Austin W. Marxe and David M. Greenhouse

Austin W. Marxe and David M. Greenhouse as of March 31, 2013

Portfolio Holdings for Austin W. Marxe and David M. Greenhouse

Austin W. Marxe and David M. Greenhouse holds 0 positions in its portfolio as reported in the March 2013 quarterly 13F filing

                FORM
13F INFORMATION TABLE
                                                           VALUE
SHARES/  SH/ PUT/ INVSTMT OTHER    VOTING  AUTHORITY
        NAME OF ISSUER          TITLE OF CLASS    CUSIP   (x$1000) PRN
AMT  PRN CALL DSCRETN MANAGERS SOLE    SHARED   NONE
------------------------------ ---------------- --------- -------- ------
-- --- ---- ------- -------- ------- -------- ----
{S}                            {C}              {C}       {C}      {C}
{C} {C}  {C}     {C}          {C}     {C}  {C}

ANADIGICS, Inc.                common           032515108     3300
1650000 SH       SOLE               1650000
ARI Network Services, Inc(Rest)common           001930205      609
300000 SH       SOLE                300000
Aastrom Bioscience, Inc.       common           00253U107      350
500000 SH       SOLE                500000
Active Power, Inc.             common           00504W100      692
150772 SH       SOLE                150772
Adept Technology, Inc.         common           006854202     6375
2183057 SH       SOLE               2183057
Aerovironment, Inc.            common           008073108     4382
241705 SH       SOLE                241705
Alco Stores, Inc.              common           001600105     4378
584512 SH       SOLE                584512
Allon Therapeutics, Inc.       common           019774108        2
500500 SH       SOLE                500500
Alphatec Holdings, Inc.        common           02081G102     5882
2787691 SH       SOLE               2787691
Avantair, Inc.                 common           05350T101      758
6315791 SH       SOLE               6315791
BG Medicine, Inc.              common           08861T107     3720
2000000 SH       SOLE               2000000
BTU International Corp.        common           056032105     2549
1123045 SH       SOLE               1123045
Brightcove, Inc.               common           075097042     7524
1211523 SH       SOLE               1211523
Broadwind Energy Inc.          common           11161T108    12767
2921544 SH       SOLE               2921544
CEVA, Inc.                     common           157210105    19821
1270582 SH       SOLE               1270582
CPI Aerostructures, Inc.       common           125919308     7979
931040 SH       SOLE                931040
CTPartners Executive Search    common           22945C105      794
211633 SH       SOLE                211633
Callidus Software              common           13123E500     2134
467054 SH       SOLE                467054
Carbon Natural Gas Co.         common           14115T109     7078
10888889 SH       SOLE              10888889
CardioNet, Inc.                common           14159L103      775
318882 SH       SOLE                318882
Chase Packaging Corporation    common           161635107        5
684954 SH       SOLE                684954
ChinaCast Education Corp       common           16946T109      105
996207 SH       SOLE                996207
Cimatron Ltd. (Israel)         common           M23798107     1675
270240 SH       SOLE                270240
Clean Diesel Technologies, Inc common           18449C401      805
369196 SH       SOLE                369196
Coastal Contacts,Inc.          common           19044R207     2714
434200 SH       SOLE                434200
Constant Contact Inc.          common           210313102     4244
326927 SH       SOLE                326927
Crumbs Bake Shop Inc.          common           316816107     6625
2316485 SH       SOLE               2316485
DSP Group, Inc.                common           23332B106     4070
504334 SH       SOLE                504334
Daegis Inc                     common           904743200     2207
1935627 SH       SOLE               1935627
Destination Maternity Corp.    common           25065D100     7017
299864 SH       SOLE                299864
Digimarc Corporation           common           25381B101     1465
66702 SH       SOLE                 66702
E-Ink Holdings Incorporated    common           Not Avail     8487
11030745 SH       SOLE              11030745
Ecotality, Inc.                common           27922Y202     1510
1615488 SH       SOLE               1615488
Ellie Mae, Inc.                common           28849P100     9855
409769 SH       SOLE                409769
Endocyte, Inc.                 common           29269A102    11610
932559 SH       SOLE                932559
Entropic Communications, Inc.  common           29384R105    16953
4165446 SH       SOLE               4165446
Enzo Biochem, Inc.             common           294100102     4133
1640166 SH       SOLE               1640166
EpiCept Corporation            common           294264304       71
839038 SH       SOLE                839038
Erickson Air-Crane, Inc.       common           29482P100    15467
951244 SH       SOLE                951244
