Shamrock Holdings reduced its stake in Disney.

The company, owned by the Roy E. Disney family, said it has completed the open-market sale of about 1.8 million shares of Walt Disney Co. by Burbank-based Shamrock and certain family members but said the family will continue to hold 4 million Disney shares, or 3% of the total outstanding. Roy Disney is vice chairman of Walt Disney Co., which was co-founded by his father and uncle. A Shamrock spokesman said the shares were sold for other family business interests and tax planning purposes.