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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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
1-800-FLOWERS.COM, INC.	COM	68243Q106	2,851	316,058	SH		SOLE		316,058	0	0
8X8, INC.	COM	282914100	12,768	873,915	SH		SOLE		873,915	0	0
AARON RENTS, INC.	COM	002535300	11,056	505,067	SH		SOLE		505,067	0	0
ABIOMED, INC.	COM	003654100	5,215	47,720	SH		SOLE		47,720	0	0
ABRAXAS PETROLEUM CORPORATION	COM	003830106	4,168	3,688,924	SH		SOLE		3,688,924	0	0
ADOBE SYSTEMS, INC.	COM	00724F101	2,259	23,586	SH		SOLE		23,586	0	0
ADVANCE AUTO PARTS, INC.	COM	00751Y106	8,454	52,305	SH		SOLE		52,305	0	0
AGIOS PHARMACEUTICALS, INC.	COM	00847X104	1,687	40,261	SH		SOLE		40,261	0	0
ALLIANCE DATA SYSTEMS CORPORATION	COM	018581108	3,136	16,009	SH		SOLE		16,009	0	0
ALPHABET, INC.	COM	02079K107	18,929	27,350	SH		SOLE		27,350	0	0
AMERICAN AIRLINES GROUP, INC.	COM	02376R102	4,022	142,070	SH		SOLE		142,070	0	0
ANIKA THERAPEUTICS, INC.	COM	035255108	2,765	51,540	SH		SOLE		51,540	0	0
APIGEE CORPORATION	COM	03765N108	7,809	639,052	SH		SOLE		639,052	0	0
APPLIED OPTOELECTRONICS, INC.	COM	03823U102	3,952	354,480	SH		SOLE		354,480	0	0
ASSURED GUARANTY LTD.	COM	G0585R106	2,691	106,084	SH		SOLE		106,084	0	0
AUTOBYTEL, INC.	COM	05275N205	6,854	494,181	SH		SOLE		494,181	0	0
BIO-RAD LABORATORIES, INC.	COM	090572207	12,242	85,597	SH		SOLE		85,597	0	0
BLUCORA, INC.	COM	095229100	6,033	582,316	SH		SOLE		582,316	0	0
BLUEBIRD BIO, INC.	COM	09609G100	1,606	37,090	SH		SOLE		37,090	0	0
BRAVO BRIO RESTAURANT GROUP, INC.	COM	10567B109	2,997	365,974	SH		SOLE		365,974	0	0
BROADSOFT, INC.	COM	11133B409	4,187	102,050	SH		SOLE		102,050	0	0
BROOKDALE SENIOR LIVING, INC.	COM	112463104	5,353	346,684	SH		SOLE		346,684	0	0
CAI INTERNATIONAL, INC.	COM	12477X106	2,334	311,174	SH		SOLE		311,174	0	0
CALLIDUS SOFTWARE, INC.	COM	13123E500	23,660	1,184,205	SH		SOLE		1,184,205	0	0
CAPITAL SENIOR LIVING CORPORATION	COM	140475104	12,916	730,934	SH		SOLE		730,934	0	0
CARE COM, INC.	COM	141633107	12,949	1,108,624	SH		SOLE		1,108,624	0	0
CARROLS RESTAURANT GROUP, INC.	COM	14574X104	6,313	530,487	SH		SOLE		530,487	0	0
CASELLA WASTE SYSTEMS, INC.	COM	147448104	30,198	3,846,836	SH		SOLE		3,846,836	0	0
CEMPRA, INC.	COM	15130J109	4,874	295,575	SH		SOLE		295,575	0	0
CERNER CORPORATION	COM	156782104	8,411	143,539	SH		SOLE		143,539	0	0
CF CORPORATION	COM	G20307123	3,282	330,810	SH		SOLE		330,810	0	0
COGNIZANT TECH SOLUTIONS CORPORATION	COM	192446102	660	11,523	SH		SOLE		11,523	0	0
CONFORMIS, INC.	COM	20717E101	6,957	991,032	SH		SOLE		991,032	0	0
CPI CARD GROUP, INC.	COM	12634H101	3,210	640,733	SH		SOLE		640,733	0	0
