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Rock Springs Capital Management’s Regeneron Pharmaceuticals REGN Stock Holding History

Rock Springs Capital Management’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
Q2 		– Sell
-10,100
Closed -$7.8M – 113
2026
Q1 		$7.8M Hold
10,100
– – 0.46% 54
2025
Q4 		$7.8M Sell
10,100
-1,200
-11% -$815K 0.4% 58
2025
Q3 		$6.35M Hold
11,300
– – 0.37% 62
2025
Q2 		$5.93M Buy
11,300
+8,500
+304% +$4.74M 0.37% 60
2025
Q1 		$1.78M Buy
+2,800
New +$1.93M 0.1% 79
2017
Q4 		– Sell
-16,000
Closed -$7.15M – 150
2017
Q3 		$7.15M Hold
16,000
– – 0.33% 89
2017
Q2 		$7.86M Buy
16,000
+900
+6% +$394K 0.4% 76
2017
Q1 		$5.85M Sell
15,100
-4,400
-23% -$1.63M 0.34% 84
2016
Q4 		$7.16M Buy
19,500
+2,500
+15% +$951K 0.48% 59
2016
Q3 		$6.83M Hold
17,000
– – 0.43% 66
2016
Q2 		$5.94M Buy
17,000
+500
+3% +$193K 0.44% 75
2016
Q1 		$5.95M Buy
16,500
+5,500
+50% +$2.27M 0.5% 68
2015
Q4 		$5.97M Hold
11,000
– – 0.45% 74
2015
Q3 		$5.12M Hold
11,000
– – 0.42% 78
2015
Q2 		$5.61M Buy
11,000
+1,000
+10% +$488K 0.41% 82
2015
Q1 		$4.51M Buy
10,000
+1,000
+11% +$424K 0.42% 75
2014
Q4 		$3.69M Buy
+9,000
New +$3.54M 0.43% 72
2014
Q3 		– Sell
-7,500
Closed -$2.12M – 87
2014
Q2 		$2.12M Hold
7,500
– – 0.38% 69
2014
Q1 		$2.25M Buy
+7,500
New +$2.31M 0.52% 57

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

Rock Springs Capital Management's REGN Position: Q2 2026 in Review

Rock Springs Capital Management sold out of Regeneron Pharmaceuticals (REGN) in Q2 2026, closing a stake of 10,100 shares — an estimated $7.8M sold.

Rock Springs Capital Management first reported a position in REGN in Q1 2014 and held it in 19 quarters. The position peaked at $7.86M in Q2 2017. 1,332 funds tracked by Wall St. Rank hold REGN as of Q2 2026.

  • Rock Springs Capital Management reported no remaining Regeneron Pharmaceuticals position as of Q2 2026 after selling out during the quarter.
  • Rock Springs Capital Management sold 10,100 Regeneron Pharmaceuticals shares in Q2 2026, an estimated $7.8M.
  • Rock Springs Capital Management first reported a position in Regeneron Pharmaceuticals in Q1 2014 and held it in 19 quarters.
  • Rock Springs Capital Management's Regeneron Pharmaceuticals position peaked at $7.86M in Q2 2017.
  • 1,332 funds tracked by Wall St. Rank held Regeneron Pharmaceuticals as of Q2 2026.

Based on Rock Springs Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.