Tandem Diabetes Care Inc
TNDM- Exchange
- Nasdaq
- Industry
- Surgical & Medical Instruments & Apparatus
- SEC CIK
- 0001438133
No open-market purchases or sales by Tandem Diabetes Care Inc insiders were filed in the last 90 days; 274 institutions reported holding it in 13F filings for Q2 2026, worth $1.19B in total; no superinvestor holds it.
13F holders, Q2 2026
Institutional positions in Tandem Diabetes Care Inc as of Jun 30, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 274
- +3 vs. Q1 2026
- Shares held
- 78.7M
- +94.9K (+0.1%) vs. Q1 2026
- Total value
- $1.19B
- −$319.1M (−21.2%) vs. Q1 2026
- New holders
- 48
- 95 more added
- Sold out
- 45
- 91 more reduced
3 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting TNDM on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 274 | $1.19B |
| Q1 2026 | 274 | $1.51B |
| Q4 2025 | 269 | $1.65B |
| Q3 2025 | 255 | $911.3M |
| Q2 2025 | 271 | $1.51B |
| Q1 2025 | 275 | $1.40B |
| Q4 2024 | 316 | $2.60B |
| Q3 2024 | 332 | $3.10B |
| Q2 2024 | 317 | $2.96B |
| Q1 2024 | 291 | $2.63B |
| Q4 2023 | 268 | $2.10B |
| Q3 2023 | 226 | $1.45B |
| Q2 2023 | 247 | $1.65B |
| Q1 2023 | 274 | $2.77B |
| Q4 2022 | 295 | $2.89B |
| Q3 2022 | 299 | $3.00B |
| Q2 2022 | 331 | $3.64B |
| Q1 2022 | 379 | $6.92B |
| Q4 2021 | 388 | $9.09B |
| Q3 2021 | 338 | $7.32B |
| Q2 2021 | 303 | $5.75B |
| Q1 2021 | 290 | $5.08B |
Institutions, Q2 2026
Shares, value and share of portfolio for each institution holding Tandem Diabetes Care Inc; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| AdvisorNet Financial, Inc | 1,680 | $25.4K | 0.00% | 00.0% | Unchanged |
| GAMMA Investing LLC | 1,644 | $24.8K | 0.00% | −1,858−53.1% | Reduced |
| First Horizon Corp | 1,639 | $24.7K | 0.00% | +21+1.3% | Added |
| Wellington-Altus USA Inc. | 1,151 | $22.1K | 0.02% | 00.0% | Unchanged |
| Nisa Investment Advisors, LLC | 1,237 | $18.7K | 0.00% | −1,545−55.5% | Reduced |
| Global Retirement Partners, LLC | 1,167 | $17.6K | 0.00% | +1,167 | New |
| CoreCap Advisors, LLC | 1,164 | $17.6K | 0.00% | −119−9.3% | Reduced |
| Allworth Financial LP | 1,138 | $17.2K | 0.00% | +493+76.4% | Added |
| EverSource Wealth Advisors, LLC | 1,130 | $17.1K | 0.00% | −192−14.5% | Reduced |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 1,098 | $16.6K | 0.00% | −250−18.5% | Reduced |
| Salem Investment Counselors Inc | 1,000 | $15.1K | 0.00% | 00.0% | Unchanged |
| Aster Capital Management (DIFC) Ltd | 873 | $13.2K | 0.00% | −957−52.3% | Reduced |
| Nykredit A/S | 825 | $12.4K | 0.00% | +825 | New |
| Hantz Financial Services, Inc. | 828 | $12.0K | 0.00% | +107+14.8% | Added |
| Massmutual Trust Co FSB | 707 | $10.7K | 0.00% | +707 | New |
| Salomon & Ludwin, LLC | 595 | $9.37K | 0.00% | −181−23.3% | Reduced |
| China Universal Asset Management Co., Ltd. | 500 | $7.54K | 0.00% | −4,500−90.0% | Reduced |
| Smartleaf Asset Management LLC | 440 | $6.96K | 0.00% | 00.0% | Unchanged |