CRYOLIFE, INC.	COM	228903100	6,511	551,271	SH		SOLE		551,271	0	0
DESTINATION XL GROUP, INC.	COM	25065K104	7,146	1,563,747	SH		SOLE		1,563,747	0	0
EL POLLO LOCO HOLDINGS, INC.	COM	268603107	3,789	291,445	SH		SOLE		291,445	0	0
ELECTRONIC ARTS	COM	285512109	12,311	162,503	SH		SOLE		162,503	0	0
EURONAV NV	COM	B38564108	1,234	134,575	SH		SOLE		134,575	0	0
EURONET WORLDWIDE, INC.	COM	298736109	19,805	286,237	SH		SOLE		286,237	0	0
EXPEDIA, INC.	COM	30212P303	3,097	29,130	SH		SOLE		29,130	0	0
FACEBOOK, INC.	COM	30303M102	7,556	66,115	SH		SOLE		66,115	0	0
FERROGLOBE, PLC	COM	G33856108	2,799	325,071	SH		SOLE		325,071	0	0
FIDELITY NATIONAL FINANCIAL, INC.	COM	31620R303	7,606	202,837	SH		SOLE		202,837	0	0
FIESTA RESTAURANT GROUP, INC.	COM	31660B101	6,239	286,047	SH		SOLE		286,047	0	0
FIVE STAR QUALITY CARE, INC.	COM	33832D106	4,083	1,744,661	SH		SOLE		1,744,661	0	0
FIVE9, INC.	COM	338307101	5,113	429,679	SH		SOLE		429,679	0	0
FLAMEL TECHNOLOGIES	COM	338488109	9,261	862,294	SH		SOLE		862,294	0	0
GODADDY.COM, INC.	COM	380237107	5,417	173,666	SH		SOLE		173,666	0	0
GROUPON, INC.	COM	399473107	4,793	1,474,847	SH		SOLE		1,474,847	0	0
GUIDANCE SOFTWARE, INC.	COM	401692108	1,248	201,660	SH		SOLE		201,660	0	0
HUBSPOT, INC.	COM	443573100	2,901	66,814	SH		SOLE		66,814	0	0
INCONTACT, INC.	COM	45336E109	7,890	569,691	SH		SOLE		569,691	0	0
INFINERA CORPORATION	COM	45667G103	3,486	309,067	SH		SOLE		309,067	0	0
INPHI CORPORATION	COM	45772F107	6,295	196,539	SH		SOLE		196,539	0	0
INSTRUCTURE, INC.	COM	45781U103	2,588	136,198	SH		SOLE		136,198	0	0
J2 GLOBAL, INC.	COM	48123V102	14,422	228,311	SH		SOLE		228,311	0	0
JAZZ PHARMACEUTICALS PLC	COM	G50871105	5,073	35,898	SH		SOLE		35,898	0	0
JETBLUE AIRWAYS CORPORATION	COM	477143101	5,147	310,779	SH		SOLE		310,779	0	0
KONA GRILL, INC.	COM	50047H201	3,390	316,194	SH		SOLE		316,194	0	0
LIFELOCK, INC.	COM	53224V100	7,687	486,186	SH		SOLE		486,186	0	0
LIONBRIDGE TECHNOLOGIES, INC.	COM	536252109	3,693	934,988	SH		SOLE		934,988	0	0
LUMENTUM HOLDINGS, INC.	COM	55024U109	5,517	227,980	SH		SOLE		227,980	0	0
MATCH GROUP, INC.	COM	57665R106	8,103	537,489	SH		SOLE		537,489	0	0
MCKESSON CORPORATION	COM	58155Q103	3,085	16,530	SH		SOLE		16,530	0	0
MERCER INTERNATIONAL, INC.	COM	588056101	1,182	148,139	SH		SOLE		148,139	0	0
MIMECAST LTD.	COM	G14838109	6,348	634,189	SH		SOLE		634,189	0	0
MINERALS TECHNOLOGIES, INC.	COM	603158106	3,454	60,814	SH		SOLE		60,814	0	0
MODEL N, INC.	COM	607525102	7,345	550,184	SH		SOLE		550,184	0	0
MYRIAD GENETICS, INC.	COM	62855J104	5,617	183,565	SH		SOLE		183,565	0	0
NATERA, INC.	COM	632307104	6,274	520,037	SH		SOLE		520,037	0	0
