Tandem Diabetes Care, Inc.

Historical 13F Holders

Symbol
TNDM
CUSIP
875372203
All holders as of
Q2 2026
Type
Equity
Class
COM NEW
Reported Value, Excluding Options
Total Filings

13D/G Filers

Investors who own more than 5% of a class must file a Schedule 13D or 13G. Every filing for 875372203 since 12/18/2024, newest first.

Filer % of Class Filed
Voya Financial, Inc. 13G/A Amendment 1 0.2% 8/6/2026
Event 6/30/2026
Voya Financial, Inc. 13G 6.3% 5/5/2026
Event 3/31/2026
Vanguard Capital Management LLC 13G 5.2% 4/30/2026
Event 3/31/2026
Vanguard Portfolio Management LLC 13G 5.9% 4/29/2026
Event 3/31/2026
Vanguard Group Inc 13G/A Amendment 8 0% 3/27/2026
Event 3/13/2026
ArrowMark Colorado Holdings LLC 13G/A Amendment 1 4.3% 2/17/2026
Event 12/31/2025
ArrowMark Colorado Holdings LLC 13G 5.5% 11/13/2025
Event 9/30/2025
Sessa Capital (Master), L.P. 13G
6.7% 5/15/2025
Event 3/31/2025
BlackRock, Inc. 13G/A Amendment 4 15.2% 4/29/2025
Event 3/31/2025

13F Holders by Quarter

Period Filings Shares, Excl. Options Value, Excl. Options
2026 Q3 15 54.5 k $866 k
2026 Q2 292 80.0 M $1.27 B
2026 Q1 288 78.7 M $1.51 B
2025 Q4 287 74.9 M $1.65 B
2025 Q3 272 75.4 M $916 M
2025 Q2 287 81.9 M $1.52 B
2025 Q1 288 73.2 M $1.40 B
2024 Q4 333 72.1 M $2.60 B
2024 Q3 358 73.3 M $3.11 B
2024 Q2 339 74.7 M $3.01 B
2024 Q1 315 77.1 M $2.73 B
2023 Q4 291 72.2 M $2.14 B
2023 Q3 242 69.6 M $1.45 B
2023 Q2 262 67.2 M $1.65 B
2023 Q1 286 68.1 M $2.77 B
2022 Q4 325 66.2 M $2.97 B
2022 Q3 327 63.7 M $3.05 B
2022 Q2 355 62.1 M $3.67 B
2022 Q1 405 60.0 M $6.98 B
2021 Q4 420 60.6 M $9.12 B
2021 Q3 360 61.3 M $7.32 B
2021 Q2 328 59.3 M $5.77 B
2021 Q1 317 57.6 M $5.08 B
2020 Q4 351 59.1 M $5.65 B
2020 Q3 356 54.6 M $6.20 B
2020 Q2 342 64.7 M $5.74 B
2020 Q1 310 57.1 M $3.67 B
2019 Q4 312 55.4 M $3.30 B
2019 Q3 303 50.0 M $2.95 B
2019 Q2 302 47.7 M $3.08 B
2019 Q1 316 47.0 M $2.99 B
2018 Q4 229 48.4 M $1.84 B
2018 Q3 208 42.2 M $1.81 B
2018 Q2 127 33.5 M $738 M
2018 Q1 77 21.5 M $106 M
2017 Q4 43 1.66 M $3.92 M
2017 Q3 4 8.18 M $5.97 M
2016 Q1 2 169 $10.2 k
2015 Q4 1 19.0 $224.00
2015 Q3 1 19.0 $167.00
2015 Q2 1 19.0 $206.00
2015 Q1 1 19.0 $240.00