I was curious too and have started gathering the info. Here is the data for the first 30 of the 257 (in alphabetic order):
22nd Century Group, Inc. 42.01
Abeona Therapeutics, Inc. 161.54
Accurexa Inc. 9.41
AcelRx Pharmaceuticals, Inc. 196.58
Acme United Corporation 61.06
Actinium Pharmaceuticals, Inc. 91.02
ADMA Biologics, Inc. 103.42
Aemetis, Inc. 65.23
Aeterna Zentaris Inc. 13.84
Aethlon Medical, Inc. 52.13
Agenus Inc. 640.74
Agile Therapeutics, Inc. 196.66
Alliqua BioMedical, Inc. 128.94
Amarin Corporation plc 414.17
American DG Energy Inc. 20.26
AmpliPhi Biosciences Corporation 52.63
Amyris, Inc. 258.32
Aoxing Pharmaceutical Company, Inc. 108.57
Apricus Biosciences, Inc. 58.48
ARCA biopharma, Inc. 56.91
Arch Therapeutics, Inc. 28.68
Arno Therapeutics, Inc. 7.76
Ascent Solar Technologies, Inc. 4.59
Asterias Biotherapeutics, Inc. 152.66
Atossa Genetics Inc. 27.3
Aurinia Pharmaceuticals Inc. 113.25
Avino Silver & Gold Mines Ltd. 39.18
Avita Medical Limited 19.84
Bellerophon Therapeutics LLC 78.46
Bio Blast Pharma Ltd. 81.82
That's 18 on NASDAQ, 8 on NYSE, and 4 on the OTC.