A large WSJ advert from Philip Morris International touts the standard "women = growth" myths:

https://partners.wsj.com/pmi/itstime/inclusion-and-diversity-strategies-arent-about-ticking-boxes-heres-why/

A 2019 report by the global consulting firm, Korn Ferry, shows that companies which increased their female representation in corporate leadership roles by up to a third also grew their profitability by as much as fifteen percent.

But the reference is not a study, but a white paper making claims without support:

https://infokf.kornferry.com/rs/494-VUC-482/images/KF_Gender_Pay_Fixing-gender-pay-divide_whitepaper_web.pdf

Championing women’s equality at work leads to...
Better corporate performance and stability.
Companies in the top quartile for gender diversity are 15% more likely to have financial returns above the median for their respective national industry.
Going from 0% to 30% women in corporate leadership is associated with a 15% increase in profitability. And companies with more diverse boards perform better during economic stress while female bosses make banks more stable.

(Ironically, the paper makes these claims in proximity to its own charts showing gender a negligible contributor to pay gap, once all other factors controlled.)

The Philip Morris advert continues:

And last year’s Global Leadership Forecast by DDI, a global leadership consultancy firm, highlighted that companies with at least 30 percent gender diversity overall—and more than 20 percent at senior level—outperformed their less-diverse peers in key leadership and business outcomes.

Then the advert makes yet another claim, pointing to a Mercer white paper which itself makes claims without support:

https://www.brinknews.com/delivering-diversity-balancing-for-better-in-asia/

What does this tell us? Simply put: The link between gender diversity and better results today is undeniable. Yet the speed with which organizations are embracing this trend shaping leadership is far from uniform. For instance, in parts of Asia, some people view inclusion and diversity (I&D) efforts as a Western concept. Yet research conducted in the region by consultancy firm, Mercer, found that employees who are thriving at work are seven times more likely to work for a company committed to gender pay equity and equal opportunities.

Mercer then joins the diversity-and-inclusion industry:
https://www.mercer.com/our-thinking/when-women-thrive.html

Of course, Googling "gender company growth" produces millions of entries claiming more women = more profits. Yet even highly-reputed sources seem to mistake correlation for causality, as I argued here:

https://www.reddit.com/r/MensRights/comments/4seniz/potential_refutation_of_women_company_growth/

Even the OECD gets into the act (from the above Google scan):
https://www.norden.org/en/news/new-oecd-report-nordic-gender-equality-boosts-gdp-growth
http://www.oecd.org/els/emp/last-mile-longest-gender-nordic-countries-brief.pdf

I need to do further research but wonder whether any of these "studies" asks a pertinent question from basic economic supply-and-demand: Does increasing the labour pool (by adding women) drive down wages?