Flagship Harbor Advisors’s Tandem Diabetes Care TNDM Stock Holding History

Flagship Harbor 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 Q1	–	Sell	-49	Closed	-$1.08K	–	2059
2025 Q4	$1.08K	Buy	+49	New	+$884	﹤0.01%	1931
2022 Q1	–	Sell	-1,683	Closed	-$253K	–	686
2021 Q4	$253K	Buy	+1,683	New	+$227K	0.02%	551
2020 Q4	–	Sell	-868	Closed	-$98K	–	1649
2020 Q3	$98K	Hold	868	–	–	0.01%	664
2020 Q2	$85K	Hold	868	–	–	0.01%	696
2020 Q1	$56K	Sell	868 -689	-44%	-$48.3K	0.01%	728
2019 Q4	$93K	Hold	1,557	–	–	0.02%	628
2019 Q3	$91K	Sell	1,557 -957	-38%	-$61.1K	0.02%	613
2019 Q2	$162K	Buy	2,514 +98	+4%	+$6.33K	0.03%	452
2019 Q1	$153K	Buy	+2,416	New	+$127K	0.03%	471

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

ACH

ArrowMark Colorado Holdings Denver, Colorado $2.4B AUM 42.85% 1-Year Est. Return

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 Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return

DCM

Driehaus Capital Management Chicago, Illinois $17.3B AUM 211.34% 1-Year Est. Return

Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return

Citadel Advisors Miami, Florida $875B AUM 40.89% 1-Year Est. Return

Flagship Harbor Advisors's TNDM Position: Q1 2026 in Review

Flagship Harbor Advisors sold out of Tandem Diabetes Care (TNDM) in Q1 2026, closing a stake of 49 shares — an estimated $1.08K sold.

Flagship Harbor Advisors first reported a position in TNDM in Q1 2019 and held it in 9 quarters. The position peaked at $253K in Q4 2021. 274 funds tracked by Wall St. Rank hold TNDM as of Q1 2026.

Flagship Harbor Advisors reported no remaining Tandem Diabetes Care position as of Q1 2026 after selling out during the quarter.
Flagship Harbor Advisors sold 49 Tandem Diabetes Care shares in Q1 2026, an estimated $1.08K.
Flagship Harbor Advisors first reported a position in Tandem Diabetes Care in Q1 2019 and held it in 9 quarters.
Flagship Harbor Advisors's Tandem Diabetes Care position peaked at $253K in Q4 2021.
274 funds tracked by Wall St. Rank held Tandem Diabetes Care as of Q1 2026.

Based on Flagship Harbor Advisors's 13F filing for Q1 2026, filed 28 Apr 2026.