In recent weeks, several boards have grown in size to bring on new directors.

According to SEC filings analyzer MyLogIQ, boards of such companies as Ball Corporation, Micron Technology and Oracle amended bylaws dictating board size in order to appoint new directors, while Cintas, Ford Motor Co. and General Mills expanded without needing formal votes on bylaws.

All the new directors appointed to the preceding boards are women, and in the case of Ball Corp., the appointment of Betty Sapp — former director of a joint Department of Defense-Intelligence Community organization — brings the percentage of women on the board to 40%. General Mills’ June 24 appointment of former McKinsey & Company leader Elizabeth Lempres brings the percentage to 46%.