Regeneron Pharmaceuticals, Inc.
US ˙ NasdaqGS ˙ US75886F1075

SecurityREGN / Regeneron Pharmaceuticals, Inc.
InstitutionSquarepoint Ops LLC
Latest Disclosed Ownership162,814 shares
Latest Disclosed Value $ 125,796,609
Squarepoint Ops LLC ownership in REGN / Regeneron Pharmaceuticals, Inc.

On May 15, 2026 - Squarepoint Ops LLC filed a 13F-HR form disclosing ownership of 162,814 shares of Regeneron Pharmaceuticals, Inc. (US:REGN) valued at $125,796,609 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 2,686 shares of Regeneron Pharmaceuticals, Inc.. This represents a change in shares of 5,961.58% during the quarter. The current value of the position is $100,773,725 USD.

Squarepoint Ops 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 10,900 of underlying shares valued at $8,421,776 USD and put options representing 9,200 of underlying shares valued at $7,108,288 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.

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)
2026-05-15 2026-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 162,814 160,128 5,961.58 125,797 5,968.31 0.1478
2026-02-13 2025-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 2,686 -63,585 -95.95 2,073 -94.44 0.0022
2025-11-14 2025-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 66,271 -231,420 -77.74 37,262 -76.16 0.0374
2025-08-27 2025-06-30 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 297,691 13,688 4.82 156,288 -13.23 0.1625
2025-08-14 2025-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 297,691 13,688 156,288 0.1625
2025-08-27 2025-03-31 13F/A-1 REGENERON PHARMACEUTICALS COM 75886F107 284,003 29,424 11.56 180,123 -0.67 0.2186
2025-05-15 2025-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 284,003 29,424 180,123 0.2186
2025-02-14 2024-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 254,579 213,479 519.41 181,344 319.73 0.1789
2024-11-14 2024-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 41,100 38,226 1,330.06 43,206 1,330.63 0.0676
2024-08-14 2024-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 2,874 -2,397 -45.48 3,021 -40.47 0.0050
2024-05-15 2024-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 5,271 -37,892 -87.79 5,073 -86.62 0.0087
2024-02-14 2023-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 43,163 27,596 177.27 37,910 195.91 0.0717
2023-11-14 2023-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 15,567 11,432 276.47 12,811 331.20 0.0316
2023-08-14 2023-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 4,135 -13,402 -76.42 2,971 -79.38 0.0091
2023-05-15 2023-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 17,537 16,737 2,092.12 14,410 2,397.23 0.0587
2023-02-14 2022-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 800 800 577 0.0023
2022-05-16 2022-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 0 -25,927 -100.00 0 -100.00
2022-02-14 2021-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 25,927 -15,060 -36.74 16,373 -33.99 0.0433
2021-11-15 2021-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 40,987 35,504 647.53 24,805 710.09 0.0713
2021-08-16 2021-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 5,483 -37,009 -87.10 3,062 -84.77 0.0116
2021-05-17 2021-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 42,492 11,451 36.89 20,105 34.07 0.1178
