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, Q4 2025
Institutional positions in Tandem Diabetes Care Inc as of Dec 31, 2025. 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
- 269
- +21 vs. Q3 2025
- Shares held
- 74.9M
- +524.4K (+0.7%) vs. Q3 2025
- Total value
- $1.65B
- +$743.2M (+82.4%) vs. Q3 2025
- New holders
- 53
- 85 more added
- Sold out
- 32
- 99 more reduced
7 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2025: 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, Q4 2025
Shares, value and share of portfolio for each institution holding Tandem Diabetes Care Inc; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Jones Financial Companies LLLP | 1,562 | $34.3K | 0.00% | +251+19.1% | Added |
| Quarry LP | 1,437 | $31.6K | 0.01% | −2,258−61.1% | Reduced |
| Smartleaf Asset Management LLC | 1,330 | $29.9K | 0.00% | +593+80.5% | Added |
| Nisa Investment Advisors, LLC | 1,335 | $29.3K | 0.00% | +440+49.2% | Added |
| EverSource Wealth Advisors, LLC | 1,051 | $23.1K | 0.00% | +472+81.5% | Added |
| Fifth Third Bancorp | 1,039 | $22.8K | 0.00% | +145+16.2% | Added |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 979 | $22.0K | 0.00% | +271+38.3% | Added |
| Wellington-Altus USA Inc. | 808 | $17.8K | 0.01% | +808 | New |
| Hantz Financial Services, Inc. | 735 | $16.0K | 0.00% | +697+1,834.2% | Added |
| Northwestern Mutual Wealth Management Co | 686 | $15.1K | 0.00% | +369+116.4% | Added |
| Covestor Ltd | 696 | $15.0K | 0.01% | 00.0% | Unchanged |
| Rockefeller Capital Management L.P. | 627 | $13.8K | 0.00% | +225+56.0% | Added |
| Salomon & Ludwin, LLC | 595 | $13.8K | 0.00% | −9−1.5% | Reduced |
| Global Retirement Partners, LLC | 600 | $13.2K | 0.00% | 00.0% | Unchanged |
| Quadrant Capital Group LLC | 568 | $12.5K | 0.00% | −564−49.8% | Reduced |
| Allworth Financial LP | 542 | $11.9K | 0.00% | +255+88.9% | Added |
| SRS Capital Advisors, Inc. | 498 | $10.9K | 0.00% | −6,653−93.0% | Reduced |
| Quent Capital, LLC | 457 | $10.0K | 0.00% | −60−11.6% | Reduced |
| Sterling Capital Management LLC | 444 | $9.76K | 0.00% | +282+174.1% | Added |
| Clear Street Markets LLC | 432 | $9.49K | 0.00% | +432 | New |
| Caitong International Asset Management Co., Ltd | 431 | $9.47K | 0.00% | −1,774−80.5% | Reduced |
| Transamerica Financial Advisors, Inc. | 389 | $8.55K | 0.00% | 00.0% | Unchanged |
| Torren Management, LLC | 379 | $8.33K | 0.00% | +379 | New |
| Versant Capital Management, Inc | 377 | $8.29K | 0.00% | +49+14.9% | Added |
| Umb Bank N A | 377 | $8.29K | 0.00% | +353+1,470.8% | Added |
| Ancora Advisors, LLC | 360 | $7.91K | 0.00% | +360 | New |
| Signaturefd, LLC | 347 | $7.63K | 0.00% | +115+49.6% | Added |
| Larson Financial Group LLC | 292 | $6.42K | 0.00% | +192+192.0% | Added |
| Los Angeles Capital Management LLC | 348 | $5.08K | 0.00% | +348 | New |
| Harbour Investments, Inc. | 204 | $4.48K | 0.00% | 00.0% | Unchanged |
| MAI Capital Management | 141 | $3.10K | 0.00% | +27+23.7% | Added |
| Colonial Trust Co | 128 | $2.88K | 0.00% | +128 | New |
| Rothschild Investment LLC | 123 | $2.70K | 0.00% | +98+392.0% | Added |
| Newbridge Financial Services Group, Inc. | 120 | $2.64K | 0.00% | −200−62.5% | Reduced |
| Toth Financial Advisory Corp | 100 | $2.20K | 0.00% | 00.0% | Unchanged |
| GWM Advisors LLC | 100 | $2.20K | 0.00% | 00.0% | Unchanged |
| Front Row Advisors LLC | 100 | $2.20K | 0.00% | 00.0% | Unchanged |
| Fortitude Family Office, LLC | 97 | $2.13K | 0.00% | +97 | New |
| Bessemer Group Inc | 90 | $2.00K | 0.00% | +5+5.9% | Added |
| Elequin Capital LP | 90 | $1.98K | 0.00% | +90 | New |
| Golden State Wealth Management, LLC | 80 | $1.76K | 0.00% | +39+95.1% | Added |
| Federation des caisses Desjardins du Quebec | 75 | $1.65K | 0.00% | 00.0% | Unchanged |
| IFP Advisors, Inc | 69 | $1.52K | 0.00% | +4+6.2% | Added |
| True Wealth Design, LLC | 67 | $1.47K | 0.00% | +23+52.3% | Added |
| Parallel Advisors, LLC | 65 | $1.43K | 0.00% | +42+182.6% | Added |
