So exactly how many Quillette articles are republished by white supremacist American Renaissance?

American Renaissance is, per the SPLC:

Founded by Jared Taylor in 1990, the New Century Foundation is a self-styled think tank that promotes pseudo-scientific studies and research that purport to show the inferiority of blacks to whites — although in hifalutin language that avoids open racial slurs and attempts to portray itself as serious scholarship. It is best known for its American Renaissance magazine and website, which regularly feature proponents of eugenics and blatant anti-black racists. The foundation also sponsors American Renaissance conferences every other year where racist "intellectuals" rub shoulders with Klansmen, neo-Nazis and other white supremacists.

UPDATE: as of July 2021 the number is 25

TOTAL: 7
All except one since 2018

On the Reality of Race and the Abhorrence of Racism
Bo Winegard, Ben Winegard, and Brian Boutwell, Quillette, June 23, 2016

Black American Culture and the Racial Wealth Gap
Coleman Hughes, Quillette, July 19, 2018

The Dangers of Ignoring Cognitive Inequality
Wael Taji, Quillette, August 28, 2018

The Racism Treadmill
Coleman Hughes, Quillette, May 14, 2018

Is There Room in Diversity for White People?
Steve Salerno, Quillette, May 10, 2018

She Has Her Mother’s Laugh: The Powers, Perversions, and Potential of Heredity—A Review
Gregory Cochran, Quillette, July 1, 2018

Public Education’s Dirty Secret
Mary Hudson, Quillette, February 10, 2019

BONUS - an article by Jerry Coyne has also been reprinted in American Renaissance.

If ISIS Is Not Islamic, Then the Inquisition Was Not Catholic
Jerry A. Coyne, New Republic, September 13, 2014