<SEC-DOCUMENT>0001172661-21-000635-index.html : 20210216
<SEC-HEADER>0001172661-21-000635.hdr.sgml : 20210216
<ACCEPTANCE-DATETIME>20210216132936
ACCESSION NUMBER:		0001172661-21-000635
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20210216
DATE AS OF CHANGE:		20210216

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MEDNAX, INC.
		CENTRAL INDEX KEY:			0000893949
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-HOSPITALS [8060]
		IRS NUMBER:				263667538
		STATE OF INCORPORATION:			FL
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-46595
		FILM NUMBER:		21635613

	BUSINESS ADDRESS:	
		STREET 1:		1301 CONCORD TERRACE
		CITY:			SUNRISE
		STATE:			FL
		ZIP:			33323
		BUSINESS PHONE:		9543840175

	MAIL ADDRESS:	
		STREET 1:		1301 CONCORD TERRACE
		CITY:			SUNRISE
		STATE:			FL
		ZIP:			33323

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PEDIATRIX MEDICAL GROUP INC
		DATE OF NAME CHANGE:	19950801

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ArrowMark Colorado Holdings LLC
		CENTRAL INDEX KEY:			0001483859
		IRS NUMBER:				392068140
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		100 FILLMORE STREET, SUITE 325
		CITY:			DENVER
		STATE:			CO
		ZIP:			80206
		BUSINESS PHONE:		303.398.2929

	MAIL ADDRESS:	
		STREET 1:		100 FILLMORE STREET, SUITE 325
		CITY:			DENVER
		STATE:			CO
		ZIP:			80206

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Arrowpoint Asset Management, LLC
		DATE OF NAME CHANGE:	20100211
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>arrowmark-md123120a1.htm
<DESCRIPTION>SCHEDULE 13G HOLDINGS REPORT AMENDMENT
<TEXT>
Document 1 - file: arrowmark-md123120a1.htm

</DOCUMENT>
</SEC-DOCUMENT>