Institutional HoldersBeta
Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.
Share classes (cover page of the 10-Q filed 2026-08-12, as of 2026-07-31)
| Class | Listed | Shares outstanding | Held by 13F filers | % of class | Holders | CUSIP |
|---|---|---|---|---|---|---|
| Common stock | STXS · NYSEAMER | 100,202,178 | 45,946,354 | 45.9% | 108 | 85916J409 |
Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.
Top holders (108 of 108 · 85916J409)
change vs 2026-03-31| # | Filer | Shares | % of class | Value | Change |
|---|---|---|---|---|---|
| 1 | DAFNA Capital Management LLC | 13,680,554 | 13.65% | $23.5M | — |
| 2 | Arbiter Partners Capital Management LLC | 5,767,712 | 5.76% | $9.9M | +2,883,856 (+100.0%) |
| 3 | BlackRock, Inc. | 4,396,835 | 4.39% | $7.6M | +440,592 (+11.1%) |
| 4 | Lagoda Investment Management, L.P. | 4,122,600 | 4.11% | $7.1M | -227,800 (-5.2%) |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 3,044,820 | 3.04% | $5.2M | +46,776 (+1.6%) |
| 6 | GEODE CAPITAL MANAGEMENT, LLC | 1,895,243 | 1.89% | $3.3M | +219,835 (+13.1%) |
| 7 | ESSEX INVESTMENT MANAGEMENT CO LLC | 1,521,966 | 1.52% | $2.6M | -68,135 (-4.3%) |
| 8 | Archon Capital Management LLC | 1,226,044 | 1.22% | $2.1M | — |
| 9 | Warberg Asset Management LLC | 1,108,889 | 1.11% | $1.9M | +14,766 (+1.3%) |
| 10 | STATE STREET CORP | 916,780 | 0.91% | $1.6M | -40,988 (-4.3%) |
| 11 | AlphaCentric Advisors LLC | 600,000 | 0.60% | $1.0M | — |
| 12 | VANGUARD FIDUCIARY TRUST CO | 589,110 | 0.59% | $1.0M | +59,240 (+11.2%) |
| 13 | Bank Julius Baer & Co. Ltd, Zurich | 540,530 | 0.54% | $930K | +1 (+0.0%) |
| 14 | NORTHERN TRUST CORP | 529,695 | 0.53% | $911K | +32,769 (+6.6%) |
| 15 | Legato Capital Management LLC | 512,907 | 0.51% | $882K | +15,384 (+3.1%) |
| 16 | VANGUARD PORTFOLIO MANAGEMENT LLC | 463,580 | 0.46% | $797K | +94,951 (+25.8%) |
| 17 | Sequoia Financial Advisors, LLC | 381,355 | 0.38% | $656K | +703 (+0.2%) |
| 18 | MORGAN STANLEY | 332,107 | 0.33% | $571K | +201,304 (+153.9%) |
| 19 | UBS Group AG | 251,333 | 0.25% | $432K | +14,055 (+5.9%) |
| 20 | Prescott Group Capital Management, L.L.C. | 237,495 | 0.24% | $408K | — |
| 21 | GOLDMAN SACHS GROUP INC | 234,971 | 0.23% | $404K | -34,075 (-12.7%) |
| 22 | SEI INVESTMENTS CO | 234,612 | 0.23% | $404K | -284,272 (-54.8%) |
| 23 | Bank of New York Mellon Corp | 211,641 | 0.21% | $364K | +15,665 (+8.0%) |
| 24 | Independent Advisor Alliance | 208,485 | 0.21% | $359K | +7,500 (+3.7%) |
| 25 | AQR CAPITAL MANAGEMENT LLC | 196,622 | 0.20% | $338K | +131,351 (+201.2%) |
| 26 | CITADEL ADVISORS LLC | 183,087 | 0.18% | $315K | NEW |
| 27 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | 173,775 | 0.17% | $299K | -47,700 (-21.5%) |
| 28 | ROYAL BANK OF CANADA | 165,363 | 0.17% | $284K | +4,180 (+2.6%) |
| 29 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 144,166 | 0.14% | $248K | -28,581 (-16.5%) |
| 30 | PRICE T ROWE ASSOCIATES INC /MD/ | 140,702 | 0.14% | $243K | +23,781 (+20.3%) |
