Portolan Capital Management LLC - 13D/13G Filings

Real time Form 13D and 13G transaction reports:

  • Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
  • Due to inconsistent filing format, it is highly recommended that you read the orignal filing form.
  • Shares have beem adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
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Time period
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Reported
DateTime
Transaction
Date
TypeCompany
Symbol
Filed By
Symbol
Shares Owned
% Owned
Shares Vs. Prev ReportView
2026-02-26
4:01 pm
Purchase
2026-02-1913GOPEN LENDING CORP COM
LPRO
Portolan Capital Management LLC7,007,120
5.930%
7,007,120increase
(New Position)
Filing
History
2026-02-19
5:43 pm
Purchase
2026-02-1113GFORRESTER RESEARCH INC
FORR
Portolan Capital Management LLC1,163,008
6.120%
1,163,008increase
(New Position)
Filing
History
2026-02-17
3:51 pm
Sale
2025-12-3113GHONEST CO INC
HNST
Portolan Capital Management LLC4,804,206
4.300%
-554,795decrease
(-10.35%)
Filing
History
2026-02-17
3:48 pm
Sale
2025-12-3113GMAMAS CREATIONS, INC.
MAMA
Portolan Capital Management LLC1,245,767
3.060%
-725,270decrease
(-36.80%)
Filing
History
2026-02-17
3:47 pm
Sale
2025-12-3113GDOMO INC CLASS B
DOMO
Portolan Capital Management LLC2,158,770
5.600%
-525,983decrease
(-19.59%)
Filing
History
2026-01-16
4:04 pm
Purchase
2026-01-0913GCANADA GOOSE HLDGS INC SHS SUB
GOOS
Portolan Capital Management LLC2,905,370
6.310%
2,905,370increase
(New Position)
Filing
History
2026-01-08
6:51 pm
Purchase
2025-12-3113GREAL BROKERAGE INC
REAX
Portolan Capital Management LLC11,296,427
5.360%
11,296,427increase
(New Position)
Filing
History
2025-11-13
4:04 pm
Purchase
2025-09-3013GDOMO INC CLASS B
DOMO
Portolan Capital Management LLC2,684,753
7.070%
389,406increase
(+16.97%)
Filing
History
2025-11-13
4:03 pm
Sale
2025-09-3013GVISHAY PRECISION GROUP, INC CO
VPG
Portolan Capital Management LLC823,298
6.720%
-167,141decrease
(-16.88%)
Filing
History
2025-09-17
6:10 pm
Purchase
2025-09-1013GDOMO INC CLASS B
DOMO
Portolan Capital Management LLC2,295,347
6.050%
2,295,347increase
(New Position)
Filing
History
2025-08-13
4:10 pm
Purchase
2025-06-3013GQUANTERIX CORP COM
QTRX
Portolan Capital Management LLC3,633,622
9.360%
670,225increase
(+22.62%)
Filing
History
2025-08-13
4:05 pm
Purchase
2025-06-3013GVISHAY PRECISION GROUP, INC CO
VPG
Portolan Capital Management LLC990,439
8.100%
219,676increase
(+28.50%)
Filing
History
2025-06-27
5:16 pm
Purchase
2025-06-2013GPOTBELLY CORP
PBPB
Portolan Capital Management LLC1,667,702
5.530%
1,667,702increase
(New Position)
Filing
History
2025-05-15
11:29 am
Purchase
2025-03-3113GQUANTERIX CORP COM
QTRX
Portolan Capital Management LLC2,963,397
7.640%
442,711increase
(+17.56%)
Filing
History
2025-05-15
11:25 am
Sale
2025-03-3113GGEN RESTAURANT GROUP INC
GENK
Portolan Capital Management LLC0
0.000%
-283,774decrease
(Position Closed)
Filing
History
2025-05-15
11:21 am
Sale
2025-03-3113GSPORTSMAN'S WAREHOUSE HOLDINGS
SPWH
Portolan Capital Management LLC237,334
0.620%
-1,735,025decrease
(-87.97%)
Filing
History
2025-04-14
3:34 pm
Purchase
2025-04-0713GCASTLE BIOSCIENCES INC
CSTL
Portolan Capital Management LLC1,611,099
5.650%
1,611,099increase
(New Position)
Filing
History
2025-04-11
1:26 pm
Purchase
2025-04-0413GMAMAS CREATIONS, INC.
MAMA
Portolan Capital Management LLC1,971,037
5.240%
1,971,037increase
(New Position)
Filing
History
2025-02-13
4:44 pm
Sale
2024-12-3113GORION GROUP HLDGS INC
ORN
Portolan Capital Management LLC448,691
1.150%
-1,357,884decrease
(-75.16%)
Filing
History
2025-02-13
4:43 pm
Sale
2024-12-3113GGEN RESTAURANT GROUP INC
GENK
Portolan Capital Management LLC283,774
5.780%
-88,985decrease
(-23.87%)
Filing
History
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