Cowen Prime Services 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
Expires:	Oct 31, 2018
Estimated average burden
hours per response:		23.8

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
AT&T INC COM	Stock	00206R102	24	623	SH		SOLE		0	0	24
ABBOTT LABS COM	Stock	002824100	74	1,300	SH		SOLE		0	0	74
ABBVIE INC COM	Stock	00287Y109	77	800	SH		SOLE		0	0	77
ACCURAY INC DEL COM	Stock	004397105	832	193,599	SH		SOLE		0	0	832
ALCOA CORP COM	Stock	013872106	6	111	SH		SOLE		0	0	6
ALIBABA GROUP HLDG LTD SPONSORED ADR ISIN#US01609W1027	Stock	01609W102	34	200	SH		SOLE		0	0	34
ALPHABET INC CAP STK CL C	Stock	02079K107	147	140	SH		SOLE		0	0	147
ALPHABET INC CL A	Stock	02079K305	42	40	SH		SOLE		0	0	42
ALTABA INC COM	Stock	021346101	234	3,356	SH		SOLE		0	0	234
ALTRIA GROUP INC COM	Stock	02209S103	107	1,500	SH		SOLE		0	0	107
AMERICAN ELECTRIC POWER CO	Stock	025537101	335	4,550	SH		SOLE		0	0	335
AMERICAN EXPRESS COMPANY	Stock	025816109	40	400	SH		SOLE		0	0	40
ANALOG DEVICES INC COM	Stock	032654105	1,487	16,700	SH		SOLE		0	0	1,487
ANDEAVOR LOGISTICS LP COM UNIT LTD PARTNERSHIP INT	Stock	03350F106	231	5,000	SH		SOLE		0	0	231
APACHE CORP COM	Stock	037411105	19	450	SH		SOLE		0	0	19
APOLLO GLOBAL MGMT LLC CL A SHS	Stock	037612306	251	7,500	SH		SOLE		0	0	251
APPIAN CORP CL A	Stock	03782L101	6	200	SH		SOLE		0	0	6
APPLE INC COM	Stock	037833100	388	2,295	SH		SOLE		0	0	388
ARCONIC INC COM	Stock	03965L100	9	333	SH		SOLE		0	0	9
ASPEN AEROGELS INC COM	Stock	04523Y105	4,504	922,924	SH		SOLE		0	0	4,504
ASTRAZENECA PLC SPONSORED ADR	Stock	046353108	1,857	53,520	SH		SOLE		0	0	1,857
BRT RLTY TR SH BEN INT NEW	Stock	055645303	189	16,025	SH		SOLE		0	0	189
BANK OF AMERICA CORPORATION COM	Stock	060505104	22	760	SH		SOLE		0	0	22
BANK OF MONTREAL	Stock	063671101	60	753	SH		SOLE		0	0	60
BERKSHIRE HATHAWAY INC DEL CL B NEW	Stock	084670702	2,686	13,550	SH		SOLE		0	0	2,686
BLACKSTONE GROUP L P COM UNIT REPSTG LTD	Stock	09253U108	1,591	49,700	SH		SOLE		0	0	1,591
BOINGO WIRELESS INC COM	Stock	09739C102	279	12,400	SH		SOLE		0	0	279
BOSTON OMAHA CORP CL A	Stock	101044105	2,987	92,207	SH		SOLE		0	0	2,987
BOVIE MED CORP COM	Stock	10211F100	767	295,041	SH		SOLE		0	0	767
BRIGHTHOUSE FINL INC COM	Stock	10922N103	38	654	SH		SOLE		0	0	38
BRISTOL MYERS SQUIBB CO COM	Stock	110122108	496	8,100	SH		SOLE		0	0	496