NAVIENT CORPORATION	COM	63938C108	2,541	212,659	SH		SOLE		212,659	0	0
NAVIOS MARITIME ACQUISITION CORPORATION	COM	Y62159101	1,561	994,054	SH		SOLE		994,054	0	0
NEWS CORPORATION	COM	65249B109	8,089	712,726	SH		SOLE		712,726	0	0
NOMAD FOODS LTD.	COM	G6564A105	3,660	458,613	SH		SOLE		458,613	0	0
NXSTAGE MEDICAL, INC.	COM	67072V103	4,679	215,810	SH		SOLE		215,810	0	0
ORION ENGINEERED CARBONS SA	COM	L72967109	5,335	335,728	SH		SOLE		335,728	0	0
OVASCIENCE, INC.	COM	69014Q101	2,087	400,510	SH		SOLE		400,510	0	0
PREMIER, INC.	COM	74051N102	17,671	540,388	SH		SOLE		540,388	0	0
RACKSPACE HOSTING, INC.	COM	750086100	4,515	216,434	SH		SOLE		216,434	0	0
RELYPSA, INC.	COM	759531106	827	44,719	SH		SOLE		44,719	0	0
RINGCENTRAL, INC.	COM	76680R206	14,379	729,139	SH		SOLE		729,139	0	0
SABRE CORPORATION	COM	78573M104	1,474	55,004	SH		SOLE		55,004	0	0
SCIQUEST, INC.	COM	80908T101	2,009	113,781	SH		SOLE		113,781	0	0
SEQUENOM, INC.	COM	817337405	647	708,205	SH		SOLE		708,205	0	0
SERES THERAPEUTICS, INC.	COM	81750R102	3,889	133,883	SH		SOLE		133,883	0	0
SHORETEL, INC.	COM	825211105	8,054	1,203,910	SH		SOLE		1,203,910	0	0
SHUTTERFLY, INC.	COM	82568P304	701	15,046	SH		SOLE		15,046	0	0
SKECHERS USA, INC.	COM	830566105	7,894	265,616	SH		SOLE		265,616	0	0
SLM CORPORATION	COM	78442P106	8,838	1,430,162	SH		SOLE		1,430,162	0	0
SPIRIT AIRLINES, INC.	COM	848577102	5,149	114,755	SH		SOLE		114,755	0	0
SPROUTS FMRS MKT, INC.	COM	85208M102	7,157	312,512	SH		SOLE		312,512	0	0
STAMPS COM, INC.	COM	852857200	27,078	309,742	SH		SOLE		309,742	0	0
STERIS PLC	COM	G84720104	7,577	110,209	SH		SOLE		110,209	0	0
SUPERNUS PHARMACEUTICALS, INC.	COM	868459108	4,375	214,784	SH		SOLE		214,784	0	0
SYNCHRONY FINANCIAL	COM	87165B103	1,634	64,623	SH		SOLE		64,623	0	0
THE GOODYEAR TIRE & RUBBER CO.	COM	382550101	1,027	40,014	SH		SOLE		40,014	0	0
TWITTER, INC.	COM	90184L102	1,147	67,809	SH		SOLE		67,809	0	0
UNITED THERAPEUTICS CORPORATION	COM	91307C102	12,350	116,601	SH		SOLE		116,601	0	0
VCA, INC.	COM	918194101	5,144	76,077	SH		SOLE		76,077	0	0
VIRTUSA CORPORATION	COM	92827P102	9,788	338,921	SH		SOLE		338,921	0	0
VONAGE HOLDINGS CORP.	COM	92886T201	15,616	2,560,023	SH		SOLE		2,560,023	0	0
WAYFAIR, INC.	COM	94419L101	4,830	123,855	SH		SOLE		123,855	0	0
WEB.COM GROUP, INC.	COM	94733A104	3,552	195,359	SH		SOLE		195,359	0	0
WILLIS TOWERS WATSON PLC	COM	G96629103	3,161	25,426	SH		SOLE		25,426	0	0
WIX .COM LTD.	COM	M98068105	2,809	92,562	SH		SOLE		92,562	0	0
WNS (HOLDINGS) LIMITED	COM	92932M101	3,542	131,193	SH		SOLE		131,193	0	0
XO GROUP, INC.	COM	983772104	9,235	529,821	SH		SOLE		529,821	0	0
ZENDESK, INC.	COM	98936J101	6,046	229,170	SH		SOLE		229,170	0	0