Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionGeode Capital Management, Llc
Latest Disclosed Ownership2,607,732 shares
Latest Disclosed Value $ 2,008,490,441
Geode Capital Management, Llc reports 3.50% increase in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On May 15, 2026 - Geode Capital Management, Llc filed a 13F-HR form disclosing ownership of 2,607,732 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $2,008,490,441 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 2,519,540 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of 3.50% 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 2,607,732 88,192 3.50 2,008,490 3.71 0.0668
2026-02-09 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,519,540 -16,358 -0.65 1,936,711 36.42 0.1195
2025-11-12 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,535,898 70,844 2.87 1,419,627 10.18 0.0906
2025-08-08 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,465,054 -4,531 -0.18 1,288,520 -17.47 0.0903
2025-05-13 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,469,585 41,955 1.73 1,561,215 -9.60 0.1227
2025-02-12 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,427,630 155,369 6.84 1,726,940 -27.46 0.1338
2024-11-12 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,272,261 -143,089 -5.92 2,380,748 -6.00 0.1928
2024-08-09 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,415,350 38,759 1.63 2,532,608 10.97 0.2223
2024-05-13 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,376,591 22,374 0.95 2,282,279 10.65 0.2111
2024-02-13 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,354,217 34,231 1.48 2,062,650 8.24 0.2158
2023-11-13 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,319,986 38,857 1.70 1,905,566 16.54 0.2270
2023-08-11 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,281,129 63,136 2.85 1,635,148 -10.10 0.1921
2023-05-15 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,217,993 10,003 0.45 1,818,766 114,287.74 0.2362
2023-02-13 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,207,990 -32,123 -1.43 1,591 -99.90 0.2232
2022-11-14 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,240,113 26,009 1.17 1,541,887 17.96 0.2339
2022-08-12 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,214,104 121,333 5.80 1,307,149 -10.39 0.1915
2022-05-13 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,092,771 115,469 5.84 1,458,748 17.10 0.1821
2022-02-11 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,977,302 237,090 13.62 1,245,725 18.62 0.1500
2021-11-12 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,740,212 32,212 1.89 1,050,152 10.41 0.1414
2021-08-13 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,708,000 97,810 6.07 951,145 25.22 0.1310
2021-05-12 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,610,190 23,271 1.47 759,590 -0.66 0.1162
2021-02-12 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,586,919 -170,067 -9.68 764,602 -22.12 0.1283
2020-11-13 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,756,986 235,853 15.51 981,734 3.69 0.1924
2020-08-13 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,521,133 188,616 14.15 946,787 45.78 0.2025
2020-05-14 2020-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,332,517 65,789 5.19 649,463 36.82 0.1693
2020-02-20 2019-12-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 1,266,728 25,165 2.03 474,673 38.03 0.0992
2020-02-13 2019-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,266,728 25,165 474,673 60,492.9119
2019-11-12 2019-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,241,563 81,002 6.98 343,888 -5.17 0.0803
2019-08-14 2019-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,160,561 62,713 5.71 362,631 -19.42 0.0877
2019-05-14 2019-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,097,848 19,395 1.80 450,007 11.90 0.1166
2019-03-06 2018-12-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 1,078,453 78,143 7.81 402,138 -0.32 0.1243
2019-02-13 2018-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,078,453 78,143 402,138
2018-11-13 2018-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,000,310 29,493 3.04 403,437 20.69 0.1137
2018-08-14 2018-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 970,817 34,841 3.72 334,279 3.95 0.1028
2018-05-15 2018-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 935,976 55,495 6.30 321,570 -2.67 0.1048
2018-02-13 2017-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 880,481 30,581 3.60 330,385 -12.90 0.1122
2017-11-14 2017-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 849,900 20,395 2.46 379,322 -6.75 0.1400
2017-08-14 2017-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 829,505 97,071 13.25 406,763 43.52 0.1600
2017-06-21 2017-03-31 13F/A-1 REGENERON PHARMACEUTICALS COM COM 75886F107 732,434 62,796 9.38 283,415 15.44 0.1163
2017-05-12 2017-03-31 13F REGENERON PHARMACEUTICALS COM COM 75886F107 732,434 283,415
2017-02-14 2016-12-31 13F REGENERON PHARMACEUTICALS COM COM 75886F107 669,638 31,097 4.87 245,512 -4.20 0.1142
2016-11-10 2016-09-30 13F REGENERON PHARMACEUTICALS COM COM 75886F107 638,541 1,979 0.31 256,287 15.49 0.1291
2016-08-12 2016-06-30 13F REGENERON PHARMACEUTICALS COM COM 75886F107 636,562 -4,248 -0.66 221,916 -3.73 0.1207
2016-05-13 2016-03-31 13F REGENERON PHARMACEUTICALS COM COM 75886F107 640,810 14,289 2.28 230,512 -32.09 0.1223
2016-02-12 2015-12-31 13F REGENERON PHARMACEUTICALS COM COM 75886F107 626,521 5,085 0.82 339,423 17.65 0.1934
2015-11-13 2015-09-30 13F REGENERON PHARMACEUTICALS COM COM 75886F107 621,436 20,244 3.37 288,495 -5.75 0.1750
2015-08-14 2015-06-30 13F REGENERON PHARMACEUTICALS COM COM 75886F107 601,192 18,970 3.26 306,090 16.63 0.1747
2015-05-14 2015-03-31 13F REGENERON PHARMACEUTICALS COM COM 75886F107 582,222 19,294 3.43 262,446 13.79 0.1500
2015-02-12 2014-12-31 13F REGENERON PHARMACEUTICALS COM COM 75886F107 562,928 24,929 4.63 230,639 19.06 0.1372
2014-11-14 2014-09-30 13F REGENERON PHARMACEUTICALS COM COM 75886F107 537,999 -41,519 -7.16 193,709 18.41 0.1256
2014-08-13 2014-06-30 13F REGENERON PHARMACEUTICALS COM COM 75886F107 579,518 3,446 0.60 163,597 -5.38 0.1058
2014-05-14 2014-03-31 13F REGENERON PHARMACEUTICALS COM COM 75886F107 576,072 4,195 0.73 172,908 9.88 0.1160
2014-02-14 2013-12-31 13F REGENERON PHARMACEUTICALS COM COM 75886F107 571,877 21,813 3.97 157,357 -8.54 0.1091
2013-11-14 2013-09-30 13F REGENERON PHARMACEUTICALS COM COM 75886F107 550,064 30,553 5.88 172,056 47.30 0.1380
2013-08-14 2013-06-30 13F REGENERON PHARMACEUTICALS COM COM 75886F107 519,511 519,511 116,803 0.1027
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.