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

OMB APPROVAL

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	11,570	290,340	SH		SOLE		290,340	0	0
ABIOMED, INC.	COM	003654100	4,205	22,440	SH		SOLE		22,440	0	0
ABRAXAS PETROLEUM CORPORATION	COM	003830106	15,700	6,382,145	SH		SOLE		6,382,145	0	0
ADOBE SYSTEMS, INC.	COM	00724F101	2,420	13,810	SH		SOLE		13,810	0	0
ALCOA CORPORATION	COM	013872106	1,965	36,468	SH		SOLE		36,468	0	0
ALPHABET, INC.	COM	02079K107	11,687	11,169	SH		SOLE		11,169	0	0
ALTISOURCE RESIDENTIAL CORPORATION	COM	02153W100	3,866	325,935	SH		SOLE		325,935	0	0
AMBARELLA, INC.	COM	G037AX101	6,476	110,229	SH		SOLE		110,229	0	0
AMERICAN AXLE & MFG HOLDINGS, INC.	COM	024061103	4,398	258,259	SH		SOLE		258,259	0	0
ANIKA THERAPEUTICS, INC.	COM	035255108	785	14,556	SH		SOLE		14,556	0	0
APPTIO, INC.	COM	03835C108	17,827	757,945	SH		SOLE		757,945	0	0
ARDMORE SHIPPING CORPORATION	COM	Y0207T100	2,419	302,336	SH		SOLE		302,336	0	0
ATTUNITY LTD	COM	M15332121	4,690	671,898	SH		SOLE		671,898	0	0
AXON ENTERPRISE, INC.	COM	05464C101	5,502	207,632	SH		SOLE		207,632	0	0
AXT, INC.	COM	00246W103	5,372	617,482	SH		SOLE		617,482	0	0
BILL BARRETT CORPORATION	COM	06846N104	1,350	263,091	SH		SOLE		263,091	0	0
BIO-RAD LABORATORIES, INC.	COM	090572207	16,487	69,080	SH		SOLE		69,080	0	0
BIOSCRIP, INC.	COM	09069N108	1,054	362,323	SH		SOLE		362,323	0	0
BOINGO WIRELESS, INC.	COM	09739C102	27,503	1,222,366	SH		SOLE		1,222,366	0	0
BOX, INC.	COM	10316T104	14,025	664,043	SH		SOLE		664,043	0	0
CALAVO GROWERS, INC.	COM	128246105	20,658	244,758	SH		SOLE		244,758	0	0
CALLIDUS SOFTWARE, INC.	COM	13123E500	21,117	737,068	SH		SOLE		737,068	0	0
CAMBREX CORPORATION	COM	132011107	6,954	144,881	SH		SOLE		144,881	0	0
CARBONITE, INC.	COM	141337105	24,160	962,569	SH		SOLE		962,569	0	0
CARE.COM, INC.	COM	141633107	30,067	1,666,711	SH		SOLE		1,666,711	0	0
CARROLS RESTAURANT GROUP, INC.	COM	14574X104	625	51,431	SH		SOLE		51,431	0	0
CASELLA WASTE SYSTEMS, INC.	COM	147448104	23,468	1,019,449	SH		SOLE		1,019,449	0	0
CENTRAL GARDEN & PET COMPANY	COM	153527106	8,325	213,913	SH		SOLE		213,913	0	0
COMERICA INCORPORATED	COM	200340107	3,653	42,085	SH		SOLE		42,085	0	0
CONNS, INC.	COM	208242107	5,196	146,155	SH		SOLE		146,155	0	0
COOPER TIRE & RUBBER CO.	COM	216831107	3,731	105,548	SH		SOLE		105,548	0	0
COOPER-STANDARD HOLDINGS, INC.	COM	21676P103	5,959	48,642	SH		SOLE		48,642	0	0
COSTAMARE, INC.	COM	Y1771G102	1,560	270,356	SH		SOLE		270,356	0	0
COTT CORP.	COM	22163N106	9,754	585,478	SH		SOLE		585,478	0	0
COVENANT TRANSPORTATION GROUP, INC.	COM	22284P105	5,633	196,052	SH		SOLE		196,052	0	0
DASEKE, INC.	COM	23753F107	21,457	1,501,564	SH		SOLE		1,501,564	0	0
DEVON ENERGY CORPORATION	COM	25179M103	8,626	208,350	SH		SOLE		208,350	0	0