CUI GLOBAL INC COM NEW	Stock	126576206	259	94,329	SH		SOLE		0	0	259
CALIFORNIA RES CORP COM NEW	Stock	13057Q206	1	26	SH		SOLE		0	0	1
CASTLIGHT HEALTH INC CL B	Stock	14862Q100	5,074	1,353,106	SH		SOLE		0	0	5,074
CATERPILLAR INC COM	Stock	149123101	79	500	SH		SOLE		0	0	79
CEVA INC COM	Stock	157210105	730	15,825	SH		SOLE		0	0	730
CHEMOURS CO COM	Stock	163851108	5	100	SH		SOLE		0	0	5
CISCO SYSTEMS INC	Stock	17275R102	4	100	SH		SOLE		0	0	4
CITIGROUP INC COM NEW ISIN#US1729674242	Stock	172967424	3	35	SH		SOLE		0	0	3
COCA COLA COMPANY	Stock	191216100	344	7,500	SH		SOLE		0	0	344
COLGATE PALMOLIVE CO COM	Stock	194162103	302	4,000	SH		SOLE		0	0	302
COLONY NORTHSTAR INC CL A COM	Stock	19625W104	115	10,073	SH		SOLE		0	0	115
CORNING INC COM	Stock	219350105	37	1,150	SH		SOLE		0	0	37
CROWN CASTLE INTL CORP NEW COM	Stock	22822V101	3,099	27,920	SH		SOLE		0	0	3,099
DCP MIDSTREAM LP COM UTS REPSTG LTD PART INT	Stock	23311P100	58	1,600	SH		SOLE		0	0	58
DXC TECHNOLOGY CO COM	Stock	23355L106	2	16	SH		SOLE		0	0	2
DARDEN RESTAURANTS INC COM	Stock	237194105	24	250	SH		SOLE		0	0	24
DEERE & CO	Stock	244199105	250	1,600	SH		SOLE		0	0	250
DETERMINE INC COM	Stock	250660107	1	700	SH		SOLE		0	0	1
DIGIMARC CORP NEW COM	Stock	25381B101	10,656	294,781	SH		SOLE		0	0	10,656
DOMINION ENERGY INC COM	Stock	25746U109	162	2,000	SH		SOLE		0	0	162
DOWDUPONT INC COM	Stock	26078J100	6,825	95,832	SH		SOLE		0	0	6,825
DURECT CORP COM	Stock	266605104	80	87,128	SH		SOLE		0	0	80
EOG RES INC COM	Stock	26875P101	32	300	SH		SOLE		0	0	32
EATON VANCE TAX MANAGED GLOBAL DIVERSIFIED INCOME FD COM	Stock	27829F108	25	2,700	SH		SOLE		0	0	25
EBAY INC COM	Stock	278642103	38	1,000	SH		SOLE		0	0	38
EHEALTH INC COM	Stock	28238P109	9,667	556,550	SH		SOLE		0	0	9,667
EMERSON ELEC CO COM	Stock	291011104	70	1,000	SH		SOLE		0	0	70
EMPIRE ST RLTY OP L P UNIT LTD PARTNERSHIP INT SER ES	Stock	292102100	267	12,904	SH		SOLE		0	0	267
ENTERPRISE PRODS PARTNERS L P COM UNIT	Stock	293792107	1,566	59,080	SH		SOLE		0	0	1,566
EVERSPIN TECHNOLOGIES INC COM	Stock	30041T104	34	4,500	SH		SOLE		0	0	34
EXELON CORP COM	Stock	30161N101	1,630	41,350	SH		SOLE		0	0	1,630
EXPEDIA INC DEL COM NEW	Stock	30212P303	2,131	17,795	SH		SOLE		0	0	2,131
EXXON MOBIL CORP COM	Stock	30231G102	608	7,270	SH		SOLE		0	0	608
FACEBOOK INC CL A	Stock	30303M102	88	500	SH		SOLE		0	0	88
