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GW&K Investment Management’s Tandem Diabetes Care TNDM Stock Holding History

GW&K Investment Management’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 		$51.5M Buy
2,689,106
+13,949
+0.5% +$303K 0.45% 71
2025
Q4 		$58.8M Sell
2,675,157
-46,492
-2% -$839K 0.51% 59
2025
Q3 		$33M Sell
2,721,649
-168,481
-6% -$2.28M 0.29% 133
2025
Q2 		$53.9M Buy
2,890,130
+26,143
+0.9% +$518K 0.48% 67
2025
Q1 		$54.9M Buy
2,863,987
+740,499
+35% +$21.7M 0.51% 62
2024
Q4 		$76.5M Buy
2,123,488
+323,674
+18% +$10.9M 0.65% 37
2024
Q3 		$76.3M Buy
1,799,814
+456,703
+34% +$19.4M 0.65% 33
2024
Q2 		$54.1M Buy
1,343,111
+37,202
+3% +$1.55M 0.49% 72
2024
Q1 		$46.2M Buy
1,305,909
+79,151
+6% +$2.12M 0.41% 96
2023
Q4 		$36.3M Buy
+1,226,758
New +$25.4M 0.34% 125

Other funds holding TNDM

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
SC
Sessa Capital New York $5.51B AUM 47.23% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
ACH
ArrowMark Colorado Holdings Denver, Colorado $3.76B AUM 21.77% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
DCM
Driehaus Capital Management Chicago, Illinois $13.6B AUM 173.98% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return

GW&K Investment Management's TNDM Position: Q1 2026 in Review

GW&K Investment Management increased its Tandem Diabetes Care (TNDM) stake by 0.52% in Q1 2026, buying an estimated $303K and bringing the position to 2,689,106 shares worth $51.5M. The position accounts for 0.45% of the portfolio, ranked #71.

GW&K Investment Management first reported a position in TNDM in Q4 2023 and has held it in 10 quarters since. The position peaked at $76.5M in Q4 2024. 272 funds tracked by Wall St. Rank hold TNDM as of Q1 2026.

  • GW&K Investment Management held 2,689,106 shares of Tandem Diabetes Care worth $51.5M as of Q1 2026.
  • GW&K Investment Management bought 13,949 Tandem Diabetes Care shares in Q1 2026, an estimated $303K.
  • Tandem Diabetes Care made up 0.45% of GW&K Investment Management's portfolio in Q1 2026, its #71 holding.
  • GW&K Investment Management first reported a position in Tandem Diabetes Care in Q4 2023 and has held it in 10 quarters since.
  • GW&K Investment Management's Tandem Diabetes Care position peaked at $76.5M in Q4 2024.
  • 272 funds tracked by Wall St. Rank held Tandem Diabetes Care as of Q1 2026.

Based on GW&K Investment Management's 13F filing for Q1 2026, filed 13 May 2026.