Capital World Investors ownership in REGN / Regeneron Pharmaceuticals, Inc.

Regeneron Pharmaceuticals, Inc.

MX ˙ BMV ˙ US75886F1075

Security	MX:REGN / Regeneron Pharmaceuticals, Inc.
Institution	Capital World Investors
Latest Disclosed Ownership	5,194,729 shares
Ownership	4.80%

2024-02-09 - Capital World Investors has filed an SC 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 5,194,729 shares of Regeneron Pharmaceuticals, Inc. (MX:REGN). This represents 4.8 percent ownership of the company. In their previous filing dated 2023-02-13 , Capital World Investors had reported owning 6,315,819 shares, indicating a decrease of -17.75 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File Date	Effective Date	Form	Prev Shares	Latest Shares	ΔShares (Percent)	Ownership (Percent)	ΔOwnership (Percent)
2024-02-09	2024-02-09	13G/A	6,315,819	5,194,729	-17.75	4.80	-18.64
2023-02-13	2023-02-13	13G/A	5,391,870	6,315,819	17.14	5.90	15.69
2022-02-11	2022-02-11	13G/A	7,017,122	5,391,870	-23.16	5.10	-23.88
2021-02-16	2021-02-16	13G/A	8,351,951	7,017,122	-15.98	6.70	-12.99
2020-02-14	2020-02-14	13G/A	7,041,190	8,351,951	18.62	7.70	16.67
2019-02-14	2019-02-14	13G	7,041,190	7,041,190	0.00	6.60	0.00
2019-02-13	2019-02-13	13G	4,816,614	7,041,190	46.19	6.60	46.67
2018-02-14	2018-02-14	13G/A	7,759,325	4,816,614	-37.92	4.50	-39.19
2017-02-13	2017-02-13	13G/A	6,804,465	7,759,325	14.03	7.40	12.12
2016-02-16	2016-02-16	13G/A		6,804,465		6.60
2015-02-13	2015-02-13	13G/A		7,876,150		7.90
2014-02-13	2014-02-13	13G/A		8,863,930		9.10
2013-02-13	2013-02-13	13G/A		9,023,420		9.60
2012-02-10	2012-02-10	13G/A		10,730,563		11.90