FOREST CITY RLTY TR INC COM CL A	Stock	345605109	1,879	77,950	SH		SOLE		0	0	1,879
FORMFACTOR INC COM	Stock	346375108	92	5,852	SH		SOLE		0	0	92
GTT COMMUNICATIONS INC COM	Stock	362393100	47	1,000	SH		SOLE		0	0	47
GSI TECHNOLOGY INC COM	Stock	36241U106	247	31,084	SH		SOLE		0	0	247
GENERAL ELECTRIC CO COM	Stock	369604103	279	15,970	SH		SOLE		0	0	279
GENERAL MILLS INC COM	Stock	370334104	166	2,800	SH		SOLE		0	0	166
GENOMIC HEALTH INC COM	Stock	37244C101	3,782	110,598	SH		SOLE		0	0	3,782
GLAXOSMITHKLINE PLC SPONS ADR	Stock	37733W105	71	2,000	SH		SOLE		0	0	71
GLOBAL PARTNERS LP COM UNIT REPSTG LTD PARTNER INT	Stock	37946R109	69	4,150	SH		SOLE		0	0	69
HCP INC COM	Stock	40414L109	209	8,000	SH		SOLE		0	0	209
HP INC COM	Stock	40434L105	4	200	SH		SOLE		0	0	4
HALLIBURTON CO COM	Stock	406216101	5	100	SH		SOLE		0	0	5
HARMONIC INC COM	Stock	413160102	1,248	297,059	SH		SOLE		0	0	1,248
HARMONIC INC FXD RT NOTES 4 12 01 20 BE DTD 12 14 15	Stock	413160AB8	4,070	4,060,000	SH		SOLE		0	0	4,070
HELMERICH & PAYNE INC COM	Stock	423452101	52	800	SH		SOLE		0	0	52
HEWLETT PACKARD ENTERPRISE CO COM	Stock	42824C109	3	200	SH		SOLE		0	0	3
INOVALON HLDGS INC COM CL A	Stock	45781D101	3,209	213,900	SH		SOLE		0	0	3,209
INTEL CORP COM	Stock	458140100	74	1,600	SH		SOLE		0	0	74
INTERMOLECULAR INC COM	Stock	45882D109	4	3,000	SH		SOLE		0	0	4
INTERNATIONAL BUSINESS MACHS CORP COM	Stock	459200101	474	3,092	SH		SOLE		0	0	474
INVUITY INC COM NEW	Stock	46187J205	1,854	299,050	SH		SOLE		0	0	1,854
ITERIS INC NEW COM	Stock	46564T107	5,419	777,492	SH		SOLE		0	0	5,419
JP MORGAN CHASE & CO COM ISIN#US46625H1005	Stock	46625H100	2,093	19,569	SH		SOLE		0	0	2,093
JOHNSON & JOHNSON COM	Stock	478160104	1,639	11,734	SH		SOLE		0	0	1,639
KKR & CO L P DEL COM UNITS	Stock	48248M102	2,008	95,350	SH		SOLE		0	0	2,008
KIMBERLY CLARK CORP COM	Stock	494368103	109	900	SH		SOLE		0	0	109
KINDER MORGAN INC DEL COM	Stock	49456B101	1,830	101,266	SH		SOLE		0	0	1,830
KINDER MORGAN INC DEL DEPOSITARY SHS REPSTG 1/20TH PFD CONV SER A 9 75 MATY 10 26 2018	Stock	49456B200	118	3,100	SH		SOLE		0	0	118
KOPIN CORP COM	Stock	500600101	725	226,416	SH		SOLE		0	0	725
LEIDOS HLDGS INC COM	Stock	525327102	4,081	63,210	SH		SOLE		0	0	4,081
LENDINGCLUB CORP COM	Stock	52603A109	667	161,567	SH		SOLE		0	0	667
LENNAR CORP CL A	Stock	526057104	95	1,500	SH		SOLE		0	0	95
