Report Description

This report, much like our original certs and CAs report, focuses on issuers of SSL enabling certificates found on web servers. Unlike our original report, however, this report has a couple of key differences to it:

• Reports on top 100 CAs. The original report only paid attention to the major CAs at the time the report was produced. This report lists the top 100 CAs for the month. You will find here many self-signing organizations such as universities, telecommunications firms, etc.
• Uses issuer name as identifier. Our original report only counted a certificate towards an organization if we were able to prove, by virtue of verifying the key, that the organization in question actually signed the certificate. This had a notable problem with it - we don't always have the public key of the CA. In at least one case, a CA doesn't make their public key available unless you sign a license agreement.

  This report doesn't have that problem, since it only uses the issuer Organization Name to uniquely identify the issuing CA.

CA	May 2016 Count	May 2016 %	April 2016 Count	April 2016 %	Growth %
GoDaddy.com, Inc.	565,387	21.05	557,643	21.32	-1.26
COMODO CA Limited	435,572	16.22	425,543	16.27	-0.31
GeoTrust Inc.	372,056	13.85	365,891	13.99	-0.97
DigiCert	297,561	11.08	288,952	11.05	0.29
GlobalSign nv-sa	182,920	6.81	173,158	6.62	2.88
Symantec Corporation	119,512	4.45	97,896	3.74	18.89
Gandi	82,628	3.08	81,755	3.13	-1.57
thawte, Inc.	68,140	2.54	66,857	2.56	-0.74
Starfield Technologies, Inc.	38,742	1.44	34,069	1.30	10.75
Unizeto Technologies S.A.	31,461	1.17	31,169	1.19	-1.70
GeoTrust, Inc.	31,437	1.17	34,997	1.34	-12.52
StartCom Ltd.	31,366	1.17	31,157	1.19	-1.96
Microsoft Corporation	30,558	1.14	30,176	1.15	-1.38
Unknown	28,512	1.06	31,707	1.21	-12.42
Internet2	27,072	1.01	26,524	1.01	-0.60
Entrust, Inc.	24,726	0.92	24,514	0.94	-1.77
Verizon Enterprise Solutions	23,789	0.89	25,070	0.96	-7.59
TERENA	22,864	0.85	22,810	0.87	-2.38
Network Solutions L.L.C.	22,239	0.83	23,316	0.89	-7.11
Let's Encrypt	19,449	0.72	15,010	0.57	26.19
Parallels	17,053	0.63	16,845	0.64	-1.41
Verisign	13,125	0.49	14,475	0.55	-11.69
Trustwave Holdings, Inc.	12,747	0.47	12,680	0.48	-2.10
SomeOrganization	11,222	0.42	11,025	0.42	-0.87
Thawte, Inc.	10,791	0.40	11,782	0.45	-10.80
Google Inc	10,280	0.38	10,041	0.38	-0.29
QuoVadis Limited	7,234	0.27	6,889	0.26	2.27
Cybertrust Japan Co., Ltd.	5,503	0.20	5,411	0.21	-0.95
none	5,162	0.19	4,938	0.19	1.81
AlphaSSL	5,067	0.19	5,786	0.22	-14.71
WoSign CA Limited	4,956	0.18	4,681	0.18	3.11
Comodo Limited	3,999	0.15	4,022	0.15	-3.17
cPanel, Inc.	3,891	0.14	0	0.00	N/A
SECOM Trust Systems CO.,LTD.	3,645	0.14	3,652	0.14	-2.80
ispgateway	3,031	0.11	2,982	0.11	-1.01
DreamHost	2,932	0.11	2,689	0.10	6.19
Corporation Service Company	2,718	0.10	3,627	0.14	-27.02
SecureCore	2,564	0.10	2,433	0.09	2.63
