Portolan Capital Management 13F-HR Quarterly holdings report by institutional manager

The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
The reader should not assume that the information is accurate and complete.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F INFORMATION TABLE

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OMB Number:		3235-0006
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COLUMN 1	COLUMN 2	COLUMN 3	COLUMN 4	COLUMN 5			COLUMN 6	COLUMN 7	COLUMN 8
			VALUE	SHRS OR	SH/	PUT/	INVESTMENT	OTHER	VOTING AUTHORITY
NAME OF ISSUER	TITLE OF CLASS	CUSIP	(x$1000)	PRN AMT	PRN	CALL	DISCRETION	MANAGER	SOLE	SHARED	NONE
AARON'S, INC.	COM	002535300	33,911	780,451	SH		SOLE		780,451	0	0
ABIOMED, INC.	COM	003654100	1,923	4,700	SH		SOLE		4,700	0	0
ABRAXAS PETROLEUM CORPORATION	COM	003830106	13,098	4,532,304	SH		SOLE		4,532,304	0	0
ADVANCED DISPOSAL SERVICES, INC.	COM	00790X101	8,755	353,305	SH		SOLE		353,305	0	0
ALCOA CORPORATION	COM	013872106	658	14,032	SH		SOLE		14,032	0	0
ALPHABET, INC.	COM	02079K107	16,042	14,379	SH		SOLE		14,379	0	0
AMERICAN AXLE & MFG HOLDINGS, INC.	COM	024061103	10,056	646,301	SH		SOLE		646,301	0	0
ANIKA THERAPEUTICS, INC.	COM	035255108	5,187	162,080	SH		SOLE		162,080	0	0
APPTIO, INC.	COM	03835C108	20,642	570,218	SH		SOLE		570,218	0	0
ATTUNITY LTD	COM	M15332121	9,481	816,588	SH		SOLE		816,588	0	0
AVADEL PHARMACEUTICALS PLC	COM	05337M104	956	155,971	SH		SOLE		155,971	0	0
AXON ENTERPRISE, INC.	COM	05464C101	973	15,396	SH		SOLE		15,396	0	0
AXT, INC.	COM	00246W103	2,971	421,362	SH		SOLE		421,362	0	0
BANDWIDTH INC.	COM	05988J103	8,680	228,554	SH		SOLE		228,554	0	0
BIO-RAD LABORATORIES, INC.	COM	090572207	15,516	53,775	SH		SOLE		53,775	0	0
BOINGO WIRELESS, INC.	COM	09739C102	21,250	940,687	SH		SOLE		940,687	0	0
BOX, INC.	COM	10316T104	13,296	532,046	SH		SOLE		532,046	0	0
CAI INTERNATIONAL, INC.	COM	12477X106	3,104	133,559	SH		SOLE		133,559	0	0
CALAVO GROWERS, INC.	COM	128246105	1,651	17,174	SH		SOLE		17,174	0	0
CAMBREX CORPORATION	COM	132011107	11,982	229,095	SH		SOLE		229,095	0	0
CAPITAL SENIOR LIVING CORPORATION	COM	140475104	6,447	604,260	SH		SOLE		604,260	0	0
CARBONITE, INC.	COM	141337105	51,802	1,484,309	SH		SOLE		1,484,309	0	0
CARE.COM, INC.	COM	141633107	34,645	1,659,246	SH		SOLE		1,659,246	0	0
CARROLS RESTAURANT GROUP, INC.	COM	14574X104	10,566	711,547	SH		SOLE		711,547	0	0
CASELLA WASTE SYSTEMS, INC.	COM	147448104	14,681	573,258	SH		SOLE		573,258	0	0
CENTRAL GARDEN & PET COMPANY	COM	153527106	9,354	215,144	SH		SOLE		215,144	0	0
CLEVELAND-CLIFFS, INC.	COM	185899101	6,942	823,520	SH		SOLE		823,520	0	0
