ArrowMark Colorado Holdings’s Tandem Diabetes Care TNDM Stock Holding History

ArrowMark Colorado Holdings’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	$19.6M	Sell	1,299,586 -1,804,023	-58%	-$31.5M	0.82%	22
2026 Q1	$59.5M	Buy	3,103,609 +213,918	+7%	+$4.65M	1.58%	11
2025 Q4	$63.5M	Sell	2,889,691 -801,507	-22%	-$14.5M	1.4%	8
2025 Q3	$44.8M	Buy	3,691,198 +991,649	+37%	+$13.4M	0.83%	40
2025 Q2	$50.3M	Sell	2,699,549 -16,783	-0.6%	-$332K	0.91%	35
2025 Q1	$52M	Sell	2,716,332 -7,383	-0.3%	-$216K	0.84%	44
2024 Q4	$98.1M	Buy	2,723,715 +337,026	+14%	+$11.4M	1.32%	23
2024 Q3	$101M	Sell	2,386,689 -118,162	-5%	-$5.01M	1.3%	22
2024 Q2	$101M	Sell	2,504,851 -429,328	-15%	-$17.9M	1.2%	22
2024 Q1	$104M	Sell	2,934,179 -824	-0%	-$22.1K	1.17%	23
2023 Q4	$86.8M	Buy	2,935,003 +1,303,459	+80%	+$27M	0.96%	33
2023 Q3	$33.9M	Buy	+1,631,544	New	+$44.8M	0.41%	71

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

ArrowMark Colorado Holdings's TNDM Position: Q2 2026 in Review

ArrowMark Colorado Holdings reduced its Tandem Diabetes Care (TNDM) stake by 58% in Q2 2026, selling an estimated $31.5M and leaving 1,299,586 shares worth $19.6M. The position accounts for 0.82% of the portfolio, ranked #22.

ArrowMark Colorado Holdings first reported a position in TNDM in Q3 2023 and has held it in 12 quarters since. The position peaked at $104M in Q1 2024. 273 funds tracked by Wall St. Rank hold TNDM as of Q2 2026.

ArrowMark Colorado Holdings held 1,299,586 shares of Tandem Diabetes Care worth $19.6M as of Q2 2026.
ArrowMark Colorado Holdings sold 1,804,023 Tandem Diabetes Care shares in Q2 2026, an estimated $31.5M.
Tandem Diabetes Care made up 0.82% of ArrowMark Colorado Holdings's portfolio in Q2 2026, its #22 holding.
ArrowMark Colorado Holdings first reported a position in Tandem Diabetes Care in Q3 2023 and has held it in 12 quarters since.
ArrowMark Colorado Holdings's Tandem Diabetes Care position peaked at $104M in Q1 2024.
273 funds tracked by Wall St. Rank held Tandem Diabetes Care as of Q2 2026.

Based on ArrowMark Colorado Holdings's 13F filing for Q2 2026, filed 13 Aug 2026.