Investor Portolan Capital Management, LLC
13D/G Filings

This page shows a list of all the recent 13D/G filings made by Portolan Capital Management, LLC . Schedule 13D is commonly referred to as a “beneficial ownership report.” The term "beneficial owner" is defined under SEC rules. It includes any person who directly or indirectly shares voting power or investment power (the power to sell the security).

When a person or group of persons acquires beneficial ownership of more than 5% of a voting class of a company’s equity securities, they are required to file a Schedule 13D within ten days after the purchase. Click the link icon to see the full transaction history.

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Date Form Target Prev
Shares		 Current
Shares		 Change
(Percent)		 Ownership
(Percent)		 Change
(Percent)
2026-05-28 13G MEC / Mayville Engineering Company, Inc. 1,465,004
2026-05-15 13G/A VPG / Vishay Precision Group, Inc. 823,298 1,019,868
2026-05-15 13G/A CSTL / Castle Biosciences, Inc. 1,611,099 1,350,283
2026-05-15 13G/A REAX / The Real Brokerage Inc. 11,296,427 14,519,848
2026-05-15 13G/A QTRX / Quanterix Corporation 3,633,622 2,945,823
2026-05-15 13G/A FORR / Forrester Research, Inc. 1,163,008 1,541,276
2026-05-15 13G/A DOMO / Domo, Inc. 2,158,770 197,104
2026-02-26 13G LPRO / Open Lending Corporation 7,007,120
2026-02-19 13G FORR / Forrester Research, Inc. 1,163,008
2026-02-17 13G/A HNST / The Honest Company, Inc. 5,359,001 4,804,206
2026-02-17 13G/A MAMA / Mama's Creations, Inc. 1,971,037 1,245,767
2026-02-17 13G/A DOMO / Domo, Inc. 2,684,753 2,158,770
2026-01-16 13G GOOS / Canada Goose Holdings Inc. 2,905,370
2026-01-08 13G REAX / The Real Brokerage Inc. 11,296,427
2025-11-13 13G/A DOMO / Domo, Inc. 2,295,347 2,684,753
2025-11-13 13G/A VPG / Vishay Precision Group, Inc. 990,439 823,298
2025-09-17 13G DOMO / Domo, Inc. 2,295,347
2025-08-13 13G/A QTRX / Quanterix Corporation 2,963,397 3,633,622
2025-08-13 13G/A VPG / Vishay Precision Group, Inc. 770,763 990,439
2025-06-27 13G PBPB / Potbelly Corporation 1,667,702
2025-05-15 13G/A QTRX / Quanterix Corporation 2,520,686 2,963,397
2025-05-15 13G/A GENK / GEN Restaurant Group, Inc. 283,774 0
2025-05-15 13G/A SPWH / Sportsman's Warehouse Holdings, Inc. 1,972,359 237,334
2025-04-14 13G CSTL / Castle Biosciences, Inc. 1,611,099
2025-04-11 13G MAMA / Mama's Creations, Inc. 1,971,037
2025-02-13 13G/A ORN / Orion Group Holdings, Inc. 1,806,575 448,691
2025-02-13 13G/A GENK / GEN Restaurant Group, Inc. 372,759 283,774
2025-02-13 13G/A HNST / The Honest Company, Inc. 7,556,985 5,359,001
2025-02-06 13G VPG / Vishay Precision Group, Inc. 770,763
2024-11-13 13G/A GENK / GEN Restaurant Group, Inc. 275,618 372,759
2024-11-13 13G/A QTRX / Quanterix Corporation 1,918,030 2,520,686
2024-11-13 13G/A INVE / Identiv, Inc. 1,284,375 1,008,220
2024-11-06 13G SPWH / Sportsman's Warehouse Holdings, Inc. 1,972,359
2024-07-22 13G ORN / Orion Group Holdings, Inc. 1,806,575
2024-06-27 13G QTRX / Quanterix Corporation 1,918,030
2024-03-14 13G INVE / Identiv, Inc. 907,468 1,284,375
2024-02-14 13G/A KRUS / Kura Sushi USA, Inc. 470,007 74,917
2024-02-14 13G/A INVE / Identiv, Inc. 2,126,211 907,468
2024-02-14 13G/A PRCH / Porch Group, Inc. 6,341,098 3,200,183
