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CSS LLC’s Regeneron Pharmaceuticals REGN Stock Holding History

CSS LLC’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
2020
Q4 		– Sell
-3,800
Closed -$2.13M – 928
2020
Q3 		$2.13M Buy
3,800
+2,000
+111% +$1.21M 0.1% 180
2020
Q2 		$1.12M Sell
1,800
-2,200
-55% -$1.25M 0.06% 245
2020
Q1 		$1.95M Buy
+4,000
New +$1.65M 0.15% 132

Other funds holding REGN

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Dodge & Cox
Dodge & Cox San Francisco, California $182B AUM 14.68% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
Franklin Resources
Franklin Resources San Mateo, California $408B AUM 30.18% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
N
Nuveen Charlotte, North Carolina $369B AUM 31.66% 1-Year Est. Return

CSS LLC's REGN Position: Q1 2026 in Review

CSS LLC increased its Regeneron Pharmaceuticals (REGN) stake by 244% in Q1 2026, buying an estimated $635K and bringing the position to 1,170 shares worth $904K. The position accounts for 0.04% of the portfolio, ranked #368.

CSS LLC first reported a position in REGN in Q4 2013 and has held it in 14 quarters since. The position peaked at $2.82M in Q4 2013. 1,392 funds tracked by Wall St. Rank hold REGN as of Q1 2026.

  • CSS LLC held 1,170 shares of Regeneron Pharmaceuticals worth $904K as of Q1 2026.
  • CSS LLC bought 830 Regeneron Pharmaceuticals shares in Q1 2026, an estimated $635K.
  • Regeneron Pharmaceuticals made up 0.04% of CSS LLC's portfolio in Q1 2026, its #368 holding.
  • CSS LLC first reported a position in Regeneron Pharmaceuticals in Q4 2013 and has held it in 14 quarters since.
  • CSS LLC's Regeneron Pharmaceuticals position peaked at $2.82M in Q4 2013.
  • 1,392 funds tracked by Wall St. Rank held Regeneron Pharmaceuticals as of Q1 2026.

Based on CSS LLC's 13F filing for Q1 2026, filed 15 May 2026.