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, Q3 2021
Institutional positions in Tandem Diabetes Care Inc as of Sep 30, 2021. 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
- 338
- +41 vs. Q2 2021
- Shares held
- 61.3M
- +2.48M (+4.2%) vs. Q2 2021
- Total value
- $7.32B
- +$1.59B (+27.8%) vs. Q2 2021
- New holders
- 80
- 106 more added
- Sold out
- 39
- 106 more reduced
6 institutions that held it in Q2 2021 haven't filed for Q3 2021 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 2021: 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, Q3 2021
Shares, value and share of portfolio for each institution holding Tandem Diabetes Care Inc; share changes are against Q2 2021.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Susquehanna Fundamental Investments, LLC | 54,081 | $6.46M | 0.12% | +42,038+349.1% | Added |
| Lisanti Capital Growth, LLC | 52,900 | $6.32M | 0.93% | +11,580+28.0% | Added |
| PDT Partners, LLC | 51,003 | $6.09M | 0.44% | −8,200−13.9% | Reduced |
| Texas Permanent School Fund | 46,625 | $5.57M | 0.07% | +46,625 | New |
| First Republic Investment Management, Inc. | 45,308 | $5.41M | 0.01% | −4,443−8.9% | Reduced |
| Twin Tree Management, LP | 45,173 | $5.39M | 0.16% | +567+1.3% | Added |
| Assenagon Asset Management S.A. | 44,636 | $5.33M | 0.02% | −355,116−88.8% | Reduced |
| Capital International Inc | 44,568 | $5.32M | 0.05% | −3,579−7.4% | Reduced |
| Amalgamated Bank | 44,570 | $5.32M | 0.04% | +32,848+280.2% | Added |
| ExodusPoint Capital Management, LP | 42,958 | $5.13M | 0.08% | −27,154−38.7% | Reduced |
| State of New Jersey Common Pension Fund D | 37,776 | $4.51M | 0.01% | −599−1.6% | Reduced |
| Public Employees Retirement System of Ohio | 36,650 | $4.38M | 0.02% | −769−2.1% | Reduced |
| Algert Global LLC | 36,418 | $4.35M | 0.58% | +2,338+6.9% | Added |
| Capital International Ltd | 36,329 | $4.34M | 0.24% | −361−1.0% | Reduced |
| Candriam Luxembourg S.C.A. | 35,587 | $4.25M | 0.03% | −38,000−51.6% | Reduced |
| Royal Bank of Canada | 32,198 | $3.84M | 0.00% | −4,172−11.5% | Reduced |
| Kennedy Capital Management, Inc. | 32,079 | $3.83M | 0.09% | −24,859−43.7% | Reduced |
| Castleark Management LLC | 30,990 | $3.70M | 0.14% | +30,990 | New |
| CastleArk Alternatives, LLC | 30,990 | $3.70M | 0.14% | +30,990 | New |
| Cinctive Capital Management LP | 30,773 | $3.67M | 0.20% | −51,358−62.5% | Reduced |
| Spouting Rock Asset Management, LLC | 30,686 | $3.66M | 1.83% | +2,050+7.2% | Added |
| Comerica Bank | 28,557 | $3.63M | 0.02% | +28,557 | New |
| MetLife Investment Management | 30,280 | $3.61M | 0.03% | +30,280 | New |
| State of Tennessee, Treasury Department | 30,000 | $3.58M | 0.01% | +30,000 | New |
| Great West Life Assurance Co | 29,605 | $3.56M | 0.01% | +26,151+757.1% | Added |
| SG Americas Securities, LLC | 29,636 | $3.54M | 0.02% | −28,897−49.4% | Reduced |
| Prudential Financial Inc | 29,362 | $3.52M | 0.00% | −4,134−12.3% | Reduced |
