Update: Fortune 500 Women CEOs hits a record 20

FORTUNE -- As we noted yesterday, Yahoo's new chief Marissa Mayer is the youngest CEO in the Fortune 500. Mayer's appointment means that the Fortune 500 now has 20 female CEOs, a new record. Here's the list:

10. Meg Whitman - Hewlett-Packard (HPQ)

19. Ginni Rometty - IBM (IBM)

28. Patricia Woertz - Archer Daniels Midland (ADM)

41. Indra Nooyi - PepsiCo (PEP)

45. Angela Braly - WellPoint (WLP)

50. Irene Rosenfeld - Kraft Foods (KFT)

72. Ellen Kullman - DuPont (DD)

125. Carol Meyrowitz - TJX (TJX)

127. Ursula Burns - Xerox (XRX)

234. Sheri McCoy - Avon Products (AVP)

250. Deanna Mulligan - Guardian Life Ins. Of America

266. Debra Reed - Sempra Energy (SRE)

334. Denise Morrison - Campbell Soup (CPB)

390. Ilene Gordon - Ingredion (INGR)

396. Heather Bresch - Mylan (MYL)

451. Kathleen Mazzarella - Graybar Electric

464. Maggie Wilderotter - Frontier Communications (FTR)

465. Gracia Martore - Gannett (GCI)

483. Marissa Mayer - Yahoo (YHOO)

499. Beth Mooney - Key Corp (KEY)

Put the names to the faces by clicking here.

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An earlier version of this article stated that there are 19 women Fortune 500 CEOs.