Question 1

How many shares of REGN does LOOMIS SAYLES & CO L P own?

Accepted Answer

As of 2026-Q1, LOOMIS SAYLES & CO L P holds 1.9M shares of REGN (REGENERON PHARMACEUTICALS).

Question 2

What is LOOMIS SAYLES & CO L P's REGN position worth?

Accepted Answer

As of 2026-Q1, LOOMIS SAYLES & CO L P's REGN position is worth $1.5B.

Question 3

Is LOOMIS SAYLES & CO L P buying or selling REGN?

Accepted Answer

In 2026-Q1, LOOMIS SAYLES & CO L P decreased their REGN position (-1.1% change in shares).

Question 4

When did LOOMIS SAYLES & CO L P first buy REGN?

Accepted Answer

Based on available 13F filings, LOOMIS SAYLES & CO L P first reported a position in REGN in 2024-Q2. They have held the position across 30 quarters.

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q1 Latest	Decreased	1.9M	-1.1%	$1.5B	2.0%	$766.66	0
2025-Q4	Decreased	1.9M	-2.3%	$1.5B	1.8%	$773.94	0
2025-Q3	Increased	2M	+2.0%	$1.1B	1.3%	$560.05	51
2025-Q2	Increased	1.9M	+18.6%	$1B	1.3%	$519.56	59
2025-Q1	Increased	1.6M	+3.9%	$1B	1.5%	$634.66	52
2024-Q4	Increased	1.6M	+33.4%	$1.1B	1.4%	$698.71	65
2024-Q3	Decreased	1.2M	-2.9%	$1.2B	1.6%	$1,036.94	0
2024-Q2	Increased	1.2M	+0.8%	$1.3B	1.8%	$1,045.23	51

REGNShowing 8 of 30 quarters

REGN
Showing 8 of 30 quarters