Citigroup
TNDM icon

Citigroup’s Tandem Diabetes Care TNDM Stock Holding History

Citigroup’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
2021
Q1 		– Sell
-16,900
Closed -$1.62M – 7356
2020
Q4 		$1.62M Buy
16,900
+1,000
+6% +$103K ﹤0.01% 3064
2020
Q3 		$1.8M Sell
15,900
-18,100
-53% -$1.9M ﹤0.01% 2747
2020
Q2 		$3.36M Buy
34,000
+13,900
+69% +$1.11M ﹤0.01% 2239
2020
Q1 		$1.29M Sell
20,100
-31,800
-61% -$2.23M ﹤0.01% 2911
2019
Q4 		$3.09M Buy
51,900
+8,400
+19% +$518K ﹤0.01% 2502
2019
Q3 		$2.57M Sell
43,500
-3,500
-7% -$223K ﹤0.01% 2593
2019
Q2 		$3.03M Buy
47,000
+16,700
+55% +$1.08M ﹤0.01% 2390
2019
Q1 		$1.92M Buy
30,300
+15,100
+99% +$793K ﹤0.01% 2691
2018
Q4 		$577K Buy
15,200
+8,400
+124% +$297K ﹤0.01% 3974
2018
Q3 		$291K Buy
+6,800
New +$237K ﹤0.01% 4875

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
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
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

Citigroup's TNDM Position: Q1 2026 in Review

Citigroup increased its Tandem Diabetes Care (TNDM) stake by 272% in Q1 2026, buying an estimated $1.09M and bringing the position to 68,346 shares worth $1.31M. The position accounts for ﹤0.01% of the portfolio, ranked #2941.

Citigroup first reported a position in TNDM in Q4 2013 and has held it in 49 quarters since. The position peaked at $10.3M in Q1 2021. 272 funds tracked by Wall St. Rank hold TNDM as of Q1 2026.

  • Citigroup held 68,346 shares of Tandem Diabetes Care worth $1.31M as of Q1 2026.
  • Citigroup bought 49,978 Tandem Diabetes Care shares in Q1 2026, an estimated $1.09M.
  • Tandem Diabetes Care made up ﹤0.01% of Citigroup's portfolio in Q1 2026, its #2941 holding.
  • Citigroup first reported a position in Tandem Diabetes Care in Q4 2013 and has held it in 49 quarters since.
  • Citigroup's Tandem Diabetes Care position peaked at $10.3M in Q1 2021.
  • 272 funds tracked by Wall St. Rank held Tandem Diabetes Care as of Q1 2026.

Based on Citigroup's 13F filing for Q1 2026, filed 11 May 2026.