DaveManuel.com · Institutional Ownership · Who Owns It
TANDEM DIABETES CARE INC (TNDM)
Institutional ownership reported to the SEC as of Q2 2026, across 32 quarters.
280
Reporting holders
$1.3B
Reported value
113.4%
Of shares outstanding
7.0%
Calls
0.6%
Puts
+2
Holder change
Institutions report 78,869,889 shares against 69,578,707 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end. Over 100% because an adviser and a sub-adviser can both report the same shares, and both are counted.
Calls and puts are the parts of reported value carried in derivative lines rather than shares, and they point in opposite directions: a manager holding calls is positioned for the security, one holding puts against it - or hedging shares they already own, which is why index funds carry so many. Most sites add the two together and report one figure, which averages away the only interesting part.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| BlackRock, Inc. | $174.8M | 11,583,125 | 0.00% | 8q | +8.3%+$13.5M |
| UBS Group AG | $95.4M incl. $78.1M options CALL | 1,146,580 | 0.01% | 31q | -44.0%-$75.0M |
| Sessa Capital IM, L.P. | $77.0M | 5,100,000 | 1.29% | 6q | +7.8%+$5.6M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $64.9M | 4,299,667 | 0.00% | 2q | +7.7%+$4.6M |
| First Light Asset Management, LLC | $51.1M | 3,383,553 | 3.10% | 3q | +157.4%+$31.2M |
| VANGUARD CAPITAL MANAGEMENT LLC | $46.7M | 3,096,536 | 0.00% | 2q | +1.9%+$869.4K |
| STATE STREET CORP | $43.0M | 2,851,646 | 0.00% | 31q | +7.1%+$2.9M |
| GW&K Investment Management, LLC | $38.8M | 2,569,032 | 0.30% | 11q | -4.5%-$1.8M |
| JENNISON ASSOCIATES LLC | $35.2M | 2,331,429 | 0.02% | 13q | +40.6%+$10.2M |
| Paradice Investment Management LLC | $30.5M | 2,024,014 | 4.87% | 13q | -0.9%-$277.8K |
| JACOBS LEVY EQUITY MANAGEMENT, INC | $30.3M | 2,006,429 | 0.11% | 15q | +31.7%+$7.3M |
| Freestone Grove Partners LP | $28.2M | 1,866,134 | 0.18% | 4q | +40.2%+$8.1M |
| CITADEL ADVISORS LLC | $28.0M incl. $1.8M options CALL+PUT | 1,735,879 | 0.00% | 31q | -20.8%-$7.4M |
| GEODE CAPITAL MANAGEMENT, LLC | $27.2M | 1,800,797 | 0.00% | 31q | +7.2%+$1.8M |
| Driehaus Capital Management LLC | $27.0M | 1,786,996 | 0.16% | 3q | -22.5%-$7.8M |
| MILLENNIUM MANAGEMENT LLC | $19.8M | 1,311,739 | 0.01% | 25q | +72.2%+$8.3M |
| Woodline Partners LP | $19.7M | 1,307,439 | 0.06% | new | NEW |
| ArrowMark Colorado Holdings LLC | $19.6M | 1,299,586 | 0.82% | 12q | -58.1%-$27.2M |
| FMR LLC | $14.7M | 976,432 | 0.00% | 31q | +36.8%+$4.0M |
| Point72 Asset Management, L.P. | $13.7M incl. $4.5M options CALL | 610,903 | 0.02% | 2q | +45.3%+$4.3M |
| ROYCE & ASSOCIATES LP | $13.6M | 900,590 | 0.11% | 4q | +29.3%+$3.1M |
| WELLINGTON MANAGEMENT GROUP LLP | $13.2M | 871,811 | 0.00% | 3q | -16.4%-$2.6M |
| GOLDMAN SACHS GROUP INC | $13.0M | 862,301 | 0.00% | 31q | -61.1%-$20.5M |
| NORTHERN TRUST CORP | $11.4M | 753,690 | 0.00% | 31q | +6.7%+$710.5K |
| Verition Fund Management LLC | $10.6M | 700,000 | 0.05% | 6q | +553.5%+$8.9M |
