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
51JOB, INC.	COM	316827104	603	13,489	SH		SOLE		13,489	0	0
ABIOMED, INC.	COM	003654100	8,695	60,676	SH		SOLE		60,676	0	0
ADOBE SYSTEMS, INC.	COM	00724F101	4,231	29,917	SH		SOLE		29,917	0	0
AKAMAI TECHNOLOGIES, INC.	COM	00971T101	2,020	40,560	SH		SOLE		40,560	0	0
ALARM.COM HOLDINGS, INC.	COM	011642105	2,565	68,169	SH		SOLE		68,169	0	0
ALCOA CORPORATION	COM	013872106	4,480	137,227	SH		SOLE		137,227	0	0
ALPHABET, INC.	COM	02079K107	13,507	14,864	SH		SOLE		14,864	0	0
ALTISOURCE RESIDENTIAL CORPORATION	COM	02153W100	3,282	253,624	SH		SOLE		253,624	0	0
ANGIE'S LIST, INC.	COM	034754101	2,196	171,707	SH		SOLE		171,707	0	0
ANIKA THERAPEUTICS, INC.	COM	035255108	719	14,566	SH		SOLE		14,566	0	0
APPLIED OPTOELECTRONICS, INC.	COM	03823U102	2,378	38,489	SH		SOLE		38,489	0	0
APPROACH RESOURCES, INC.	COM	03834A103	1,929	572,373	SH		SOLE		572,373	0	0
APPTIO, INC.	COM	03835C108	11,003	634,177	SH		SOLE		634,177	0	0
ARDMORE SHIPPING CORPORATION	COM	Y0207T100	3,756	460,874	SH		SOLE		460,874	0	0
ASSURED GUARANTY LTD.	COM	G0585R106	786	18,821	SH		SOLE		18,821	0	0
ATHENAHEALTH, INC.	COM	04685W103	3,043	21,653	SH		SOLE		21,653	0	0
AVADEL PHARMACEUTICALS PLC	COM	05337M104	1,437	130,311	SH		SOLE		130,311	0	0
AXON ENTERPRISE, INC.	COM	05464C101	16,670	663,067	SH		SOLE		663,067	0	0
BARRACUDA NETWORKS, INC.	COM	068323104	4,411	191,286	SH		SOLE		191,286	0	0
BIO-RAD LABORATORIES, INC.	COM	090572207	20,126	88,931	SH		SOLE		88,931	0	0
BOINGO WIRELESS, INC.	COM	09739C102	17,995	1,202,853	SH		SOLE		1,202,853	0	0
BOX, INC.	COM	10316T104	10,732	588,356	SH		SOLE		588,356	0	0
BROOKDALE SENIOR LIVING, INC.	COM	112463104	4,617	313,852	SH		SOLE		313,852	0	0
CALAVO GROWERS, INC.	COM	128246105	4,344	62,912	SH		SOLE		62,912	0	0
CALLIDUS SOFTWARE, INC.	COM	13123E500	28,061	1,159,548	SH		SOLE		1,159,548	0	0
CAPITAL SENIOR LIVING CORPORATION	COM	140475104	4,009	263,551	SH		SOLE		263,551	0	0
CARBONITE, INC.	COM	141337105	14,924	684,602	SH		SOLE		684,602	0	0
CARE.COM, INC.	COM	141633107	22,111	1,464,275	SH		SOLE		1,464,275	0	0
CARROLS RESTAURANT GROUP, INC.	COM	14574X104	630	51,431	SH		SOLE		51,431	0	0
CASELLA WASTE SYSTEMS, INC.	COM	147448104	40,733	2,482,221	SH		SOLE		2,482,221	0	0
CENTRAL GARDEN & PET COMPANY	COM	153527106	12,407	390,278	SH		SOLE		390,278	0	0
CENTURY ALUMINUM COMPANY	COM	156431108	7,546	484,368	SH		SOLE		484,368	0	0
CITIZENS FINANCIAL GROUP, INC.	COM	174610105	1,740	48,778	SH		SOLE		48,778	0	0
COMERICA INCORPORATED	COM	200340107	4,997	68,234	SH		SOLE		68,234	0	0
CONNS, INC.	COM	208242107	4,156	217,566	SH		SOLE		217,566	0	0
CONSTELLIUM NV	COM	N22035104	981	142,223	SH		SOLE		142,223	0	0
COSTAMARE, INC.	COM	Y1771G102	6,133	838,953	SH		SOLE		838,953	0	0
COTT CORP.	COM	22163N106	12,747	882,784	SH		SOLE		882,784	0	0