| LPL Financial LLC | 28,964 | $3.46M | 0.00% | +9,385+47.9% | Added |
| Mirabella Financial Services LLP | 28,861 | $3.45M | 0.45% | +7,008+32.1% | Added |
| Schonfeld Strategic Advisors LLC | 28,370 | $3.39M | 0.04% | +5,481+23.9% | Added |
| Crown Advisors Management, Inc. | 25,000 | $2.98M | 2.10% | 00.0% | Unchanged |
| First Trust Advisors LP | 24,452 | $2.92M | 0.00% | +24,452 | New |
| Stifel Financial Corp | 24,206 | $2.89M | 0.00% | +1,827+8.2% | Added |
| Bank of Montreal | 23,926 | $2.89M | 0.00% | +4,758+24.8% | Added |
| HighMark Wealth Management LLC | 23,618 | $2.82M | 2.08% | +15+0.1% | Added |
| Raymond James Financial Services Advisors, Inc. | 22,468 | $2.68M | 0.01% | +14,352+176.8% | Added |
| Treasurer of the State of North Carolina | 21,979 | $2.62M | 0.02% | +739+3.5% | Added |
| Oregon Public Employees Retirement Fund | 21,096 | $2.52M | 0.03% | +21,096 | New |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 20,823 | $2.49M | 0.03% | +20,823 | New |
| Magnetar Financial LLC | 19,846 | $2.37M | 0.02% | +19,846 | New |
| Quantitative Investment Management, LLC | 19,605 | $2.34M | 0.21% | +19,605 | New |
| Bridge City Capital, LLC | 19,336 | $2.31M | 1.05% | −5,148−21.0% | Reduced |
| Thrivent Financial for Lutherans | 19,287 | $2.30M | 0.00% | +19,287 | New |
| Susquehanna International Group, LLP | 18,647 | $2.23M | 0.00% | −19,893−51.6% | Reduced |
| Winton Group Ltd | 18,599 | $2.22M | 0.12% | −1,000−5.1% | Reduced |
| Beacon Investment Advisory Services, Inc. | 18,184 | $2.17M | 0.09% | +3,568+24.4% | Added |
| Granite Point Capital Management, L.P. | 17,708 | $2.11M | 0.82% | 00.0% | Unchanged |
| Raymond James & Associates | 17,595 | $2.10M | 0.00% | −1,152−6.1% | Reduced |
| Connor, Clark & Lunn Investment Management Ltd. | 17,200 | $2.05M | 0.01% | +17,200 | New |
| Arizona State Retirement System | 17,062 | $2.04M | 0.02% | +71+0.4% | Added |
| Chartwell Investment Partners, LLC | 16,777 | $2.00M | 0.06% | 00.0% | Unchanged |
| Ameritas Investment Partners, Inc. | 16,696 | $1.99M | 0.07% | +16,696 | New |
| Louisiana State Employees Retirement System | 16,100 | $1.92M | 0.05% | +16,100 | New |
| Tributary Capital Management, LLC | 15,900 | $1.90M | 0.15% | +15,900 | New |
| Marshall Wace, LLP | 15,804 | $1.89M | 0.01% | +15,804 | New |
| State of Michigan Retirement System | 15,800 | $1.89M | 0.01% | +15,800 | New |
| EAM Investors, LLC | 15,622 | $1.86M | 0.31% | +15,622 | New |
| Polar Capital Holdings Plc | 15,173 | $1.81M | 0.01% | −3,521−18.8% | Reduced |
| Capital Fund Management S.A. | 15,094 | $1.80M | 0.05% | +15,094 | New |
| Banque Pictet & Cie SA | 14,685 | $1.75M | 0.02% | +1,701+13.1% | Added |
| Cetera Advisor Networks LLC | 14,286 | $1.71M | 0.02% | +3,165+28.5% | Added |
| D. E. Shaw & Co., Inc. | 14,265 | $1.70M | 0.00% | −929−6.1% | Reduced |
| Guggenheim Capital LLC | 14,247 | $1.70M | 0.01% | +1,086+8.3% | Added |