2024-02-14 13G/A HNST / The Honest Company, Inc. 5,197,721 7,556,985
2024-02-14 13G/A EMKR / Emcore Corporation 3,113,335 0
2024-02-14 13G/A BELFB / Bel Fuse Inc. 531,577 190,512
2023-12-18 13G GENK / GEN Restaurant Group, Inc. 275,618
2023-04-13 13G HNST / The Honest Company, Inc. 5,197,721
2023-03-24 13G EMKR / Emcore Corporation 673,364 3,113,335
2023-03-10 13G BELFB / Bel Fuse Inc. 531,577
2023-02-13 13G/A INVE / Identiv, Inc. 1,743,498 2,126,211
2023-02-13 13G/A RELL / Richardson Electronics, Ltd. 718,880 484,632
2023-02-13 13G/A ALTG / Alta Equipment Group Inc. 1,635,241 572,246
2023-02-13 13G/A FLL / Full House Resorts, Inc. 1,838,714 407,452
2023-02-13 13G/A PRCH / Porch Group, Inc. 5,904,286 6,341,098
2023-02-13 13G/A LTRX / Lantronix, Inc. 1,979,669 691,118
2023-02-13 13G/A HBIO / Harvard Bioscience, Inc. 2,538,799 1,054,300
2023-02-13 13G/A CHRA / Charah Solutions Inc 1,782,052 166,819
2023-01-20 13G KRUS / Kura Sushi USA, Inc. 470,007
2022-12-05 13G PRCH / Porch Group, Inc. 2,984,922 5,904,286
2022-11-22 13G/A CHRA / Charah Solutions Inc 3,508,947 1,782,052
2022-08-15 13G RELL / Richardson Electronics, Ltd. 718,880
2022-05-27 13G LTRX / Lantronix, Inc. 1,979,669
2022-02-15 13G AGTC / Applied Genetic Technologies Corp 1,360,704 2,218,188
2022-02-11 13G/A AGTC / Applied Genetic Technologies Corp 1,307,727 1,360,704
2022-02-11 13G/A BMTX / BM Technologies, Inc. 911,902 264,025
2022-02-11 13G/A BXC / BlueLinx Holdings Inc. 493,386 451,793
2022-02-11 13G/A AMTX / Aemetis, Inc. 1,485,599 106,090
2022-02-11 13G/A ICAD / iCAD, Inc. 1,161,199 0
2022-02-11 13G/A FLL / Full House Resorts, Inc. 2,179,408 1,838,714
2022-02-11 13G/A HBIO / Harvard Bioscience, Inc. 2,065,645 2,538,799
2022-02-11 13G/A WTRH / Waitr Holdings Inc 5,891,646 0
2022-02-11 13G/A YELL / Yellow Corporation 2,786,969 1,251,403
2022-02-11 13G/A DXLG / Destination XL Group, Inc. 3,158,956 1,161,668
2022-02-11 13G/A TA / TravelCenters of America Inc 810,195 615,462
2022-02-11 13G/A QUMU / Qumu Corp 893,469 0
2022-02-11 13G/A REPH / Societal CDMO Inc 1,293,376 0
2022-02-11 13G/A NOTV / Inotiv, Inc. 842,274 728,395
2022-02-11 13G/A PFSW / PFSWEB Inc 1,443,113 28,504
2022-02-11 13G/A INVE / Identiv, Inc. 1,649,808 1,743,498
2022-02-04 13G ALTG / Alta Equipment Group Inc. 1,635,241
2022-01-06 13G/A CHRA / Charah Solutions Inc 2,978,524 3,508,947
2021-10-21 13G NOTV / Inotiv, Inc. 842,274
2021-09-03 13G HBIO / Harvard Bioscience, Inc. 2,065,645
2021-07-09 13G WTRH / Waitr Holdings Inc 5,891,646
2021-07-09 13G BXC / BlueLinx Holdings Inc. 493,386
2021-06-11 13G QUMU / Qumu Corp 893,469
2021-05-10 13G FLL / Full House Resorts, Inc. 2,179,408
2021-04-19 13G INVE / Identiv, Inc. 1,649,808
2021-02-12 13G/A ICAD / iCAD, Inc. 1,173,569 1,161,199
2021-02-12 13G/A REPH / Societal CDMO Inc 1,293,376 1,293,376
2021-02-12 13G/A PRCH / Porch Group, Inc. 1,381,245 2,984,922
2021-02-12 13G/A PFSW / PFSWEB Inc 1,120,031 1,443,113
2021-02-12 13G/A HYRE / HyreCar Inc 876,131 638,574
2021-02-12 13G/A CHRA / Charah Solutions Inc 1,784,180 2,978,524
2021-02-12 13G/A AGTC / Applied Genetic Technologies Corp 1,309,341 1,307,727
2021-02-12 13G/A AMTX / Aemetis, Inc. 1,454,797 1,485,599
2021-02-08 13G DXLG / Destination XL Group, Inc. 3,158,956
2021-02-05 13G TA / TravelCenters of America Inc 810,195
