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 |
|---|---|---|---|---|---|
| HSBC Holdings PLC | 3,980 | $477.0K | 0.00% | −10,379−72.3% | Reduced |
| First Manhattan Co | 4,000 | $477.0K | 0.00% | 00.0% | Unchanged |
| Trexquant Investment LP | 4,140 | $494.0K | 0.04% | −4,548−52.3% | Reduced |
| Range Financial Group LLC | 4,154 | $496.0K | 0.36% | +4,154 | New |
| FORA Capital, LLC | 4,175 | $498.0K | 0.13% | −701−14.4% | Reduced |
| Synovus Financial Corp | 4,139 | $499.0K | 0.01% | +4,139 | New |
| Canada Pension Plan Investment Board | 4,264 | $509.0K | 0.00% | +957+28.9% | Added |
| Landsberg, Bennett, & Dubbaneh LLC | 4,291 | $520.0K | 0.07% | +4,291 | New |
| Bank Julius Baer & Co. Ltd, Zurich | 4,400 | $525.0K | 0.00% | −5−0.1% | Reduced |
| Newbridge Financial Services Group, Inc. | 4,460 | $532.0K | 0.33% | +110+2.5% | Added |
| Pacer Advisors, Inc. | 4,541 | $542.0K | 0.01% | +4,541 | New |
| Spearhead Capital Advisors, LLC | 4,586 | $547.0K | 0.07% | −16−0.3% | Reduced |
| Tocqueville Asset Management L.P. | 4,600 | $549.0K | 0.01% | 00.0% | Unchanged |
| Janney Montgomery Scott LLC | 4,699 | $561.0K | 0.00% | −396−7.8% | Reduced |
| Maryland State Retirement & Pension System | 4,800 | $581.0K | 0.02% | 00.0% | Unchanged |
| Bayesian Capital Management, LP | 4,900 | $585.0K | 0.17% | +4,900 | New |
| Pictet & Cie (Europe) SA | 4,918 | $587.0K | 0.02% | −473−8.8% | Reduced |
| WealthTrust Axiom LLC | 5,000 | $596.0K | 0.20% | −1,000−16.7% | Reduced |
| Acadian Asset Management LLC | 5,041 | $599.0K | 0.00% | +4,669+1,255.1% | Added |
| Partners Group Holding AG | 5,171 | $617.0K | 0.04% | +5,171 | New |
| Advisor Group Holdings, Inc. | 5,299 | $639.0K | 0.00% | +312+6.3% | Added |
| The PNC Financial Services Group, Inc. | 5,600 | $669.0K | 0.00% | +438+8.5% | Added |
| Securian Asset Management, Inc | 5,652 | $675.0K | 0.01% | +5,652 | New |
| ProShare Advisors LLC | 5,847 | $698.0K | 0.00% | +3,582+158.1% | Added |
| Cresset Asset Management, LLC | 6,000 | $716.0K | 0.01% | 00.0% | Unchanged |
| Legal Advantage Investments, Inc. | 6,000 | $716.0K | 0.48% | +1,000+20.0% | Added |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 6,310 | $753.0K | 0.00% | 00.0% | Unchanged |
| Oppenheimer & Co Inc | 6,341 | $757.0K | 0.01% | −2,009−24.1% | Reduced |
| BNP Paribas Arbitrage, SA | 6,453 | $770.4K | 0.00% | −16,273−71.6% | Reduced |
| Diversified Trust Co | 6,492 | $775.0K | 0.03% | +246+3.9% | Added |
| HighTower Advisors, LLC | 6,625 | $783.0K | 0.00% | +1,969+42.3% | Added |
| Verition Fund Management LLC | 6,820 | $814.0K | 0.01% | +2,853+71.9% | Added |
| Cambridge Investment Research Advisors, Inc. | 6,964 | $831.0K | 0.00% | −200−2.8% | Reduced |
| Shelton Capital Management | 7,200 | $860.0K | 0.03% | −800−10.0% | Reduced |
| Columbia Asset Management | 7,265 | $867.0K | 0.19% | +1,480+25.6% | Added |
| Silvant Capital Management LLC | 7,307 | $872.0K | 0.16% | 00.0% | Unchanged |
| Maverick Capital LtdSuperinvestorMaverick Capital | 7,320 | $874.0K | 0.01% | +7,320 | New |
| Ausdal Financial Partners, Inc. | 7,510 | $897.0K | 0.13% | −1,000−11.8% | Reduced |
| Greenwood Capital Associates LLC | 7,651 | $913.0K | 0.14% | +81+1.1% | Added |
| Summit Global Investments | 7,700 | $919.0K | 0.07% | −3,600−31.9% | Reduced |
| Public Employees Retirement Association of Colorado | 8,105 | $968.0K | 0.00% | 00.0% | Unchanged |
| Russell Investments Group, Ltd. | 8,159 | $971.0K | 0.00% | −4,179−33.9% | Reduced |
| Walleye Capital LLC | 8,247 | $985.0K | 0.03% | +8,247 | New |
| BI Asset Management Fondsmaeglerselskab A/S | 8,433 | $1.01M | 0.04% | 00.0% | Unchanged |
| Manchester Capital Management LLC | 8,573 | $1.02M | 0.14% | −10.0% | Reduced |
| Roundview Capital LLC | 8,862 | $1.06M | 0.12% | 00.0% | Unchanged |
| Avestar Capital, LLC | 8,875 | $1.06M | 0.21% | +8,875 | 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 |
