13F Filings History of Portolan Capital Management, LLC

Latest 13F report
Q4 2025 - 17 Feb 2026
Value $
$1,866,423,741
Signature - Title
Betsy Flaherty - Chief Compliance Officer
Location
Boston, MA
Summary
This page shows a list of all the recent 13F filings made by Portolan Capital Management, LLC. Form 13F is required to be filed within 45 days of the end of a calendar quarter. Portolan Capital Management, LLC reported 155 stock holdings with total value $1,866,423,741 as of Q4 2025. Top holdings included TTMI, MOD, CSTL, CLS, and AKAM.

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Holdings Value
Quarter Holdings Value $ Bought Sold Net Top Holdings Form Type Filing Time
Q4 2025 155 $1,866,423,741 +$634,036,126 -$646,462,519 -$12,426,393 TTMI, MOD, CSTL, CLS, AKAM 13F-HR 17 Feb 2026, 15:45
Q3 2025 119 $1,848,024,490 +$614,634,147 -$642,072,384 -$27,438,237 MOD, TTMI, ELF, DBRG, CLS 13F-HR 13 Nov 2025, 16:06
Q2 2025 118 $1,594,952,679 +$558,608,935 -$499,764,754 +$58,844,181 CLS, KTOS, ELF, AVAV, MOD 13F-HR 13 Aug 2025, 16:13
Q1 2025 109 $1,315,774,017 +$426,302,604 -$414,996,799 +$11,305,805 LNTH, SLM, KTOS, GENI, MOD 13F-HR 15 May 2025, 15:24
Q4 2024 131 $1,486,775,936 +$549,945,439 -$550,550,217 -$604,778 LNTH, CLS, SMTC, MOD, HNST 13F-HR 13 Feb 2025, 16:42
Q3 2024 129 $1,379,507,245 +$434,988,279 -$367,210,316 +$67,777,963 LNTH, ZETA, KTOS, TLN, CLS 13F-HR 14 Nov 2024, 13:01
Q2 2024 117 $1,214,451,099 +$320,863,951 -$402,033,413 -$81,169,462 LNTH, CLS, SMCI, ZETA, KTOS 13F-HR 14 Aug 2024, 16:21
Q1 2024 116 $1,312,928,631 +$407,032,102 -$563,659,845 -$156,627,743 SMCI, CLS, LNTH, ELF, BIO 13F-HR 15 May 2024, 13:45
Q4 2023 127 $1,143,735,104 +$379,884,441 -$403,855,078 -$23,970,637 SMCI, ELF, CLS, MOD, QTRX 13F-HR 14 Feb 2024, 13:12
Q3 2023 123 $1,070,047,809 +$308,529,367 -$310,214,208 -$1,684,841 SMCI, QTRX, ELF, CLS, LNTH 13F-HR 14 Nov 2023, 13:05
Q2 2023 120 $1,129,427,386 +$390,922,736 -$463,569,268 -$72,646,532 SMCI, KRUS, ELF, TGLS, SGH 13F-HR 14 Aug 2023, 12:29
Q1 2023 139 $1,049,873,651 +$378,538,782 -$434,955,320 -$56,416,538 SMCI, ELF, KRUS, TGLS, BIO 13F-HR 15 May 2023, 16:05
Q4 2022 131 $1,007,968,946 +$371,496,327 -$380,429,654 -$8,933,327 CROX, ELF, BIO, TGLS, IMXI 13F-HR 13 Feb 2023, 16:43
Q3 2022 128 $946,193,000 +$307,672,839 -$317,132,634 -$9,459,795 TA, ELF, LRN, CROX, INVE 13F-HR 14 Nov 2022, 15:17
Q2 2022 123 $993,160,000 +$455,198,266 -$499,847,485 -$44,649,219 ELF, DOMO, AVID, INVE, VTLE 13F-HR 15 Aug 2022, 14:57
Q1 2022 136 $1,254,633,000 +$530,647,700 -$574,371,520 -$43,723,820 DOMO, BAND, INVE, VST, APPS 13F-HR 16 May 2022, 14:46
Q4 2021 131 $1,474,942,000 +$377,126,082 -$350,986,647 +$26,139,435 INVE, BXC, CUBI, ELF, TGLS 13F-HR 14 Feb 2022, 14:39
Q3 2021 134 $1,372,017,000 +$277,071,083 -$246,415,312 +$30,655,771 CROX, TA, DOMO, TGLS, ELF 13F-HR 15 Nov 2021, 14:35
Q2 2021 131 $1,390,613,000 +$385,935,339 -$384,467,727 +$1,467,612 GPRE, MGI, DOMO, STKL, ELF 13F-HR 16 Aug 2021, 15:23
Q1 2021 151 $1,273,386,000 +$353,787,680 -$396,019,782 -$42,232,102 BW, CAI, STKL, ELF, DSKE 13F-HR 17 May 2021, 14:51
Q4 2020 164 $1,100,144,000 +$442,690,954 -$403,514,200 +$39,176,754 STKL, ELF, QNST, AMZN, ENVA 13F-HR 16 Feb 2021, 14:18
