Mesirow Financial Investment Management, Inc.

Position in REGN — Regeneron Pharmaceuticals, Inc.

CIK 1469475 CHICAGO, IL

Position in REGN

as of Jun 30, 2026 · filed Jul 22, 2026 Compact

Position Value

$979,581

-$335,452 QoQ

Shares Held

1,571

-7.7% QoQ

Ownership

0.002%

of shares outstanding

% of Portfolio

0.03%

of 13F equity value

Holder Rank

#647

of 1,322 holders

Holding Since

Dec 2023

11 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Healthcare · as of Jun 30, 2026

Mesirow Financial Investment Management, Inc. holds $3,138,903 across 10 Biotechnology names. REGN ranks #1 (31.2% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	REGN	Regeneron Pharmaceuticals, Inc. This page	1,571	$979,581
2	HALO	Halozyme Therapeutics, Inc.	9,482	$742,156
3	ICCC	Immucell Corp /De/	42,481	$426,934
4	VRTX	Vertex Pharmaceuticals Inc / Ma	628	$311,946
5	NAMS	NewAmsterdam Pharma Co N.V.	7,465	$252,988
6	IONS	Ionis Pharmaceuticals Inc	2,530	$200,603
7	CSBR	Champions Oncology, Inc.	15,800	$97,328
8	INTS	Intensity Therapeutics, Inc.	14,118	$57,883

11 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$979,581	1,571	-7.7%	Shares	Sole	2026-07-22
2026-03-31	$1,315,033	1,702	+28.6%	Shares	Sole	2026-04-21
2025-12-31	$1,021,184	1,323	-32.2%	Shares	Sole	2026-02-05
2025-09-30	$1,096,988	1,951	-15.3%	Shares	Sole	2025-11-12
2025-06-30	$1,209,075	2,303	-9.2%	Shares	Sole	2025-08-04
2025-03-31	$1,609,041	2,537	-2.0%	Shares	Sole	2025-05-08
2024-12-31	$1,844,934	2,590	-0.8%	Shares	Sole	2025-02-07
2024-09-30	$2,743,736	2,610	-0.5%	Shares	Sole	2024-11-01
2024-06-30	$2,757,902	2,624	-2.7%	Shares	Sole	2024-08-09
2024-03-31	$2,595,835	2,697	+5.2%	Shares	Sole	2024-04-25
2023-12-31	$2,251,935	2,564	—	Shares	Sole	2024-02-13
No filing history on record for this holder in this stock.