Volusion, Inc.	2,446	0.09	2,636	0.10	-9.63
Equifax (Geotrust)	2,212	0.08	2,313	0.09	-6.86
KDDI Web Communications Inc.	2,158	0.08	1,981	0.08	6.09
GANDI SAS	1,978	0.07	2,130	0.08	-9.56
Amazon	1,872	0.07	1,493	0.06	22.11
Government of Korea	1,863	0.07	1,885	0.07	-3.75
National Institute of Informatics	1,814	0.07	1,792	0.07	-1.41
Odin	1,808	0.07	1,507	0.06	16.84
nazwa.pl sp. z o.o.	1,765	0.07	1,612	0.06	6.63
Intermediate Certificate	1,750	0.07	1,764	0.07	-3.38
T-Systems International GmbH	1,724	0.06	1,724	0.07	-2.61
SSL.com	1,285	0.05	1,213	0.05	3.17
U.S. Government	1,240	0.05	1,272	0.05	-5.06
Trend Micro Inc	1,173	0.04	873	0.03	30.86
EUNETIC GmbH	1,142	0.04	1,128	0.04	-1.40
DOMENY.PL sp. z o.o	1,000	0.04	933	0.04	4.38
Root CA	992	0.04	1,039	0.04	-7.02
Comodo CA Limited	985	0.04	1,057	0.04	-9.24
CAcert Inc.	979	0.04	1,010	0.04	-5.60
TAIWAN-CA	975	0.04	923	0.04	2.88
Internet Widgits Pty Ltd	961	0.04	963	0.04	-2.81
SwissSign AG	892	0.03	880	0.03	-1.28
NetLock Kft.	849	0.03	842	0.03	-1.80
Hostpoint GmbH	834	0.03	619	0.02	31.22
KEYNECTIS	805	0.03	765	0.03	2.48
Thawte	779	0.03	814	0.03	-6.80
Globe Hosting, Inc.	730	0.03	747	0.03	-4.83
Rede Nacional de Ensino e Pesquisa - RNP	729	0.03	701	0.03	1.28
KPN Corporate Market BV	648	0.02	657	0.03	-3.94
Zimbra Collaboration Server	637	0.02	628	0.02	-1.21
ICP-Brasil	630	0.02	632	0.02	-2.92
FNMT-RCM	610	0.02	605	0.02	-1.81
Parallels, Inc.	566	0.02	594	0.02	-7.20
TBS INTERNET	561	0.02	547	0.02	-0.12
nazwa.pl S.A.	499	0.02	542	0.02	-10.34
ACCV	489	0.02	483	0.02	-1.40
WebSupport, s.r.o.	467	0.02	442	0.02	2.90
SWsoft, Inc.	452	0.02	445	0.02	-1.08
Dreamcommerce S.A.	447	0.02	416	0.02	4.65
TAIWAN-CA INC.	423	0.02	450	0.02	-8.45
Snake Oil, Ltd	417	0.02	403	0.02	0.77
Trust Provider B.V.	415	0.02	301	0.01	34.28
Firstserver, Inc	409	0.02	418	0.02	-4.71
XX	366	0.01	365	0.01	-2.34
CrossTrust	359	0.01	358	0.01	-2.34
Buypass AS-983163327	344	0.01	310	0.01	8.07
Universitaet Stuttgart	311	0.01	309	0.01	-1.98
Register.com	311	0.01	341	0.01	-11.18
Default Company Ltd	303	0.01	276	0.01	6.92
HTTPS Management Certificate for SonicWALL (self-signed)	297	0.01	314	0.01	-7.88
Yandex LLC	292	0.01	297	0.01	-4.25
Apache HTTP Server	285	0.01	269	0.01	3.18
Site Blindado S.A.	279	0.01	262	0.01	3.71
Servision Inc.	269	0.01	424	0.02	-38.21
OCC	259	0.01	265	0.01	-4.81
Pavel&Pavel	258	0.01	258	0.01	-2.61
Agencia Catalana de Certificacio (NIF Q-0801176-I)	253	0.01	263	0.01	-6.31
DOMENY.PL Ltd.	252	0.01	265	0.01	-7.39
Dell Inc.	250	0.01	248	0.01	-1.82
Actalis S.p.A./03358520967	250	0.01	245	0.01	-0.62
Oracle Corporation	248	0.01	247	0.01	-2.22
QuoVadis Trustlink BV	247	0.01	0	0.00	N/A

Note: Readers are cautioned that the Growth percentages are based on a CA's market share penetration rather than the absolute number of certificates we detected. Thus, it is possible for the number of certificates to increase, while the growth is actually a negative value.