# In 1991 it was said to have been 'acquired' from Arnold & Porters by the umbrella media firm [[Grey Communications International]] (GCI), which made it a subsidiary of Grey Advertising, New York's largest advertising and public relations firm with about $7 billion in revenues. This later became Grey Global.
# In July 1994 APCO were still using Arnold & Porter's fax number See list head EuroTASSC Prospective participants list.
<table width="3025%" bgcolor="eeeedd" border=1 rules=all cellpadding=5 align=right><tr bgcolor="cccccc"><th>THIS IS A SPLIT ENTRYASSOCIATED ENTRIES</th></tr>
<tr><td>[[APCO Worldwide]] </td></tr>
<tr><td>[[APCO (Doc Index)]] </td></tr>
<tr><td>[[Margery Kraus]]</td></tr>
<tr><td>[[Grey Communications International|Grey Communications]]</td></tr>
<tr><td>[[WPP Group]] & nbsp; & [[Martin Sorrell]]</td></tr><tr><td>[[TASSC]] & nbsp; & [[Stephen J Milloy]]</td></tr><tr><td>[[SEPP]] & [[S. Fred Singer]]</td><tr></table>
</table>[http://legacy.library.ucsf.edu/tid/ieg22d00/pdf] and EuroScience Project (Brussels) [http://legacy.library.ucsf.edu/tid/qqn47c00/pdf]
# In September 2004 APCO was supposedly absorbed by [[Martin Sorrell]] into his WPP Group (multi-media global giant) when they swallowed up the Grey Global empire. The WPP Group had [[Hamish Maxwell]] (retired Chairman of Philip Morris) as Non-executive Chairman from 1996 to 2001.