Rhenman & Partners Asset Management’s Tandem Diabetes Care TNDM Stock Holding History

Rhenman & Partners Asset Management’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	$302K	Buy	+20,000	New	+$349K	0.03%	98
2017 Q3	–	Sell	-23,400	Closed	-$187K	–	107
2017 Q2	$187K	Hold	23,400	–	–	0.03%	104
2017 Q1	$281K	Hold	23,400	–	–	0.04%	99
2016 Q4	$503K	Hold	23,400	–	–	0.1%	87
2016 Q3	$1.79M	Buy	23,400 +2,500	+12%	+$182K	0.28%	82
2016 Q2	$1.58M	Hold	20,900	–	–	0.28%	82
2016 Q1	$1.82M	Hold	20,900	–	–	0.36%	77
2015 Q4	$2.47M	Hold	20,900	–	–	0.37%	79
2015 Q3	$1.84M	Hold	20,900	–	–	0.29%	81
2015 Q2	$2.27M	Hold	20,900	–	–	0.27%	91
2015 Q1	$2.64M	Buy	20,900 +3,000	+17%	+$390K	0.44%	79
2014 Q4	$2.27M	Buy	+17,900	New	+$2.48M	0.66%	66

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

Rhenman & Partners Asset Management's TNDM Position: Q2 2026 in Review

Rhenman & Partners Asset Management opened a new position in Tandem Diabetes Care (TNDM) in Q2 2026: 20,000 shares worth $302K. The stake represents 0.03% of the portfolio and ranks #98 among its holdings. This is a return to the name: Rhenman & Partners Asset Management previously reported a position in TNDM as recently as Q2 2017.

Rhenman & Partners Asset Management first reported a position in TNDM in Q4 2014 and has held it in 12 quarters since. The position peaked at $2.64M in Q1 2015. 274 funds tracked by Wall St. Rank hold TNDM as of Q2 2026.

Rhenman & Partners Asset Management held 20,000 shares of Tandem Diabetes Care worth $302K as of Q2 2026.
Tandem Diabetes Care was a new Rhenman & Partners Asset Management position in Q2 2026.
Tandem Diabetes Care made up 0.03% of Rhenman & Partners Asset Management's portfolio in Q2 2026, its #98 holding.
Rhenman & Partners Asset Management first reported a position in Tandem Diabetes Care in Q4 2014 and has held it in 12 quarters since.
Rhenman & Partners Asset Management's Tandem Diabetes Care position peaked at $2.64M in Q1 2015.
274 funds tracked by Wall St. Rank held Tandem Diabetes Care as of Q2 2026.

Based on Rhenman & Partners Asset Management's 13F filing for Q2 2026, filed 13 Aug 2026.