ESSEX INVESTMENT MANAGEMENT CO LLC
Position in MIRM — Mirum Pharmaceuticals, Inc.
CIK 201772
BOSTON, MA
Position in MIRM
as of Mar 31, 2026
· filed May 11, 2026
Position Value
$10,008,264
+$1,215,888 QoQ
Shares Held
108,338
-2.7% QoQ
Ownership
0.178%
of shares outstanding
% of Portfolio
1.59%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Jun 2025
4 quarters on record
Voting authority
Sole 74.12357621517842.ToString("F0")%
Shared 0.ToString("F0")%
None 25.87642378482158.ToString("F0")%
Common Shares in MIRM Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Mar 31, 2026ESSEX INVESTMENT MANAGEMENT CO LLC holds $60,210,603 across 12 Biotechnology names. MIRM ranks #3 (16.6% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | LGND |
Ligand Pharmaceuticals Inc
|
58,460 | $11,671,539 | |
| 2 | INSM |
INSMED Inc
|
62,676 | $10,248,779 | |
| 3 | MIRM |
Mirum Pharmaceuticals, Inc.
This page
|
108,338 | $10,008,264 | |
| 4 | TVTX |
Travere Therapeutics, Inc.
|
161,705 | $4,804,255 | |
| 5 | SNDX |
Syndax Pharmaceuticals Inc
|
198,985 | $4,648,289 | |
| 6 | JAZZ |
Jazz Pharmaceuticals plc
|
21,778 | $4,117,130 | |
| 7 | AGIO |
Agios Pharmaceuticals, Inc.
|
103,177 | $3,490,477 | |
| 8 | ARQT |
Arcutis Biotherapeutics, Inc.
|
143,934 | $3,391,085 |
All Filings in MIRM
Export CSV
4 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $10,008,264 | 108,338 | Shares | Sole | 2026-05-11 | |
| 2025-12-31 | $8,792,376 | 111,310 | Shares | Sole | 2026-02-13 | |
| 2025-09-30 | $8,317,605 | 113,458 | Shares | Sole | 2025-11-06 | |
| 2025-06-30 | $5,736,880 | 112,731 | Shares | Sole | 2025-08-12 | |
| No filing history on record for this holder in this stock. | ||||||