TANDEM DIABETES CARE INC - Common Stock, par value $0.001 per share (TNDM)

Historical Holders from Q1 2016 to Q3 2025

Symbol
TNDM on Nasdaq
CUSIP
875372203
Type / Class
Equity / Common Stock, par value $0.001 per share
Shares outstanding
67.6M
All holders as of September 30, 2025
Q3 2025
Total 13F shares, excl. options
74.9M
Holdings value
$909M
% of all portfolios
0.002%
Grand Portfolio weight change
0%
Number of holders
248
Number of buys
112
Number of sells
-153
Average Value change %
0%
Average buys %
+0.001%
Average sells %
-0.001%
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of TANDEM DIABETES CARE INC - Common Stock, par value $0.001 per share (TNDM)

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
BlackRock, Inc. 15.2% $177M 10.1M BlackRock, Inc. Mar 31, 2025
Sessa Capital (Master), L.P. 6.71% $78M 4.47M Sessa Capital (Master), L.P. Mar 31, 2025
ArrowMark Colorado Holdings LLC 5.46% $44.8M 3.69M ArrowMark Colorado Holdings, LLC Sep 30, 2025

Institutional Holders of TANDEM DIABETES CARE INC - Common Stock, par value $0.001 per share (TNDM)

Period Reported Shares, Excl. Options Value, Excl. Options Change Price Investors
2025 Q3 74.9M $909M -$139M $12.14 248
2025 Q2 81M $1.51B +$147M $18.64 269
2025 Q1 73M $1.4B -$74.3M $19.16 271
2024 Q4 72.1M $2.6B -$54.1M $36.02 310
2024 Q3 73M $3.1B -$23.2M $42.41 328
2024 Q2 73.6M $2.96B -$12.2M $40.29 316
2024 Q1 74.1M $2.62B +$151M $35.41 289
2023 Q4 70.8M $2.09B +$49.5M $29.58 265
2023 Q3 69.4M $1.44B +$34.6M $20.77 224
2023 Q2 67.1M $1.65B -$59.2M $24.54 241
2023 Q1 68.1M $2.77B +$145M $40.61 272
2022 Q4 64.3M $2.89B +$85.8M $44.95 293
2022 Q3 62.7M $3B +$15.4M $47.85 281
2022 Q2 61.4M $3.64B -$76.7M $59.19 321
2022 Q1 59.5M $6.92B -$138M $116.29 366
2021 Q4 60.4M $9.09B -$2.09M $150.52 381
2021 Q3 61.3M $7.32B +$275M $119.38 335
2021 Q2 59M $5.75B +$205M $97.40 295
2021 Q1 57.6M $5.08B -$46.9M $88.25 285
2020 Q4 58.5M $5.59B +$260M $95.68 300
2020 Q3 54.6M $6.2B -$74.5M $113.50 319
2020 Q2 55.3M $5.47B +$30.5M $98.92 300
2020 Q1 55.9M $3.6B +$179M $64.35 272
2019 Q4 54.3M $3.24B +$216M $59.61 278
2019 Q3 49.6M $2.92B +$150M $58.98 265
2019 Q2 47M $3.03B +$32.4M $64.52 260
2019 Q1 46.9M $2.98B -$43M $63.50 261
2018 Q4 47.7M $1.81B +$238M $37.97 200
2018 Q3 41.3M $1.77B +$364M $42.84 180
2018 Q2 33.4M $735M +$323M $22.02 116
2018 Q1 21.3M $106M +$86.9M $4.96 73
2017 Q4 1.66M $3.91M -$15.4M $2.36 29
2017 Q3 8.18M $5.97M +$5.97M $0.73 4
2016 Q2 0 $0 -$10K 0
2016 Q1 150 $10K $0 $66.67 1