Mesirow Financial Investment Management, Inc.
Position in IONS — Ionis Pharmaceuticals Inc
CIK 1469475
CHICAGO, IL
Position in IONS
as of Mar 31, 2026
· filed Apr 21, 2026
Position Value
$409,991
New position
Shares Held
5,460
first reported quarter
Ownership
0.003%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2026
1 quarter on record
Voting authority
Sole 100.ToString("F0")%
Shared 0.ToString("F0")%
None 0.ToString("F0")%
Position in Biotechnology
Healthcare · as of Mar 31, 2026Mesirow Financial Investment Management, Inc. holds $3,816,862 across 11 Biotechnology names. IONS ranks #4 (10.7% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | REGN |
Regeneron Pharmaceuticals, Inc.
|
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
This page
|
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 |
All Filings in IONS
Export CSV
1 filing row on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $409,991 | 5,460 | Shares | Sole | 2026-04-21 | |
| No filing history on record for this holder in this stock. | ||||||