MFIM
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Mesirow Financial Investment Management’s Regeneron Pharmaceuticals REGN Stock Holding History

Mesirow Financial Investment 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 		$982K Sell
1,571
-131
-8% -$89.2K 0.02% 278
2026
Q1 		$1.32M Buy
1,702
+379
+29% +$290K 0.02% 245
2025
Q4 		$1.02M Sell
1,323
-628
-32% -$426K 0.02% 242
2025
Q3 		$1.1M Sell
1,951
-352
-15% -$199K 0.02% 253
2025
Q2 		$1.21M Sell
2,303
-234
-9% -$131K 0.02% 243
2025
Q1 		$1.61M Sell
2,537
-53
-2% -$36.5K 0.03% 213
2024
Q4 		$1.85M Sell
2,590
-20
-0.8% -$16.8K 0.04% 198
2024
Q3 		$2.74M Sell
2,610
-14
-0.5% -$15.6K 0.05% 173
2024
Q2 		$2.76M Sell
2,624
-73
-3% -$70.8K 0.06% 162
2024
Q1 		$2.6M Buy
2,697
+133
+5% +$126K 0.06% 172
2023
Q4 		$2.25M Buy
+2,564
New +$2.11M 0.08% 146

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

Mesirow Financial Investment Management's REGN Position: Q2 2026 in Review

Mesirow Financial Investment Management reduced its Regeneron Pharmaceuticals (REGN) stake by 7.7% in Q2 2026, selling an estimated $89.2K and leaving 1,571 shares worth $982K. The position accounts for 0.02% of the portfolio, ranked #278.

Mesirow Financial Investment Management first reported a position in REGN in Q4 2023 and has held it in 11 quarters since. The position peaked at $2.76M in Q2 2024. 1,333 funds tracked by Wall St. Rank hold REGN as of Q2 2026.

  • Mesirow Financial Investment Management held 1,571 shares of Regeneron Pharmaceuticals worth $982K as of Q2 2026.
  • Mesirow Financial Investment Management sold 131 Regeneron Pharmaceuticals shares in Q2 2026, an estimated $89.2K.
  • Regeneron Pharmaceuticals made up 0.02% of Mesirow Financial Investment Management's portfolio in Q2 2026, its #278 holding.
  • Mesirow Financial Investment Management first reported a position in Regeneron Pharmaceuticals in Q4 2023 and has held it in 11 quarters since.
  • Mesirow Financial Investment Management's Regeneron Pharmaceuticals position peaked at $2.76M in Q2 2024.
  • 1,333 funds tracked by Wall St. Rank held Regeneron Pharmaceuticals as of Q2 2026.

Based on Mesirow Financial Investment Management's 13F filing for Q2 2026, filed 22 Jul 2026.