Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionPrincipal Financial Group Inc
Latest Disclosed Ownership120,425 shares
Latest Disclosed Value $ 93,045,172
Principal Financial Group Inc reports 0.67% increase in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On May 4, 2026 - Principal Financial Group Inc filed a 13F-HR form disclosing ownership of 120,425 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $93,045,172 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 119,625 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of 0.67% 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)
2026-05-04 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 120,425 800 0.67 93,045 0.77 0.0254
2026-02-02 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 119,625 1,142 0.96 92,335 38.60 0.0471
2025-11-04 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 118,483 -4,766 -3.87 66,619 2.96 0.0336
2025-08-08 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 123,249 -6,376 -4.92 64,706 -21.29 0.0342
2025-04-28 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 129,625 -865 -0.66 82,212 -11.55 0.0461
2025-01-31 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 130,490 -42,602 -24.61 92,952 -48.92 0.0507
2024-10-31 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 173,092 2,828 1.66 181,961 1.68 0.1002
2024-07-29 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 170,264 1,852 1.10 178,953 10.40 0.1063
2024-04-29 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 168,412 37,685 28.83 162,095 41.18 0.0953
2024-02-07 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 130,727 -628 -0.48 114,816 6.21 0.0732
2023-11-02 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 131,355 -1,672 -1.26 108,100 13.09 0.0777
2023-08-07 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 133,027 -3,241 -2.38 95,585 -14.63 0.0653
2023-05-09 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 136,268 1,614 1.20 111,967 15.25 0.0800
2023-02-09 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 134,654 -9,777 -6.77 97,152 -2.35 0.0732
2022-11-09 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 144,431 14,963 11.56 99,494 30.00 0.0791
2022-08-10 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 129,468 123,048 1,916.64 76,532 1,606.78 0.0566
2022-05-09 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 6,420 -119,461 -94.90 4,484 -94.36 0.0018
2022-05-09 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 126,145 88,102
2022-02-09 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 125,881 -2,415 -1.88 79,496 2.39 0.0475
2021-11-09 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 128,296 2,682 2.14 77,643 10.66 0.0506
2021-08-10 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 125,614 -6,296 -4.77 70,161 12.42 0.0453
2021-05-10 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 131,910 -9,970 -7.03 62,412 -8.95 0.0440
2021-02-23 2020-12-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 141,880 -6,275 -4.24 68,544 -17.35 0.0508
2021-02-08 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 141,880 -6,275 68,544 26,966.2659
2020-11-06 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 148,155 -3,617 -2.38 82,934 -12.38 0.0698
2020-08-05 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 151,772 34,093 28.97 94,653 64.73 0.0839
2020-05-12 2020-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 117,679 6,645 5.98 57,461 37.83 0.0636
2020-02-05 2019-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 111,034 -3,453 -3.02 41,691 31.28 0.0347
2019-11-13 2019-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 114,487 1,639 1.45 31,758 -10.09 0.0280
2019-08-12 2019-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 112,848 -2,952 -2.55 35,321 -25.72 0.0318
2019-05-10 2019-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 115,800 712 0.62 47,549 10.62 0.0443
2019-02-14 2018-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 115,088 -1,543 -1.32 42,985 -8.78 0.0458
2018-11-14 2018-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 116,631 2,315 2.03 47,123 19.49 0.0415
2018-08-13 2018-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 114,316 442 0.39 39,438 0.57 0.0363
2018-05-14 2018-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 113,874 -295 -0.26 39,213 -8.64 0.0377
2018-02-12 2017-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 114,169 2,087 1.86 42,923 -14.35 0.0395
2017-11-02 2017-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 112,082 -3,119 -2.71 50,114 -11.43 0.0486
2017-08-08 2017-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 115,201 2,646 2.35 56,580 29.72 0.0567
2017-05-11 2017-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 112,555 2,263 2.05 43,616 7.73 0.0525
2017-02-13 2016-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 110,292 -404 -0.36 40,487 -9.02 0.0514
2016-11-10 2016-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 110,696 -1,275 -1.14 44,502 13.80 0.0588
2016-08-09 2016-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 111,971 2,350 2.14 39,104 -1.03 0.0545
2016-05-10 2016-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 109,621 3,038 2.85 39,512 -31.71 0.0574
2016-02-09 2015-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 106,583 2,198 2.11 57,861 19.17 0.0860
2015-11-12 2015-09-30 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 104,385 3,236 3.20 48,554 -5.90 0.0763
2015-11-09 2015-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 104,385 48,554
2015-08-10 2015-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 101,149 4,346 4.49 51,600 18.07 0.0770
2015-05-14 2015-03-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 96,803 2,007 2.12 43,704 12.38 0.0651
2015-05-12 2015-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 96,803 43,705
2015-02-12 2014-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 94,796 2,855 3.11 38,890 17.33 0.0604
2014-11-13 2014-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 91,941 -6,359 -6.47 33,147 19.38 0.0562
2014-08-12 2014-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 98,300 -965 -0.97 27,767 -6.84 0.0467
2014-05-13 2014-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 99,265 2,189 2.25 29,807 11.56 0.0532
2014-02-12 2013-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 97,076 758 0.79 26,719 -11.34 0.0499
2013-11-05 2013-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 96,318 2,806 3.00 30,135 43.30 0.0622
2013-08-12 2013-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 93,512 93,512 21,029 0.0466
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.