Extreme Networks, Inc.         common           30226D106     3179
943198 SH       SOLE                943198
Familymeds Group, Inc.         common           30706T209       24
1143889 SH       SOLE               1143889
Flow International Corp        common           343468104     6773
1732190 SH       SOLE               1732190
Fuelcell Energy Inc.           common           35952H106     2526
2676288 SH       SOLE               2676288
Full House Resorts Inc.        common           359678109     5046
1802140 SH       SOLE               1802140
GeneNews, Ltd. (Canada) (CF)   common           36870T107     2053
2397846 SH       SOLE               2397846
GeneNews, Ltd. (Rest- Reg S)   common           36870T107      580
689898 SH       SOLE                689898
Global Power Equipment Group   common           37941P306     1145
65000 SH       SOLE                 65000
GraphOn Corporation            common           388707101     3791
6016900 SH       SOLE               6016900
Graymark Healthcare Inc.       common           389465303     1250
3571000 SH       SOLE               3571000
Hamilton Thorne, Ltd.(Canada)  common           Not Avail      328
8356544 SH       SOLE               8356544
Here Media, Inc.               common           427105101      391
1029462 SH       SOLE               1029462
Image Sensing Systems, Inc.    common           45244C104     5138
1109646 SH       SOLE               1109646
Incontact Inc.                 common           45336E109    11167
1380324 SH       SOLE               1380324
Infusystem Holdings, Inc.      common           45685K102     1464
841101 SH       SOLE                841101
Inovio Pharmaceuticals, Inc.   common           45773H102      356
598379 SH       SOLE                598379
Integral Vision, Inc.          common           45811H106        6
1850000 SH       SOLE               1850000
Integrated Device Technology   common           458118106      934
125000 SH       SOLE                125000
Intermap Technologies Corp     common           458977204     7033
15051204 SH       SOLE              15051204
Interplay Entertainment Corp.  common           460615107      100
9133000 SH       SOLE               9133000
Iteris, Inc.                   common           46564T107     6028
3312109 SH       SOLE               3312109
KMG Chemicals, Inc.            common           482564101    11734
603582 SH       SOLE                603582
Kalobios Pharmaceuticals, Inc. common           48344T100     2734
455669 SH       SOLE                455669
Kopin Corporation              common           500600101    22352
6041147 SH       SOLE               6041147
LRAD Corporation               common           50213V109     4145
3985271 SH       SOLE               3985271
Lemaitre Vascular Inc.         common           525558201     1901
311617 SH       SOLE                311617
Lightbridge Corporation        common           53224K104     2381
1384032 SH       SOLE               1384032
MYR-Group Inc.                 common           55405W104    10564
430125 SH       SOLE                430125
MagneTek, Inc.                 common           559424403     4831
345802 SH       SOLE                345802
Manitex Int'l Inc.             common           563420108     2457
197961 SH       SOLE                197961
Market Leader Inc.             common           57056R103     5022
560445 SH       SOLE                560445
MaxLinear, Inc.                common           57776J100     5303
855371 SH       SOLE                855371
Memsic, Inc.                   common           586264103     2245
825495 SH       SOLE                825495
MicroFinancial Incorporated    common           595072109    12630
1498272 SH       SOLE               1498272
Move, Inc.                     common           62458M207     2275
190400 SH       SOLE                190400
Multiband Corporation          common           62544X209     3856
1574029 SH       SOLE               1574029
NeoPhotonics Corporation       common           64051T100     2544
497903 SH       SOLE                497903
Neonode, Inc.                  common           64051M402     5352
927550 SH       SOLE                927550
OmniVision Technologies, Inc.  common           682128103    13251
961607 SH       SOLE                961607
Oncolytics Biotech, Inc.       common           682310107     3090
1000000 SH       SOLE               1000000
Ossen Innovation Co. Spon-ADR  common           688410109      857
1098273 SH       SOLE               1098273
Overland Storage, Inc.         common           690310206     3741
3143459 SH       SOLE               3143459
PC-Tel, Inc.                   common           69325Q105     8032
1131293 SH       SOLE               1131293
PRGX Global, Inc.              common           69357C503     7545
1085600 SH       SOLE               1085600
Pacira Pharmaceuticals, Inc.   common           695127100    20054
694889 SH       SOLE                694889
ParkerVision, Inc.             common           701354102    24780
6752060 SH       SOLE               6752060
