Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionAqr Capital Management Llc
ManagerCliff Asness
Latest Disclosed Ownership1,231,008 shares
Latest Disclosed Value $ 946,005,238
Aqr Capital Management Llc reports 23.63% increase in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On May 15, 2026 - Aqr Capital Management Llc filed a 13F-HR form disclosing ownership of 1,231,008 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $946,005,238 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 995,710 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of 23.63% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,231,008 235,298 23.63 946,005 23.09 0.0805
2026-02-17 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 995,710 274,356 38.03 768,518 89.48 0.4031
2025-11-14 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 721,354 606,612 528.67 405,596 579.65 0.2600
2025-08-14 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 114,742 -121,208 -51.37 59,677 -59.86 0.0494
2025-05-15 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 235,950 28,865 13.94 148,665 1.07 0.1532
2025-02-14 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 207,085 -18,449 -8.18 147,096 -37.47 0.1895
2024-11-14 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 225,534 36,243 19.15 235,232 18.46 0.3247
2024-08-14 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 189,291 6,839 3.75 198,572 13.32 0.3044
2024-05-15 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 182,452 -13,429 -6.86 175,231 1.97 0.2984
2024-02-14 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 195,881 5,712 3.00 171,852 9.81 0.3235
2023-11-14 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 190,169 -29,481 -13.42 156,501 0.93 0.3232
2023-08-14 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 219,650 -21,124 -8.77 155,064 -21.58 0.3296
2023-05-15 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 240,774 -68,381 -22.12 197,726 -10.62 0.4340
2023-02-14 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 309,155 -121,146 -28.15 221,219 -25.37 0.5040
2022-11-14 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 430,301 -120,115 -21.82 296,421 -8.28 0.7226
2022-08-15 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 550,416 41,635 8.18 323,171 -9.05 0.7304
2022-05-16 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 508,781 59,162 13.16 355,343 25.15 0.6744
2022-02-14 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 449,619 173,586 62.89 283,944 69.98 0.5147
2021-11-15 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 276,033 81,918 42.20 167,050 57.44 0.3097
2021-08-16 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 194,115 -96,546 -33.22 106,106 -22.84 0.1836
2021-05-17 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 290,661 -63,244 -17.87 137,523 -17.67 0.2249
2021-02-16 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 353,905 -111,199 -23.91 167,043 -35.84 0.2961
2020-11-16 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 465,104 103,282 28.54 260,356 16.85 0.4401
2020-08-17 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 361,822 -23,706 -6.15 222,813 24.23 0.3604
2020-05-15 2020-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 385,528 42,468 12.38 179,351 39.35 0.3017
2020-02-14 2019-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 343,060 48,009 16.27 128,706 58.44 0.1463
2019-11-14 2019-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 295,051 -55,846 -15.92 81,233 -26.04 0.0957
2019-08-14 2019-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 350,897 -32,960 -8.59 109,831 -30.15 0.1225
2019-05-14 2019-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 383,857 152,469 65.89 157,239 81.94 0.1668
2019-02-14 2018-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 231,388 47,207 25.63 86,423 16.13 0.1001
2018-11-15 2018-09-30 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 184,181 71,623 63.63 74,416 91.64 0.0712
2018-11-14 2018-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 112,558 0 38,831
2018-08-14 2018-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 112,558 -178,740 -61.36 38,831 -61.29 0.0391
2018-05-15 2018-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 291,298 197,650 211.06 100,311 184.91 0.1082
2018-02-14 2017-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 93,648 45,447 94.29 35,208 63.36 0.0369
2017-11-14 2017-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 48,201 42,577 757.06 21,552 680.30 0.0257
2017-08-14 2017-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 5,624 -3,181 -36.13 2,762 -19.05 0.0037
2017-05-15 2017-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 8,805 5,884 201.44 3,412 218.28 0.0045
2017-02-14 2016-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,921 -531 -15.38 1,072 -22.77 0.0015
2016-11-14 2016-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 3,452 1,167 51.07 1,388 73.93 0.0021
2016-08-15 2016-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,285 -8,806 -79.40 798 -80.04 0.0014
2016-07-29 2016-03-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 11,091 -34,259 -75.54 3,998 -83.76 0.0072
2016-05-16 2016-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 11,091 3,998
2016-02-16 2015-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 45,350 24,164 114.06 24,619 149.84 0.0431
2015-11-16 2015-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 21,186 4,382 26.08 9,854 14.96 0.0197
2015-08-14 2015-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 16,804 3,157 23.13 8,572 39.13 0.0170
2015-05-15 2015-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 13,647 4,974 57.35 6,161 73.16 0.0141
2015-04-22 2014-12-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 8,673 2,734 46.03 3,558 66.18 0.0075
2015-02-17 2014-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 8,823 3,620
2014-11-14 2014-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 5,939 -11,100 -65.14 2,141 -55.52 0.0059
2014-08-14 2014-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 17,039 -15,000 -46.82 4,813 -49.97 0.0130
2014-05-15 2014-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 32,039 -2,600 -7.51 9,621 0.91 0.0290
2014-02-14 2013-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 34,639 -8,077 -18.91 9,534 -28.66 0.0285
2013-11-14 2013-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 42,716 11,305 35.99 13,365 89.20 0.0471
2013-08-14 2013-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 31,411 14,291 83.48 7,064 141.17 0.0251
2013-05-29 2012-12-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 17,120 17,120 2,929 0.0125
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.