| 31 | RHUMBLINE ADVISERS | 130,042 | 0.13% | $224K | -2,311 (-1.7%) |
| 32 | GMT Capital Corp | 126,581 | 0.13% | $218K | — |
| 33 | BANK OF AMERICA CORP /DE/ | 117,318 | 0.12% | $202K | +67,571 (+135.8%) |
| 34 | Kovack Advisors, Inc. | 101,113 | 0.10% | $179K | -7,791 (-7.2%) |
| 35 | ENVESTNET ASSET MANAGEMENT INC | 91,578 | 0.09% | $158K | -44,194 (-32.6%) |
| 36 | Leonteq Securities AG | 74,994 | 0.07% | $129K | — |
| 37 | Nuveen, LLC | 73,990 | 0.07% | $127K | — |
| 38 | TCFG Investment Advisors, LLC | 69,015 | 0.07% | $119K | +5,000 (+7.8%) |
| 39 | HSBC HOLDINGS PLC | 68,605 | 0.07% | $117K | — |
| 40 | WEALTH EFFECTS LLC | 68,500 | 0.07% | $118K | — |
| 41 | DEUTSCHE BANK AG\ | 67,537 | 0.07% | $116K | +66,521 (+6547.3%) |
| 42 | BARCLAYS PLC | 66,940 | 0.07% | $115K | -886 (-1.3%) |
| 43 | WELLS FARGO & COMPANY/MN | 62,191 | 0.06% | $107K | +39,564 (+174.9%) |
| 44 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 50,559 | 0.05% | $87K | +175 (+0.3%) |
| 45 | Cherry Creek Investment Advisors, Inc. | 42,602 | 0.04% | $73K | +6,386 (+17.6%) |
| 46 | Wellington Shields & Co., LLC | 40,079 | 0.04% | $69K | — |
| 47 | Invesco Ltd. | 38,570 | 0.04% | $66K | +12,152 (+46.0%) |
| 48 | Verition Fund Management LLC | 35,000 | 0.03% | $60K | +13,000 (+59.1%) |
| 49 | Vanguard Global Advisers, LLC | 34,392 | 0.03% | $59K | — |
| 50 | CITIGROUP INC | 31,998 | 0.03% | $55K | +28,659 (+858.3%) |
| 51 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 31,393 | 0.03% | $54K | +2,492 (+8.6%) |
| 52 | JPMORGAN CHASE & CO | 30,297 | 0.03% | $52K | +3,006 (+11.0%) |
| 53 | THOMPSON DAVIS & CO., INC. | 27,999 | 0.03% | $48K | -2,000 (-6.7%) |
| 54 | Forum Financial Management, LP | 26,518 | 0.03% | $46K | — |
| 55 | Z3 Capital Partners, LLC | 25,000 | 0.02% | $43K | -9,000 (-26.5%) |
| 56 | FMR LLC | 24,800 | 0.02% | $43K | -4,160 (-14.4%) |
| 57 | Wealthspire Advisors, LLC | 24,000 | 0.02% | $41K | -7,500 (-23.8%) |
| 58 | Summit Asset Management, LLC | 22,500 | 0.02% | $39K | — |
| 59 | ALLIANCEBERNSTEIN L.P. | 21,780 | 0.02% | $40K | +8,000 (+58.1%) |
| 60 | INTECH INVESTMENT MANAGEMENT LLC | 19,239 | 0.02% | $33K | +2,471 (+14.7%) |
| 61 | RAYMOND JAMES FINANCIAL INC | 19,033 | 0.02% | $33K | — |
| 62 | Police & Firemen's Retirement System of New Jersey | 17,997 | 0.02% | $31K | — |
| 63 | Investors Research Corp | 17,950 | 0.02% | $31K | — |
| 64 | Russell Investments Group, Ltd. | 17,408 | 0.02% | $30K | +11,543 (+196.8%) |
| 65 | PNC Financial Services Group, Inc. | 17,304 | 0.02% | $30K | +123 (+0.7%) |
| 66 | RENAISSANCE TECHNOLOGIES LLC | 15,400 | 0.02% | $26K | -357,200 (-95.9%) |
| 67 | R Squared Ltd | 13,727 | 0.01% | $24K | NEW |
| 68 | WealthPLAN Partners, LLC | 13,665 | 0.01% | $24K | — |
| 69 | Cerity Partners LLC | 13,572 | 0.01% | $23K | NEW |
| 70 | CHOREO, LLC | 13,058 | 0.01% | $22K | -422 (-3.1%) |
| 71 | Tower Research Capital LLC (TRC) | 11,593 | 0.01% | $20K | -565 (-4.6%) |
| 72 | BNP PARIBAS FINANCIAL MARKETS | 11,153 | 0.01% | $19K | -3,281 (-22.7%) |