| Signaturefd, LLC | 452 | $6.82K | 0.00% | −25−5.2% | Reduced |
| Umb Bank N A | 437 | $6.59K | 0.00% | −7−1.6% | Reduced |
| Optiver Holding B.V. | 434 | $6.55K | 0.00% | +426+5,325.0% | Added |
| Larson Financial Group LLC | 426 | $6.43K | 0.00% | −378−47.0% | Reduced |
| Covestor Ltd | 403 | $6.00K | 0.00% | +18+4.7% | Added |
| Los Angeles Capital Management LLC | 348 | $5.25K | 0.00% | 00.0% | Unchanged |
| Versant Capital Management, Inc | 328 | $4.95K | 0.00% | −3,007−90.2% | Reduced |
| Quent Capital, LLC | 309 | $4.66K | 0.00% | 00.0% | Unchanged |
| Fulcrum Asset Management LLP | 280 | $4.43K | 0.00% | +280 | New |
| Northwestern Mutual Wealth Management Co | 290 | $4.38K | 0.00% | −1,344−82.3% | Reduced |
| Rothschild Investment LLC | 269 | $4.06K | 0.00% | +136+102.3% | Added |
| Essential Partners LLC | 265 | $4.00K | 0.00% | −2,623−90.8% | Reduced |
| Rockefeller Capital Management L.P. | 260 | $3.92K | 0.00% | −173−40.0% | Reduced |
| Sterling Capital Management LLC | 245 | $3.70K | 0.00% | −194−44.2% | Reduced |
| Colonial Trust Co | 215 | $3.40K | 0.00% | +93+76.2% | Added |
| True Wealth Design, LLC | 205 | $3.09K | 0.00% | −2−1.0% | Reduced |
| Harbour Investments, Inc. | 204 | $3.08K | 0.00% | 00.0% | Unchanged |
| National Bank of Canada | 183 | $2.76K | 0.00% | +183 | New |
| SJS Investment Consulting Inc. | 165 | $2.49K | 0.00% | −156−48.6% | Reduced |
| IFP Advisors, Inc | 164 | $2.48K | 0.00% | +95+137.7% | Added |
| Front Row Advisors LLC | 100 | $2.34K | 0.00% | 00.0% | Unchanged |
| Toth Financial Advisory Corp | 100 | $1.51K | 0.00% | 00.0% | Unchanged |
| Continuum Advisory, LLC | 100 | $1.51K | 0.00% | +100 | New |
| Quarry LP | 96 | $1.45K | 0.00% | +96 | New |
| Keating Financial Advisory Services, Inc. | 77 | $1.16K | 0.00% | 00.0% | Unchanged |
| Fortitude Family Office, LLC | 70 | $1.06K | 0.00% | −27−27.8% | Reduced |
| Elequin Capital LP | 67 | $1.01K | 0.00% | +43+179.2% | Added |
| Bessemer Group Inc | 90 | $1.00K | 0.00% | 00.0% | Unchanged |
| Parallel Advisors, LLC | 65 | $981 | 0.00% | −200−75.5% | Reduced |
| ZRC Wealth Management, LLC | 60 | $906 | 0.00% | +46+328.6% | Added |
| TD Private Client Wealth LLC | 60 | $905 | 0.00% | 00.0% | Unchanged |
| Parkside Financial Bank & Trust | 56 | $846 | 0.00% | 00.0% | Unchanged |
| Farmers & Merchants Investments Inc | 50 | $755 | 0.00% | 00.0% | Unchanged |
| IFG Advisory, LLC | 50 | $755 | 0.00% | +50 | New |
| Ritter Daniher Financial Advisory LLC | 50 | $755 | 0.00% | +50 | New |
| Archer Investment Corp | 45 | $679 | 0.00% | +45 | New |
| Cornerstone Planning Group LLC | 40 | $676 | 0.00% | 00.0% | Unchanged |
| Bare Financial Services, Inc | 42 | $634 | 0.00% | 00.0% | Unchanged |
| Golden State Wealth Management, LLC | 41 | $619 | 0.00% | 00.0% | Unchanged |
| Signature Equity Partners, LLC | 41 | $619 | 0.00% | +41 | New |
| Clearstead Advisors, LLC | 35 | $529 | 0.00% | +35 | New |
| Eastern Bank | 32 | $483 | 0.00% | 00.0% | Unchanged |
