Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionPanagora Asset Management Inc
Latest Disclosed Ownership105,225 shares
Latest Disclosed Value $ 81,301,044
Panagora Asset Management Inc reports 120.67% increase in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On May 14, 2026 - Panagora Asset Management Inc filed a 13F-HR form disclosing ownership of 105,225 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $81,301,044 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 47,685 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of 120.67% 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)
2026-05-14 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 105,225 57,540 120.67 81,301 120.89 0.3046
2026-02-13 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 47,685 -29,988 -38.61 36,807 -15.72 0.1304
2025-11-13 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 77,673 75,493 3,462.98 43,673 3,717.57 0.1760
2025-08-13 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,180 -100,768 -97.88 1,144 -98.25 0.0052
2025-05-15 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 102,948 -334 -0.32 65,293 -11.25 0.3261
2025-02-13 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 103,282 -48,880 -32.12 73,571 -54.01 0.3400
2024-11-13 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 152,162 -18,596 -10.89 159,959 -10.87 0.7643
2024-07-29 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 170,758 2,803 1.67 179,472 11.02 0.9025
2024-05-07 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 167,955 12,997 8.39 161,655 18.78 0.8426
2024-02-08 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 154,958 -3,486 -2.20 136,098 4.38 0.7613
2023-10-31 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 158,444 2,364 1.51 130,393 16.27 0.8098
2023-08-11 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 156,080 8,677 5.89 112,150 -7.40 0.6607
2023-05-12 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 147,403 16,301 12.43 121,117 28.05 0.7655
2023-02-13 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 131,102 -34,854 -21.00 94,589 -17.26 0.6203
2022-11-14 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 165,956 -2,777 -1.65 114,322 14.62 0.7928
2022-08-15 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 168,733 -5,670 -3.25 99,743 -18.11 0.6538
2022-05-12 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 174,403 1,567 0.91 121,807 11.60 0.6634
2022-02-10 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 172,836 -14,171 -7.58 109,149 -3.56 0.5780
2021-11-10 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 187,007 24,981 15.42 113,173 25.06 0.6048
2021-08-11 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 162,026 14,706 9.98 90,498 29.83 0.4849
2021-05-12 2021-03-31 13F REGENERON PHARMACEUTICALS COMMON 75886F107 147,320 11,148 8.19 69,703 5.95 0.3914
2021-02-10 2020-12-31 13F REGENERON PHARMACEUTICALS COMMON 75886F107 136,172 5,787 4.44 65,786 -9.87 0.3893
2020-11-13 2020-09-30 13F REGENERON PHARMACEUTICALS COMMON 75886F107 130,385 -2,586 -1.94 72,987 -11.99 0.4572
2020-08-12 2020-06-30 13F REGENERON PHARMACEUTICALS COMMON 75886F107 132,971 -32,527 -19.65 82,927 2.62 0.5286
2020-05-14 2020-03-31 13F REGENERON PHARMACEUTICALS COMMON 75886F107 165,498 41,269 33.22 80,811 73.24 0.5716
2020-02-12 2019-12-31 13F REGENERON PHARMACEUTICALS COMMON 75886F107 124,229 21,802 21.29 46,646 64.17 0.2118
2019-11-12 2019-09-30 13F REGENERON PHARMACEUTICALS COMMON 75886F107 102,427 2,999 3.02 28,413 -8.70 0.1311
2019-08-09 2019-06-30 13F REGENERON PHARMACEUTICALS COMMON 75886F107 99,428 38,672 63.65 31,121 24.74 0.1392
2019-05-15 2019-03-31 13F REGENERON PHARMACEUTICALS COMMON 75886F107 60,756 52,675 651.84 24,948 726.64 0.1109
2019-02-14 2018-12-31 13F REGENERON PHARMACEUTICALS COMMON 75886F107 8,081 -97,994 -92.38 3,018 -92.96 0.0140
2018-11-13 2018-09-30 13F REGENERON PHARMACEUTICALS COMMON 75886F107 106,075 9,481 9.82 42,859 28.61 0.1613
2018-08-14 2018-06-30 13F REGENERON PHARMACEUTICALS COMMON 75886F107 96,594 -823 -0.84 33,324 -0.66 0.1321
2018-05-15 2018-03-31 13F REGENERON PHARMACEUTICALS COMMON 75886F107 97,417 42,662 77.91 33,547 62.96 0.1323
2018-02-14 2017-12-31 13F REGENERON PHARMACEUTICALS COMMON 75886F107 54,755 -12,922 -19.09 20,586 -31.97 0.0772
2017-11-14 2017-09-30 13F REGENERON PHARMACEUTICALS COMMON 75886F107 67,677 -3,613 -5.07 30,260 -13.57 0.1198
2017-08-14 2017-06-30 13F REGENERON PHARMACEUTICALS COMMON 75886F107 71,290 7,256 11.33 35,013 41.10 0.1409
2017-05-15 2017-03-31 13F REGENERON PHARMACEUTICALS COMMON 75886F107 64,034 -1,868 -2.83 24,814 2.57 0.1033
2017-02-14 2016-12-31 13F REGENERON PHARMACEUTICALS COMMON 75886F107 65,902 -3,569 -5.14 24,192 -13.38 0.1108
2016-11-14 2016-09-30 13F REGENERON PHARMACEUTICALS COMMON 75886F107 69,471 11,806 20.47 27,929 38.69 0.1331
2016-08-15 2016-06-30 13F REGENERON PHARMACEUTICALS COMMON 75886F107 57,665 -1,294 -2.19 20,138 -5.24 0.1000
2016-05-16 2016-03-31 13F REGENERON PHARMACEUTICALS COMMON 75886F107 58,959 -18,821 -24.20 21,251 -49.67 0.1055
2016-02-12 2015-12-31 13F REGENERON PHARMACEUTICALS COMMON 75886F107 77,780 -5,367 -6.45 42,224 9.18 0.2081
2015-11-13 2015-09-30 13F REGENERON PHARMACEUTICALS COMMON 75886F107 83,147 -18,072 -17.85 38,675 -25.10 0.2042
2015-08-14 2015-06-30 13F REGENERON PHARMACEUTICALS COMMON 75886F107 101,219 -732 -0.72 51,635 12.18 0.2588
2015-05-15 2015-03-31 13F REGENERON PHARMACEUTICALS COMMON 75886F107 101,951 41,312 68.13 46,029 85.03 0.2337
2015-02-13 2014-12-31 13F REGENERON PHARMACEUTICALS COMMON 75886F107 60,639 47,094 347.69 24,877 409.46 0.1272
2014-11-12 2014-09-30 13F REGENERON PHARMACEUTICALS COMMON 75886F107 13,545 10,652 368.20 4,883 497.67 0.0237
2014-08-14 2014-06-30 13F REGENERON PHARMACEUTICALS COMMON 75886F107 2,893 -2,112 -42.20 817 -45.64 0.0040
2014-05-15 2014-03-31 13F REGENERON PHARMACEUTICALS COMMON 75886F107 5,005 643 14.74 1,503 25.15 0.0071
2014-02-21 2013-12-31 13F REGENERON PHARMACEUTICALS COMMON 75886F107 4,362 -835 -16.07 1,201 -26.14 0.0056
2013-11-14 2013-09-30 13F REGENERON PHARMACEUTICALS COMMON 75886F107 5,197 272 5.52 1,626 46.75 0.0080
2013-08-14 2013-06-30 13F REGENERON PHARMACEUTICALS COMMON 75886F107 4,925 4,925 1,108 0.0057
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.