| 73 | LPL Financial LLC | 10,930 | 0.01% | $19K | +30 (+0.3%) |
| 74 | Quadrature Capital Ltd | 10,706 | 0.01% | $18K | NEW |
| 75 | Benin Management CORP | 10,500 | 0.01% | $18K | — |
| 76 | Pasadena Private Wealth, LLC | 10,000 | 0.01% | $17K | NEW |
| 77 | Roble, Belko & Company, Inc | 10,000 | 0.01% | $17K | — |
| 78 | Legal & General Group Plc | 7,819 | 0.01% | $13K | +3,086 (+65.2%) |
| 79 | NEW YORK STATE COMMON RETIREMENT FUND | 7,600 | 0.01% | $13K | — |
| 80 | Ameritas Investment Partners, Inc. | 5,370 | 0.01% | $9K | — |
| 81 | Rockefeller Capital Management L.P. | 4,950 | 0.00% | $9K | +500 (+11.2%) |
| 82 | Farther Finance Advisors, LLC | 4,097 | 0.00% | $7K | +246 (+6.4%) |
| 83 | Smartleaf Asset Management LLC | 3,480 | 0.00% | $6K | — |
| 84 | GROUP ONE TRADING LLC | 2,936 | 0.00% | $5K | +194 (+7.1%) |
| 85 | SIMPLEX TRADING, LLC | 2,880 | 0.00% | $5K | NEW |
| 86 | NISA INVESTMENT ADVISORS, LLC | 2,794 | 0.00% | $5K | — |
| 87 | Larson Financial Group LLC | 2,622 | 0.00% | $5K | — |
| 88 | Hickory Point Bank & Trust | 1,500 | 0.00% | $3K | — |
| 89 | Arax Advisory Partners | 1,420 | 0.00% | $2K | NEW |
| 90 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 1,261 | 0.00% | $2K | — |
| 91 | OSAIC HOLDINGS, INC. | 1,260 | 0.00% | $2K | +1,200 (+2000.0%) |
| 92 | Avion Wealth | 1,000 | 0.00% | $1K | — |
| 93 | CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | 871 | 0.00% | $1K | -2,411 (-73.5%) |
| 94 | Allworth Financial LP | 590 | 0.00% | $1K | +344 (+139.8%) |
| 95 | MassMutual Private Wealth & Trust, FSB | 467 | 0.00% | $803 | NEW |
| 96 | Rossby Financial, LCC | 312 | 0.00% | $537 | NEW |
| 97 | EverSource Wealth Advisors, LLC | 275 | 0.00% | $474 | -35 (-11.3%) |
| 98 | Essential Partners LLC | 200 | 0.00% | $344 | +119 (+146.9%) |
| 99 | Sterling Capital Management LLC | 184 | 0.00% | $316 | -317 (-63.3%) |
| 100 | ROTHSCHILD INVESTMENT LLC | 103 | 0.00% | $177 | +57 (+123.9%) |
| 101 | Clark Wealth Partners | 100 | 0.00% | $172 | — |
| 102 | Fortitude Family Office, LLC | 84 | 0.00% | $144 | NEW |
| 103 | SJS Investment Consulting Inc. | 28 | 0.00% | $49 | +26 (+1300.0%) |
| 104 | IFP Advisors, Inc | 14 | 0.00% | $24 | +9 (+180.0%) |
| 105 | SBI Securities Co., Ltd. | 11 | 0.00% | $19 | +8 (+266.7%) |
| 106 | Clearstead Advisors, LLC | 9 | 0.00% | $16 | NEW |
| 107 | JPL Wealth Management, LLC | 8 | 0.00% | $14 | NEW |
| 108 | Caitong International Asset Management Co., Ltd | 4 | 0.00% | $7 | +3 (+300.0%) |
Exited since 2026-03-31 (19 filers; largest 19 shown)
Large holders from 13D/13G (latest per reporting person, last 2 years)
Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.
| Reporting person | Form | Filed | Event | Shares | % of class |
|---|---|---|---|---|---|
| Daniel Louis Kaufman | SCHEDULE 13G | 2026-08-19 | 2026-08-12 | 5,956,714 | 5.9% |
| Lagoda Investment Management, L.P. | SCHEDULE 13G/A | 2026-05-15 | 2026-03-31 | 4,350,400 | 4.5% |
Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.