| ExodusPoint Capital Management, LP | $10.4M | 691,789 | 0.07% | 2q | +9.3%+$888.7K |
| Qube Research & Technologies Ltd | $10.3M | 683,823 | 0.01% | 2q | +1216.0%+$9.5M |
| D. E. Shaw & Co., Inc. | $10.3M | 681,808 | 0.00% | 5q | -13.0%-$1.5M |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $10.1M | 667,689 | 0.00% | 3q | +245.0%+$7.2M |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $9.9M | 656,836 | 0.00% | 31q | +2.2%+$214.9K |
| MORGAN STANLEY | $9.8M | 647,069 | 0.00% | 34q | -52.3%-$10.7M |
| Soleus Capital Management, L.P. | $8.7M | 575,000 | 0.30% | 2q | -26.6%-$3.1M |
| BANK OF MONTREAL /CAN/ | $8.5M | 564,966 | 0.00% | 11q | +1409.2%+$8.0M |
| TWO SIGMA INVESTMENTS, LP | $8.4M | 558,409 | 0.01% | 31q | -70.0%-$19.7M |
| AQR CAPITAL MANAGEMENT LLC | $8.1M | 533,837 | 0.00% | 9q | +60.8%+$3.0M |
| VANGUARD FIDUCIARY TRUST CO | $7.4M | 491,103 | 0.00% | 2q | +4.1%+$293.4K |
| Aberdeen Group plc | $6.7M | 441,738 | 0.01% | 8q | +1.8%+$116.4K |
| Jump Financial, LLC | $6.1M | 404,400 | 0.05% | new | NEW |
| BANK OF AMERICA CORP /DE/ | $6.0M | 395,054 | 0.00% | 31q | +5.8%+$329.4K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $5.8M incl. $4.1M options CALL+PUT | 117,958 | 0.00% | 31q | +46.1%+$1.8M |
| FRONTIER CAPITAL MANAGEMENT CO LLC | $5.7M | 380,458 | 0.05% | 31q | -4.2%-$252.8K |
| BARCLAYS PLC | $5.6M incl. $301.8K options PUT | 350,429 | 0.00% | 31q | -16.8%-$1.1M |
| JPMORGAN CHASE & CO | $5.5M | 349,652 | 0.00% | 31q | HELD |
| TUDOR INVESTMENT CORP ET AL | $5.5M | 362,708 | 0.01% | 14q | +359.1%+$4.3M |
| DAFNA Capital Management LLC | $5.4M | 355,208 | 1.02% | 13q | HELD |
| Bank of New York Mellon Corp | $5.3M | 352,161 | 0.00% | 31q | +4.7%+$239.5K |
| PRINCIPAL FINANCIAL GROUP INC | $5.1M | 335,094 | 0.00% | 31q | +1.1%+$53.6K |
| Invesco Ltd. | $4.8M | 321,128 | 0.00% | 31q | +9.2%+$408.6K |
| Y-Intercept (Hong Kong) Ltd | $4.7M | 314,653 | 0.09% | 4q | +304.0%+$3.6M |
| Alberta Investment Management Corp | $4.7M | 313,700 | 0.03% | new | NEW |
| EDMOND DE ROTHSCHILD HOLDING S.A. | $4.7M | 308,200 | 0.06% | 6q | +19.4%+$754.5K |
| Quantinno Capital Management LP | $4.6M | 306,660 | 0.01% | 11q | -53.1%-$5.2M |
| KVP Capital Advisors, LP | $4.5M | 301,000 | 3.33% | new | NEW |
| Meridiem Capital Partners LP | $4.5M | 298,255 | 0.20% | new | NEW |
| FIRST TRUST ADVISORS LP | $4.4M | 292,844 | 0.00% | 2q | -14.5%-$752.4K |
| Holocene Advisors, LP | $4.0M | 267,860 | 0.01% | 3q | -43.9%-$3.2M |
| SECTOR GAMMA AS | $4.0M | 267,091 | 0.87% | 6q | HELD |
| BEACONLIGHT CAPITAL, LLC | $4.0M | 266,009 | 1.42% | 2q | +4.8%+$183.1K |
| ENVESTNET ASSET MANAGEMENT INC | $3.6M | 235,966 | 0.00% | 27q | -3.0%-$109.9K |
| ALGERT GLOBAL LLC | $3.6M | 235,739 | 0.04% | 26q | +100.1%+$1.8M |
| Public Sector Pension Investment Board | $3.6M | 235,458 | 0.01% | 14q | -2.9%-$107.7K |
| ROYAL BANK OF CANADA | $3.4M | 225,174 | 0.00% | 31q | +9.3%+$288.8K |
| Squarepoint Ops LLC | $3.3M | 217,386 | 0.00% | new | NEW |