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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	Reported Shares	ΔShares	ΔShares (%)	Reported Value (x1000)	ΔValue (%)	Alloc (%)
2026-05-13	2026-03-31	13F	REGENERON PHARMACEUTICALS	COM	75886F107	1,419,000	20,997	1.50	1,096,376	1.60	0.1496
2026-02-11	2025-12-31	13F	REGENERON PHARMACEUTICALS	COM	75886F107	1,398,003	-600,363	-30.04	1,079,077	-3.96	0.1468
2025-11-13	2025-09-30	13F	REGENERON PHARMACEUTICALS	COM	75886F107	1,998,366	32,348	1.65	1,123,609	8.86	0.1535
2025-08-13	2025-06-30	13F	REGENERON PHARMACEUTICALS	COM	75886F107	1,966,018	27,384	1.41	1,032,130	-16.06	0.1500
2025-05-12	2025-03-31	13F	REGENERON PHARMACEUTICALS	COM	75886F107	1,938,634	-840,346	-30.24	1,229,563	-37.88	0.1992
2025-02-13	2024-12-31	13F	REGENERON PHARMACEUTICALS	COM	75886F107	2,778,980	-1,519,407	-35.35	1,979,491	-56.19	0.3005
2024-11-13	2024-09-30	13F	REGENERON PHARMACEUTICALS	COM	75886F107	4,298,387	-340,280	-7.34	4,518,578	-7.32	0.7005
2024-08-13	2024-06-30	13F	REGENERON PHARMACEUTICALS	COM	75886F107	4,638,667	-16,188	-0.35	4,875,377	8.82	0.7950
2024-05-14	2024-03-31	13F	REGENERON PHARMACEUTICALS	COM	75886F107	4,654,855	-475,630	-9.27	4,480,252	-0.57	0.7415
2024-02-13	2023-12-31	13F	REGENERON PHARMACEUTICALS	COM	75886F107	5,130,485	23,146	0.45	4,506,071	7.21	0.8014
2023-11-13	2023-09-30	13F	REGENERON PHARMACEUTICALS	COM	75886F107	5,107,339	-443,043	-7.98	4,203,196	5.39	0.8326
2023-08-11	2023-06-30	13F	REGENERON PHARMACEUTICALS	COM	75886F107	5,550,382	-280,204	-4.81	3,988,120	-16.75	0.7671
2023-05-15	2023-03-31	13F	REGENERON PHARMACEUTICALS	COM	75886F107	5,830,586	-411,849	-6.60	4,790,765	6.37	0.9903
2023-02-14	2022-12-31	13F	REGENERON PHARMACEUTICALS	COM	75886F107	6,242,435	16,836	0.27	4,503,853	5.02	0.9601
2022-11-14	2022-09-30	13F	REGENERON PHARMACEUTICALS	COM	75886F107	6,225,599	-9,012	-0.14	4,288,644	16.37	0.9629
2022-08-15	2022-06-30	13F	REGENERON PHARMACEUTICALS	COM	75886F107	6,234,611	284,777	4.79	3,685,500	-11.31	0.7830
2022-05-19	2022-03-31	13F/A-1	REGENERON PHARMACEUTICALS	COM	75886F107	5,949,834	626,199	11.76	4,155,451	23.60	0.7155
2022-05-16	2022-03-31	13F	REGENERON PHARMACEUTICALS	COM	75886F107	5,949,834	626,199		4,155,451		0.7256
2022-02-14	2021-12-31	13F	REGENERON PHARMACEUTICALS	COM	75886F107	5,323,635	3,635	0.07	3,362,037	4.43	0.5318
2021-11-15	2021-09-30	13F	REGENERON PHARMACEUTICALS	COM	75886F107	5,320,000	12,043	0.23	3,219,565	8.60	0.5496
2021-08-16	2021-06-30	13F	REGENERON PHARMACEUTICALS	COM	75886F107	5,307,957	-876,163	-14.17	2,964,661	1.32	0.5038
2021-05-14	2021-03-31	13F	REGENERON PHARMACEUTICALS	COM	75886F107	6,184,120	-761,648	-10.97	2,925,946	-12.80	0.5408
2021-02-12	2020-12-31	13F	REGENERON PHARMACEUTICALS	COM	75886F107	6,945,768	301,398	4.54	3,355,556	-9.78	0.6466
2020-11-13	2020-09-30	13F	REGENERON PHARMACEUTICALS	COM	75886F107	6,644,370	-290,985	-4.20	3,719,415	-14.01	0.8140
2020-08-14	2020-06-30	13F	REGENERON PHARMACEUTICALS	COM	75886F107	6,935,355	-197,925	-2.77	4,325,216	24.18	1.0466
2020-05-15	2020-03-31	13F	REGENERON PHARMACEUTICALS	COMMON STOCK	75886F107	7,133,280	-1,199,144	-14.39	3,483,098	11.33	1.0107
2020-02-18	2019-12-31	13F	REGENERON PHARMACEUTICALS	COMMON STOCK	75886F107	8,332,424	125,777	1.53	3,128,658	37.43	0.6993