LENNAR CORP CL B	Stock	526057302	2	30	SH		SOLE		0	0	2
LOCKHEED MARTIN CORP COM	Stock	539830109	128	400	SH		SOLE		0	0	128
LOWES COS INC COM	Stock	548661107	32	340	SH		SOLE		0	0	32
LUMINEX CORP DEL COM	Stock	55027E102	4,865	246,962	SH		SOLE		0	0	4,865
MACOM TECHNOLOGY SOLUTIONS HLDGS INC COM	Stock	55405Y100	295	9,060	SH		SOLE		0	0	295
MACERICH CO COM	Stock	554382101	263	4,000	SH		SOLE		0	0	263
MACQUARIE INFRASTRUCTURE CORP SHS	Stock	55608B105	161	2,500	SH		SOLE		0	0	161
MAGELLAN MIDSTREAM PARTNERS LP COM UNIT REPSTG LTD PARTNER INT	Stock	559080106	2,469	34,800	SH		SOLE		0	0	2,469
MARKEL CORP COM	Stock	570535104	171	150	SH		SOLE		0	0	171
MCDONALDS CORP	Stock	580135101	110	640	SH		SOLE		0	0	110
MERCK & CO INC NEW COM	Stock	58933Y105	23	400	SH		SOLE		0	0	23
METLIFE INC COM	Stock	59156R108	417	8,250	SH		SOLE		0	0	417
MICRO FOCUS INTL PLC SPONS ADR NEW ISIN# US5948373049	Stock	594837304	1	26	SH		SOLE		0	0	1
MICROSOFT CORP COM	Stock	594918104	1,225	14,325	SH		SOLE		0	0	1,225
MICROVISION INC DEL COM NEW	Stock	594960304	34	20,800	SH		SOLE		0	0	34
MOBILEIRON INC COM NEW	Stock	60739U204	2,511	643,800	SH		SOLE		0	0	2,511
MONDELEZ INTL INC CL A	Stock	609207105	141	3,300	SH		SOLE		0	0	141
MORGAN STANLEY COM NEW	Stock	617446448	1	18	SH		SOLE		0	0	1
NIC INC COM	Stock	62914B100	976	58,800	SH		SOLE		0	0	976
NVE CORP COM NEW ISIN#US6294452064	Stock	629445206	734	8,531	SH		SOLE		0	0	734
NATIONAL RESH CORP CL A	Stock	637372202	604	16,200	SH		SOLE		0	0	604
NATIONAL RETAIL PPTYS INC COM ISIN#US6374171063	Stock	637417106	43	1,000	SH		SOLE		0	0	43
NEOGEN CORP COM	Stock	640491106	688	8,370	SH		SOLE		0	0	688
NEOGENOMICS INC COM NEW	Stock	64049M209	10,106	1,140,589	SH		SOLE		0	0	10,106
NEW MEDIA INVT GROUP INC COM	Stock	64704V106	1,599	95,300	SH		SOLE		0	0	1,599
NEW RESIDENTIAL INVT CORP COM NEW	Stock	64828T201	80	4,500	SH		SOLE		0	0	80
NOKIA CORP SPONSORED ADR	Stock	654902204	1	166	SH		SOLE		0	0	1
NORFOLK SOUTHN CORP COM	Stock	655844108	232	1,600	SH		SOLE		0	0	232
NORTHROP GRUMMAN CORP COM	Stock	666807102	138	450	SH		SOLE		0	0	138
NORTHSTAR RLTY EUROPE CORP COM	Stock	66706L101	15	1,083	SH		SOLE		0	0	15
NOVARTIS AG SPONSORED ADR	Stock	66987V109	8	100	SH		SOLE		0	0	8
NOVO NORDISK A.S. ADR FORMERLY NOVO INDUSTRIE A.S. ADR SAME CUSIP	Stock	670100205	174	3,250	SH		SOLE		0	0	174
NUSTAR ENERGY LP UNIT COM	Stock	67058H102	169	5,630	SH		SOLE		0	0	169