| SBI Securities Co., Ltd. | 28 | $423 | 0.00% | 00.0% | Unchanged |
| Silver Grove Financial Group, Inc. | 27 | $407 | 0.00% | +27 | New |
| JFS Wealth Advisors, LLC | 24 | $363 | 0.00% | +9+60.0% | Added |
| Transamerica Financial Advisors, Inc. | 17 | $256 | 0.00% | −372−95.6% | Reduced |
| Aventura Private Wealth, LLC | 16 | $241 | 0.00% | +16 | New |
| Accordant Advisory Group Inc | 12 | $182 | 0.00% | 00.0% | Unchanged |
| Cedar Mountain Advisors, LLC | 12 | $181 | 0.00% | 00.0% | Unchanged |
| Ankerstar Wealth, LLC | 11 | $166 | 0.00% | 00.0% | Unchanged |
| Plante Moran Financial Advisors, LLC | 11 | $166 | 0.00% | +11 | New |
| Gilpin Wealth Management, LLC | 9 | $136 | 0.00% | −3−25.0% | Reduced |
| Davis Capital Management | 4 | $60 | 0.00% | +4 | New |
| Huntington National Bank | 1 | $15 | 0.00% | 00.0% | Unchanged |
| Wealth Enhancement Trust Services, Inc. | 1 | $15 | 0.00% | +1 | New |
| Evolution Advisers, Inc. | 5 | $0 | 0.00% | +5 | New |
| Marshall Wace, LLP | 0 | $0 | 0.00% | −1,442,472−100.0% | Sold out |
| Baillie Gifford & Co | 0 | $0 | 0.00% | −1,089,393−100.0% | Sold out |
| Defilade Capital Management, L.P. | 0 | $0 | 0.00% | −761,905−100.0% | Sold out |
| Lisanti Capital Growth, LLC | 0 | $0 | 0.00% | −165,325−100.0% | Sold out |
| Panagora Asset Management Inc | 0 | $0 | 0.00% | −163,695−100.0% | Sold out |
| Toronto Dominion Bank | 0 | $0 | 0.00% | −150,078−100.0% | Sold out |
| Canada Pension Plan Investment Board | 0 | $0 | 0.00% | −118,439−100.0% | Sold out |
| Rice Hall James & Associates, LLC | 0 | $0 | 0.00% | −72,878−100.0% | Sold out |
| Renaissance Technologies LLC | 0 | $0 | 0.00% | −58,227−100.0% | Sold out |
| Twinbeech Capital LP | 0 | $0 | 0.00% | −51,366−100.0% | Sold out |
| Legato Capital Management LLC | 0 | $0 | 0.00% | −50,085−100.0% | Sold out |
| Ieq Capital, LLC | 0 | $0 | 0.00% | −39,007−100.0% | Sold out |
| American Century Companies Inc | 0 | $0 | 0.00% | −33,470−100.0% | Sold out |
| Dynamic Technology Lab Private Ltd | 0 | $0 | 0.00% | −27,886−100.0% | Sold out |
| VARCOV Co. | 0 | $0 | 0.00% | −26,562−100.0% | Sold out |
| Diversified Trust Co | 0 | $0 | 0.00% | −21,332−100.0% | Sold out |
| Colony Group, LLC | 0 | $0 | 0.00% | −17,534−100.0% | Sold out |
| Allianz Asset Management GmbH | 0 | $0 | 0.00% | −16,900−100.0% | Sold out |
| Evergreen Capital Management LLC | 0 | $0 | 0.00% | −12,992−100.0% | Sold out |
| Counterpoint Mutual Funds LLC | 0 | $0 | 0.00% | −12,679−100.0% | Sold out |
| DRW Securities, LLC | 0 | $0 | 0.00% | −12,419−100.0% | Sold out |
| EP Wealth Advisors, LLC | 0 | $0 | 0.00% | −11,886−100.0% | Sold out |
| Syon Capital LLC | 0 | $0 | 0.00% | −11,437−100.0% | Sold out |
| Park Avenue Securities LLC | 0 | $0 | 0.00% | −10,647−100.0% | Sold out |
| ProShare Advisors LLC | 0 | $0 | 0.00% | −10,554−100.0% | Sold out |
| Apollon Wealth Management, LLC | 0 | $0 | 0.00% | −10,534−100.0% | Sold out |