Wells Fargo
TNDM icon

Wells Fargo’s Tandem Diabetes Care TNDM Stock Holding History

Wells Fargo’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
Q2 		– Sell
-100,000
Closed -$1.92M – 7369
2025
Q1 		$1.92M Buy
+100,000
New +$2.93M ﹤0.01% 3194
2021
Q1 		– Sell
-16,500
Closed -$2K – 7373
2020
Q4 		$2K Buy
+16,500
New +$1.7M ﹤0.01% 6286
2020
Q3 		– Sell
-12,400
Closed -$60K – 6900
2020
Q2 		$60K Buy
+12,400
New +$989K ﹤0.01% 5434

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

Wells Fargo's TNDM Position: Q1 2026 in Review

Wells Fargo reduced its Tandem Diabetes Care (TNDM) stake by 63% in Q1 2026, selling an estimated $1.15M and leaving 31,530 shares worth $604K. The position accounts for ﹤0.01% of the portfolio, ranked #4043.

Wells Fargo first reported a position in TNDM in Q4 2013 and has held it in 50 quarters since. The position peaked at $30.4M in Q3 2020. 272 funds tracked by Wall St. Rank hold TNDM as of Q1 2026.

  • Wells Fargo held 31,530 shares of Tandem Diabetes Care worth $604K as of Q1 2026.
  • Wells Fargo sold 52,881 Tandem Diabetes Care shares in Q1 2026, an estimated $1.15M.
  • Tandem Diabetes Care made up ﹤0.01% of Wells Fargo's portfolio in Q1 2026, its #4043 holding.
  • Wells Fargo first reported a position in Tandem Diabetes Care in Q4 2013 and has held it in 50 quarters since.
  • Wells Fargo's Tandem Diabetes Care position peaked at $30.4M in Q3 2020.
  • 272 funds tracked by Wall St. Rank held Tandem Diabetes Care as of Q1 2026.

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