC | Reduced | $2.8k1.6k shares |
Biggest puts
| None |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| Kaufman Daniel Louis 13G · passive investor new · filed 2026-08-19 | 5.9% |
Fell to 5% or below in the last year: Lagoda Investment Management, L.P. (4.5%, 2026-05-15)
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2024 | 0 | — | 0 | — | — |
| Q1 2025 | 1 | $113.6k | 0 | — | — |
| Q2 2025 | 0 | — | 0 | — | — |
| Q3 2025 | 0 | — | 0 | — | — |
| Q4 2025 | 1 | $66.6k | 0 | — | — |
| Q1 2026 | 0 | — | 0 | — | — |
| Q2 2026 | 0 | — | 0 | — | — |
| Q3 2026 | 0 | — | 0 | — | — |
None reported since 1 Apr 2026.
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| DAFNA Capital Management LLC 4.49% of their portfolio | 13.7m $23.5m | Unchanged |
| BlackRock, Inc. 0.00% of their portfolio | 4.4m $7.6m | Added +440.6k |
| Lagoda Investment Management, L.P. 3.90% of their portfolio | 4.1m $7.1m | Reduced -227.8k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 3.0m $5.2m | Added +46.8k |
| Arbiter Partners Capital Management LLC 1.37% of their portfolio | 2.9m $5.0m | Unchanged |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 1.9m $3.3m | Added +219.8k |
| ESSEX INVESTMENT MANAGEMENT CO LLC 0.34% of their portfolio | 1.5m $2.6m | Reduced -68.1k |
| Archon Capital Management LLC 0.86% of their portfolio | 1.2m $2.1m | Unchanged |
| Warberg Asset Management LLC 0.57% of their portfolio | 1.1m $1.9m | Added +14.8k |
| STATE STREET CORP 0.00% of their portfolio | 916.8k $1.6m | Reduced -41.0k |
| AlphaCentric Advisors LLC 0.87% of their portfolio | 600.0k $1.0m | Unchanged |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 589.1k $1.0m | Added +59.2k |
| Bank Julius Baer & Co. Ltd, Zurich 0.00% of their portfolio | 540.5k $929.7k | Added +1 |
| NORTHERN TRUST CORP 0.00% of their portfolio | 529.7k $911.1k | Added +32.8k |
| Legato Capital Management LLC 0.07% of their portfolio | 512.9k $882.2k | Added +15.4k |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.00% of their portfolio | 463.6k $797.4k | Added +95.0k |
| Sequoia Financial Advisors, LLC 0.00% of their portfolio | 381.4k $655.9k | Added +703 |
| MORGAN STANLEY 0.00% of their portfolio | 332.1k $571.2k | Added +201.3k |
| UBS Group AG 0.00% of their portfolio | 251.3k $432.3k | Added +14.1k |
| Prescott Group Capital Management, L.L.C. 0.04% of their portfolio | 237.5k $408.5k | Unchanged |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 235.0k $404.2k | Reduced -34.1k |
| SEI INVESTMENTS CO 0.00% of their portfolio | 234.6k $403.5k | Reduced -284.3k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 211.6k $364.0k | Added +15.7k |
| Independent Advisor Alliance 0.01% of their portfolio | 208.5k $358.6k | Added +7.5k |
| AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 196.6k $338.2k | Added +131.4k |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 183.1k $314.9k | New |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 173.8k $298.9k | Reduced -47.7k |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 165.4k $284.0k | Added +4.2k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 144.2k $248.0k | Reduced -28.6k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 140.7k $243.0k | Added +23.8k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 130.0k $223.7k | Reduced -2.3k |
| GMT Capital Corp 0.01% of their portfolio | 126.6k $217.7k | Unchanged |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 117.3k $201.8k | Added +67.6k |
| Kovack Advisors, Inc. 0.01% of their portfolio | 101.1k $179.0k | Reduced -7.8k |
| ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio | 91.6k $157.5k | Reduced -44.2k |
| Leonteq Securities AG 0.01% of their portfolio | 75.0k $129.0k | Unchanged |
| Nuveen, LLC 0.00% of their portfolio | 74.0k $127.3k | Unchanged |
| TCFG Investment Advisors, LLC 0.04% of their portfolio | 69.0k $118.7k | Added +5.0k |
| HSBC HOLDINGS PLC 0.00% of their portfolio | 68.6k $116.6k | Unchanged |
| WEALTH EFFECTS LLC 0.03% of their portfolio | 68.5k $117.8k | Unchanged |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 67.5k $116.2k | Added +66.5k |
| BARCLAYS PLC 0.00% of their portfolio | 66.9k $115.1k | Reduced -886 |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 62.2k $107.0k | Added +39.6k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 50.6k $87.0k | Added +175 |
| Cherry Creek Investment Advisors, Inc. 0.03% of their portfolio | 42.6k $73.3k | Added +6.4k |
