By Lisa Richwine and Dawn Chmielewski LOS ANGELES (Reuters) -Walt Disney missed Wall Street estimates for quarterly revenue on Thursday as ongoing weakness in its cable TV unit overshadowed solid growth in streaming and theme parks, sending its shares down more than 3.9% in premarket trading. The media and entertainment giant also unveiled plans to boost its dividend by 50% and double its share buyback plan for fiscal 2026. It posted adjusted earnings per share of $1.11 for its fourth quarter ending in September, a 3% decline from a year earlier but 6 cents above an average LSEG estimate. Profit rose in Disney's theme parks unit, partially from an expansion of the U.S. cruise ship business and growth at Disneyland Paris. Earnings at its streaming business surged 39% to $352 million. Disney

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