Women have made modest advances in the boardroom over the past few years, now holding roughly 10% of directors' seats worldwide, according to a new report. A survey of over 4,300 companies in 45 countries by research firm GMI Ratings found incremental gains globally over the past few years. Women held 10.8% of board seats in the companies surveyed as of the fourth quarter of last year, the highest share ever. That's up from 9.8% in late 2010 and 9.3% a year prior. More than 60% of companies surveyed had at least one female director, up from 58% in last year's survey, though just 2% had a female chair. Some 9.8% had at least three female directors.