Pfsweb, Inc.                   common           717098206     9789
2441165 SH       SOLE               2441165
Pharmacyclics, Inc.            common           716933106     2251
28000 SH       SOLE                 28000
Plug Power, Inc.               common           72919P202      228
1051620 SH       SOLE               1051620
Power Solutions International  common           73933G202    11343
435451 SH       SOLE                435451
PowerSecure International, Inc common           73936N105    12968
1020305 SH       SOLE               1020305
Precision Optics Corp          common           740294301      143
350000 SH       SOLE                350000
Precision Optics Corporation   common           740294301      506
919213 SH       SOLE                919213
Pure Technologies, Ltd.        common           745915108     8702
1869300 SH       SOLE               1869300
RXi Pharmaceuticals Corp.      common           74979C105      187
657000 SH       SOLE                657000
Regulus Therapeutics, Inc.     common           75915K101    11007
1420216 SH       SOLE               1420216
Remedent, Inc. (Belgium)       common           75954T104      395
3951933 SH       SOLE               3951933
Repligen Corporation           common           759916109     9798
1417928 SH       SOLE               1417928
Response Genetics, Inc.        common           76123U105     4374
3313513 SH       SOLE               3313513
Riverview Bancorp, Inc.        common           769397100     2548
965150 SH       SOLE                965150
SMART Technologies, Inc.       common           83172R108     4929
3545892 SH       SOLE               3545892
Saia, Inc.                     common           78709Y105      543
15000 SH       SOLE                 15000
Sangamo BioSciences, Inc.      common           800677106    16859
1763503 SH       SOLE               1763503
SeaChange International, Inc.  common           811699107    10958
921581 SH       SOLE                921581
Sequans Communications - ADR   common           817323108     2999
1886239 SH       SOLE               1886239
Silicon Image Inc.             common           82705T102     3753
772300 SH       SOLE                772300
Silicon Motion Technology Corp common           82706C108     7259
620427 SH       SOLE                620427
SoundBite Communications, Inc. common           836091108     1682
546126 SH       SOLE                546126
Spectral Diagnostics Inc.      common           847574100      784
3188009 SH       SOLE               3188009
Summer Infant, Inc.            common           865646103      398
151962 SH       SOLE                151962
Support.com, Inc.              common           86858W101    10102
2416724 SH       SOLE               2416724
Synergetics USA, Inc.          common           87160G107     3314
955027 SH       SOLE                955027
Tetraphase Pharmaceuticals     common           88165N105     6363
900000 SH       SOLE                900000
Titan Machinery, Inc.          common           88830R101    11100
400000 SH       SOLE                400000
Tivo, Inc.                     common           888706108     5521
445600 SH       SOLE                445600
Transgenomic, Inc.             common           89365K206      387
979300 SH       SOLE                979300
U.S. Auto Parts Network, Inc.  common           90343C100     1588
1323032 SH       SOLE               1323032
Ultra Clean Holdings, Inc.     common           90385V107    17162
2640275 SH       SOLE               2640275
Unwired Planet, Inc.           common           91531F103      855
385194 SH       SOLE                385194
Ur-Energy, Inc. (Canada)       common           91688R108     1842
1900000 SH       SOLE               1900000
Verastem, Inc.                 common           92337C104     5715
594026 SH       SOLE                594026
Verdasys, Inc. (Private Compan common           Not Avail     1857
860226 SH       SOLE                860226
Verenium Corporation           common           92340P209     3815
1478676 SH       SOLE               1478676
Waterfurnace Renewable Energy  common           92923V102     2916
182900 SH       SOLE                182900
World Energy Solutions, Inc.   common           98145W208     3686
839652 SH       SOLE                839652
XEBEC Adsorption, Inc.         common           983891102     1902
12083103 SH       SOLE              12083103
iCo Therapeutics, Inc.         common           45107J105     2651
5085000 SH       SOLE               5085000
iPass, Inc.                    common           46261V108     6021
3040809 SH       SOLE               3040809
Verdasys Inc series A-1 cvt pf preferred        Not Avail     4097
1898146 SH       SOLE               1898146
Verdasys Inc series B-1 cvt pf preferred        Not Avail      928
430113 SH       SOLE                430113
NV5 Holding Inc.               Units            62945V208      609
100000 SH       SOLE                100000
ARI Network Services, @2.00 3/ warrants         Not Avail       98
100000 SH       SOLE                100000
Altair Nanotech @.58 5/28/16 * warrants         Not Avail        5