| XTX Topco Ltd | $3.2M | 212,976 | 0.04% | 2q | +250.2%+$2.3M |
| NOMURA HOLDINGS INC | $2.8M incl. $2.4M options CALL+PUT | 25,889 | 0.00% | new | NEW |
| Connor, Clark & Lunn Investment Management Ltd. | $2.8M | 184,073 | 0.01% | new | NEW |
| JANE STREET GROUP, LLC | $2.6M CALL+PUT | options only | 0.00% | 31q | OPTIONS |
| Jefferies Financial Group Inc. | $2.5M | 166,489 | 0.02% | 2q | +193.5%+$1.7M |
| RHUMBLINE ADVISERS | $2.5M | 164,053 | 0.00% | 31q | -11.9%-$335.9K |
| Nierenberg Investment Management Company, LLC | $2.4M | 158,910 | 1.19% | 3q | +99.9%+$1.2M |
| Nuveen, LLC | $2.4M | 157,066 | 0.00% | 6q | -56.8%-$3.1M |
| Legal & General Group Plc | $2.4M | 155,749 | 0.00% | 31q | HELD |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | $2.3M | 151,847 | 0.00% | 31q | -9.9%-$251.2K |
| Russell Investments Group, Ltd. | $2.2M | 148,584 | 0.00% | 31q | +11.2%+$226.2K |
| Banco Santander, S.A. | $2.2M | 147,200 | 0.01% | 2q | +974.5%+$2.0M |
| IMC-Chicago, LLC | $2.2M CALL+PUT | options only | 0.00% | 8q | OPTIONS |
| VOYA INVESTMENT MANAGEMENT LLC | $2.2M | 142,597 | 0.00% | 31q | -82.3%-$10.0M |
| MIZUHO MARKETS AMERICAS LLC | $2.1M | 137,762 | 0.03% | 9q | -12.5%-$295.8K |
| Swiss National Bank | $2.1M | 137,500 | 0.00% | 31q | +3.2%+$63.4K |
| ACADIAN ASSET MANAGEMENT LLC | $2.1M | 137,237 | 0.00% | 6q | -50.7%-$2.1M |
| Schonfeld Strategic Advisors LLC | $2.0M | 129,567 | 0.01% | new | NEW |
| FEDERATED HERMES, INC. | $1.9M | 123,819 | 0.00% | 3q | HELD |
| RAYMOND JAMES FINANCIAL INC | $1.8M | 122,021 | 0.00% | 7q | -2.7%-$50.2K |
| AMERIPRISE FINANCIAL INC | $1.7M | 113,522 | 0.00% | 31q | -6.3%-$115.1K |
| BANQUE PICTET & CIE SA | $1.7M | 112,335 | 0.01% | 5q | -9.4%-$175.0K |
| Cambridge Investment Research Advisors, Inc. | $1.6M | 104,590 | 0.00% | new | NEW |
| GABELLI FUNDS LLC | $1.6M | 103,000 | 0.01% | 2q | +312.0%+$1.2M |
| Trexquant Investment LP | $1.4M | 90,058 | 0.01% | 5q | -63.9%-$2.4M |
| ALLIANCEBERNSTEIN L.P. | $1.3M | 70,049 | 0.00% | 31q | -4.2%-$59.4K |
| PRICE T ROWE ASSOCIATES INC /MD/ | $1.3M | 88,316 | 0.00% | 31q | +28.6%+$296.7K |
| Cinctive Capital Management LP | $1.3M | 86,906 | 0.05% | 2q | +36.2%+$348.5K |
| Universal- Beteiligungs- und Servicegesellschaft mbH | $1.3M | 84,904 | 0.00% | 6q | -2.8%-$37.0K |
| FIDEURAM - INTESA SANPAOLO PRIVATE BANKING S.P.A. | $1.3M | 84,862 | 0.04% | new | NEW |
| INTECH INVESTMENT MANAGEMENT LLC | $1.2M | 81,071 | 0.01% | 9q | -27.2%-$458.0K |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | $1.2M | 77,227 | 0.00% | 31q | -8.3%-$106.1K |
| Cerity Partners LLC | $1.1M | 76,122 | 0.00% | 10q | HELD |
| DEUTSCHE BANK AG\ | $1.1M | 75,155 | 0.00% | 34q | +24.0%+$219.2K |
| WELLS FARGO & COMPANY/MN | $1.1M | 72,181 | 0.00% | 31q | +128.9%+$613.4K |
| HRT FINANCIAL LP | $1.1M incl. $1.1M options OPT | 71,700 | 0.00% | 2q | -46.9%-$955.9K |
| JONES FINANCIAL COMPANIES LLLP | $1.1M | 66,267 | 0.00% | 10q | +13.5%+$128.0K |
Showing the largest 100 of 280 reported holders.
