Janus Henderson Group
TNDM icon

Janus Henderson Group’s Tandem Diabetes Care TNDM Stock Holding History

Janus Henderson Group’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
2026
Q1 		$571K Hold
29,811
– – ﹤0.01% 1953
2025
Q4 		$655K Hold
29,811
– – ﹤0.01% 1892
2025
Q3 		$362K Hold
29,811
– – ﹤0.01% 2129
2025
Q2 		$556K Hold
29,811
– – ﹤0.01% 1894
2025
Q1 		$575K Hold
29,811
– – ﹤0.01% 1887
2024
Q4 		$1.07M Sell
29,811
-883,730
-97% -$29.9M ﹤0.01% 1653
2024
Q3 		$38.7M Sell
913,541
-536,634
-37% -$22.8M 0.02% 437
2024
Q2 		$58.4M Sell
1,450,175
-750,622
-34% -$31.3M 0.03% 350
2024
Q1 		$77.9M Sell
2,200,797
-376,945
-15% -$10.1M 0.04% 300
2023
Q4 		$76.2M Sell
2,577,742
-93,489
-3% -$1.94M 0.05% 297
2023
Q3 		$55.5M Buy
2,671,231
+586,832
+28% +$16.1M 0.04% 343
2023
Q2 		$51.2M Buy
2,084,399
+790,155
+61% +$25.4M 0.03% 385
2023
Q1 		$52.6M Buy
1,294,244
+828,534
+178% +$34.3M 0.03% 368
2022
Q4 		$20.9M Buy
465,710
+6,993
+2% +$317K 0.02% 564
2022
Q3 		$21.9M Buy
458,717
+147,416
+47% +$8.08M 0.02% 534
2022
Q2 		$18.4M Sell
311,301
-48,554
-13% -$3.99M 0.01% 581
2022
Q1 		$41.8M Sell
359,855
-289,472
-45% -$33.8M 0.02% 549
2021
Q4 		$97.7M Sell
649,327
-197,591
-23% -$26.7M 0.04% 362
2021
Q3 		$101M Buy
846,918
+15,756
+2% +$1.74M 0.04% 362
2021
Q2 		$81M Buy
+831,162
New +$74.1M 0.03% 431
2020
Q1 		– Sell
-7,330
Closed -$437K – 1414
2019
Q4 		$437K Buy
7,330
+66
+0.9% +$4.07K ﹤0.01% 1299
2019
Q3 		$428K Sell
7,264
-78
-1% -$4.98K ﹤0.01% 1297
2019
Q2 		$474K Sell
7,342
-1,840
-20% -$119K ﹤0.01% 1273
2019
Q1 		$583K Buy
9,182
+3,473
+61% +$182K ﹤0.01% 1228
2018
Q4 		$217K Sell
5,709
-1,266
-18% -$44.7K ﹤0.01% 1310
2018
Q3 		$299K Buy
+6,975
New +$244K ﹤0.01% 1383

Other funds holding TNDM

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
SC
Sessa Capital New York $5.98B AUM 99.85% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
ACH
ArrowMark Colorado Holdings Denver, Colorado $2.4B AUM 42.85% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
GKIM
GW&K Investment Management Boston, Massachusetts $12.8B AUM 48.82% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
DCM
Driehaus Capital Management Chicago, Illinois $17.3B AUM 211.34% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $875B AUM 40.89% 1-Year Est. Return

Janus Henderson Group's TNDM Position: Q1 2026 in Review

Janus Henderson Group held its Tandem Diabetes Care (TNDM) position steady in Q1 2026 at 29,811 shares worth $571K. The position accounts for ﹤0.01% of the portfolio, ranked #1953.

Janus Henderson Group first reported a position in TNDM in Q3 2018 and has held it in 26 quarters since. The position peaked at $101M in Q3 2021. 273 funds tracked by Wall St. Rank hold TNDM as of Q1 2026.

  • Janus Henderson Group held 29,811 shares of Tandem Diabetes Care worth $571K as of Q1 2026.
  • Janus Henderson Group left its Tandem Diabetes Care share count unchanged in Q1 2026.
  • Tandem Diabetes Care made up ﹤0.01% of Janus Henderson Group's portfolio in Q1 2026, its #1953 holding.
  • Janus Henderson Group first reported a position in Tandem Diabetes Care in Q3 2018 and has held it in 26 quarters since.
  • Janus Henderson Group's Tandem Diabetes Care position peaked at $101M in Q3 2021.
  • 273 funds tracked by Wall St. Rank held Tandem Diabetes Care as of Q1 2026.

Based on Janus Henderson Group's 13F filing for Q1 2026, filed 15 May 2026.