Sienna Gestion’s Regeneron Pharmaceuticals REGN Stock Holding History

Sienna Gestion’s Portfolio REGN Stock Details REGN Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$1.13M	Hold	1,499	–	–	0.07%	118
2025 Q4	$1.15M	Buy	1,499 +1,004	+203%	+$682K	0.07%	137
2025 Q3	$254K	Sell	495 -9,627	-95%	-$5.44M	0.02%	156
2025 Q2	$4.85M	Buy	10,122 +957	+10%	+$534K	0.33%	104
2025 Q1	$5.65M	Sell	9,165 -566	-6%	-$389K	0.46%	81
2024 Q4	$6.93M	Hold	9,731	–	–	0.47%	77
2024 Q3	$10.2M	Buy	9,731 +1,932	+25%	+$2.15M	0.68%	53
2024 Q2	$8.19M	Hold	7,799	–	–	0.73%	45
2024 Q1	$7.51M	Buy	+7,799	New	+$7.42M	0.65%	60

Other funds holding REGN

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

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Dodge & Cox San Francisco, California $182B AUM 14.68% 1-Year Est. Return

JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return

Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

Franklin Resources San Mateo, California $408B AUM 30.18% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return

Nuveen Charlotte, North Carolina $369B AUM 31.66% 1-Year Est. Return

Sienna Gestion's REGN Position: Q1 2026 in Review

Sienna Gestion held its Regeneron Pharmaceuticals (REGN) position steady in Q1 2026 at 1,499 shares worth $1.13M. The position accounts for 0.07% of the portfolio, ranked #118.

Sienna Gestion first reported a position in REGN in Q1 2024 and has held it in 9 quarters since. The position peaked at $10.2M in Q3 2024. 1,392 funds tracked by Wall St. Rank hold REGN as of Q1 2026.

Sienna Gestion held 1,499 shares of Regeneron Pharmaceuticals worth $1.13M as of Q1 2026.
Sienna Gestion left its Regeneron Pharmaceuticals share count unchanged in Q1 2026.
Regeneron Pharmaceuticals made up 0.07% of Sienna Gestion's portfolio in Q1 2026, its #118 holding.
Sienna Gestion first reported a position in Regeneron Pharmaceuticals in Q1 2024 and has held it in 9 quarters since.
Sienna Gestion's Regeneron Pharmaceuticals position peaked at $10.2M in Q3 2024.
1,392 funds tracked by Wall St. Rank held Regeneron Pharmaceuticals as of Q1 2026.

Based on Sienna Gestion's 13F filing for Q1 2026, filed 15 May 2026.