Regeneron Pharmaceuticals, Inc.
MX ˙ BMV ˙ US75886F1075
SecurityMX:REGN / Regeneron Pharmaceuticals, Inc.
InstitutionArkadios Wealth Advisors
Latest Disclosed Ownership4,435 shares
Latest Disclosed Value $ 3,426,360
Arkadios Wealth Advisors ownership in REGN / Regeneron Pharmaceuticals, Inc.

On May 18, 2026 - Arkadios Wealth Advisors filed a 13F-HR form disclosing ownership of 4,435 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN) valued at $3,426,360 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 3,251 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of 36.42% during the quarter.

Arkadios Wealth Advisors 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 1,300 of underlying shares valued at $1,004,432 USD and put 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)
2026-05-18 2026-03-31 13F REGENERON PHARMACEUTICALS COM Stock 75886F107 4,435 1,184 36.42 3,426 36.55 0.0361
2026-02-13 2025-12-31 13F REGENERON PHARMACEUTICALS COM Stock 75886F107 3,251 1,251 62.55 2,509 123.22 0.0487
2025-10-29 2025-09-30 13F REGENERON PHARMACEUTICALS COM Stock 75886F107 2,000 -40 -1.96 1,125 4.95 0.0270
2025-08-04 2025-06-30 13F REGENERON PHARMACEUTICALS COM Stock 75886F107 2,040 1,631 398.78 1,071 313.51 0.0316
2025-05-08 2025-03-31 13F REGENERON PHARMACEUTICALS COM Stock 75886F107 409 409 259 0.0098
2024-10-24 2024-09-30 13F REGENERON PHARMACEUTICALS COM Stock 75886F107 0 -202 -100.00 0 -100.00
2024-07-29 2024-06-30 13F REGENERON PHARMACEUTICALS COM Stock 75886F107 202 202 212 0.0143
2022-02-03 2021-12-31 13F REGENERON PHARMACEUTICALS COM Stock 75886F107 0 -56 -100.00 0 0.0000
2021-10-19 2021-09-30 13F REGENERON PHARMACEUTICALS COM Stock 75886F107 56 -1 -1.75 0 0.0048
2021-07-28 2021-06-30 13F REGENERON PHARMACEUTICALS COM Stock 75886F107 57 28 96.55 0 0.0038
2021-04-26 2021-03-31 13F REGENERON PHARMACEUTICALS COM Stock 75886F107 29 24 480.00 0 0.0021
2021-02-09 2020-12-31 13F REGENERON PHARMACEUTICALS COM Stock 75886F107 5 -11 -68.75 0 -100.00 0.0004
2020-11-10 2020-09-30 13F REGENERON PHARMACEUTICALS COM Common Stock 75886F107 16 0 0.00 10 -10.00 0.0048
2020-08-10 2020-06-30 13F REGENERON PHARMACEUTICALS COM Common Stock 75886F107 16 0 0.00 10 42.86 0.0057
2020-05-14 2020-03-31 13F REGENERON PHARMACEUTICALS COM Common Stock 75886F107 16 16 8 0.0050
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
(%)
2026-05-18 2026-03-31 13F REGENERON PHARMACEUTICALS COM Stock Call 1,300 225.00 1,004 225.97 n/a n/a n/a
2026-02-13 2025-12-31 13F REGENERON PHARMACEUTICALS COM Stock Call 400 309 n/a n/a n/a
Disclosed Put 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
(%)
2026-05-18 2026-03-31 13F REGENERON PHARMACEUTICALS COM Stock Put 0 -100.00 0 -100.00 n/a n/a n/a
2026-02-13 2025-12-31 13F REGENERON PHARMACEUTICALS COM Stock Put 100 77 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.