Mesirow Financial Investment Management, Inc.

Position in REGN — Regeneron Pharmaceuticals, Inc.

CIK 1469475 CHICAGO, IL

Position in REGN

as of Mar 31, 2026 · filed Apr 21, 2026 Compact

Position Value

$1,315,033

+$293,849 QoQ

Shares Held

1,702

+28.6% QoQ

Ownership

0.002%

of shares outstanding

% of Portfolio

0.04%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Dec 2023

10 quarters on record

Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Healthcare · as of Mar 31, 2026

Mesirow Financial Investment Management, Inc. holds $3,816,862 across 11 Biotechnology names. REGN ranks #1 (34.5% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	REGN	Regeneron Pharmaceuticals, Inc. This page	1,702	$1,315,033
2	HALO	Halozyme Therapeutics, Inc.	9,122	$589,554
3	NAMS	NewAmsterdam Pharma Co N.V.	15,430	$493,914
4	IONS	Ionis Pharmaceuticals Inc	5,460	$409,991
5	VRTX	Vertex Pharmaceuticals Inc / Ma	678	$302,754
6	ICCC	Immucell Corp /De/	42,481	$268,904
7	FOLD	AMICUS THERAPEUTICS, INC.	13,000	$187,980
8	CSBR	Champions Oncology, Inc.	15,800	$90,850

10 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
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.