| Baird Financial Group, Inc. | 9,052 | $1.08M | 0.00% | +9,052 | New |
| US Bancorp | 9,239 | $1.10M | 0.00% | +3,812+70.2% | Added |
| Bank of Nova Scotia | 9,543 | $1.14M | 0.00% | −160,457−94.4% | Reduced |
| State of Alaska, Department of Revenue | 9,675 | $1.16M | 0.01% | +9,675 | New |
| Commonwealth Equity Services, LLC | 9,787 | $1.17M | 0.00% | +503+5.4% | Added |
| Teacher Retirement System of Texas | 10,077 | $1.20M | 0.01% | +2,533+33.6% | Added |
| 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 |
| 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 |
| Illinois Municipal Retirement Fund | 10,851 | $1.29M | 0.05% | 00.0% | Unchanged |
| Handelsbanken Fonder AB | 11,100 | $1.32M | 0.01% | 00.0% | Unchanged |
| ETF Managers Group, LLC | 11,417 | $1.37M | 0.03% | +11,417 | New |
| Strategic Wealth Partners, Ltd. | 11,788 | $1.41M | 0.41% | +3,806+47.7% | Added |
| AlphaCrest Capital Management LLC | 12,160 | $1.45M | 0.08% | −296−2.4% | Reduced |
| Engineers Gate Manager LP | 12,716 | $1.52M | 0.09% | +4,492+54.6% | Added |
| Xponance, Inc. | 12,770 | $1.52M | 0.03% | +5,996+88.5% | Added |
| Ensign Peak Advisors, Inc | 12,900 | $1.53M | 0.00% | +12,900 | New |
| Envestnet Asset Management Inc | 12,851 | $1.53M | 0.00% | +1,527+13.5% | Added |
| New Mexico Educational Retirement Board | 13,000 | $1.55M | 0.05% | +13,000 | New |
| Davy Global Fund Management Ltd | 13,090 | $1.56M | 0.24% | 00.0% | Unchanged |
| Seven Eight Capital, LP | 13,514 | $1.61M | 0.16% | +13,514 | New |
| Sectoral Asset Management Inc | 13,750 | $1.64M | 0.14% | −18,350−57.2% | Reduced |
| Mercer Global Advisors Inc | 13,850 | $1.65M | 0.01% | −28−0.2% | Reduced |
| Twin Capital Management Inc | 14,045 | $1.68M | 0.17% | +14,045 | New |
| Metropolitan Life Insurance Co | 14,173 | $1.69M | 0.02% | +10,126+250.2% | Added |
| Guggenheim Capital LLC | 14,247 | $1.70M | 0.01% | +1,086+8.3% | Added |
| D. E. Shaw & Co., Inc. | 14,265 | $1.70M | 0.00% | −929−6.1% | Reduced |
| Cetera Advisor Networks LLC | 14,286 | $1.71M | 0.02% | +3,165+28.5% | Added |
| Banque Pictet & Cie SA | 14,685 | $1.75M | 0.02% | +1,701+13.1% | Added |
| Capital Fund Management S.A. | 15,094 | $1.80M | 0.05% | +15,094 | New |
| Polar Capital Holdings Plc | 15,173 | $1.81M | 0.01% | −3,521−18.8% | Reduced |
| EAM Investors, LLC | 15,622 | $1.86M | 0.31% | +15,622 | New |
| State of Michigan Retirement System | 15,800 | $1.89M | 0.01% | +15,800 | New |
| Marshall Wace, LLP | 15,804 | $1.89M | 0.01% | +15,804 | New |
| Tributary Capital Management, LLC | 15,900 | $1.90M | 0.15% | +15,900 | New |
| Louisiana State Employees Retirement System | 16,100 | $1.92M | 0.05% | +16,100 | New |
| Ameritas Investment Partners, Inc. | 16,696 | $1.99M | 0.07% | +16,696 | New |
| Chartwell Investment Partners, LLC | 16,777 | $2.00M | 0.06% | 00.0% | Unchanged |
| Arizona State Retirement System | 17,062 | $2.04M | 0.02% | +71+0.4% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 17,200 | $2.05M | 0.01% | +17,200 | New |
| Raymond James & Associates | 17,595 | $2.10M | 0.00% | −1,152−6.1% | Reduced |
| Granite Point Capital Management, L.P. | 17,708 | $2.11M | 0.82% | 00.0% | Unchanged |
| Beacon Investment Advisory Services, Inc. | 18,184 | $2.17M | 0.09% | +3,568+24.4% | Added |
| Winton Group Ltd | 18,599 | $2.22M | 0.12% | −1,000−5.1% | Reduced |
| Susquehanna International Group, LLP | 18,647 | $2.23M | 0.00% | −19,893−51.6% | Reduced |
| Thrivent Financial for Lutherans | 19,287 | $2.30M | 0.00% | +19,287 | New |
| Bridge City Capital, LLC | 19,336 | $2.31M | 1.05% | −5,148−21.0% | Reduced |
| Quantitative Investment Management, LLC | 19,605 | $2.34M | 0.21% | +19,605 | New |
| Magnetar Financial LLC | 19,846 | $2.37M | 0.02% | +19,846 | New |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 20,823 | $2.49M | 0.03% | +20,823 | New |