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 ($38.2k this quarter). Holder counts are more reliable. Shares outstanding: 90.7m as of 2025-07-31, 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 ≈ $2.12. Options: 5 managers hold calls ($117.7k notional), 3 hold puts ($47.1k).
Trends to Q2 2025
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 |
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 2023 | 22 | 23 |
| Q4 2023 | 33 | 19 |
| Q1 2024 | 46 | 22 |
| Q2 2024 | 39 | 42 |
| Q3 2024 | 41 | 26 |
| Q4 2024 | 44 | 21 |
| Q1 2025 | 41 | 30 |
| Q2 2025 | 33 | 36 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2024 | $284.2k | $44.0k | 0.15 |
| Q4 2024 | $821.6k | $32.1k | 0.04 |
| Q1 2025 | $195.8k | $81.1k | 0.41 |
| Q2 2025 | $117.7k | $47.1k | 0.40 |
Biggest buyers
| Warberg Asset Management LLC | Added | +867.9k |
| ROYAL BANK OF CANADA | Added | +370.9k |
| Prescott Group Capital Management, L.L.C. | Added | +350.6k |
| Lagoda Investment Management, L.P. | Added | +307.4k |
| RHUMBLINE ADVISERS | Added | +102.9k |
| BlackRock, Inc. | Added | +94.1k |
| LPL Financial LLC | Added | +86.8k |
| BARCLAYS PLC | Added | +39.9k |
| JANE STREET GROUP, LLC | New | +36.8k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Added | +35.9k |
Biggest sellers
| VANGUARD GROUP INC | Reduced | -231.7k |
| CITADEL ADVISORS LLC | Sold out | -97.9k |
| ENVESTNET ASSET MANAGEMENT INC | Sold out | -89.9k |
| GOLDMAN SACHS GROUP INC | Reduced | -88.1k |
| State of Wyoming | Reduced | -78.5k |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | -78.3k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | -68.2k |
| STATE STREET CORP | Reduced | -35.5k |
| Corebridge Financial, Inc. | Sold out | -27.7k |
| Diametric Capital, LP | Reduced | -25.6k |
Biggest calls
| SIMPLEX TRADING, LLC | Reduced | $38.0k18.1k shares |
| GROUP ONE TRADING LLC | Added | $33.3k15.7k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $25.0k11.8k shares |
| CITADEL ADVISORS LLC | Reduced | $21.4k10.1k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $39.4k18.6k shares |
| GROUP ONE TRADING LLC | Unchanged | $7.6k3.6k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
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 in Q2 2025
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 |
|---|---|---|---|---|---|
| Q3 2023 | 1 | $173.6k | 0 | — | — |
| Q4 2023 | 1 | $131.5k | 0 | — | — |
| Q1 2024 | 0 | — | 0 | — | — |
| Q2 2024 | 1 | $32.2k | 0 | — | — |
| Q3 2024 | 1 | $17.7k | 0 | — | — |
| Q4 2024 | 0 | — | 0 | — | — |
| Q1 2025 | 1 | $113.6k | 0 | — | — |
| Q2 2025 | 0 | — | 0 | — | — |
None reported in Q2 2025.
Holders, Q2 2025
| Manager | Shares | Change |
|---|---|---|
| DAFNA Capital Management LLC 8.01% of their portfolio | 13.7m $29.0m | Unchanged |
| Lagoda Investment Management, L.P. 5.63% of their portfolio | 4.7m $9.9m | Added +307.4k |
| BlackRock, Inc. 0.00% of their portfolio | 3.9m $8.2m | Added +94.1k |
| VANGUARD GROUP INC 0.00% of their portfolio | 3.3m $7.0m | Reduced -231.7k |
| Arbiter Partners Capital Management LLC 5.37% of their portfolio | 2.9m $6.1m | Unchanged |
| ESSEX INVESTMENT MANAGEMENT CO LLC 0.60% of their portfolio | 1.5m $3.3m | Reduced -11.3k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 1.5m $3.1m | Added +13.9k |
| Archon Capital Management LLC 2.23% of their portfolio | 1.3m $2.7m | Unchanged |
| Warberg Asset Management LLC 0.62% of their portfolio | 1.2m $2.5m | Added +867.9k |
| Prescott Group Capital Management, L.L.C. 0.29% of their portfolio | 1.1m $2.4m | Added +350.6k |
| STATE STREET CORP 0.00% of their portfolio | 804.2k $1.7m | Reduced -35.5k |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 526.8k $1.1m | Added +370.9k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 483.0k $1.0m | Reduced -3.1k |
| Legato Capital Management LLC 0.12% of their portfolio | 460.3k $975.8k | Reduced -1.1k |
| State of Wyoming 0.10% of their portfolio | 392.6k $832.2k | Reduced -78.5k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 190.6k $404.0k | Reduced -3.1k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 189.2k $401.1k | Added +35.9k |
| Independent Advisor Alliance 0.01% of their portfolio | 188.7k $400.0k | Reduced -3.0k |
| MORGAN STANLEY 0.00% of their portfolio | 183.0k $388.0k | Reduced -19.8k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 148.9k $315.7k | Added +102.9k |
| BARCLAYS PLC 0.00% of their portfolio | 143.9k $305.1k | Added +39.9k |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 141.4k $299.8k | Unchanged |
| Kovack Advisors, Inc. 0.03% of their portfolio | 134.0k $284.0k | Added +178 |
| GMT Capital Corp 0.01% of their portfolio | 126.6k $268.4k | Unchanged |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 112.0k $237.4k | Reduced -88.1k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 104.4k $221.3k | Reduced -68.2k |
