Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionConning Inc.
Latest Disclosed Ownership461 shares
Latest Disclosed Value $ 356,187
Conning Inc. reports 13.18% decrease in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On April 30, 2026 - Conning Inc. filed a 13F-HR form disclosing ownership of 461 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $356,187 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 531 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of -13.18% 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)
2026-04-30 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 461 -70 -13.18 356 -12.96 0.0118
2026-02-05 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 531 11 2.12 410 40.07 0.0137
2025-10-28 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 520 0 0.00 292 6.96 0.0097
2025-07-24 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 520 -28 -5.11 273 -21.33 0.0094
2025-04-29 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 548 -3 -0.54 348 -11.48 0.0122
2025-01-28 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 551 -73 -11.70 392 -40.15 0.0138
2024-10-29 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 624 -11 -1.73 656 -1.80 0.0217
2024-07-26 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 635 16 2.58 667 12.10 0.0240
2024-04-26 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 619 47 8.22 596 18.53 0.0195
2024-01-30 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 572 2 0.35 502 7.04 0.0175
2023-10-26 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 570 -9 -1.55 469 12.74 0.0171
2023-07-21 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 579 -70 -10.79 416 -21.95 0.0139
2023-04-27 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 649 -7 -1.07 533 12.68 0.0178
2023-02-08 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 656 -4 -0.61 473 3.96 0.0154
2022-10-31 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 660 -34 -4.90 455 10.98 0.0162
2022-07-20 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 694 -4 -0.57 410 -15.81 0.0123
2022-05-02 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 698 -114 -14.04 487 -5.07 0.0133
2022-01-27 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 812 -17 -2.05 513 2.19 0.0137
2021-11-05 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 829 -311 -27.28 502 -21.19 0.0144
2021-07-29 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,140 -125 -9.88 637 6.34 0.0185
2021-04-23 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,265 -101 -7.39 599 -9.24 0.0180
2021-01-28 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,366 151 12.43 660 -2.94 0.0210
2020-10-21 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,215 35 2.97 680 -7.61 0.0239
2020-08-07 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,180 131 12.49 736 43.75 0.0273
2020-04-29 2020-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,049 -2 -0.19 512 29.62 0.0218
2020-01-29 2019-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,051 80 8.24 395 46.84 0.0129
2019-10-30 2019-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 971 -129 -11.73 269 -21.80 0.0093
2019-07-25 2019-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,100 -210 -16.03 344 -36.06 0.0114
2019-04-22 2019-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,310 -10 -0.76 538 9.13 0.0168
2019-01-29 2018-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,320 -400 -23.26 493 -29.06 0.0168
2018-10-26 2018-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,720 -260 -13.13 695 1.76 0.0206
2018-07-25 2018-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,980 -100 -4.81 683 -4.61 0.0208
2018-05-03 2018-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,080 -40 -1.89 716 -10.16 0.0230
2018-01-30 2017-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,120 10 0.47 797 -15.48 0.0263
2017-10-20 2017-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,110 0 0.00 943 -8.98 0.0321
2017-08-03 2017-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,110 0 0.00 1,036 26.65 0.0376
2017-04-27 2017-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,110 -10 -0.47 818 5.14 0.0302
2017-02-02 2016-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,120 270 14.59 778 4.57 0.0310
2016-10-25 2016-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,850 -100 -5.13 744 9.25 0.0297
2016-07-26 2016-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,950 -90 -4.41 681 -7.35 0.0281
2016-04-26 2016-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,040 0 0.00 735 -33.60 0.0309
2016-02-04 2015-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,040 -100 -4.67 1,107 11.26 0.0473
2015-10-23 2015-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,140 -110 -4.89 995 -13.33 0.0437
2015-08-03 2015-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,250 -10 -0.44 1,148 12.55 0.0471
2015-04-24 2015-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,260 10 0.44 1,020 10.51 0.0434
2015-02-13 2014-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,250 -10 -0.44 923 13.25 0.0451
2014-11-07 2014-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,260 250 12.44 815 43.49 0.0427
2014-07-25 2014-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,010 -100 -4.74 568 -10.41 0.0302
2014-04-25 2014-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,110 730 52.90 634 66.84 0.0372
2014-02-04 2013-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,380 410 42.27 380 25.41 0.0235
2013-11-04 2013-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 970 970 303 0.0234
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.