Two Sigma Investments’s Tandem Diabetes Care TNDM Stock Holding History

Two Sigma Investments’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
2022 Q1	–	Sell	-8,900	Closed	-$1.34M	–	4266
2021 Q4	$1.34M	Buy	8,900 +4,900	+123%	+$661K	﹤0.01%	2296
2021 Q3	$478K	Sell	4,000 -10,000	-71%	-$1.1M	﹤0.01%	3307
2021 Q2	$1.36M	Buy	14,000 +2,100	+18%	+$187K	﹤0.01%	2205
2021 Q1	$1.05M	Sell	11,900 -25,800	-68%	-$2.4M	﹤0.01%	2267
2020 Q4	$3.61M	Buy	37,700 +1,600	+4%	+$165K	0.01%	1119
2020 Q3	$4.1M	Buy	36,100 +19,800	+121%	+$2.08M	0.01%	891
2020 Q2	$1.61M	Sell	16,300 -10,600	-39%	-$846K	0.01%	1210
2020 Q1	$1.73M	Buy	26,900 +16,900	+169%	+$1.18M	0.01%	1046
2019 Q4	$596K	Sell	10,000 -4,100	-29%	-$253K	﹤0.01%	2643
2019 Q3	$832K	Sell	14,100 -11,600	-45%	-$740K	﹤0.01%	2131
2019 Q2	$1.66M	Buy	+25,700	New	+$1.66M	0.01%	1576
2019 Q1	–	Sell	-17,000	Closed	-$645K	–	3472
2018 Q4	$645K	Buy	+17,000	New	+$600K	﹤0.01%	1943

Other funds holding TNDM

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

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 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 New York $871B AUM 31.28% 1-Year Est. Return

Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return

Two Sigma Investments's TNDM Position: Q1 2026 in Review

Two Sigma Investments increased its Tandem Diabetes Care (TNDM) stake by 55% in Q1 2026, buying an estimated $14.4M and bringing the position to 1,864,194 shares worth $35.7M. The position accounts for 0.03% of the portfolio, ranked #645.

Two Sigma Investments first reported a position in TNDM in Q1 2014 and has held it in 29 quarters since. The position peaked at $56.7M in Q1 2019. 272 funds tracked by Wall St. Rank hold TNDM as of Q1 2026.

Two Sigma Investments held 1,864,194 shares of Tandem Diabetes Care worth $35.7M as of Q1 2026.
Two Sigma Investments bought 662,667 Tandem Diabetes Care shares in Q1 2026, an estimated $14.4M.
Tandem Diabetes Care made up 0.03% of Two Sigma Investments's portfolio in Q1 2026, its #645 holding.
Two Sigma Investments first reported a position in Tandem Diabetes Care in Q1 2014 and has held it in 29 quarters since.
Two Sigma Investments's Tandem Diabetes Care position peaked at $56.7M in Q1 2019.
272 funds tracked by Wall St. Rank held Tandem Diabetes Care as of Q1 2026.

Based on Two Sigma Investments's 13F filing for Q1 2026, filed 15 May 2026.