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 Shares Held, Excluding Options
Total Filers

13D/G Filers

Each filer's latest filing for 875372203 since 12/18/2024, largest first.

Filer % of Class Filed
BlackRock, Inc. 13G/A 15.2% 4/29/2025
Event 3/31/2025
Sessa Capital (Master), L.P. 13G
6.7% 5/15/2025
Event 3/31/2025
Vanguard Portfolio Management LLC 13G 5.9% 4/29/2026
Event 3/31/2026
Vanguard Capital Management LLC 13G 5.2% 4/30/2026
Event 3/31/2026
Under 5%, checked the "5 percent or less" box, or amended by a later filing (3)
ArrowMark Colorado Holdings LLC 13G/A 4.3% 2/17/2026
Event 12/31/2025
Voya Financial, Inc. 13G/A 0.2% 8/6/2026
Event 6/30/2026
Vanguard Group Inc 13G/A 0% 3/27/2026
Event 3/13/2026

13F Holders by Quarter

Period Filers Shares, Excl. Options Value, Excl. Options
2026 Q3 87 4.77 M $78.6 M
2026 Q2 277 80.0 M $1.27 B
2026 Q1 278 78.7 M $1.51 B
2025 Q4 272 74.9 M $1.65 B
2025 Q3 258 75.5 M $916 M
2025 Q2 273 81.9 M $1.52 B
2025 Q1 278 73.2 M $1.40 B
2024 Q4 317 72.1 M $2.60 B
2024 Q3 335 73.3 M $3.11 B
2024 Q2 319 74.7 M $3.01 B
2024 Q1 294 77.1 M $2.73 B
2023 Q4 273 72.2 M $2.14 B
2023 Q3 229 69.6 M $1.45 B
2023 Q2 248 67.2 M $1.65 B
2023 Q1 277 76.3 M $3.10 B
2022 Q4 300 66.2 M $2.97 B
2022 Q3 304 63.7 M $3.05 B
2022 Q2 335 62.1 M $3.67 B
2022 Q1 381 60.0 M $6.98 B
2021 Q4 396 60.6 M $9.12 B
2021 Q3 345 61.3 M $7.32 B
2021 Q2 306 59.3 M $5.77 B
2021 Q1 296 57.6 M $5.08 B
2020 Q4 318 59.1 M $5.65 B
2020 Q3 326 54.6 M $6.20 B
2020 Q2 307 64.7 M $5.74 B
2020 Q1 281 57.1 M $3.67 B
2019 Q4 289 55.4 M $3.30 B
2019 Q3 279 50.0 M $2.95 B
2019 Q2 268 47.7 M $3.08 B
2019 Q1 270 47.0 M $2.99 B
2018 Q4 204 48.4 M $1.84 B
2018 Q3 187 42.2 M $1.81 B
2018 Q2 118 33.5 M $738 M
2018 Q1 76 21.5 M $106 M
2017 Q4 42 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