| Metropolitan Life Insurance Co | 14,173 | $1.69M | 0.02% | +10,126+250.2% | Added |
| Twin Capital Management Inc | 14,045 | $1.68M | 0.17% | +14,045 | New |
| Mercer Global Advisors Inc | 13,850 | $1.65M | 0.01% | −28−0.2% | Reduced |
| Sectoral Asset Management Inc | 13,750 | $1.64M | 0.14% | −18,350−57.2% | Reduced |
| Seven Eight Capital, LP | 13,514 | $1.61M | 0.16% | +13,514 | New |
| Davy Global Fund Management Ltd | 13,090 | $1.56M | 0.24% | 00.0% | Unchanged |
| New Mexico Educational Retirement Board | 13,000 | $1.55M | 0.05% | +13,000 | New |
| Envestnet Asset Management Inc | 12,851 | $1.53M | 0.00% | +1,527+13.5% | Added |
| Ensign Peak Advisors, Inc | 12,900 | $1.53M | 0.00% | +12,900 | New |
| Xponance, Inc. | 12,770 | $1.52M | 0.03% | +5,996+88.5% | Added |
| Engineers Gate Manager LP | 12,716 | $1.52M | 0.09% | +4,492+54.6% | Added |
| AlphaCrest Capital Management LLC | 12,160 | $1.45M | 0.08% | −296−2.4% | Reduced |
| Strategic Wealth Partners, Ltd. | 11,788 | $1.41M | 0.41% | +3,806+47.7% | Added |
| ETF Managers Group, LLC | 11,417 | $1.37M | 0.03% | +11,417 | New |
| Handelsbanken Fonder AB | 11,100 | $1.32M | 0.01% | 00.0% | Unchanged |
| Illinois Municipal Retirement Fund | 10,851 | $1.29M | 0.05% | 00.0% | Unchanged |
| Virginia Retirement Systems Et Al | 10,500 | $1.25M | 0.01% | −3,100−22.8% | Reduced |
| 1492 Capital Management LLC | 10,498 | $1.25M | 0.64% | −165−1.5% | Reduced |
| Weiss Multi-Strategy Advisers LLC | 10,412 | $1.24M | 0.03% | +225+2.2% | Added |
| Northwestern Mutual Investment Management Company, LLC | 10,412 | $1.24M | 0.02% | +10,412 | New |
| Teacher Retirement System of Texas | 10,077 | $1.20M | 0.01% | +2,533+33.6% | Added |
| Commonwealth Equity Services, LLC | 9,787 | $1.17M | 0.00% | +503+5.4% | Added |
| State of Alaska, Department of Revenue | 9,675 | $1.16M | 0.01% | +9,675 | New |
| Bank of Nova Scotia | 9,543 | $1.14M | 0.00% | −160,457−94.4% | Reduced |
| US Bancorp | 9,239 | $1.10M | 0.00% | +3,812+70.2% | Added |
| Baird Financial Group, Inc. | 9,052 | $1.08M | 0.00% | +9,052 | New |
| Precept Management LLC | 9,000 | $1.07M | 1.02% | 00.0% | Unchanged |
| Teachers Retirement System of the State of Kentucky | 9,000 | $1.07M | 0.01% | +9,000 | New |
| Avestar Capital, LLC | 8,875 | $1.06M | 0.21% | +8,875 | New |
| Roundview Capital LLC | 8,862 | $1.06M | 0.12% | 00.0% | Unchanged |
| Manchester Capital Management LLC | 8,573 | $1.02M | 0.14% | −10.0% | Reduced |
| BI Asset Management Fondsmaeglerselskab A/S | 8,433 | $1.01M | 0.04% | 00.0% | Unchanged |
| Walleye Capital LLC | 8,247 | $985.0K | 0.03% | +8,247 | New |
| Russell Investments Group, Ltd. | 8,159 | $971.0K | 0.00% | −4,179−33.9% | Reduced |
| Public Employees Retirement Association of Colorado | 8,105 | $968.0K | 0.00% | 00.0% | Unchanged |
| Summit Global Investments | 7,700 | $919.0K | 0.07% | −3,600−31.9% | Reduced |
| Greenwood Capital Associates LLC | 7,651 | $913.0K | 0.14% | +81+1.1% | Added |