| Wellington Shields & Co., LLC 0.02% of their portfolio | 40.1k $68.9k | Unchanged |
| Invesco Ltd. 0.00% of their portfolio | 38.6k $66.3k | Added +12.2k |
| Verition Fund Management LLC 0.00% of their portfolio | 35.0k $60.2k | Added +13.0k |
| Vanguard Global Advisers, LLC 0.00% of their portfolio | 34.4k $59.2k | Unchanged |
| CITIGROUP INC 0.00% of their portfolio | 32.0k $55.0k | Added +28.7k |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio | 31.4k $54.0k | Added +2.5k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 30.3k $52.4k | Added +3.0k |
| THOMPSON DAVIS & CO., INC. 0.03% of their portfolio | 28.0k $48.2k | Reduced -2.0k |
| Forum Financial Management, LP 0.00% of their portfolio | 26.5k $45.6k | Unchanged |
| Z3 Capital Partners, LLC 0.01% of their portfolio | 25.0k $43.0k | Reduced -9.0k |
| FMR LLC 0.00% of their portfolio | 24.8k $42.7k | Reduced -4.2k |
| Wealthspire Advisors, LLC 0.00% of their portfolio | 24.0k $41.3k | Reduced -7.5k |
| Summit Asset Management, LLC 0.00% of their portfolio | 22.5k $38.7k | Unchanged |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 21.8k $40.1k | Added +8.0k |
| INTECH INVESTMENT MANAGEMENT LLC 0.00% of their portfolio | 19.2k $33.1k | Added +2.5k |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 19.0k $32.7k | Unchanged |
| Police & Firemen's Retirement System of New Jersey 0.00% of their portfolio | 18.0k $31.0k | Unchanged |
| Investors Research Corp 0.01% of their portfolio | 17.9k $30.9k | Unchanged |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 17.4k $29.9k | Added +11.5k |
| PNC Financial Services Group, Inc. 0.00% of their portfolio | 17.3k $29.8k | Added +123 |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 15.4k $26.5k | Reduced -357.2k |
| R Squared Ltd 0.01% of their portfolio | 13.7k $23.6k | New |
| WealthPLAN Partners, LLC 0.00% of their portfolio | 13.7k $23.5k | Unchanged |
| Cerity Partners LLC 0.00% of their portfolio | 13.6k $23.3k | New |
| CHOREO, LLC 0.00% of their portfolio | 13.1k $22.5k | Reduced -422 |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 11.6k $19.9k | Reduced -565 |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 11.2k $19.2k | Reduced -3.3k |
| LPL Financial LLC 0.00% of their portfolio | 10.9k $18.8k | Added +30 |
| Quadrature Capital Ltd 0.00% of their portfolio | 10.7k $18.4k | New |
| Benin Management CORP 0.00% of their portfolio | 10.5k $18.1k | Unchanged |
| Roble, Belko & Company, Inc 0.00% of their portfolio | 10.0k $17.0k | Unchanged |
| Pasadena Private Wealth, LLC 0.00% of their portfolio | 10.0k $17.2k | New |
| Legal & General Group Plc 0.00% of their portfolio | 7.8k $13.4k | Added +3.1k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio | 7.6k $13.1k | Unchanged |
| Ameritas Investment Partners, Inc. 0.00% of their portfolio | 5.4k $9.2k | Unchanged |
| Rockefeller Capital Management L.P. 0.00% of their portfolio | 5.0k $8.5k | Added +500 |
| Farther Finance Advisors, LLC 0.00% of their portfolio | 4.1k $7.0k | Added +246 |
| Smartleaf Asset Management LLC 0.00% of their portfolio | 3.5k $6.0k | Unchanged |
| GROUP ONE TRADING LLC 0.00% of their portfolio | 2.9k $5.0k | Added +194 |
| SIMPLEX TRADING, LLC 0.00% of their portfolio | 2.9k $5.0k | New |
| NISA INVESTMENT ADVISORS, LLC 0.00% of their portfolio | 2.8k $4.8k | Unchanged |
| Larson Financial Group LLC 0.00% of their portfolio | 2.6k $4.5k | Unchanged |
| Hickory Point Bank & Trust 0.00% of their portfolio | 1.5k $2.6k | Unchanged |
| Arax Advisory Partners 0.00% of their portfolio | 1.4k $2.4k | New |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 1.3k $2.2k | Unchanged |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 1.3k $2.2k | Added +1.2k |
| Avion Wealth 0.00% of their portfolio | 1.0k $1.0k | Unchanged |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 871 $1.5k | Reduced -2.4k |
| Allworth Financial LP 0.00% of their portfolio | 590 $1.0k | Added +344 |
| Integrated Wealth Concepts LLC 0.00% of their portfolio | 550 $946 | New |
| MassMutual Private Wealth & Trust, FSB 0.00% of their portfolio | 467 $803 | New |
| Rossby Financial, LCC 0.00% of their portfolio | 312 $537 | New |
| EverSource Wealth Advisors, LLC 0.00% of their portfolio | 275 $474 | Reduced -35 |
| Essential Partners LLC 0.00% of their portfolio | 200 $344 | Added +119 |
| Sterling Capital Management LLC 0.00% of their portfolio | 184 $316 | Reduced -317 |