Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionWealth Enhancement Advisory Services, Llc
Latest Disclosed Ownership37,596 shares
Latest Disclosed Value $ 21,005,571
Wealth Enhancement Advisory Services, Llc ownership in REGN / Regeneron Pharmaceuticals, Inc.

On April 8, 2026 - Wealth Enhancement Advisory Services, Llc filed a 13F-HR form disclosing ownership of 37,596 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $21,005,571 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 8, 2026 disclosing 22,363 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of 68.12% during the quarter.

Wealth Enhancement Advisory Services, Llc has a history of taking positions in derivatives of the underlying security (REGN) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:REGN / Regeneron Pharmaceuticals, Inc. Historical Put/Call Ratio
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)
2026-04-08 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 37,596 15,233 68.12 21,006 19.79 0.0428
2026-01-08 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 22,363 4,778 27.17 17,536 70.97 0.0238
2025-10-29 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 17,585 7,923 82.00 10,256 93.95 0.0155
2025-07-10 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 9,662 -24,083 -71.37 5,288 -75.29 0.0087
2025-04-16 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 33,745 -12,246 -26.63 21,403 -34.67 0.0409
2025-03-17 2024-12-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 45,991 14,997 48.39 32,760 0.55 0.0627
2025-01-10 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 30,914 -80 32,498 0.0657
2024-10-24 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 30,994 7,360 31.14 32,582 31.17 0.0700
2024-07-16 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 23,634 483 2.09 24,840 11.48 0.0590
2024-04-15 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 23,151 2,412 11.63 22,283 22.33 0.0576
2024-01-30 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 20,739 2,620 14.46 18,215 22.16 0.0529
2023-11-13 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 18,119 13,248 271.98 14,911 326.00 0.0490
2023-07-21 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 4,871 488 11.13 3,500 -2.80 0.0377
2023-04-25 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 4,383 235 5.67 3,601 17.87 0.0419
2023-02-01 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 4,148 4,148 3,055 0.0393
2019-11-05 2019-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 0 -5,173 -100.00 0 -100.00
2019-08-02 2019-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 5,173 2,645 104.63 1,583 81.95 0.0698
2019-04-30 2019-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,528 2,528 870 0.0492
2017-07-26 2017-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 0 -3,001 -100.00 0 -100.00
2017-04-18 2017-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 3,001 916 43.93 1,161 51.57 0.1233
2017-01-31 2016-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,085 -498 -19.28 766 -24.46 0.0930
2016-11-09 2016-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,583 2,583 1,014 0.1511
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2025-04-16 2025-03-31 13F REGENERON PHARMACEUTICALS COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-01-10 2024-12-31 13F REGENERON PHARMACEUTICALS COM Call 900 0.00 71 0.00 n/a n/a n/a
2024-10-24 2024-09-30 13F REGENERON PHARMACEUTICALS COM Call 900 71 n/a n/a n/a
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.