Gabelli Funds’s Tandem Diabetes Care TNDM Stock Holding History

Gabelli Funds’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 Q3	$2.09M	Buy	128,000 +25,000	+24%	+$469K	0.01%	745
2026 Q2	$1.55M	Buy	103,000 +78,000	+312%	+$1.36M	0.01%	818
2026 Q1	$479K	Buy	+25,000	New	+$543K	﹤0.01%	1046
2023 Q3	–	Sell	-11,000	Closed	-$270K	–	1154
2023 Q2	$270K	Buy	+11,000	New	+$354K	﹤0.01%	981
2019 Q1	–	Sell	-8,135	Closed	-$309K	–	1162
2018 Q4	$309K	Hold	8,135	–	–	﹤0.01%	1033
2018 Q3	$349K	Sell	8,135 -12,500	-61%	-$437K	﹤0.01%	1056
2018 Q2	$454K	Hold	20,635	–	–	﹤0.01%	1014
2018 Q1	$102K	Buy	+20,635	New	+$66.5K	﹤0.01%	1130

Other funds holding TNDM

GW&K Investment Management Boston, Massachusetts $11.8B AUM 29.45% 1-Year Est. Return

State Street Boston, Massachusetts $3.44T AUM 36.12% 1-Year Est. Return

UBS Group Zurich, Switzerland $765B AUM 28.39% 1-Year Est. Return

Paradice Investment Management Denver, Colorado $594M AUM 28.38% 1-Year Est. Return

BNP Paribas Financial Markets Paris, France $294B AUM 47.59% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.92T AUM 36.1% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.32T AUM 44.66% 1-Year Est. Return

Royce & Associates New York $11B AUM 39.4% 1-Year Est. Return

Bank of Montreal Toronto, Ontario, Canada $313B AUM 26.62% 1-Year Est. Return

Barclays London, United Kingdom $500B AUM 36.84% 1-Year Est. Return

Gabelli Funds's TNDM Position: Q3 2026 in Review

Gabelli Funds increased its Tandem Diabetes Care (TNDM) stake by 24% in Q3 2026, buying an estimated $469K and bringing the position to 128,000 shares worth $2.09M. The position accounts for 0.01% of the portfolio, ranked #745.

Gabelli Funds first reported a position in TNDM in Q1 2018 and has held it in 8 quarters since. 163 funds tracked by Wall St. Rank hold TNDM as of Q3 2026.

Gabelli Funds held 128,000 shares of Tandem Diabetes Care worth $2.09M as of Q3 2026.
Gabelli Funds bought 25,000 Tandem Diabetes Care shares in Q3 2026, an estimated $469K.
Tandem Diabetes Care made up 0.01% of Gabelli Funds's portfolio in Q3 2026, its #745 holding.
Gabelli Funds first reported a position in Tandem Diabetes Care in Q1 2018 and has held it in 8 quarters since.
163 funds tracked by Wall St. Rank held Tandem Diabetes Care as of Q3 2026.

Based on Gabelli Funds's 13F filing for Q3 2026, filed 12 Nov 2026.