Summit Trail Advisors’s Tandem Diabetes Care TNDM Stock Holding History

Summit Trail Advisors’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 Q2	$903K	Buy	59,862 +22,119	+59%	+$386K	0.01%	1026
2026 Q1	$724K	Buy	37,743 +3,214	+9%	+$69.8K	0.01%	1043
2025 Q4	$759K	Sell	34,529 -66,781	-66%	-$1.21M	0.01%	950
2025 Q3	$1.23M	Buy	101,310 +76,430	+307%	+$1.03M	0.02%	716
2025 Q2	$464K	Buy	+24,880	New	+$493K	0.01%	758
2024 Q4	–	Sell	-7,054	Closed	-$299K	–	729
2024 Q3	$299K	Buy	+7,054	New	+$299K	0.01%	548

Other funds holding TNDM

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Sessa Capital New York $5.98B AUM 99.85% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

FLAM

First Light Asset Management Edina, Minnesota $1.65B AUM 203.21% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

GKIM

GW&K Investment Management Boston, Massachusetts $12.8B AUM 48.82% 1-Year Est. Return

Jennison Associates New York $167B AUM 44.17% 1-Year Est. Return

PIM

Paradice Investment Management Denver, Colorado $627M AUM 43.41% 1-Year Est. Return

Jacobs Levy Equity Management Florham Park, New Jersey $27.8B AUM 46.46% 1-Year Est. Return

Summit Trail Advisors's TNDM Position: Q2 2026 in Review

Summit Trail Advisors increased its Tandem Diabetes Care (TNDM) stake by 59% in Q2 2026, buying an estimated $386K and bringing the position to 59,862 shares worth $903K. The position accounts for 0.01% of the portfolio, ranked #1026.

Summit Trail Advisors first reported a position in TNDM in Q3 2024 and has held it in 6 quarters since. The position peaked at $1.23M in Q3 2025. 274 funds tracked by Wall St. Rank hold TNDM as of Q2 2026.

Summit Trail Advisors held 59,862 shares of Tandem Diabetes Care worth $903K as of Q2 2026.
Summit Trail Advisors bought 22,119 Tandem Diabetes Care shares in Q2 2026, an estimated $386K.
Tandem Diabetes Care made up 0.01% of Summit Trail Advisors's portfolio in Q2 2026, its #1026 holding.
Summit Trail Advisors first reported a position in Tandem Diabetes Care in Q3 2024 and has held it in 6 quarters since.
Summit Trail Advisors's Tandem Diabetes Care position peaked at $1.23M in Q3 2025.
274 funds tracked by Wall St. Rank held Tandem Diabetes Care as of Q2 2026.

Based on Summit Trail Advisors's 13F filing for Q2 2026, filed 11 Aug 2026.