NUTANIX INC COM	Stock	67059N108	721	20,450	SH		SOLE		0	0	721
OCCIDENTAL PETE CORP COM	Stock	674599105	41	550	SH		SOLE		0	0	41
ORACLE CORP COM	Stock	68389X105	19	394	SH		SOLE		0	0	19
PDF SOLUTIONS INC COM	Stock	693282105	18,992	1,209,700	SH		SOLE		0	0	18,992
PRGX GLOBAL INTL COM NEW	Stock	69357C503	348	49,054	SH		SOLE		0	0	348
PTC INC COM	Stock	69370C100	1,948	32,050	SH		SOLE		0	0	1,948
PAYCHEX INC COM	Stock	704326107	163	2,400	SH		SOLE		0	0	163
PAYPAL HLDGS INC COM	Stock	70450Y103	76	1,034	SH		SOLE		0	0	76
PEPSICO INC COM	Stock	713448108	108	900	SH		SOLE		0	0	108
PFIZER INC COM	Stock	717081103	4,367	120,560	SH		SOLE		0	0	4,367
PHILIP MORRIS INTL INC COM	Stock	718172109	106	1,000	SH		SOLE		0	0	106
PIONEER ENERGY SVCS CORP COM	Stock	723664108	1	175	SH		SOLE		0	0	1
PLAINS ALL AMERICAN PIPELINE L P UNIT LTD PARTNERSHIP INT	Stock	726503105	117	5,685	SH		SOLE		0	0	117
PROCTER & GAMBLE CO COM	Stock	742718109	211	2,300	SH		SOLE		0	0	211
QUALITY CARE PPTYS INC COM	Stock	747545101	8	600	SH		SOLE		0	0	8
QUOTIENT TECHNOLOGY INC COM	Stock	749119103	12,089	1,028,850	SH		SOLE		0	0	12,089
REIS INC COM	Stock	75936P105	5,905	285,963	SH		SOLE		0	0	5,905
REVOLUTION LTG TECHNOLOGIES INC COM NEW	Stock	76155G206	163	49,600	SH		SOLE		0	0	163
RIBBON COMMUNICATIONS INC COM	Stock	762544104	4,398	568,932	SH		SOLE		0	0	4,398
RUBICON PROJ INC COM	Stock	78112V102	281	150,000	SH		SOLE		0	0	281
SPDR GOLD TR GOLD SHS	Stock	78463V107	20	160	SH		SOLE		0	0	20
SCHLUMBERGER LTD COM ISIN# AN8068571086	Stock	806857108	56	835	SH		SOLE		0	0	56
SEMPRA ENERGY COM	Stock	816851109	86	800	SH		SOLE		0	0	86
SENOMYX INC COM	Stock	81724Q107	959	737,441	SH		SOLE		0	0	959
SMITH MICRO SOFTWARE INC COM NEW	Stock	832154207	145	51,194	SH		SOLE		0	0	145
SUBURBAN PROPANE PARTNERS L P UNIT LTD PARTNERSHIP INT	Stock	864482104	134	5,513	SH		SOLE		0	0	134
SYNACOR INC COM	Stock	871561106	340	147,673	SH		SOLE		0	0	340
SYSCO CORP COM	Stock	871829107	85	1,400	SH		SOLE		0	0	85
TICC CAP CORP COM	Stock	87244T109	44	7,600	SH		SOLE		0	0	44
TARGA RES CORP COM	Stock	87612G101	21	434	SH		SOLE		0	0	21
TEVA PHARMACEUTICAL INDUSTRIES LTD ADR ISIN#US8816242098	Stock	881624209	1,348	71,139	SH		SOLE		0	0	1,348
TEXAS INSTRUMENTS INC	Stock	882508104	315	3,012	SH		SOLE		0	0	315
3D SYS CORP DEL COM NEW	Stock	88554D205	958	110,916	SH		SOLE		0	0	958