CONNS, INC.	COM	208242107	9,186	278,376	SH		SOLE		278,376	0	0
COOPER TIRE & RUBBER COMPANY	COM	216831107	8,667	329,535	SH		SOLE		329,535	0	0
COVENANT TRANSPORTATION GROUP, INC.	COM	22284P105	9,256	293,850	SH		SOLE		293,850	0	0
DASEKE, INC.	COM	23753F107	15,343	1,545,087	SH		SOLE		1,545,087	0	0
EARTHSTONE ENERGY, INC.	COM	27032D304	1,818	205,412	SH		SOLE		205,412	0	0
EBIX, INC.	COM	278715206	21,022	275,694	SH		SOLE		275,694	0	0
EMCORE CORPORATION	COM	290846203	1,558	308,500	SH		SOLE		308,500	0	0
EURONET WORLDWIDE, INC.	COM	298736109	13,458	160,651	SH		SOLE		160,651	0	0
EVERBRIDGE, INC.	COM	29978A104	6,302	132,894	SH		SOLE		132,894	0	0
EXTRACTION OIL & GAS, INC.	COM	30227M105	23,369	1,590,827	SH		SOLE		1,590,827	0	0
FACEBOOK, INC.	COM	30303M102	10,802	55,591	SH		SOLE		55,591	0	0
FARMERS BROS. CO.	COM	307675108	8,434	276,088	SH		SOLE		276,088	0	0
FIESTA RESTAURANT GROUP, INC.	COM	31660B101	4,597	160,186	SH		SOLE		160,186	0	0
GODADDY INC.	COM	380237107	17,521	248,178	SH		SOLE		248,178	0	0
HIGHPOINT RESOURCES CORPORATION	COM	43114K108	7,214	1,186,521	SH		SOLE		1,186,521	0	0
HORTONWORKS, INC.	COM	440894103	32,684	1,793,841	SH		SOLE		1,793,841	0	0
HUDSON TECHNOLOGIES, INC.	COM	444144109	364	181,258	SH		SOLE		181,258	0	0
IMMUNE DESIGN CORP.	COM	45252L103	2,024	444,875	SH		SOLE		444,875	0	0
INSTRUCTURE, INC.	COM	45781U103	1,512	35,543	SH		SOLE		35,543	0	0
INTERNAP CORPORATION	COM	45885A409	11,675	1,120,467	SH		SOLE		1,120,467	0	0
J2 GLOBAL, INC.	COM	48123V102	4,924	56,852	SH		SOLE		56,852	0	0
KAPSTONE PAPER AND PACKAGING CORPORATION	COM	48562P103	1,395	40,433	SH		SOLE		40,433	0	0
KNIGHT-SWIFT TRANSPORTATION HOLDINGS, INC.	COM	499049104	6,055	158,479	SH		SOLE		158,479	0	0
KVH INDUSTRIES, INC.	COM	482738101	1,710	127,635	SH		SOLE		127,635	0	0
LENDINGTREE, INC.	COM	52603B107	6,034	28,223	SH		SOLE		28,223	0	0
LKQ CORPORATION	COM	501889208	13,224	414,538	SH		SOLE		414,538	0	0
MARTEN TRANSPORT, LTD.	COM	573075108	4,531	193,223	SH		SOLE		193,223	0	0
MATCH GROUP, INC.	COM	57665R106	10,192	263,077	SH		SOLE		263,077	0	0
MERCER INTERNATIONAL INC	COM	588056101	5,686	324,934	SH		SOLE		324,934	0	0
NEVRO CORP.	COM	64157F103	2,644	33,106	SH		SOLE		33,106	0	0
NOMAD FOODS LIMITED	COM	G6564A105	7,537	392,774	SH		SOLE		392,774	0	0
NUTANIX, INC.	COM	67059N108	21,011	407,419	SH		SOLE		407,419	0	0
OASIS PETROLEUM INC.	COM	674215108	9,080	700,115	SH		SOLE		700,115	0	0
ON DECK CAPITAL, INC.	COM	682163100	29,175	4,167,863	SH		SOLE		4,167,863	0	0
ORION ENGINEERED CARBONS S.A.	COM	L72967109	2,768	89,740	SH		SOLE		89,740	0	0
