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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
2022
Q1 		– Sell
-10,000
Closed -$6.32M – 1290
2021
Q4 		$6.32M Buy
+10,000
New +$6.15M 0.22% 87
2020
Q4 		– Sell
-8,800
Closed -$4.93M – 930
2020
Q3 		$4.93M Buy
8,800
+3,000
+52% +$1.82M 0.23% 90
2020
Q2 		$3.62M Buy
5,800
+1,800
+45% +$1.02M 0.2% 112
2020
Q1 		$1.95M Sell
4,000
-6,000
-60% -$2.47M 0.15% 133
2019
Q4 		$3.75M Buy
+10,000
New +$3.36M 0.21% 101

Other funds holding REGN

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Dodge & Cox
Dodge & Cox San Francisco, California $191B AUM 17.5% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Franklin Resources
Franklin Resources San Mateo, California $462B AUM 39.16% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Nuveen
Nuveen Charlotte, North Carolina $419B AUM 43.02% 1-Year Est. Return

CSS LLC's REGN Position: Q2 2026 in Review

CSS LLC increased its Regeneron Pharmaceuticals (REGN) stake by 56% in Q2 2026, buying an estimated $442K and bringing the position to 1,820 shares worth $1.13M. The position accounts for 0.04% of the portfolio, ranked #313.

CSS LLC first reported a position in REGN in Q4 2013 and has held it in 15 quarters since. The position peaked at $2.82M in Q4 2013. 1,336 funds tracked by Wall St. Rank hold REGN as of Q2 2026.

  • CSS LLC held 1,820 shares of Regeneron Pharmaceuticals worth $1.13M as of Q2 2026.
  • CSS LLC bought 650 Regeneron Pharmaceuticals shares in Q2 2026, an estimated $442K.
  • Regeneron Pharmaceuticals made up 0.04% of CSS LLC's portfolio in Q2 2026, its #313 holding.
  • CSS LLC first reported a position in Regeneron Pharmaceuticals in Q4 2013 and has held it in 15 quarters since.
  • CSS LLC's Regeneron Pharmaceuticals position peaked at $2.82M in Q4 2013.
  • 1,336 funds tracked by Wall St. Rank held Regeneron Pharmaceuticals as of Q2 2026.

Based on CSS LLC's 13F filing for Q2 2026, filed 14 Aug 2026.