Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionCi Investments Inc.
Latest Disclosed Ownership11,747 shares
Latest Disclosed Value $ 9,076,202
Ci Investments Inc. reports 1.33% increase in ownership of REGN / Regeneron Pharmaceuticals, Inc.

On May 13, 2026 - Ci Investments Inc. filed a 13F-HR form disclosing ownership of 11,747 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $9,076,202 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 11,593 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of 1.33% 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)
2026-05-13 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 11,747 154 1.33 9,076 1.43 0.0309
2026-02-12 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 11,593 6,999 152.35 8,948 447,300.00 0.0392
2025-11-12 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 4,594 343 8.07 3 0.00 0.0094
2025-08-12 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 4,251 -3,487 -45.06 2 -50.00 0.0084
2025-05-13 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 7,738 2,508 47.95 5 33.33 0.0207
2025-02-12 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 5,230 -1,910 -26.75 4 -57.14 0.0140
2024-11-12 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 7,140 1,142 19.04 8 16.67 0.0286
2024-08-12 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 5,998 2,263 60.59 6 100.00 0.0248
2024-05-13 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 3,735 1,334 55.56 4 50.00 0.0143
2024-02-12 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,401 -284 -10.58 2 0.00 0.0109
2023-11-13 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,685 -301 -10.08 2 0.00 0.0123
2023-08-11 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,986 1,075 56.25 2 100.00 0.0108
2023-05-12 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,911 729 61.68 2 0.0079
2023-02-10 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,182 218 22.61 1 -100.00 0.0043
2022-11-14 2022-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 964 100 11.57 664 29.94 0.0034
2022-08-12 2022-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 864 -356 -29.18 511 -40.02 0.0024
2022-05-12 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,220 33 2.78 852 13.60 0.0031
2022-02-11 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,187 83 7.52 750 12.28 0.0026
2021-11-12 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 1,104 386 53.76 668 66.58 0.0025
2021-08-13 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 718 -22 -2.97 401 14.57 0.0015
2021-05-13 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 740 44 6.32 350 4.17 0.0015
2021-02-09 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 696 -44 -5.95 336 -18.84 0.0015
2020-11-09 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 740 282 61.57 414 44.76 0.0021
2020-08-07 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 458 458 286 0.0015
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.