COVENANT TRANSPORTATION GROUP, INC.	COM	22284P105	3,048	173,862	SH		SOLE		173,862	0	0
CPI CARD GROUP, INC.	COM	12634H101	101	35,500	SH		SOLE		35,500	0	0
CRYOLIFE, INC.	COM	228903100	2,037	102,119	SH		SOLE		102,119	0	0
EBIX, INC.	COM	278715206	3,584	66,499	SH		SOLE		66,499	0	0
ELECTRONIC ARTS	COM	285512109	2,502	23,670	SH		SOLE		23,670	0	0
ELLIE MAE, INC.	COM	28849P100	8,618	78,408	SH		SOLE		78,408	0	0
EMCORE CORPORATION	COM	290846203	10,786	1,012,799	SH		SOLE		1,012,799	0	0
EURONET WORLDWIDE, INC.	COM	298736109	9,394	107,519	SH		SOLE		107,519	0	0
FABRINET	COM	G3323L100	8,512	199,520	SH		SOLE		199,520	0	0
FACEBOOK, INC.	COM	30303M102	6,958	46,088	SH		SOLE		46,088	0	0
FIESTA RESTAURANT GROUP, INC.	COM	31660B101	2,778	134,536	SH		SOLE		134,536	0	0
FIFTH THIRD BANCORP	COM	316773100	5,294	203,915	SH		SOLE		203,915	0	0
FIVE STAR SENIOR LIVING, INC.	COM	33832D106	1,451	967,349	SH		SOLE		967,349	0	0
FIVE9, INC.	COM	338307101	6,880	319,703	SH		SOLE		319,703	0	0
GASTAR EXPLORATION, INC.	COM	36729W202	1,593	1,720,590	SH		SOLE		1,720,590	0	0
GODADDY.COM, INC.	COM	380237107	7,075	166,774	SH		SOLE		166,774	0	0
GULFPORT ENERGY CORPORATION	COM	402635304	9,071	614,986	SH		SOLE		614,986	0	0
HORTONWORKS, INC.	COM	440894103	20,604	1,599,724	SH		SOLE		1,599,724	0	0
HUBSPOT, INC.	COM	443573100	1,046	15,912	SH		SOLE		15,912	0	0
INPHI CORPORATION	COM	45772F107	5,742	167,401	SH		SOLE		167,401	0	0
INSTRUCTURE, INC.	COM	45781U103	14,978	507,740	SH		SOLE		507,740	0	0
INTERNAP CORPORATION	COM	45885A300	2,044	557,080	SH		SOLE		557,080	0	0
INTREPID POTASH, INC.	COM	46121Y102	435	192,447	SH		SOLE		192,447	0	0
ITERIS, INC.	COM	46564T107	1,193	191,879	SH		SOLE		191,879	0	0
J B HUNT TRANSPORT SERVICES, INC.	COM	445658107	6,429	70,354	SH		SOLE		70,354	0	0
J2 GLOBAL, INC.	COM	48123V102	1,791	21,048	SH		SOLE		21,048	0	0
KAPSTONE PAPER AND PACKAGING CORPORATION	COM	48562P103	9,176	444,771	SH		SOLE		444,771	0	0
KNIGHT TRANSPORTATION, INC.	COM	499064103	6,261	168,998	SH		SOLE		168,998	0	0
KVH INDUSTRIES, INC.	COM	482738101	3,061	322,258	SH		SOLE		322,258	0	0
LENDINGTREE, INC.	COM	52603B107	4,275	24,828	SH		SOLE		24,828	0	0
LKQ CORPORATION	COM	501889208	6,918	209,968	SH		SOLE		209,968	0	0
MACOM TECHNOLOGY SOLUTIONS	COM	55405Y100	8,902	159,626	SH		SOLE		159,626	0	0
MATCH GROUP, INC.	COM	57665R106	10,020	576,524	SH		SOLE		576,524	0	0
MAXWELL TECHNOLOGIES, INC.	COM	577767106	2,533	422,865	SH		SOLE		422,865	0	0
MERCER INTERNATIONAL, INC.	COM	588056101	2,181	189,619	SH		SOLE		189,619	0	0
MIMECAST LIMITED	COM	G14838109	4,313	161,057	SH		SOLE		161,057	0	0
NETGEAR, INC.	COM	64111Q104	4,025	93,392	SH		SOLE		93,392	0	0
NEW RELIC, INC.	COM	64829B100	5,494	127,746	SH		SOLE		127,746	0	0
NOMAD FOODS LIMITED	COM	G6564A105	16,988	1,203,998	SH		SOLE		1,203,998	0	0