EARTHSTONE ENERGY, INC.	COM	27032D304	4,423	416,046	SH		SOLE		416,046	0	0
EBIX, INC.	COM	278715206	15,231	192,183	SH		SOLE		192,183	0	0
ECHO GLOBAL LOGISTICS, INC.	COM	27875T101	1,003	35,826	SH		SOLE		35,826	0	0
ELECTRONIC ARTS	COM	285512109	1,338	12,733	SH		SOLE		12,733	0	0
EMCORE CORPORATION	COM	290846203	4,343	673,364	SH		SOLE		673,364	0	0
EURONET WORLDWIDE, INC.	COM	298736109	12,415	147,319	SH		SOLE		147,319	0	0
EXTRACTION OIL & GAS, INC.	COM	30227M105	17,417	1,217,108	SH		SOLE		1,217,108	0	0
FABRINET	COM	G3323L100	2,628	91,584	SH		SOLE		91,584	0	0
FACEBOOK, INC.	COM	30303M102	8,107	45,942	SH		SOLE		45,942	0	0
FARMERS BROTHERS CO.	COM	307675108	4,760	148,041	SH		SOLE		148,041	0	0
FIFTH THIRD BANCORP	COM	316773100	7,144	235,465	SH		SOLE		235,465	0	0
FIVE9, INC.	COM	338307101	924	37,128	SH		SOLE		37,128	0	0
GENESCO, INC.	COM	371532102	1,232	37,914	SH		SOLE		37,914	0	0
GODADDY, INC.	COM	380237107	12,832	255,202	SH		SOLE		255,202	0	0
GROUPON, INC.	COM	399473107	12,933	2,535,885	SH		SOLE		2,535,885	0	0
GULFPORT ENERGY CORPORATION	COM	402635304	9,865	773,105	SH		SOLE		773,105	0	0
HORTONWORKS, INC.	COM	440894103	22,223	1,105,077	SH		SOLE		1,105,077	0	0
HUBSPOT, INC.	COM	443573100	1,095	12,390	SH		SOLE		12,390	0	0
HUDSON TECHNOLOGIES, INC.	COM	444144109	5,357	882,482	SH		SOLE		882,482	0	0
INPHI CORPORATION	COM	45772F107	491	13,409	SH		SOLE		13,409	0	0
INSTRUCTURE, INC.	COM	45781U103	5,261	158,952	SH		SOLE		158,952	0	0
INTERNAP CORPORATION	COM	45885A409	17,517	1,115,007	SH		SOLE		1,115,007	0	0
J B HUNT TRANSPORT SERVICES, INC.	COM	445658107	2,570	22,350	SH		SOLE		22,350	0	0
KAPSTONE PAPER AND PACKAGING CORPORATION	COM	48562P103	7,459	328,730	SH		SOLE		328,730	0	0
KEMET CORPORATION	COM	488360207	7,961	528,626	SH		SOLE		528,626	0	0
KNIGHT-SWIFT TRANSPORTATION HOLDINGS, INC.	COM	499049104	4,617	105,612	SH		SOLE		105,612	0	0
KVH INDUSTRIES, INC.	COM	482738101	1,668	161,146	SH		SOLE		161,146	0	0
LENDINGTREE, INC.	COM	52603B107	7,079	20,793	SH		SOLE		20,793	0	0
LKQ CORPORATION	COM	501889208	5,240	128,846	SH		SOLE		128,846	0	0
MACOM TECHNOLOGY SOLUTIONS	COM	55405Y100	1,167	35,878	SH		SOLE		35,878	0	0
MATCH GROUP, INC.	COM	57665R106	15,006	479,261	SH		SOLE		479,261	0	0
MIMECAST LIMITED	COM	G14838109	3,584	125,014	SH		SOLE		125,014	0	0
MINDBODY, INC.	COM	60255W105	683	22,442	SH		SOLE		22,442	0	0
NEVRO CORP.	COM	64157F103	2,301	33,335	SH		SOLE		33,335	0	0
NEW RELIC, INC.	COM	64829B100	1,129	19,535	SH		SOLE		19,535	0	0
NOMAD FOODS LIMITED	COM	G6564A105	14,636	865,533	SH		SOLE		865,533	0	0
NUANCE COMMUNICATIONS, INC.	COM	67020Y100	3,730	228,153	SH		SOLE		228,153	0	0
NUTANIX, INC.	COM	67059N108	23,583	668,450	SH		SOLE		668,450	0	0
OCLARO, INC.	COM	67555N206	1,829	271,438	SH		SOLE		271,438	0	0
ON DECK CAPITAL, INC.	COM	682163100	12,621	2,198,826	SH		SOLE		2,198,826	0	0