2021-02-16 2020-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 31,041 21,587 228.34 14,996 183.37 0.1119
2020-11-16 2020-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 9,454 9,454 5,292 0.0713
2020-08-14 2020-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 0 -9,185 -100.00 0 -100.00
2020-05-15 2020-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 9,185 9,185 4,485 0.1147
2020-02-14 2019-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 0 -52,787 -100.00 0 -100.00
2019-11-14 2019-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 52,787 -4,799 -8.33 14,643 -18.76 0.1307
2019-08-14 2019-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 57,586 9,171 18.94 18,024 -9.34 0.1756
2019-05-15 2019-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 48,415 48,415 19,880 0.2105
2018-08-14 2018-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 0 -11,000 -100.00 0 -100.00
2018-05-15 2018-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 11,000 5,377 95.63 3,788 79.19 0.0602
2018-02-14 2017-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 5,623 -35,422 -86.30 2,114 -88.48 0.0368
2017-11-14 2017-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 41,045 32,791 397.27 18,352 352.69 0.3531
2017-08-14 2017-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 8,254 6,355 334.65 4,054 450.82 0.0798
2017-05-15 2017-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,899 597 45.85 736 53.97 0.0203
2017-02-14 2016-12-31 13F REGENERON PHARMACEUTICALS COM 75886F107 1,302 -3,379 -72.19 478 -74.60 0.0196
2016-11-14 2016-09-30 13F REGENERON PHARMACEUTICALS COM 75886F107 4,681 4,681 0.00 1,882 0.1249
2016-08-15 2016-06-30 13F REGENERON PHARMACEUTICALS COM 75886F107 0 -4,726 -100.00 0 -100.00
2016-05-16 2016-03-31 13F REGENERON PHARMACEUTICALS COM 75886F107 4,726 4,726 1,703 0.1320
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
(%)
2026-05-15 2026-03-31 13F REGENERON PHARMACEUTICALS COM Call 10,900 -61.07 8,422 -61.04 n/a n/a n/a
2026-02-13 2025-12-31 13F REGENERON PHARMACEUTICALS COM Call 28,000 7.69 21,612 47.84 n/a n/a n/a
2025-11-14 2025-09-30 13F REGENERON PHARMACEUTICALS COM Call 26,000 -45.49 14,619 -41.62 n/a n/a n/a
2025-08-27 2025-06-30 13F/A REGENERON PHARMACEUTICALS COM Call 47,700 77.32 25,042 46.79 n/a n/a n/a
2025-08-14 2025-06-30 13F REGENERON PHARMACEUTICALS COM Call 47,700 25,042 n/a n/a n/a
2025-08-27 2025-03-31 13F/A REGENERON PHARMACEUTICALS COM Call 26,900 -49.25 17,061 -54.81 n/a n/a n/a
2025-05-15 2025-03-31 13F REGENERON PHARMACEUTICALS COM Call 26,900 17,061 n/a n/a n/a
2025-02-14 2024-12-31 13F REGENERON PHARMACEUTICALS COM Call 53,000 239.74 37,753 130.22 n/a n/a n/a
2024-11-14 2024-09-30 13F REGENERON PHARMACEUTICALS COM Call 15,600 13.87 16,399 13.89 n/a n/a n/a
2024-08-14 2024-06-30 13F REGENERON PHARMACEUTICALS COM Call 13,700 -29.38 14,399 -22.88 n/a n/a n/a
2024-05-15 2024-03-31 13F REGENERON PHARMACEUTICALS COM Call 19,400 97.96 18,672 116.94 n/a n/a n/a
2024-02-14 2023-12-31 13F REGENERON PHARMACEUTICALS COM Call 9,800 -53.33 8,607 -50.20 n/a n/a n/a
2023-11-14 2023-09-30 13F REGENERON PHARMACEUTICALS COM Call 21,000 -1.41 17,282 12.92 n/a n/a n/a
2023-08-14 2023-06-30 13F REGENERON PHARMACEUTICALS COM Call 21,300 3,450.00 15,305 3,004.26 n/a n/a n/a