2019-11-14	2019-09-30	13F	REGENERON PHARMACEUTICALS	COMMON STOCK	75886F107	8,206,647	106,813	1.32	2,276,523	-10.21	0.5483
2019-08-14	2019-06-30	13F	REGENERON PHARMACEUTICALS	COMMON STOCK	75886F107	8,099,834	608,166	8.12	2,535,248	-17.59	0.5947
2019-05-15	2019-03-31	13F	REGENERON PHARMACEUTICALS	COMMON STOCK	75886F107	7,491,668	462,477	6.58	3,076,229	17.17	0.7460
2019-02-14	2018-12-31	13F	REGENERON PHARMACEUTICALS	COMMON STOCK	75886F107	7,029,191	644,868	10.10	2,625,403	1.78	0.7113
2018-11-14	2018-09-30	13F	REGENERON PHARMACEUTICALS	COMMON STOCK	75886F107	6,384,323	322,051	5.31	2,579,522	23.34	0.6275
2018-08-14	2018-06-30	13F	REGENERON PHARMACEUTICALS	COMMON STOCK	75886F107	6,062,272	1,363,384	29.02	2,091,423	29.25	0.4476
2018-05-15	2018-03-31	13F	REGENERON PHARMACEUTICALS	COMMON STOCK	75886F107	4,698,888	-109,059	-2.27	1,618,109	-10.48	0.3643
2018-02-14	2017-12-31	13F	REGENERON PHARMACEUTICALS	COMMON STOCK	75886F107	4,807,947	-1,759,869	-26.80	1,807,596	-38.45	0.3919
2017-11-14	2017-09-30	13F	REGENERON PHARMACEUTICALS	COMMON STOCK	75886F107	6,567,816	-370,047	-5.33	2,936,602	-13.82	0.6652
2017-08-14	2017-06-30	13F	REGENERON PHARMACEUTICALS	COMMON STOCK	75886F107	6,937,863	-147,658	-2.08	3,407,462	24.10	0.8003
2017-05-15	2017-03-31	13F	REGENERON PHARMACEUTICALS	COMMON STOCK	75886F107	7,085,521	-673,804	-8.68	2,745,710	-3.60	0.6564
2017-02-15	2016-12-31	13F	REGENERON PHARMACEUTICALS	COMMON STOCK	75886F107	7,759,325	-51,213	-0.66	2,848,371	-9.29	0.7164
2016-11-14	2016-09-30	13F	REGENERON PHARMACEUTICALS	COMMON STOCK	75886F107	7,810,538	483,912	6.60	3,139,992	22.72	0.8165
2016-08-15	2016-06-30	13F	REGENERON PHARMACEUTICALS	COMMON STOCK	75886F107	7,326,626	312,008	4.45	2,558,678	1.20	0.6900
2016-05-16	2016-03-31	13F	REGENERON PHARMACEUTICALS	COMMON STOCK	75886F107	7,014,618	210,153	3.09	2,528,349	-31.55	0.6986
2016-02-12	2015-12-31	13F	REGENERON PHARMACEUTICALS	COMMON STOCK	75886F107	6,804,465	-168,116	-2.41	3,693,940	13.90	1.0334
2015-11-16	2015-09-30	13F	REGENERON PHARMACEUTICALS	COMMON STOCK	75886F107	6,972,581	-986,741	-12.40	3,243,226	-20.12	0.9538
2015-08-14	2015-06-30	13F	REGENERON PHARMACEUTICALS	COMMON STOCK	75886F107	7,959,322	-104,854	-1.30	4,060,289	11.52	1.1063
2015-05-15	2015-03-31	13F	REGENERON PHARMACEUTICALS	COMMON STOCK	75886F107	8,064,176	188,026	2.39	3,640,814	12.68	0.9813
2015-03-02	2014-12-31	13F/A-1	REGENERON PHARMACEUTICALS	COMMON STOCK	75886F107	7,876,150	490,450	6.64	3,231,191	21.35	0.8863
2015-02-13	2014-12-31	13F	REGENERON PHARMACEUTICALS	COMMON STOCK	75886F107	8,070,150			3,362,509
2014-11-14	2014-09-30	13F	REGENERON PHARMACEUTICALS	COMMON STOCK	75886F107	7,385,700	35,641	0.48	2,662,693	28.25	0.7480
2014-08-14	2014-06-30	13F	REGENERON PHARMACEUTICALS	COMMON STOCK	75886F107	7,350,059	-282,962	-3.71	2,076,171	-9.42	0.5721
2014-05-15	2014-03-31	13F	REGENERON PHARMACEUTICALS	COMMON STOCK	75886F107	7,633,021	-1,230,909	-13.89	2,292,044	-6.05	0.6533
2014-02-14	2013-12-31	13F	REGENERON PHARMACEUTICALS	COMMON STOCK	75886F107	8,863,930	-204,999	-2.26	2,439,708	-14.02	0.6859
2013-11-14	2013-09-30	13F	REGENERON PHARMACEUTICALS	COMMON STOCK	75886F107	9,068,929	539,200	6.32	2,837,396	47.92	0.8616
2013-08-14	2013-06-30	13F	REGENERON PHARMACEUTICALS	COMMON STOCK	75886F107	8,529,729	8,529,729		1,918,166		0.6218

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.