Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionFranklin Resources Inc
Latest Disclosed Ownership2,722,071 shares
Latest Disclosed Value $ 2,103,180,552
Franklin Resources Inc reports 6.33% increase in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On May 13, 2026 - Franklin Resources Inc filed a 13F-HR form disclosing ownership of 2,722,071 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $2,103,180,552 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 2,560,004 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of 6.33% 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)
2026-05-13 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,722,071 162,067 6.33 2,103,181 6.44 0.0837
2026-02-11 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,560,004 106,861 4.36 1,975,990 43.26 0.4848
2025-11-13 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,453,143 139,647 6.04 1,379,329 13.56 0.3440
2025-08-12 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,313,496 36,821 1.62 1,214,585 -15.88 0.3220
2025-05-13 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,276,675 231,465 11.32 1,443,936 -0.89 0.4154
2025-02-12 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,045,210 149,124 7.86 1,456,864 -23.83 0.4045
2024-11-27 2024-09-30 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 1,896,086 -27,016 -1.40 1,912,695 -5.37 0.5371
2024-11-12 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,238,791 315,689 2,270,693 0.1094
2024-08-14 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,923,102 228,804 13.50 2,021,238 23.95 0.6214
2024-05-13 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,694,298 1,210,185 249.98 1,630,745 283.53 0.5164
2024-02-09 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 484,113 903 0.19 425,192 6.92 0.1988
2023-11-13 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 483,210 -5,454 -1.12 397,663 13.25 0.2021
2023-08-11 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 488,664 -1,120 -0.23 351,125 -12.75 0.1669
2023-05-12 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 489,784 -13,689 -2.72 402,441 10.79 0.2019
2023-02-10 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 503,473 -22,724 -4.32 363,251 0.21 0.1888
2022-11-14 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 526,197 1,511 0.29 362,480 16.87 0.1975
2022-08-11 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 524,686 -39,074 -6.93 310,158 -21.23 0.1538
2022-05-13 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 563,760 -68,688 -10.86 393,740 -1.42 0.1573
2022-02-11 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 632,448 26,801 4.43 399,417 8.97 0.1441
2021-11-12 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 605,647 -7,138 -1.16 366,525 7.09 0.1380
2021-08-13 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 612,785 22,781 3.86 342,265 22.61 0.1308
2021-05-13 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 590,004 -26,184 -4.25 279,154 -6.23 0.1136
2021-02-10 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 616,188 -104,349 -14.48 297,687 -26.20 0.1260
2020-11-12 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 720,537 26,793 3.86 403,371 -8.79 0.1953
2020-08-13 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 693,744 110,879 19.02 442,267 55.40 0.2278
2020-05-13 2020-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 582,865 -76,316 -11.58 284,606 14.99 0.1900
2020-03-11 2019-12-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 659,181 -42,834 -6.10 247,509 27.10 0.1300
2020-02-12 2019-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 659,181 -42,834 247,509 31,263.7753
2019-11-14 2019-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 702,015 20,208 2.96 194,738 -8.75 0.1058
2019-08-14 2019-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 681,807 112,147 19.69 213,407 -8.77 0.1135
2019-05-15 2019-03-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 569,660 -10,047 -1.73 233,914 8.03 0.1253
2019-05-14 2019-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 569,660 -10,047 233,914
2019-02-12 2018-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 579,707 -73,178 -11.21 216,520 -17.92 0.1307
2018-11-13 2018-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 652,885 -37,070 -5.37 263,792 10.82 0.1313
2018-08-14 2018-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 689,955 -77,905 -10.15 238,028 -9.99 0.1221
2018-05-10 2018-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 767,860 -51,936 -6.34 264,447 -14.20 0.1341
2018-02-14 2017-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 819,796 35,123 4.48 308,212 -12.15 0.1479
2017-11-13 2017-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 784,673 8,415 1.08 350,843 -7.98 0.1720
2017-08-10 2017-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 776,258 -36,696 -4.51 381,251 21.02 0.1901
2017-05-12 2017-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 812,954 -98,673 -10.82 315,028 -5.87 0.1599
2017-02-14 2016-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 911,627 127,891 16.32 334,662 6.21 0.1733
2016-11-14 2016-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 783,736 20,901 2.74 315,091 18.27 0.1647
2016-08-11 2016-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 762,835 95,552 14.32 266,412 10.77 0.1433
2016-05-10 2016-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 667,283 30,562 4.80 240,516 -30.42 0.1277
2016-04-27 2015-12-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 636,721 37,168 6.20 345,656 23.95 0.1750
2016-02-12 2015-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 636,721 345,656
2015-11-10 2015-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 599,553 -7,515 -1.24 278,876 -9.95 0.1377
2015-08-12 2015-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 607,068 17,886 3.04 309,683 16.42 0.1406
2015-05-14 2015-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 589,182 -14,268 -2.36 266,004 7.45 0.1206
2015-02-10 2014-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 603,450 58,632 10.76 247,565 26.04 0.1123
2014-11-12 2014-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 544,818 -304,919 -35.88 196,418 -18.17 0.0896
2014-08-12 2014-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 849,737 -266,374 -23.87 240,025 -28.38 0.1057
2014-05-13 2014-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,116,111 601,619 116.93 335,144 136.67 0.1583
2014-02-12 2013-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 514,492 149,155 40.83 141,609 23.89 0.0692
2013-11-14 2013-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 365,337 192,763 111.70 114,303 194.53 0.0608
2013-08-09 2013-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 172,574 172,574 38,808 0.0222
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.