NUANCE COMMUNICATIONS, INC.	COM	67020Y100	4,361	250,460	SH		SOLE		250,460	0	0
NUTANIX, INC.	COM	67059N108	4,621	229,330	SH		SOLE		229,330	0	0
NXSTAGE MEDICAL, INC.	COM	67072V103	12,339	492,188	SH		SOLE		492,188	0	0
OCLARO, INC.	COM	67555N206	4,935	528,420	SH		SOLE		528,420	0	0
ON DECK CAPITAL, INC.	COM	682163100	5,177	1,110,933	SH		SOLE		1,110,933	0	0
ORION ENGINEERED CARBONS S.A.	COM	L72967109	2,711	135,903	SH		SOLE		135,903	0	0
OVERSTOCK.COM, INC.	COM	690370101	2,229	136,722	SH		SOLE		136,722	0	0
PACKAGING CORPORATION OF AMERICA	COM	695156109	3,935	35,324	SH		SOLE		35,324	0	0
PACWEST BANCORP	COM	695263103	8,171	174,965	SH		SOLE		174,965	0	0
PAYPAL HOLDINGS, INC.	COM	70450Y103	6,880	128,189	SH		SOLE		128,189	0	0
PRIMO WATER CORPORATION	COM	74165N105	11,652	917,515	SH		SOLE		917,515	0	0
QAD, INC.	COM	74727D306	6,749	210,574	SH		SOLE		210,574	0	0
QUALYS, INC.	COM	74758T303	6,351	155,668	SH		SOLE		155,668	0	0
REALPAGE, INC.	COM	75606N109	5,089	141,561	SH		SOLE		141,561	0	0
RED LION HOTELS CORPORATION	COM	756764106	1,205	163,968	SH		SOLE		163,968	0	0
RESOLUTE ENERGY CORPORATION	COM	76116A306	9,954	334,349	SH		SOLE		334,349	0	0
RH	COM	74967X103	6,096	94,479	SH		SOLE		94,479	0	0
RINGCENTRAL, INC.	COM	76680R206	8,562	234,250	SH		SOLE		234,250	0	0
RYERSON HOLDING CORPORATION	COM	783754104	18,021	1,820,320	SH		SOLE		1,820,320	0	0
SCORPIO TANKERS, INC.	COM	Y7542C106	8,652	2,179,467	SH		SOLE		2,179,467	0	0
SKECHERS USA, INC.	COM	830566105	13,979	473,869	SH		SOLE		473,869	0	0
SLM CORPORATION	COM	78442P106	22,607	1,965,850	SH		SOLE		1,965,850	0	0
SMART & FINAL STORES, INC.	COM	83190B101	2,072	227,675	SH		SOLE		227,675	0	0
SQUARE, INC.	COM	852234103	2,242	95,577	SH		SOLE		95,577	0	0
STAMPS.COM, INC.	COM	852857200	9,375	60,530	SH		SOLE		60,530	0	0
SVB FINANCIAL GROUP	COM	78486Q101	4,758	27,066	SH		SOLE		27,066	0	0
SYSTEMAX, INC.	COM	871851101	3,574	190,102	SH		SOLE		190,102	0	0
TELENAV, INC.	COM	879455103	2,042	252,061	SH		SOLE		252,061	0	0
TEXTAINER GROUP HOLDINGS LIMITED	COM	G8766E109	4,139	285,432	SH		SOLE		285,432	0	0
TRITON INTERNATIONAL LIMITED	COM	G9078F107	2,542	76,002	SH		SOLE		76,002	0	0
TRONOX LIMITED	COM	Q9235V101	5,194	343,515	SH		SOLE		343,515	0	0
U.S. AUTO PARTS NETWORK, INC.	COM	90343C100	7,312	2,263,689	SH		SOLE		2,263,689	0	0
USA TRUCK, INC.	COM	902925106	3,863	446,090	SH		SOLE		446,090	0	0
VIRTUSA CORPORATION	COM	92827P102	5,261	178,943	SH		SOLE		178,943	0	0
VONAGE HOLDINGS CORP.	COM	92886T201	3,287	502,614	SH		SOLE		502,614	0	0
VOYA FINANCIAL, INC.	COM	929089100	6,813	184,683	SH		SOLE		184,683	0	0
WINTRUST FINANCIAL CORPORATION	COM	97650W108	3,985	52,134	SH		SOLE		52,134	0	0
WIX.COM LTD.	COM	M98068105	2,098	30,142	SH		SOLE		30,142	0	0
XO GROUP, INC.	COM	983772104	948	53,800	SH		SOLE		53,800	0	0
ZENDESK, INC.	COM	98936J101	659	23,725	SH		SOLE		23,725	0	0