2021-01-29 13G YELL / Yellow Corporation 2,786,969
2021-01-15 13G BMTX / BM Technologies, Inc. 911,902
2020-12-31 13G REPH / Societal CDMO Inc 1,293,376
2020-12-31 13G AMTX / Aemetis, Inc. 1,454,797
2020-12-28 13G ICAD / iCAD, Inc. 1,173,569
2020-09-28 13G AGTC / Applied Genetic Technologies Corp 1,309,341
2020-09-18 13G PFSW / PFSWEB Inc 1,120,031
2020-09-14 13G PRCH / Porch Group, Inc. 1,381,245
2020-07-20 13G CHRA / Charah Solutions Inc 1,784,180
2020-02-14 13G/A BAND / Bandwidth Inc. 698,439 295,000
2020-02-14 13G/A HYRE / HyreCar Inc 631,134 876,131
2020-02-14 13G/A ELF / e.l.f. Beauty, Inc. 2,660,353 2,231,423
2020-02-14 13G/A CRCM / Care.com, Inc. 1,903,264 613,911
2020-02-14 13G/A CARB / Carbonite, Inc. 1,818,977 0
2020-02-14 13G/A UPLD / Upland Software, Inc. 1,270,645 996,565
2020-02-14 13G/A US6821631008 / On Deck Capital, Inc. 3,878,965 0
2019-10-21 13G UPLD / Upland Software, Inc. 1,270,645
2019-05-01 13G ELF / e.l.f. Beauty, Inc. 2,660,353
2019-03-14 13G HYRE / HyreCar Inc 631,134
2019-02-13 13G/A BAND / Bandwidth Inc. 228,554 698,439
2019-02-13 13G/A US6821631008 / On Deck Capital, Inc. 4,167,863 3,878,965
2019-02-13 13G/A QMCO / Quantum Corporation 1,933,848 32,229
2019-02-13 13G/A USAK / USA Truck, Inc. 421,597 0
2019-02-13 13G/A PRTS / CarParts.com, Inc. 2,016,023 0
2019-02-13 13G/A CRCM / Care.com, Inc. 1,666,711 1,903,264
2019-02-13 13G/A CARB / Carbonite, Inc. 1,430,667 1,818,977
2019-02-13 13G/A INAP / Internap Corporation 1,115,007 896,089
2018-06-27 13G BAND / Bandwidth Inc. 228,554
2018-06-22 13G US6821631008 / On Deck Capital, Inc. 4,167,863
2018-04-16 13G CARB / Carbonite, Inc. 1,430,667
2018-02-14 13G/A APTI / Apptio, Inc. 346,265 757,945
2018-02-14 13G/A CRCM / Care.com, Inc. 1,507,119 1,666,711
2018-02-14 13G/A EMKR / Emcore Corporation 1,451,745 673,364
2018-02-14 13G/A INAP / Internap Corporation 1,115,007 1,115,007
2018-02-14 13G/A PRTS / CarParts.com, Inc. 2,068,553 2,016,023
2018-02-14 13G/A USAK / USA Truck, Inc. 464,563 421,597
2018-02-14 13G/A CWST / Casella Waste Systems, Inc. 3,012,984 1,019,449
2018-02-02 13G QMCO / Quantum Corporation 1,933,848
2018-01-05 13G INAP / Internap Corporation 1,115,007
2017-08-17 13G EMKR / Emcore Corporation 1,451,745
2017-07-07 13G USAK / USA Truck, Inc. 464,563
2017-06-01 13G PRTS / CarParts.com, Inc. 2,068,553
2017-05-11 13G CRCM / Care.com, Inc. 1,507,119
2017-04-13 13G APTI / Apptio, Inc. 346,265
2017-02-14 13G/A COVS / Covisint Corporation 3,072,129 0
2017-02-14 13G/A SAAS / inContact, Inc. 4,286,052 0
2017-02-03 13G/A CWST / Casella Waste Systems, Inc. 3,442,603 3,012,984
2016-02-10 13G/A SAAS / inContact, Inc. 3,246,895 4,286,052
2016-02-10 13G/A COVS / Covisint Corporation 2,003,302 3,072,129
2016-02-10 13G/A DWCH / Datawatch Corp. 0
2016-02-10 13G/A CWST / Casella Waste Systems, Inc. 3,442,603
2015-08-17 13G SAAS / inContact, Inc. 3,246,895
2015-05-08 13G COVS / Covisint Corporation 2,003,302
2015-02-10 13G/A CWST / Casella Waste Systems, Inc. 2,473,288
2015-01-13 13G DWCH / Datawatch Corp. 566,242
2014-10-20 13G CWST / Casella Waste Systems, Inc. 2,045,554
2014-02-13 13G ZLC / Zale Corp 933,547
2013-04-05 13G ZLC / Zale Corp 1,643,049
2013-02-01 13G ZLC / Zale Corp 858,480
2012-03-13 13G ZLC / Zale Corp 1,624,722
2012-02-09 13G/A SUMR / Summer Infant Inc 140,599