| LPL Financial LLC 0.00% of their portfolio | 98.9k $209.7k | Added +86.8k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 85.0k $181.0k | Added +5.0k |
| Diametric Capital, LP 0.09% of their portfolio | 81.6k $173.1k | Reduced -25.6k |
| WEALTH EFFECTS LLC 0.06% of their portfolio | 75.1k $159.1k | Reduced -3.5k |
| Leonteq Securities AG 0.01% of their portfolio | 75.0k $159.0k | Unchanged |
| Nuveen, LLC 0.00% of their portfolio | 74.0k $156.9k | Unchanged |
| UBS Group AG 0.00% of their portfolio | 70.4k $149.2k | Added +34.6k |
| TCFG WEALTH MANAGEMENT, LLC 0.07% of their portfolio | 68.4k $145.0k | Unchanged |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 56.4k $119.5k | Reduced -6.5k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 46.6k $98.9k | Unchanged |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 46.2k $97.9k | Added +1.8k |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 43.8k $92.9k | Reduced -78.3k |
| Wellington Shields & Co., LLC 0.03% of their portfolio | 43.0k $91.1k | Reduced -1.8k |
| HSBC HOLDINGS PLC 0.00% of their portfolio | 41.5k $89.7k | Reduced -991 |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 36.8k $78.0k | New |
| Cherry Creek Investment Advisors, Inc. 0.04% of their portfolio | 35.9k $76.0k | Reduced -5.0k |
| MetLife Investment Management, LLC 0.00% of their portfolio | 35.8k $75.9k | New |
| AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 33.3k $70.6k | Added +22.1k |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio | 32.8k $69.4k | Reduced -90 |
| PRELUDE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 31.9k $67.7k | Reduced -10.0k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 30.0k $63.7k | Added +2.5k |
| INTECH INVESTMENT MANAGEMENT LLC 0.00% of their portfolio | 28.8k $61.0k | Reduced -11.3k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 28.7k $60.9k | Reduced -10.4k |
| PNC Financial Services Group, Inc. 0.00% of their portfolio | 28.1k $59.6k | Added +37 |
| Forum Financial Management, LP 0.00% of their portfolio | 26.5k $56.2k | Unchanged |
| Invesco Ltd. 0.00% of their portfolio | 26.0k $55.1k | Reduced -54 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio | 23.1k $49.0k | Reduced -5.0k |
| Verition Fund Management LLC 0.00% of their portfolio | 22.0k $46.6k | Unchanged |
| FMR LLC 0.00% of their portfolio | 21.8k $46.2k | Added +16.6k |
| CITIGROUP INC 0.00% of their portfolio | 21.0k $44.6k | Reduced -19.6k |
| Summit Asset Management, LLC 0.01% of their portfolio | 21.0k $44.5k | Added +1.3k |
| Police & Firemen's Retirement System of New Jersey 0.00% of their portfolio | 18.0k $38.2k | Unchanged |
| Investors Research Corp 0.01% of their portfolio | 17.9k $38.1k | Unchanged |
| Polar Capital Holdings Plc 0.00% of their portfolio | 17.7k $37.5k | Reduced -18.1k |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 17.2k $36.4k | Added +9.5k |
| CHOREO, LLC 0.00% of their portfolio | 12.1k $25.6k | Added +979 |
| ProShare Advisors LLC 0.00% of their portfolio | 11.7k $24.9k | Reduced -489 |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 10.8k $22.9k | New |
| WOLVERINE TRADING, LLC 0.00% of their portfolio | 10.3k $23.7k | New |
| Roble, Belko & Company, Inc 0.00% of their portfolio | 10.0k $21.0k | Unchanged |
| NISA INVESTMENT ADVISORS, LLC 0.00% of their portfolio | 8.2k $17.4k | New |
| NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio | 7.6k $16.1k | Unchanged |
| Legal & General Group Plc 0.00% of their portfolio | 6.0k $12.6k | Unchanged |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 5.6k $11.8k | Added +2.2k |
| Ameritas Investment Partners, Inc. 0.00% of their portfolio | 5.4k $11.4k | Unchanged |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 4.0k $8.4k | Unchanged |
| AMALGAMATED BANK 0.00% of their portfolio | 1.9k $4.0k | Unchanged |
| CWM, LLC 0.00% of their portfolio | 1.7k $4.0k | Added +996 |
| GROUP ONE TRADING LLC 0.00% of their portfolio | 1.4k $3.1k | Unchanged |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 1.2k $2.6k | Reduced -103 |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 760 $1.6k | Unchanged |
| JONES FINANCIAL COMPANIES LLLP 0.00% of their portfolio | 750 $1.7k | New |
| Smartleaf Asset Management LLC 0.00% of their portfolio | 501 $1.1k | New |
| EverSource Wealth Advisors, LLC 0.00% of their portfolio | 331 $702 | Added +231 |
| CIBC Private Wealth Group LLC 0.00% of their portfolio | 300 $636 | Unchanged |
| SBI Securities Co., Ltd. 0.00% of their portfolio | 267 $566 | Unchanged |
| Compass Planning Associates Inc 0.00% of their portfolio | 244 $517 | Unchanged |
| Sterling Capital Management LLC 0.00% of their portfolio | 196 $416 | Added +70 |
| Clark Wealth Partners 0.00% of their portfolio | 100 $212 | Unchanged |
| True Wealth Design, LLC 0.00% of their portfolio | 56 $119 | Added +10 |
| Essential Partners LLC 0.00% of their portfolio | 9 $19 | First filing |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. — of their portfolio | 0 $0 | Unchanged |