Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionLazard Asset Management Llc
Latest Disclosed Ownership17,004 shares
Latest Disclosed Value $ 13,137,971
Lazard Asset Management Llc reports 56.89% increase in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On May 15, 2026 - Lazard Asset Management Llc filed a 13F-HR form disclosing ownership of 17,004 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $13,137,971 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 10,838 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of 56.89% 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.

Upgrade to unlock premium data and export to Excel .

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 17,004 6,166 56.89 13,138 57.05 0.0113
2026-02-17 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 10,838 458 4.41 8,366 43.33 0.0142
2025-11-14 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 10,380 10,129 4,035.46 5,836 0.0079
2025-08-14 2025-06-30 13F REGENERON PH Common Stock 75886F107 251 -16,712 -98.52 0 -100.00 0.0002
2025-05-15 2025-03-31 13F REGENERON PH Common Stock 75886F107 16,963 -2,949 -14.81 11 -28.57 0.0165
2025-02-14 2024-12-31 13F REGENERON PH Common Stock 75886F107 19,912 3,696 22.79 14 -17.65 0.0207
2024-11-14 2024-09-30 13F REGENERON PH Common Stock 75886F107 16,216 -234 -1.42 17 0.00 0.0228
2024-08-14 2024-06-30 13F REGENERON PH Common Stock 75886F107 16,450 141 0.86 17 13.33 0.0217
2024-07-09 2024-03-31 13F/A-1 REGENERON PH Common Stock 75886F107 16,309 5,627 52.68 16 66.67 0.0191
2024-05-14 2024-03-31 13F REGENERON PH Common Stock 75886F107 16,309 5,627 16 0.0190
2024-02-14 2023-12-31 13F REGENERON PH Common Stock 75886F107 10,682 -374 -3.38 9 0.00 0.0119
2023-11-14 2023-09-30 13F REGENERON PH Common Stock 75886F107 11,056 -100 -0.90 9 12.50 0.0124
2023-08-15 2023-06-30 13F REGENERON PH Common Stock 75886F107 11,156 -3,197 -22.27 8 -27.27 0.0099
2023-05-15 2023-03-31 13F REGENERON PH Common Stock 75886F107 14,353 177 1.25 12 -99.89 0.0155
2023-02-15 2022-12-31 13F REGENERON PH Common Stock 75886F107 14,176 1,031 7.84 10,226 12.94 0.0141
2022-11-14 2022-09-30 13F REGENERON PH Common Stock 75886F107 13,145 584 4.65 9,054 21.96 0.0132
2022-08-09 2022-06-30 13F REGENERON PH Common Stock 75886F107 12,561 2,995 31.31 7,424 11.14 0.0100
2022-05-13 2022-03-31 13F REGENERON PH Common Stock 75886F107 9,566 4,007 72.08 6,680 90.37 0.0077
2022-02-09 2021-12-31 13F REGENERON PH Common Stock 75886F107 5,559 80 1.46 3,509 5.88 0.0037
2021-11-15 2021-09-30 13F REGENERON PH Common Stock 75886F107 5,479 4,458 436.63 3,314 481.40 0.0037
2021-08-12 2021-06-30 13F REGENERON PH Common Stock 75886F107 1,021 -2,164 -67.94 570 -62.15 0.0006
2021-05-14 2021-03-31 13F REGENERON PH Common Stock 75886F107 3,185 -9,313 -74.52 1,506 -75.05 0.0018
2021-02-11 2020-12-31 13F REGENERON PH Common Stock 75886F107 12,498 -4,676 -27.23 6,037 -37.19 0.0076