Q3 2020 139 $883,795,000 +$292,823,388 -$380,885,968 -$88,062,580 LPRO, QNST, AMZN, BAND, STKL 13F-HR 16 Nov 2020, 14:02
Q2 2020 128 $875,617,000 +$344,386,350 -$368,484,389 -$24,098,039 BAND, LRN, UPLD, AMZN, EVBG 13F-HR 14 Aug 2020, 15:03
Q1 2020 112 $666,606,000 +$322,418,921 -$497,274,473 -$174,855,552 UPLD, BAND, BIO, AKAM, LPSN 13F-HR 14 May 2020, 11:37
Q4 2019 95 $989,941,000 +$229,606,176 -$184,731,427 +$44,874,749 LPSN, CROX, ELF, UPLD, AAN 13F-HR 14 Feb 2020, 11:06
Q3 2019 87 $887,069,000 +$223,515,558 -$248,349,752 -$24,834,194 UPLD, LPSN, ELF, AAN, MPC 13F-HR 14 Nov 2019, 14:01
Q2 2019 88 $929,697,000 +$192,659,125 -$227,359,996 -$34,700,871 BAND, UPLD, ELF, EEFT, AAN 13F-HR 14 Aug 2019, 14:13
Q1 2019 87 $972,038,000 +$338,981,127 -$287,559,241 +$51,421,886 BAND, UPLD, AAN, EEFT, BIO 13F-HR 15 May 2019, 14:18
Q4 2018 82 $806,780,000 +$243,778,181 -$224,707,381 +$19,070,800 CARB, CRCM, SLM, NTNX, BAND 13F-HR 13 Feb 2019, 16:38
Q3 2018 96 $1,013,499,000 +$170,725,416 -$216,059,355 -$45,333,939 CARB, UIS, CRCM, HDP, AAN 13F-HR 14 Nov 2018, 08:32
Q2 2018 99 $979,359,000 +$230,352,830 -$234,903,398 -$4,550,568 CARB, CRCM, AAN, HDP, ONDK 13F-HR 14 Aug 2018, 15:40
Q1 2018 100 $912,922,000 +$195,349,231 -$228,970,123 -$33,620,892 CARB, WIFI, NTNX, CRCM, SLM 13F-HR 14 May 2018, 16:10
Q4 2017 116 $913,145,000 +$204,266,853 -$220,029,024 -$15,762,171 CRCM, SLM, WIFI, CARB, NTNX 13F-HR 14 Feb 2018, 11:12
Q3 2017 111 $838,776,000 +$253,802,305 -$250,419,501 +$3,382,804 CWST, WIFI, SLM, CRCM, CALD 13F-HR 14 Nov 2017, 08:34
Q2 2017 117 $779,231,000 +$254,547,947 -$296,019,418 -$41,471,471 CWST, CALD, SLM, CRCM, HDP 13F-HR 14 Aug 2017, 15:54
Q1 2017 120 $769,677,000 +$237,513,418 -$270,624,584 -$33,111,166 CWST, CALD, STMP, GOOG, EEFT 13F-HR 15 May 2017, 12:14
Q4 2016 125 $742,731,000 +$296,385,217 -$288,424,609 +$7,960,608 CWST, STMP, CALD, GOOG, NXTM 13F-HR 14 Feb 2017, 14:35
Q3 2016 109 $728,658,000 +$194,325,819 -$236,338,750 -$42,012,931 CWST, RNG, VG, STMP, GOOG 13F-HR 14 Nov 2016, 09:43
Q2 2016 109 $694,370,000 +$184,127,532 -$265,881,988 -$81,754,456 CWST, STMP, CALD, EEFT, GOOG 13F-HR 12 Aug 2016, 16:01
Q1 2016 111 $746,820,000 +$289,068,494 -$304,163,144 -$15,094,650 SAAS, CWST, GOOG, STMP, CALD 13F-HR 13 May 2016, 14:05
Q4 2015 123 $789,012,000 +$274,286,924 -$271,631,674 +$2,655,250 SAAS, EGHT, STMP, CALD, CWST 13F-HR 12 Feb 2016, 12:09
Q3 2015 114 $754,682,000 +$304,151,719 -$192,147,821 +$112,003,898 SAAS, CALD, CWST, ANIK, FLML 13F-HR 13 Nov 2015, 09:45
Q2 2015 119 $715,022,000 +$294,512,601 -$111,366,606 +$183,145,995 SAAS, CWST, FLML, MWW, ABMD 13F-HR 14 Aug 2015, 11:43
Q1 2015 113 $545,063,000 +$203,532,521 -$179,394,791 +$24,137,730 ABMD, CWST, ANIK, MERC, SQNM 13F-HR 15 May 2015, 08:25
Q4 2014 106 $499,235,000 +$260,886,205 -$243,967,141 +$16,919,064 GT, ODP, ANIK, BYON, HHC 13F-HR 11 Feb 2015, 09:18
Q3 2014 104 $440,280,000 +$142,683,061 -$146,364,844 -$3,681,783 MOVE, CALD, ABMD, HHC, ANIK 13F-HR 13 Nov 2014, 11:45
Q2 2014 119 $457,823,000 +$143,612,143 -$129,891,073 +$13,721,070 MOVE, TSO, EA, GT, ANIK 13F-HR 12 Aug 2014, 09:58
Q1 2014 139 $434,359,000 +$142,851,163 -$159,523,456 -$16,672,293 MOVE, HHC, ASPS, TSO, GT 13F-HR 14 May 2014, 17:33
Q4 2013 119 $451,005,000 $0 $0 $0 WEB, ZLC, ASPS, MOVE, RESI 13F-HR 13 Feb 2014, 11:55