| Bare Financial Services, Inc | 64 | $1.41K | 0.00% | +22+52.4% | Added |
| Massmutual Trust Co FSB | 64 | $1.41K | 0.00% | +64 | New |
| TD Private Client Wealth LLC | 60 | $1.32K | 0.00% | +60 | New |
| Parkside Financial Bank & Trust | 56 | $1.23K | 0.00% | +32+133.3% | Added |
| Farmers & Merchants Investments Inc | 50 | $1.10K | 0.00% | 00.0% | Unchanged |
| Flagship Harbor Advisors, LLC | 49 | $1.08K | 0.00% | +49 | New |
| ORG Partners LLC | 40 | $879 | 0.00% | +40 | New |
| Bell Investment Advisors, Inc | 36 | $792 | 0.00% | +32+800.0% | Added |
| Cornerstone Planning Group LLC | 40 | $764 | 0.00% | −83−67.5% | Reduced |
| Eastern Bank | 32 | $703 | 0.00% | 00.0% | Unchanged |
| Federated Hermes, Inc. | 25 | $550 | 0.00% | +25 | New |
| Basecamp Wealth Advisors LLC | 25 | $550 | 0.00% | +25 | New |
| CIBC Private Wealth Group, LLC | 21 | $462 | 0.00% | +15+250.0% | Added |
| SBI Securities Co., Ltd. | 20 | $440 | 0.00% | −5−20.0% | Reduced |
| Cedar Mountain Advisors, LLC | 20 | $440 | 0.00% | +20 | New |
| JFS Wealth Advisors, LLC | 15 | $330 | 0.00% | 00.0% | Unchanged |
| International Assets Investment Management, LLC | 15 | $330 | 0.00% | +15 | New |
| SJS Investment Consulting Inc. | 11 | $242 | 0.00% | +11 | New |
| Ankerstar Wealth, LLC | 11 | $242 | 0.00% | +11 | New |
| Nemes Rush Group LLC | 8 | $176 | 0.00% | +8 | New |
| Abound Wealth Management | 6 | $132 | 0.00% | 00.0% | Unchanged |
| Gilpin Wealth Management, LLC | 5 | $110 | 0.00% | +5 | New |
| Huntington National Bank | 1 | $22 | 0.00% | 00.0% | Unchanged |
| Dunhill Financial, LLC | 1 | $19 | 0.00% | +1 | New |
| Hood River Capital Management LLC | 0 | $0 | 0.00% | −2,551,644−100.0% | Sold out |
| Connor, Clark & Lunn Investment Management Ltd. | 0 | $0 | 0.00% | −615,221−100.0% | Sold out |
| Walleye Capital LLC | 0 | $0 | 0.00% | −463,376−100.0% | Sold out |
| Brown Capital Management LLC | 0 | $0 | 0.00% | −363,352−100.0% | Sold out |
| Moore Capital Management, LP | 0 | $0 | 0.00% | −220,479−100.0% | Sold out |
| Divisadero Street Capital Management, LP | 0 | $0 | 0.00% | −174,692−100.0% | Sold out |
| Renaissance Technologies LLC | 0 | $0 | 0.00% | −161,500−100.0% | Sold out |
| Dark Forest Capital Management LP | 0 | $0 | 0.00% | −75,535−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −73,545−100.0% | Sold out |
| First Trust Advisors LP | 0 | $0 | 0.00% | −40,730−100.0% | Sold out |
| Quadrature Capital Ltd | 0 | $0 | 0.00% | −26,756−100.0% | Sold out |
| Versor Investments LP | 0 | $0 | 0.00% | −26,200−100.0% | Sold out |
| Handelsbanken Fonder AB | 0 | $0 | 0.00% | −22,000−100.0% | Sold out |
| Prelude Capital Management, LLC | 0 | $0 | 0.00% | −18,754−100.0% | Sold out |
| Keebeck Alpha, LP | 0 | $0 | 0.00% | −16,623−100.0% | Sold out |
| Atom Investors LP | 0 | $0 | 0.00% | −13,521−100.0% | Sold out |
| Everence Capital Management Inc | 0 | $0 | 0.00% | −12,376−100.0% | Sold out |
| Davy Global Fund Management Ltd | 0 | $0 | 0.00% | −11,851−100.0% | Sold out |
| Advisory Services Network, LLC | 0 | $0 | 0.00% | −8,274−100.0% | Sold out |
| Aster Capital Management (DIFC) Ltd | 0 | $0 | 0.00% | −5,149−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −3,558−100.0% | Sold out |
| Salem Investment Counselors Inc | 0 | $0 | 0.00% | −1,000−100.0% | Sold out |
| Clearstead Advisors, LLC | 0 | $0 | 0.00% | −658−100.0% | Sold out |
| Optiver Holding B.V. | 0 | $0 | 0.00% | −460−100.0% | Sold out |
| Principal Securities, Inc. | 0 | $0 | 0.00% | −381−100.0% | Sold out |
| Wealthspire Advisors, LLC | 0 | $0 | 0.00% | −330−100.0% | Sold out |
| Banque Cantonale Vaudoise | 0 | $0 | 0.00% | −237−100.0% | Sold out |
| Mather Group, LLC. | 0 | $0 | 0.00% | −175−100.0% | Sold out |
| Prestige Wealth Management Group LLC | 0 | $0 | 0.00% | −65−100.0% | Sold out |
| Ameritas Advisory Services, LLC | 0 | $0 | 0.00% | −50−100.0% | Sold out |
| Atlantic Trust, LLC | 0 | $0 | 0.00% | −13−100.0% | Sold out |