ORION ENGINEERED CARBONS S.A. CMN	COM	L72967109	4,852	189,520	SH		SOLE		189,520	0	0
PACKAGING CORPORATION OF AMERICA	COM	695156109	1,192	9,888	SH		SOLE		9,888	0	0
PAYPAL HOLDINGS, INC.	COM	70450Y103	2,284	31,020	SH		SOLE		31,020	0	0
PENSARE ACQUISITION CORP.	OTHER	70957E204	2,873	278,414	SH		SOLE		278,414	0	0
PITNEY-BOWES, INC.	COM	724479100	6,304	563,848	SH		SOLE		563,848	0	0
PREFERRED BANK	COM	740367404	3,281	55,826	SH		SOLE		55,826	0	0
PRIMO WATER CORPORATION	COM	74165N105	13,839	1,100,919	SH		SOLE		1,100,919	0	0
QAD, INC.	COM	74727D306	7,413	190,801	SH		SOLE		190,801	0	0
QUALYS, INC.	COM	74758T303	11,772	198,346	SH		SOLE		198,346	0	0
QUANTUM CORPORATION	COM	747906501	6,183	1,098,137	SH		SOLE		1,098,137	0	0
RAPID7, INC.	COM	753422104	7,340	393,370	SH		SOLE		393,370	0	0
RAYONIER ADVANCED MATERIALS, INC.	COM	75508B104	4,563	223,127	SH		SOLE		223,127	0	0
REALPAGE, INC.	COM	75606N109	5,870	132,495	SH		SOLE		132,495	0	0
RED LION HOTELS CORPORATION	COM	756764106	5,927	601,705	SH		SOLE		601,705	0	0
RESOLUTE ENERGY CORPORATION	COM	76116A306	9,652	306,704	SH		SOLE		306,704	0	0
RH	COM	74967X103	900	10,437	SH		SOLE		10,437	0	0
RINGCENTRAL, INC.	COM	76680R206	2,744	56,693	SH		SOLE		56,693	0	0
RYERSON HOLDING CORPORATION	COM	783754104	6,914	664,826	SH		SOLE		664,826	0	0
SCORPIO TANKERS, INC.	COM	Y7542C106	5,222	1,712,247	SH		SOLE		1,712,247	0	0
SKECHERS USA, INC.	COM	830566105	19,204	507,517	SH		SOLE		507,517	0	0
SLM CORPORATION	COM	78442P106	29,392	2,601,061	SH		SOLE		2,601,061	0	0
SPORTSMANS WAREHOUSE HOLDINGS, INC.	COM	84920Y106	2,856	432,030	SH		SOLE		432,030	0	0
STAMPS.COM, INC.	COM	852857200	10,557	56,152	SH		SOLE		56,152	0	0
SVB FINANCIAL GROUP	COM	78486Q101	4,673	19,988	SH		SOLE		19,988	0	0
SYSTEMAX, INC.	COM	871851101	7,934	238,470	SH		SOLE		238,470	0	0
TRITON INTERNATIONAL LIMITED	COM	G9078F107	3,615	96,519	SH		SOLE		96,519	0	0
TUESDAY MORNING CORPORATION	COM	899035505	2,404	874,289	SH		SOLE		874,289	0	0
U.S. AUTO PARTS NETWORK, INC.	COM	90343C100	5,080	2,016,023	SH		SOLE		2,016,023	0	0
UNITED THERAPEUTICS CORPORATION	COM	91307C102	5,064	34,227	SH		SOLE		34,227	0	0
UNIVAR, INC.	COM	91336L107	7,498	242,196	SH		SOLE		242,196	0	0
USA TRUCK, INC.	COM	902925106	7,644	421,597	SH		SOLE		421,597	0	0
VIASAT, INC.	COM	92552V100	2,940	39,279	SH		SOLE		39,279	0	0
VIRTUSA CORPORATION	COM	92827P102	5,149	116,806	SH		SOLE		116,806	0	0
VOYA FINANCIAL, INC.	COM	929089100	7,669	155,016	SH		SOLE		155,016	0	0
WESTROCK COMPANY	COM	96145D105	6,413	101,456	SH		SOLE		101,456	0	0
WHITING PETROLEUM CORPORATION	COM	966387409	16,129	609,094	SH		SOLE		609,094	0	0
WINTRUST FINANCIAL CORPORATION	COM	97650W108	3,963	48,115	SH		SOLE		48,115	0	0
WIX .COM LTD.	COM	M98068105	5,968	103,701	SH		SOLE		103,701	0	0
YELP, INC.	COM	985817105	4,222	100,629	SH		SOLE		100,629	0	0