939973 SH       SOLE                939973
Avantair, Inc. @.50 11/30/17 ( warrants         Not Avail      189
3956153 SH       SOLE               3956153
Cerus Corporation @3.20 5/16/1 warrants         Not Avail      598
421052 SH       SOLE                421052
ChinaCast Education Corp (R) @ warrants         Not Avail       15
500000 SH       SOLE                500000
Converted Organics @1.30 12/31 warrants         21245S131        3
1500000 SH       SOLE               1500000
Cyclacel Pharm @1 1/19/10-7/29 warrants         Not Avail       60
670623 SH       SOLE                670623
Cyclacel Phrm @1.92 RR 10/7/15 warrants         Not Avail      144
2053450 SH       SOLE               2053450
Cyclacel Phrm@2.85 7/24/10-1/2 warrants         Not Avail        4
176250 SH       SOLE                176250
CytRx Corporation R/R 8/1/16 @ warrants         232828301      120
2400000 SH       SOLE               2400000
Daegis Inc. Wts (R/R) @2.75 4/ warrants         Not Avail       13
190182 SH       SOLE                190182
Derma Sciences, Inc. (R/R) @9. warrants         Not Avail      176
60606 SH       SOLE                 60606
Dynavax Technologies Corp @1.5 warrants         268158102      356
360000 SH       SOLE                360000
EnteroMedics, Inc (RR) @2.19 6 warrants         Not Avail      585
1500000 SH       SOLE               1500000
EnteroMedics, Inc. (R/R) @1.14 warrants         Not Avail      193
420000 SH       SOLE                420000
EnteroMedics, Inc. (R/R) @1.90 warrants         Not Avail       74
180000 SH       SOLE                180000
EpiCept Corporation Wts @.75 2 warrants         Not Avail       25
1250000 SH       SOLE               1250000
Galena Biopharma R/R @.65 4/21 warrants         Not Avail     1132
750000 SH       SOLE                750000
GeneNews @.24 2/1/15 Reg S (CF warrants         Not Avail      249
4144638 SH       SOLE               4144638
GeneNews @.24 6/1/15 Reg S (CF warrants         Not Avail       48
690278 SH       SOLE                690278
GraphOn Corporation @.26 9/1/1 warrants         Not Avail     1210
2750000 SH       SOLE               2750000
Graymark Hlth @1.40 6/20/16 F4 warrants         Not Avail      678
3571000 SH       SOLE               3571000
Hamilton Thorne @.16875c 5/15/ warrants         Not Avail        2
244444 SH       SOLE                244444
Idera Pharmaceuticals (R/R) @3 warrants         Not Avail       13
216000 SH       SOLE                216000
Inovio Pharm @1.40 7/26/11-1/2 warrants         Not Avail      951
10565200 SH       SOLE              10565200
Integral Vision, Inc. @.001 9/ warrants         Not Avail        9
3600000 SH       SOLE               3600000
Intermap Tech (R/R) @.48CN 4/2 warrants         Not Avail     1397
10750000 SH       SOLE              10750000
LRAD Corporation (R/R) @2.67 2 warrants         Not Avail       71
788090 SH       SOLE                788090
Lightbridge Corp R/R @9.00 1/2 warrants         Not Avail      150
454546 SH       SOLE                454546
Mast Therapeutics @1.10 11/16/ warrants         not avail      206
1875000 SH       SOLE               1875000
Opexa Therapeutic@2.55 6/15/10 warrants         Not Avail       58
262500 SH       SOLE                262500
Overland Storage RR@1.763 2/22 warrants         Not Avail      863
4544701 SH       SOLE               4544701
Palatin RR@1.00 3/2/12-3/2/17  warrants         Not Avail      405
4500000 SH       SOLE               4500000
Palatin(RR) @1.00 3/1/16 *.086 warrants         Not Avail       45
4500000 SH       SOLE               4500000
Parametric Sound R/R @.75 2/22 warrants         Not Avail     2041
602000 SH       SOLE                602000
Parkervision, Inc. (R/R) @.535 warrants         Not Avail     3958
1229104 SH       SOLE               1229104
Plug Power, Inc @1.13 5/31/16  warrants         Not Avail      488
2120000 SH       SOLE               2120000
Power Solutions R/R@.40625 4/2 warrants         Not Avail     4013
9333333 SH       SOLE               9333333
Precision Optic RR@.0472 5/11/ warrants         Not Avail      145
7260000 SH       SOLE               7260000
Precision Optics (Rest) @1.50  warrants         Not Avail       70
350000 SH       SOLE                350000
Precision Optics R/R @1.25 9/2 warrants         Not Avail      116
427779 SH       SOLE                427779
Remark Media @5.937 8/29/17 R/ warrants         Not Avail      112
147222 SH       SOLE                147222
Threshold Pharmaceutical R/R @ warrants         Not Avail      465
190476 SH       SOLE                190476
Transgenomic, Inc.@1.08 2/7/17 warrants         Not Avail      175
1750000 SH       SOLE               1750000
XEBEC Adsorption @.45C 11/1/15 warrants         Not Avail      100
2500000 SH       SOLE               2500000
Ziopharm Oncology Inc (R/R) @2 warrants         Not Avail      181
273973 SH       SOLE                273973
Ziopharm Oncology Inc (R/R) @4 warrants         Not Avail      600
967500 SH       SOLE                967500
Overland Storage, Inc. 20% of  Right            Not Avail     2250
3000000 SH       SOLE               3000000