Source: Whale Wisdom
By Philip Elmer-DeWitt
February 20, 2015

Apple was once again the hedge funds’ favorite stock last quarter, both in terms of the number of firms holding the stock and the value of their holdings, according to Whale Wisdom’s Daniel Collins.

Whale Wisdom tracks securities based on the Form 13Fs that funds with more than $100 million under management are required to file 45 days after the end of each quarter. Overall, according to Collins’ summary,

212 funds created new Apple positions
799 added to an existing Apple position
67 closed their Apple position
1,004 reduced their Apple position

Drilling down a bit, here are last quarter’s 12 biggest buyers and 12 biggest sellers.

Drilling down even further, here are the 12 biggest sellers and buyers of puts and calls.

Click to enlarge.

When you get into high-volume option trading, things get pretty complicated, with some funds making large bullish and bearish trades in the same quarter. I suspect the machines know what they are doing, even if the fund managers don’t.

Thanks once again to Whale Wisdom for access to their data.

Follow Philip Elmer-DeWitt on Twitter at @philiped. Read his Apple AAPL coverage at fortune.com/ped or subscribe via his RSS feed.

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