2020-11-13 2020-09-30 13F REGENERON PH Common Stock 75886F107 17,174 -1,519 -8.13 9,612 -17.54 0.0135
2020-08-13 2020-06-30 13F REGENERON PH Common Stock 75886F107 18,693 12,795 216.94 11,657 304.90 0.0179
2020-05-14 2020-03-31 13F REGENERON PH Common Stock 75886F107 5,898 -954 -13.92 2,879 11.94 0.0053
2020-02-13 2019-12-31 13F REGENERON PH Common Stock 75886F107 6,852 160 2.39 2,572 38.58 0.0037
2019-11-14 2019-09-30 13F REGENERON PH Common Stock 75886F107 6,692 4,634 225.17 1,856 188.20 0.0031
2019-08-14 2019-06-30 13F REGENERON PH Common Stock 75886F107 2,058 -6,688 -76.47 644 -82.07 0.0010
2019-08-28 2019-03-31 13F/A-1 REGENERON PH Common Stock 75886F107 8,746 8,740 145,666.67 3,591 179,450.00 0.0059
2019-05-13 2019-03-31 13F REGENERON PH Common Stock 75886F107 8,746 8,740 3,591
2019-08-28 2018-12-31 13F/A-1 REGENERON PH Common Stock 75886F107 6 0 0.00 2 0.00 0.0000
2019-02-13 2018-12-31 13F REGENERON PH Common Stock 75886F107 6 0 2
2019-08-30 2018-09-30 13F/A-1 REGENERON PH Common Stock 75886F107 6 -2 -25.00 2 0.00 0.0000
2018-11-13 2018-09-30 13F REGENERON PH Common Stock 75886F107 6 -2 2
2019-08-30 2018-06-30 13F/A-1 REGENERON PH Common Stock 75886F107 8 4 100.00 2 100.00 0.0000
2018-08-13 2018-06-30 13F REGENERON PH Common Stock 75886F107 8 4 2
2019-08-28 2018-03-31 13F/A-1 REGENERON PH Common Stock 75886F107 4 0 0.00 1 0.00 0.0000
2018-05-14 2018-03-31 13F REGENERON PH Common Stock 75886F107 4 0 1
2019-08-28 2017-12-31 13F/A-1 REGENERON PH Common Stock 75886F107 4 0 0.00 1 0.00 0.0000
2018-02-13 2017-12-31 13F REGENERON PH Common Stock 75886F107 4 0 1
2019-08-19 2017-09-30 13F/A-1 REGENERON PH Common Stock 75886F107 4 0 0.00 1 0.00 0.0000
2017-11-13 2017-09-30 13F REGENERON PH Common Stock 75886F107 4 4 1
2019-08-19 2017-06-30 13F/A-1 REGENERON PH Common Stock 75886F107 4 0 0.00 1 0.00 0.0000
2019-08-13 2017-03-31 13F/A-1 REGENERON PH Common Stock 75886F107 4 0 0.00 1 0.00 0.0000
2017-05-12 2017-03-31 13F REGENERON PH Common Stock 75886F107 4 0 1
2019-07-30 2016-12-31 13F/A-1 REGENERON PH Common Stock 75886F107 4 0 0.00 1 0.00 0.0000
2017-02-13 2016-12-31 13F REGENERON PH Common Stock 75886F107 4 4 1
2019-08-07 2016-09-30 13F/A-1 REGENERON PH Common Stock 75886F107 4 -2,716 -99.85 1 -99.89 0.0000
2019-07-29 2016-06-30 13F/A-1 REGENERON PH Common Stock 75886F107 2,720 2,716 67,900.00 949 94,800.00 0.0020
2016-08-15 2016-06-30 13F REGENERON PH Common Stock 75886F107 2,716 2,712 948
2019-07-25 2016-03-31 13F/A-1 REGENERON PH Common Stock 75886F107 4 0 0.00 1 -50.00 0.0000
2019-07-24 2015-12-31 13F/A-1 REGENERON PH Common Stock 75886F107 4 4 2 0.0000
2016-02-12 2015-12-31 13F REGENERON PH Common Stock 75886F107 4 4 2
2019-08-29 2014-12-31 13F/A-3 REGENERON PH Common Stock 75886F107 0 -327 -100.00 0 -100.00
2014-11-07 2014-09-30 13F REGENERON PH Common Stock 75886F107 327 327 117 0.0003
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.