<SEC-DOCUMENT>0001037389-24-000016-index.html : 20240213
<SEC-HEADER>0001037389-24-000016.hdr.sgml : 20240213
<ACCEPTANCE-DATETIME>20240213094307
ACCESSION NUMBER:		0001037389-24-000016
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20240213
DATE AS OF CHANGE:		20240213

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PSYCHEMEDICS CORP
		CENTRAL INDEX KEY:			0000806517
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-MEDICAL LABORATORIES [8071]
		ORGANIZATION NAME:           	08 Industrial Applications and Services
		IRS NUMBER:				581701987
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-39145
		FILM NUMBER:		24623005

	BUSINESS ADDRESS:	
		STREET 1:		125 NAGOG PARK
		CITY:			ACTON
		STATE:			MA
		ZIP:			01720
		BUSINESS PHONE:		978-206-8220

	MAIL ADDRESS:	
		STREET 1:		125 NAGOG PARK
		CITY:			ACTON
		STATE:			MA
		ZIP:			01720

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			RENAISSANCE TECHNOLOGIES LLC
		CENTRAL INDEX KEY:			0001037389
		ORGANIZATION NAME:           	
		IRS NUMBER:				260385758
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		800 THIRD AVE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022
		BUSINESS PHONE:		2124866780

	MAIL ADDRESS:	
		STREET 1:		800 THIRD AVE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	RENAISSANCE TECHNOLOGIES CORP
		DATE OF NAME CHANGE:	19990324
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>pmd-13g_20231231.txt
<TEXT>
Document 1 - file: pmd-13g_20231231.txt

</DOCUMENT>
</SEC-DOCUMENT>