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q3 2026 | 53 | $50.6M | 3,053,798 | 6 | 15 | 19 | 0.0% |
| Q2 2026 | 280 | $1.3B | 78,869,889 | 45 | 94 | 86 | 7.7% |
| Q1 2026 | 278 | $1.6B | 78,815,759 | 40 | 95 | 93 | 7.2% |
| Q4 2025 | 273 | $1.7B | 74,936,224 | 49 | 82 | 100 | 4.5% |
| Q3 2025 | 257 | $958.8M | 75,455,016 | 43 | 72 | 93 | 4.5% |
| Q2 2025 | 273 | $1.6B | 81,529,029 | 38 | 114 | 70 | 3.8% |
| Q1 2025 | 278 | $1.5B | 73,230,187 | 36 | 106 | 81 | 4.6% |
| Q4 2024 | 318 | $2.7B | 72,085,695 | 30 | 131 | 88 | 4.5% |
| Q3 2024 | 337 | $3.3B | 73,283,403 | 56 | 109 | 115 | 4.8% |
| Q2 2024 | 320 | $3.1B | 73,654,109 | 62 | 122 | 89 | 4.8% |
| Q1 2024 | 295 | $2.9B | 77,026,297 | 51 | 116 | 76 | 4.6% |
| Q4 2023 | 272 | $2.2B | 72,018,544 | 66 | 79 | 82 | 1.5% |
| Q3 2023 | 231 | $1.5B | 69,587,713 | 25 | 74 | 86 | 1.0% |
| Q2 2023 | 249 | $1.7B | 67,166,430 | 35 | 89 | 83 | 0.7% |
| Q1 2023 | 277 | $3.1B | 76,348,186 | 33 | 112 | 89 | 0.4% |
| Q4 2022 | 299 | $2.9B | 64,285,583 | 46 | 98 | 104 | 1.0% |
| Q3 2022 | 291 | $3.1B | 64,747,679 | 38 | 97 | 110 | 1.4% |
| Q2 2022 | 325 | $22.6B | 381,408,407 | 37 | 140 | 107 | 0.3% |
| Q1 2022 | 371 | $25.4B | 217,851,650 | 56 | 141 | 111 | 0.3% |
| Q4 2021 | 392 | $12.2B | 79,377,277 | 68 | 136 | 108 | 2.0% |
| Q3 2021 | 340 | $9.4B | 77,749,177 | 77 | 97 | 106 | 1.7% |
| Q2 2021 | 300 | $7.0B | 70,713,616 | 49 | 102 | 89 | 1.7% |
| Q1 2021 | 291 | $5.6B | 62,320,874 | 44 | 95 | 99 | 2.0% |
| Q4 2020 | 306 | $7.2B | 72,956,924 | 37 | 102 | 100 | 3.0% |
| Q3 2020 | 319 | $15.6B | 134,783,297 | 49 | 107 | 108 | 1.7% |
| Q2 2020 | 300 | $16.1B | 160,852,036 | 67 | 78 | 112 | 1.3% |
| Q1 2020 | 273 | $12.1B | 186,219,444 | 46 | 76 | 103 | 0.6% |
| Q4 2019 | 280 | $11.7B | 195,304,397 | 45 | 83 | 103 | 0.7% |
| Q3 2019 | 271 | $11.1B | 185,651,013 | 43 | 87 | 82 | 1.0% |
| Q2 2019 | 266 | $11.1B | 167,576,986 | 53 | 89 | 89 | 2.2% |
| Q1 2019 | 264 | $11.2B | 173,743,317 | 77 | 76 | 82 | 1.2% |
| Q4 2018 | 201 | $9.0B | 235,437,933 | 2 | 7 | 4 | 1.1% |