Regeneron Pharmaceuticals: which funds bought and sold

Institutions that bought and sold Regeneron Pharmaceuticals shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 589 institutions that filed 13F reports for both quarters added to or opened positions in Regeneron Pharmaceuticals, and 699 cut or closed them. Together they sold a net 6,820 shares, −0.0% on what they held at the start of the quarter. Active managers and hedge funds on our list were net sellers of 1.7M shares (−7.2%); index fund managers were net buyers of 1.8M shares (+6.5%). 106 opened a new position and 165 sold out entirely.

Bought, Q2 2026 589 institutions, 106 of them new holders Sold, Q2 2026 699 institutions, 165 of them sold out

Net change, all compared −6,820 shares (−0.0%)

Net change, active managers −1.7M shares (−7.2%), 57 bought, 42 sold

Buyers versus sellers

institutions compared, 1,472

589 bought 184 699 sold

Active managers and hedge funds 57 bought · 42 sold · −1.7M

Index fund managers 7 bought · 5 sold · +1.8M

Other institutions 525 bought · 652 sold · −78K

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Vanguard Portfolio Management LLC Index funds	+1.5M +84.5%	3.2M	$2B
Dodge & Cox Active manager	+413K +9.3%	4.9M	$3B
Assenagon Asset Management S.A.	+282K +135.7%	490K	$305M
SG Americas Securities, LLC	+269K +170.2%	428K	$267M
Nordea Investment Management AB	+269K +285.4%	363K	$227M
Worldquant Millennium Advisors LLC Hedge fund	+253K +251.6%	354K	$221M
Arrowstreet Capital, Limited Partnership Hedge fund	+222K +129.5%	394K	$245M
First Trust Advisors LP	+200K +57.7%	547K	$341M
State Street Corp Index funds	+170K +3.6%	4.8M	$3B
Blackrock, Inc. Index funds	+166K +1.9%	9.1M	$5.7B
Citigroup Inc	+162K +87.7%	347K	$216M
Susquehanna International Group, LLP	+150K +488.6%	180K	$112M
Voloridge Investment Management, LLC Hedge fund	+149K +967.2%	164K	$102M
KBC Group NV	+141K +366.6%	180K	$112M
Qube Research & Technologies Ltd Hedge fund	+138K +165.8%	222K	$138M
Jupiter Asset Management Ltd Active manager	+126K +47484.5%	126K	$78.6M
Thrivent Financial For Lutherans	+123K +1457.5%	131K	$82M
Man Group PLC Hedge fund	+122K +38.6%	437K	$272M
Robeco Institutional Asset Management B.V.	+112K +32.1%	461K	$287M
Millennium Management LLC Hedge fund	+102K +163.2%	165K	$103M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Dodge & Cox Active manager	+413K +9.3%	4.9M	$3B
Worldquant Millennium Advisors LLC Hedge fund	+253K +251.6%	354K	$221M
Arrowstreet Capital, Limited Partnership Hedge fund	+222K +129.5%	394K	$245M
Voloridge Investment Management, LLC Hedge fund	+149K +967.2%	164K	$102M
Qube Research & Technologies Ltd Hedge fund	+138K +165.8%	222K	$138M
Jupiter Asset Management Ltd Active manager	+126K +47484.5%	126K	$78.6M
Man Group PLC Hedge fund	+122K +38.6%	437K	$272M
Millennium Management LLC Hedge fund	+102K +163.2%	165K	$103M
Renaissance Technologies LLC Hedge fund	+81K +121.9%	148K	$92.4M
Panagora Asset Management Inc Active manager	+70K +66.6%	175K	$109M

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
FMR LLC Active manager	−686K −45.2%	832K	$519M
Price T Rowe Associates Inc Active manager	−648K −29.8%	1.5M	$954M
Capital World Investors Active manager	−604K −42.6%	815K	$508M
Wellington Management Group LLP Active manager	−567K −30.9%	1.3M	$792M
Jpmorgan Chase & Co	−538K −12.5%	3.8M	$2.4B
American Century Companies Inc Active manager	−500K −88.9%	62K	$38.8M
Voya Investment Management LLC	−284K −81.3%	66K	$40.8M
Manufacturers Life Insurance Company, The	−261K −63.8%	148K	$92.3M
Polar Capital Holdings PLC Active manager	−193K Sold out	0	—
Pictet Asset Management Holding SA	−184K −54.5%	154K	$96.5M
Royal Bank Of Canada	−177K −50.3%	175K	$109M
Two Sigma Investments, LP Hedge fund	−156K −19.2%	656K	$409M
Goldman Sachs Group Inc	−137K −10.6%	1.2M	$725M
Alliancebernstein L.P. Active manager	−135K −31.5%	292K	$226M
Bellevue Group AG	−121K −43.6%	157K	$98.1M
Jennison Associates LLC Active manager	−115K Sold out	0	—
Deutsche Bank Ag\	−107K −17.1%	518K	$323M
AQR Capital Management LLC Hedge fund	−105K −8.5%	1.1M	$702M
Capital Research Global Investors Active manager	−102K Sold out	0	—
Zurich Insurance Group Ltd	−99K Sold out	0	—

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
FMR LLC Active manager	−686K −45.2%	832K	$519M
Price T Rowe Associates Inc Active manager	−648K −29.8%	1.5M	$954M
Capital World Investors Active manager	−604K −42.6%	815K	$508M
Wellington Management Group LLP Active manager	−567K −30.9%	1.3M	$792M
American Century Companies Inc Active manager	−500K −88.9%	62K	$38.8M
Polar Capital Holdings PLC Active manager	−193K Sold out	0	—
Two Sigma Investments, LP Hedge fund	−156K −19.2%	656K	$409M
Alliancebernstein L.P. Active manager	−135K −31.5%	292K	$226M
Jennison Associates LLC Active manager	−115K Sold out	0	—
AQR Capital Management LLC Hedge fund	−105K −8.5%	1.1M	$702M

New positions

largest by value

Institution	Shares	Value June 30, 2026
HRT Financial LP	36K	$22.5M
Aquatic Capital Management LLC	33K	$20.3M
Ranmore Fund Management Ltd	30K	$18.7M
Steelpeak Wealth, LLC	22K	$13.7M
Bluespring Wealth Management, LLC	20K	$12.3M
Sio Capital Management, LLC	18K	$11.2M
Jump Financial, LLC	16K	$10.1M
Sector Gamma As	16K	$9.8M
United Super Pty Ltd In Its Capacity As Trustee For The Construction & Building Unions Superannuation Fund	13K	$7.8M
Headlands Technologies LLC	11K	$6.6M

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Polar Capital Holdings PLCActive manager	193K	$149M
Jennison Associates LLCActive manager	115K	$89M
Capital Research Global InvestorsActive manager	102K	$78.7M
Zurich Insurance Group Ltd	99K	$76.5M
Freestone Grove Partners LPHedge fund	31K	$23.7M
Catawba River Capital	17K	$13M
Picton Mahoney Asset Management	15K	$11.9M
Orbimed Advisors LLC	15K	$11.4M
Vestor Capital, LLC	12K	$9M
Simplify Asset Management Inc.	11K	$8.4M

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 1,323
Ten largest holders: 47.8%
Index fund managers: 31.7%
Active managers and hedge funds: 24.0%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	57	42	6	14	−1.7M	−7.2%
Index fund managers	7	5	0	0	+1.8M	+6.5%
Other institutions	525	652	100	151	−78K	−0.2%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Regeneron Pharmaceuticals.

Only managers that filed a holdings report for both quarters are compared (1,472 here). 41 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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