Simons styrede Renaissance indtil han gik på pension i slutningen af 2009.<ref name="nytimes.com">{{Cite news |last=PÉREZ-PEÑA |first=RICHARD |date=13. december 2011 |title=Stony Brook University to Get $150 Million Gift |agency=New York Times |url=https://www.nytimes.com/2011/12/14/nyregion/stony-brook-university-given-150-million.html |access-date=28. februar 2017 |archive-date=9. september 2017 |archive-url=https://web.archive.org/web/20170909174341/http://www.nytimes.com/2011/12/14/nyregion/stony-brook-university-given-150-million.html |url-status=live }}</ref> Simons stoppede som formand i 2021.<ref>{{Cite news|last=Zuckerman|first=Gregory|date=2021-01-14|title=WSJ News Exclusive {{!}} James Simons Steps Down as Chairman of Renaissance Technologies|language=en-US|work=Wall Street Journal|url=https://www.wsj.com/articles/james-simons-steps-down-as-chairman-ofrenaissance-technologies-11610637320|access-date=2021-01-14|issn=0099-9660}}</ref> Firmaet bliver nu drevet af Peter Brown (efter [[Robert Mercer (erhvervsmand)|Robert Mercer]] stoppede). Begge var [[datalog]]er med speciale i [[datalingvistik]], som startede i Renaissance i 1993 fra [[IBM Research]].<ref name="wsj-160310" /><ref name="reuters-151015">{{Cite news |last=Herbst-Bayliss |first=Svea |date=15. oktober 2015 |title=Renaissance Technologies to shut small hedge fund: sources |work=Reuters |url=https://www.reuters.com/article/us-hedgefunds-renaissance-idUSKCN0S72SG20151013 |access-date=31. oktober 2015 |archive-date=25. oktober 2015 |archive-url=https://web.archive.org/web/20151025221000/http://www.reuters.com/article/2015/10/13/us-hedgefunds-renaissance-idUSKCN0S72SG20151013 |url-status=live }}</ref><ref>{{Cite web |last=Blake |first=Mariah |title=Why Are These Hedge Fund Kingpins Dumping Millions Into the Midterms? |url=https://www.motherjones.com/politics/2014/10/hedge-fund-taxes-superpacs-election-renaissance |access-date=14. oktober 2014 |website=Mother Jones |archive-date=15. oktober 2014 |archive-url=https://web.archive.org/web/20141015004129/http://www.motherjones.com/politics/2014/10/hedge-fund-taxes-superpacs-election-renaissance |url-status=live }}</ref> Simons fortsatte med at spille en rolle i firmaet som ikke udøvende formand, og er fortsat investeret i fondene, særligt den hemmelghedsfulde og konsistent profiitable [[Algoritmehandel|black-box]]-strategi kendt som Medallion.<ref>{{Cite web |title=Forbes 400 |url=https://www.forbes.com/profile/james-simons/ |access-date=1. november 2015 |website=Forbes.com |archive-date=31. august 2019 |archive-url=https://web.archive.org/web/20190831224516/https://www.forbes.com/profile/james-simons/ |url-status=live }}</ref> Fonden havde $165 mia. i estimeret aktiver i april 2021.<ref>{{Cite web|title=The Medallion Fund Is Still Outperforming. Other Renaissance Funds Still Aren’t.|url=https://www.institutionalinvestor.com/article/b1rgwjlwfqccst/The-Medallion-Fund-Is-Still-Outperforming-Other-Renaissance-Funds-Still-Aren-t|access-date=2021-04-19|website=Institutional Investor|language=en-gb}}</ref>
Historie Foreninger Organisationer