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Cubist Systematic Strategies’s Tandem Diabetes Care TNDM Stock Holding History

Cubist Systematic Strategies’s Portfolio TNDM Stock Details TNDM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q3 		$5.33M Buy
+439,158
New +$5.94M 0.03% 926
2025
Q1 		– Sell
-93,987
Closed -$3.39M – 3535
2024
Q4 		$3.39M Sell
93,987
-226,462
-71% -$7.66M 0.02% 1051
2024
Q3 		$13.6M Buy
+320,449
New +$13.6M 0.08% 332
2024
Q2 		– Sell
-339,918
Closed -$14.2M – 4008
2024
Q1 		$12M Buy
+339,918
New +$9.11M 0.07% 402
2023
Q4 		– Sell
-108,056
Closed -$2.24M – 4117
2023
Q3 		$2.24M Sell
108,056
-273,106
-72% -$7.5M 0.02% 1292
2023
Q2 		$9.35M Buy
381,162
+219,373
+136% +$7.06M 0.06% 468
2023
Q1 		$6.57M Sell
161,789
-22,807
-12% -$944K 0.04% 734
2022
Q4 		$8.3M Sell
184,596
-482
-0.3% -$21.8K 0.05% 615
2022
Q3 		$8.86M Sell
185,078
-151,392
-45% -$8.3M 0.05% 573
2022
Q2 		$19.9M Buy
336,470
+241,193
+253% +$19.8M 0.12% 139
2022
Q1 		$11.1M Buy
95,277
+14,754
+18% +$1.72M 0.09% 252
2021
Q4 		$12.1M Sell
80,523
-119
-0.1% -$16.1K 0.12% 161
2021
Q3 		$9.63M Buy
80,642
+5,204
+7% +$573K 0.12% 197
2021
Q2 		$7.35M Buy
75,438
+16,588
+28% +$1.48M 0.08% 338
2021
Q1 		$5.19M Sell
58,850
-9,450
-14% -$878K 0.07% 441
2020
Q4 		$6.54M Buy
68,300
+14,648
+27% +$1.51M 0.09% 315
2020
Q3 		$6.09M Buy
53,652
+28,342
+112% +$2.98M 0.09% 318
2020
Q2 		$2.5M Buy
25,310
+13,509
+114% +$1.08M 0.04% 658
2020
Q1 		$759K Buy
11,801
+4,050
+52% +$284K 0.02% 1002
2019
Q4 		$462K Sell
7,751
-14,049
-64% -$866K 0.01% 1592
2019
Q3 		$1.29M Buy
21,800
+5,102
+31% +$326K 0.03% 862
2019
Q2 		$1.08M Buy
16,698
+11,352
+212% +$733K 0.02% 1001
2019
Q1 		$339K Buy
5,346
+3,215
+151% +$169K 0.01% 1435
2018
Q4 		$81K Sell
2,131
-9,966
-82% -$352K ﹤0.01% 1796
2018
Q3 		$518K Buy
12,097
+10,887
+900% +$380K 0.03% 807
2018
Q2 		$27K Buy
+1,210
New +$14.9K ﹤0.01% 1696
2016
Q3 		– Sell
-383
Closed -$29K – 1877
2016
Q2 		$29K Buy
+383
New +$30.8K ﹤0.01% 1622
2016
Q1 		– Sell
-29
Closed -$3K – 1837
2015
Q4 		$3K Buy
+29
New +$2.88K ﹤0.01% 1723
2015
Q2 		– Sell
-90
Closed -$11K – 2045
2015
Q1 		$11K Buy
+90
New +$11.7K ﹤0.01% 1831

Other funds holding TNDM

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
SC
Sessa Capital New York $5.51B AUM 47.23% 1-Year Est. Return
ACH
ArrowMark Colorado Holdings Denver, Colorado $3.76B AUM 21.77% 1-Year Est. Return
GKIM
GW&K Investment Management Boston, Massachusetts $11.3B AUM 31.98% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
HRCM
Hood River Capital Management Palm Beach Gardens, Florida $9.98B AUM 145.42% 1-Year Est. Return
PIM
Paradice Investment Management Denver, Colorado $532M AUM 29.6% 1-Year Est. Return
FGP
Freestone Grove Partners San Francisco, California $14.2B AUM 24.58% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Cubist Systematic Strategies's TNDM Position: Q3 2025 in Review

Cubist Systematic Strategies opened a new position in Tandem Diabetes Care (TNDM) in Q3 2025: 439,158 shares worth $5.33M. The stake represents 0.03% of the portfolio and ranks #926 among its holdings. This is a return to the name: Cubist Systematic Strategies previously reported a position in TNDM as recently as Q4 2024.

Cubist Systematic Strategies first reported a position in TNDM in Q1 2015 and has held it in 29 quarters since. The position peaked at $19.9M in Q2 2022. 255 funds tracked by Wall St. Rank hold TNDM as of Q3 2025.

  • Cubist Systematic Strategies held 439,158 shares of Tandem Diabetes Care worth $5.33M as of Q3 2025.
  • Tandem Diabetes Care was a new Cubist Systematic Strategies position in Q3 2025.
  • Tandem Diabetes Care made up 0.03% of Cubist Systematic Strategies's portfolio in Q3 2025, its #926 holding.
  • Cubist Systematic Strategies first reported a position in Tandem Diabetes Care in Q1 2015 and has held it in 29 quarters since.
  • Cubist Systematic Strategies's Tandem Diabetes Care position peaked at $19.9M in Q2 2022.
  • 255 funds tracked by Wall St. Rank held Tandem Diabetes Care as of Q3 2025.

Based on Cubist Systematic Strategies's 13F filing for Q3 2025, filed 14 Nov 2025.