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REGENERON PHARMACEUTICALS, INC.

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13F filer, CIK 872589, TARRYTOWN, NY

REGENERON PHARMACEUTICALS, INC. reported $700,444,832 across 4 holdings for the quarter ended 2025-09-30, in a 13F-HR filed 2025-11-07.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001104659-25-108546

Period
2025-09-30
Reported value
$700M
Holdings
4
Top 10 weight
100%
New
0
Sold out
0

Largest buys vs the previous quarter

None.

Largest sells vs the previous quarter

SecurityShares changeApprox. value
ALNYreduced-3,052,142-$1.39B

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Holdings, Q3 2025

Share positions as resolved from 13F-HR 0001104659-25-108546, largest first. % of portfolio is the value over $700,444,832, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
ALNYALNYLAM PHARMACEUTICALS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not loaded; 2024Q4: 4,444,445 shares; 2025Q1: 4,444,445 shares; 2025Q2: 4,444,445 shares; 2025Q3: 1,392,303 shares 1,392,303$635M90.64%-3,052,142Timeline
NTLAINTELLIA THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not loaded; 2024Q4: 3,702,995 shares; 2025Q1: 3,702,995 shares; 2025Q2: 3,702,995 shares; 2025Q3: 3,702,995 shares 3,702,995$64M9.13%0Timeline
ADVERUM BIOTECHNOLOGIES INCADVERUM BIOTECHNOLOGIES INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not loaded; 2024Q4: 180,909 shares; 2025Q1: 180,909 shares; 2025Q2: 180,909 shares; 2025Q3: 180,909 shares 180,909$820K0.12%0
ADICET BIO INCADICET BIO INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not loaded; 2024Q4: 968,183 shares; 2025Q1: 968,183 shares; 2025Q2: 968,183 shares; 2025Q3: 968,183 shares 968,183$784K0.11%0

How Q3 2025 was built

Available 13F filings of this filer for the quarter and their roles: the base report is the latest original or restatement, NEW HOLDINGS amendments filed after it are added (method).

FilingRoleAmendmentFiledAcceptedIngested
13F-HR 0001104659-25-108546 base2025-11-07acceptance time not in the bulk data set