PACKAGING CORPORATION OF AMERICA	COM	695156109	1,409	12,605	SH		SOLE		12,605	0	0
PDC ENERGY, INC.	COM	69327R101	8,470	140,117	SH		SOLE		140,117	0	0
PENSARE ACQUISITION CORP.	UNIT	70957E204	1,847	174,253	SH		SOLE		174,253	0	0
PETIQ, INC.	COM	71639T106	5,442	202,592	SH		SOLE		202,592	0	0
PITNEY-BOWES, INC.	COM	724479100	2,615	305,165	SH		SOLE		305,165	0	0
PREFERRED BANK	COM	740367404	4,902	79,759	SH		SOLE		79,759	0	0
PRIMO WATER CORPORATION	COM	74165N105	15,750	900,526	SH		SOLE		900,526	0	0
PURE ACQUISITION CORP.	COM	74621Q106	819	84,998	SH		SOLE		84,998	0	0
PURE ACQUISITION CORP.	WTS	74621Q114	54	42,499	SH		SOLE		42,499	0	0
QAD, INC.	COM	74727D306	15,830	315,647	SH		SOLE		315,647	0	0
QUALYS, INC.	COM	74758T303	2,803	33,250	SH		SOLE		33,250	0	0
QUANTUM CORPORATION	COM	747906501	4,572	2,078,153	SH		SOLE		2,078,153	0	0
QURATE RETAIL, INC.	COM	74915M100	1,693	79,773	SH		SOLE		79,773	0	0
RAPID7, INC.	COM	753422104	12,009	425,535	SH		SOLE		425,535	0	0
RAYONIER ADVANCED MATERIALS, INC.	COM	75508B104	5,552	324,868	SH		SOLE		324,868	0	0
REALPAGE, INC.	COM	75606N109	6,825	123,864	SH		SOLE		123,864	0	0
RED LION HOTELS CORPORATION	COM	756764106	11,891	1,020,676	SH		SOLE		1,020,676	0	0
RH	COM	74967X103	668	4,784	SH		SOLE		4,784	0	0
SKECHERS USA, INC.	COM	830566105	28,425	947,193	SH		SOLE		947,193	0	0
SLM CORPORATION	COM	78442P106	23,537	2,055,661	SH		SOLE		2,055,661	0	0
STAMPS.COM, INC.	COM	852857200	18,510	73,149	SH		SOLE		73,149	0	0
SYSTEMAX, INC.	COM	871851101	4,602	134,048	SH		SOLE		134,048	0	0
THE GOODYEAR TIRE & RUBBER COMPANY	COM	382550101	9,574	411,095	SH		SOLE		411,095	0	0
TPG PACE ENERGY HOLDINGS CORP.	COM	872656103	4,719	434,118	SH		SOLE		434,118	0	0
TUESDAY MORNING CORPORATION	COM	899035505	3,626	1,188,941	SH		SOLE		1,188,941	0	0
U.S. AUTO PARTS NETWORK, INC.	COM	90343C100	2,919	1,946,319	SH		SOLE		1,946,319	0	0
UNISYS CORPORATION	COM	909214306	23,163	1,795,559	SH		SOLE		1,795,559	0	0
UNIVAR, INC.	COM	91336L107	9,808	373,795	SH		SOLE		373,795	0	0
UPLAND SOFTWARE, INC.	COM	91544A109	7,953	231,389	SH		SOLE		231,389	0	0
USA TRUCK, INC.	COM	902925106	4,189	178,488	SH		SOLE		178,488	0	0
VIASAT, INC.	COM	92552V100	1,274	19,392	SH		SOLE		19,392	0	0
VIRTUSA CORPORATION	COM	92827P102	4,527	92,989	SH		SOLE		92,989	0	0
VOYA FINANCIAL, INC.	COM	929089100	9,504	202,203	SH		SOLE		202,203	0	0
WESTERN DIGITAL CORPORATION	COM	958102105	4,707	60,804	SH		SOLE		60,804	0	0
WESTROCK COMPANY	COM	96145D105	14,948	262,160	SH		SOLE		262,160	0	0
WHITING PETROLEUM CORPORATION	COM	966387409	24,717	468,840	SH		SOLE		468,840	0	0
YELP INC.	COM	985817105	8,165	208,394	SH		SOLE		208,394	0	0