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Sex Matters vs. transgender people

Sex Matters is an anti-transgender sex segregationist organization based in the United Kingdom.

For media titled Sex Matters, see the note below.


Sex Matters Ltd was founded on October 26, 2020 by Rebecca Bull, Naomi Cunningham, Maya Forstater and Emma Hilton.


Key people include:

  • Rebecca Bull – Founder and Officer (2020–present)
  • Naomi Cunningham – Founder and Officer (2021–present)
  • Maya Forstater – Founder and Officer (2020–present)
  • Emma Hilton – Founder and Officer (2021–present)
  • Michael Biggs – Officer (2021–present)
  • Julia Casimo – Officer (2022–present)
  • Anne Palmer – Officer (2020–2021)
  • Jo Bartosch – Memo Editor
  • Lexi Ellingsworth – Campaign Manager
  • Helen Joyce – Director of Advocacy
  • Beck Laxton – Publications Manager
  • Emma Moore – Administrator
  • Gemma Winborn-Peart – Head of Marketing

Advisory group

  • Keira Bell
  • Lucy Hunter Blackburn
  • Simon Briscoe
  • Sam Bussey
  • Martin Carr
  • Joanna Cherry 
  • Cathy Devine
  • Jess De Wahls
  • Sonya Douglas
  • Tom Farr
  • Milli Hill
  • Nicole Jones
  • Gerard Kelly
  • Monica Kurnatowska
  • Maggie Mellon
  • Gia Milinovich
  • Levi Pay
  • Jo Phoenix
  • Jon Pike
  • Cathy Pitt
  • Joan Smith
  • Alice Sullivan
  • Mara Yamauchi


Several written works have the title Sex Matters, including some by anti-trans authors:

  • Sex Matters: Essays in Gender-Critical Philosophy by Holly Lawford-Smith (2023)
  • Sex Matters: How Modern Feminism Lost Touch with Science, Love, and Common Sense by Mona Charen (2018)
  • Why Sex Matters: A Darwinian Look at Human Behavior by Bobbi S. Low (1999)
  • Sex Matters by Jonathan McKee (2015)

This anthology is by trans-supportive editors:

  • Sex Matters: The Sexuality and Society Reader Edited by Mindy Stombler, Dawn M. Baunach, Elisabeth O. Burgess, Wendy Simonds, Elroi J. Windsor (2003–present)

These titles are unrelated to trans issues:

  • Sex Matters: How Male-Centric Medicine Endangers Women’s Health and What We Can Do About It by Alyson J. McGregor (2020)
  • Sex Matters: From Sex to Superconsciousness by Osho (2003)


Trans Data Library (

  • Sex Matters

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