3M CO COM	Stock	88579Y101	435	1,850	SH		SOLE		0	0	435
TRANSACT TECHNOLOGIES INC COM	Stock	892918103	2,119	159,952	SH		SOLE		0	0	2,119
TRUECAR INC COM	Stock	89785L107	2,077	185,480	SH		SOLE		0	0	2,077
TYME TECHNOLOGIES INC COM	Stock	90238J103	32	5,000	SH		SOLE		0	0	32
UNILEVER PLC SPON ADR NEW ISIN#US9047677045	Stock	904767704	80	1,445	SH		SOLE		0	0	80
UNITED CONTL HLDGS INC COM	Stock	910047109	2,447	36,310	SH		SOLE		0	0	2,447
UNITED PARCEL SVC INC CL B	Stock	911312106	1,830	15,360	SH		SOLE		0	0	1,830
UNITEDHEALTH GROUP INC COM	Stock	91324P102	110	500	SH		SOLE		0	0	110
VEON LTD SPONSORED ADR ISIN#US91822M1062	Stock	91822M106	2	450	SH		SOLE		0	0	2
VALEANT PHARMACEUTICALS INTL INC CDA COM ISIN#CA91911K1021	Stock	91911K102	1	26	SH		SOLE		0	0	1
VANECK VECTORS ETF TR GOLD MINERS ETF	Stock	92189F106	70	3,000	SH		SOLE		0	0	70
VANECK VECTORS ETF TR JR GOLD MINERS ETF	Stock	92189F791	1	35	SH		SOLE		0	0	1
VENTAS INC COM	Stock	92276F100	24	400	SH		SOLE		0	0	24
VERIZON COMMUNICATIONS INC COM	Stock	92343V104	267	5,051	SH		SOLE		0	0	267
VODAFONE GROUP PLC NEW SPONSORED ADR NO PAR	Stock	92857W308	52	1,636	SH		SOLE		0	0	52
VONAGE HLDGS CORP COM	Stock	92886T201	4,628	455,100	SH		SOLE		0	0	4,628
WEC ENERGY GROUP INC COM	Stock	92939U106	166	2,500	SH		SOLE		0	0	166
WESTERN GAS PARTNERS LP COM UNIT REPSTG LTD PARTNER INT	Stock	958254104	120	2,500	SH		SOLE		0	0	120
WEYERHAEUSER CO	Stock	962166104	1,866	52,930	SH		SOLE		0	0	1,866
WILLIAMS COS INC COM	Stock	969457100	30	1,000	SH		SOLE		0	0	30
YUM BRANDS INC COM	Stock	988498101	2,159	26,450	SH		SOLE		0	0	2,159
ZOETIS INC CL A	Stock	98978V103	2,050	28,460	SH		SOLE		0	0	2,050
ALLEGION PUB LTD CO ORD SHS ISIN#IE00BFRT3W74	Stock	G0176J109	79	999	SH		SOLE		0	0	79
ALLERGAN PLC COM SHS ISIN#IE00BY9D5467	Stock	G0177J108	30	181	SH		SOLE		0	0	30
HERBALIFE LTD USD COM SHS ISIN#KYG4412G1010	Stock	G4412G101	68	1,000	SH		SOLE		0	0	68
INGERSOLL RAND PLC SHS ISIN#IE00B6330302	Stock	G47791101	254	2,850	SH		SOLE		0	0	254
NOBLE CORP PLC SHS USD ISIN#GB00BFG3KF26	Stock	G65431101	4	800	SH		SOLE		0	0	4
SEAGATE TECHNOLOGY PLC SHS ISIN#IE00B58JVZ52	Stock	G7945M107	96	2,300	SH		SOLE		0	0	96
KORNIT-DIGITAL LTD SHS ISIN#IL0011216723	Stock	M6372Q113	415	25,677	SH		SOLE		0	0	415
CIMPRESS N V SHS EURO ISIN#NL0009272269	Stock	N20146101	12	100	SH		SOLE		0	0	12