Portolan Capital Management, LLC

13D and 13G Filings

Investors who own more than 5% of a class must file a Schedule 13D or 13G. The latest filing for each security since 12/18/2024, newest first.

Issuer % of Class Filed
Lantronix, Inc. 13G
LTRX · 516548203
 5.2% 10/13/2026
Event 10/6/2026
Silicom Ltd. 13G
SILC · M84116108
 5.1% 9/30/2026
Event 9/23/2026
Real Brokerage Inc 13G/A
REAX · 75585H206
 5.1% 8/14/2026
Event 6/30/2026
Quanterix Corp 13G/A
QTRX · 74766Q101
 4.0% 8/14/2026
Event 6/30/2026
Tecogen Inc. 13G
TGEN · 87876P201
 5.2% 6/10/2026
Event 6/3/2026
Mayville Engineering Company, Inc. 13G
MEC · 578605107
 5.9% 5/28/2026
Event 5/20/2026
Castle Biosciences, Inc. 13G/A
CSTL · 14843C105
 4.5% 5/15/2026
Event 3/31/2026
Vishay Precision Group, Inc. 13G/A
VPG · 92835K103
 8.3% 5/15/2026
Event 3/31/2026
Forrester Research, Inc. 13G/A
FORR · 346563109
 7.9% 5/15/2026
Event 3/31/2026
Domo, Inc. 13G/A
HUCK · 257554105
 0.5% 5/15/2026
Event 3/31/2026
Open Lending Corp 13G
LPRO · 68373J104
 5.9% 2/26/2026
Event 2/19/2026
The Honest Company, Inc. 13G/A
HNST · 438333106
 4.3% 2/17/2026
Event 12/31/2025
Mama's Creations, Inc. 13G/A
MAMA · 56146T103
 3.1% 2/17/2026
Event 12/31/2025
Canada Goose Holdings Inc. 13G
GOOS · 135086106
 6.3% 1/16/2026
Event 1/9/2026
Potbelly Corp 13G
PBPB · 73754Y100
 5.5% 6/27/2025
Event 6/20/2025
GEN Restaurant Group, Inc. 13G/A
GENK · 36870C104
 0% 5/15/2025
Event 3/31/2025
Sportsman's Warehouse Holdings, Inc. 13G/A
SPWH · 84920Y106
 0.6% 5/15/2025
Event 3/31/2025
Orion Group Holdings, Inc. 13G/A
ORN · 68628V308
 1.2% 2/13/2025
Event 12/31/2024