GI
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GAMCO Investors’s Regeneron Pharmaceuticals REGN Stock Holding History

GAMCO Investors’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 		$410K Buy
657
+18
+3% +$12.3K ﹤0.01% 783
2026
Q1 		$494K Sell
639
-10
-2% -$7.66K ﹤0.01% 769
2025
Q4 		$501K Buy
649
+3
+0.5% +$2.04K ﹤0.01% 799
2025
Q3 		$363K Buy
646
+44
+7% +$24.9K ﹤0.01% 879
2025
Q2 		$316K Buy
602
+13
+2% +$7.26K ﹤0.01% 924
2025
Q1 		$374K Buy
589
+26
+5% +$17.9K ﹤0.01% 719
2024
Q4 		$401K Buy
563
+198
+54% +$166K ﹤0.01% 725
2024
Q3 		$384K Buy
365
+58
+19% +$64.5K ﹤0.01% 733
2024
Q2 		$323K Buy
307
+68
+28% +$65.9K ﹤0.01% 750
2024
Q1 		$230K Buy
+239
New +$227K ﹤0.01% 798
2017
Q4 		– Sell
-482
Closed -$216K – 846
2017
Q3 		$216K Sell
482
-10
-2% -$4.76K ﹤0.01% 800
2017
Q2 		$242K Buy
+492
New +$215K ﹤0.01% 783
2016
Q4 		– Sell
-529
Closed -$213K – 823
2016
Q3 		$213K Sell
529
-800
-60% -$321K ﹤0.01% 765
2016
Q2 		$464K Sell
1,329
-14
-1% -$5.39K ﹤0.01% 692
2016
Q1 		$484K Sell
1,343
-35
-3% -$14.4K ﹤0.01% 670
2015
Q4 		$748K Sell
1,378
-767
-36% -$416K ﹤0.01% 635
2015
Q3 		$998K Hold
2,145
– – 0.01% 609
2015
Q2 		$1.09M Sell
2,145
-45
-2% -$22K 0.01% 603
2015
Q1 		$989K Hold
2,190
– – 0.01% 629
2014
Q4 		$898K Hold
2,190
– – ﹤0.01% 657
2014
Q3 		$790K Sell
2,190
-105
-5% -$35.2K ﹤0.01% 672
2014
Q2 		$648K Buy
+2,295
New +$680K ﹤0.01% 706

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

GAMCO Investors's REGN Position: Q2 2026 in Review

GAMCO Investors increased its Regeneron Pharmaceuticals (REGN) stake by 2.8% in Q2 2026, buying an estimated $12.3K and bringing the position to 657 shares worth $410K. The position accounts for ﹤0.01% of the portfolio, ranked #783.

GAMCO Investors first reported a position in REGN in Q2 2014 and has held it in 22 quarters since. The position peaked at $1.09M in Q2 2015. 1,336 funds tracked by Wall St. Rank hold REGN as of Q2 2026.

  • GAMCO Investors held 657 shares of Regeneron Pharmaceuticals worth $410K as of Q2 2026.
  • GAMCO Investors bought 18 Regeneron Pharmaceuticals shares in Q2 2026, an estimated $12.3K.
  • Regeneron Pharmaceuticals made up ﹤0.01% of GAMCO Investors's portfolio in Q2 2026, its #783 holding.
  • GAMCO Investors first reported a position in Regeneron Pharmaceuticals in Q2 2014 and has held it in 22 quarters since.
  • GAMCO Investors's Regeneron Pharmaceuticals position peaked at $1.09M in Q2 2015.
  • 1,336 funds tracked by Wall St. Rank held Regeneron Pharmaceuticals as of Q2 2026.

Based on GAMCO Investors's 13F filing for Q2 2026, filed 12 Aug 2026.