2023-05-15 2023-03-31 13F REGENERON PHARMACEUTICALS COM Call 600 -88.00 493 -86.33 n/a n/a n/a
2023-02-14 2022-12-31 13F REGENERON PHARMACEUTICALS COM Call 5,000 0.00 3,607 4.73 n/a n/a n/a
2022-11-14 2022-09-30 13F REGENERON PHARMACEUTICALS COM Call 5,000 -7.41 3,444 7.89 n/a n/a n/a
2022-08-15 2022-06-30 13F REGENERON PHARMACEUTICALS COM Call 5,400 5.88 3,192 -10.39 n/a n/a n/a
2022-05-16 2022-03-31 13F REGENERON PHARMACEUTICALS COM Call 5,100 -39.29 3,562 -32.86 n/a n/a n/a
2022-02-14 2021-12-31 13F REGENERON PHARMACEUTICALS COM Call 8,400 6.33 5,305 10.96 n/a n/a n/a
2021-11-15 2021-09-30 13F REGENERON PHARMACEUTICALS COM Call 7,900 3.95 4,781 12.63 n/a n/a n/a
2021-08-16 2021-06-30 13F REGENERON PHARMACEUTICALS COM Call 7,600 -53.09 4,245 -44.62 n/a n/a n/a
2021-05-17 2021-03-31 13F REGENERON PHARMACEUTICALS COM Call 16,200 113.16 7,665 108.74 n/a n/a n/a
2021-02-16 2020-12-31 13F REGENERON PHARMACEUTICALS COM Call 7,600 3,672 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
(%)
2026-05-15 2026-03-31 13F REGENERON PHARMACEUTICALS COM Put 9,200 26.03 7,108 26.16 n/a n/a n/a
2026-02-13 2025-12-31 13F REGENERON PHARMACEUTICALS COM Put 7,300 12.31 5,635 54.19 n/a n/a n/a
2025-11-14 2025-09-30 13F REGENERON PHARMACEUTICALS COM Put 6,500 -52.21 3,655 -48.82 n/a n/a n/a
2025-08-27 2025-06-30 13F/A REGENERON PHARMACEUTICALS COM Put 13,600 -30.96 7,140 -42.85 n/a n/a n/a
2025-08-14 2025-06-30 13F REGENERON PHARMACEUTICALS COM Put 13,600 7,140 n/a n/a n/a
2025-08-27 2025-03-31 13F/A REGENERON PHARMACEUTICALS COM Put 19,700 -51.95 12,494 -57.22 n/a n/a n/a
2025-05-15 2025-03-31 13F REGENERON PHARMACEUTICALS COM Put 19,700 12,494 n/a n/a n/a
2025-02-14 2024-12-31 13F REGENERON PHARMACEUTICALS COM Put 41,000 162.82 29,206 78.09 n/a n/a n/a
2024-11-14 2024-09-30 13F REGENERON PHARMACEUTICALS COM Put 15,600 1.30 16,399 1.32 n/a n/a n/a
2024-08-14 2024-06-30 13F REGENERON PHARMACEUTICALS COM Put 15,400 -15.38 16,186 -7.60 n/a n/a n/a
2024-05-15 2024-03-31 13F REGENERON PHARMACEUTICALS COM Put 18,200 142.67 17,517 165.93 n/a n/a n/a
2024-02-14 2023-12-31 13F REGENERON PHARMACEUTICALS COM Put 7,500 114.29 6,587 128.72 n/a n/a n/a
2023-11-14 2023-09-30 13F REGENERON PHARMACEUTICALS COM Put 3,500 -18.60 2,880 -6.77 n/a n/a n/a
2023-08-14 2023-06-30 13F REGENERON PHARMACEUTICALS COM Put 4,300 19.44 3,090 4.43 n/a n/a n/a
2023-05-15 2023-03-31 13F REGENERON PHARMACEUTICALS COM Put 3,600 -58.62 2,958 -52.87 n/a n/a n/a
2023-02-14 2022-12-31 13F REGENERON PHARMACEUTICALS COM Put 8,700 4.82 6,277 9.76 n/a n/a n/a
2022-11-14 2022-09-30 13F REGENERON PHARMACEUTICALS COM Put 8,300 -31.40 5,718 -20.06 n/a n/a n/a
2022-08-15 2022-06-30 13F REGENERON PHARMACEUTICALS COM Put 12,100 0.83 7,153 -14.65 n/a n/a n/a
2022-05-16 2022-03-31 13F REGENERON PHARMACEUTICALS COM Put 12,000 84.62 8,381 104.17 n/a n/a n/a
2022-02-14 2021-12-31 13F REGENERON PHARMACEUTICALS COM Put 6,500 22.64 4,105 28.00 n/a n/a n/a
2021-11-15 2021-09-30 13F REGENERON PHARMACEUTICALS COM Put 5,300 6.00 3,207 14.82 n/a n/a n/a
2021-08-16 2021-06-30 13F REGENERON PHARMACEUTICALS COM Put 5,000 -71.91 2,793 -66.84 n/a n/a n/a
2021-05-17 2021-03-31 13F REGENERON PHARMACEUTICALS COM Put 17,800 256.00 8,422 248.59 n/a n/a n/a
2021-02-16 2020-12-31 13F REGENERON PHARMACEUTICALS COM Put 5,000 2,416 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.