Every quarter, many money managers have to disclose what they've bought and sold, via "13-F" filings. Their latest moves can shine a bright light on smart stock picks.

Today let's look at Lone Pine Capital, founded by Steve Mandel  in 1997.Before that, Mandel was a managing director at Tiger Management. Lone Pine is one of the biggest hedge fund companies, and reportedly beat the S&P 500 for 11 years in a row. Like many value investors, Mandel is known to dig deep into companies, aiming to buy undervalued ones.

The company's reportable stock portfolio totaled $16.5 billion  in value as of Sept. 30, 2012.

Interesting developments
So what does Lone Pine Capital's latest quarterly 13-F filing tell us? Here are a few interesting details:

The biggest new holdings are Schlumberger (NYSE:SLB) and VeriSign (NASDAQ:VRSN). VeriSign, an Internet infrastructure services company, recently got good and bad news. Per a Department of Commerce decision, it will be able to continue registering ".com" websites, but it won't get automatic (up to) 7% annual rate increases. Still, it's a leader in its field and collects a lot of recurring revenue.

Among holdings in which Lone Pine Capital increased its stake were priceline.com (NASDAQ:BKNG) and Cognizant Technology Solutions (NASDAQ:CTSH). Priceline has been experiencing strong growth internationally, with growth in Asia and the U.S. making up for weakness in Europe. The stock has been a huge winner for Motley Fool Stock Advisor investors. Some think it has risen too quickly lately, while others, such as a variety of Wall Street analysts as well as our own, think it has plenty of room to run, liking its fat profit margins and rapid growth rates..

IT consulting and outsourcing specialist Cognizant Technology Solutions' (NASDAQ:CTSH) growth has slowed a bit in recent years, but it's still growing at a solid clip, with revenue up 18% over year-ago levels in its last quarter. In addition, management was pleased  with strong growth from relatively new services, such as consulting, business process outsourcing, and IT infrastructure services. Its currently weak areas, such as Europe and the health-care market, are likely to recover eventually, boosting profits.

Lone Pine Capital reduced its stake in lots of companies, including Qualcomm (NASDAQ:QCOM). Qualcomm is supplying many millions of iDevices and Android devices with its LTE  chip technology. It ran into trouble earlier in the year, though, when supply shortages at Taiwan Semiconductor (NYSE:TSM) slowed its production. Qualcomm has been broadening its line of S4 Snapdragon processors for smartphones, and it has surpassed chip giant Intel (NASDAQ:INTC) in market capitalization.

Finally, Lone Pine Capital's biggest closed positions included Teradata (NYSE:TDC) and Ross Stores (NASDAQ:ROST). Other closed positions of interest include Netflix (NASDAQ:NFLX), which was a new holding for the company just last quarter. Netflix has been struggling, dealing with serious competition from Amazon.com (NASDAQ:AMZN) and Coinstar's (NASDAQ:OUTR) Redbox service, which is teaming up with Verizon (NYSE:VZ) to offer video streaming. Still, Netflix continues to grow, and is expanding abroad. Some even speculate that it might get bought out.

We should never blindly copy any investor's moves, no matter how talented the investor. But it can be useful to keep an eye on what smart folks are doing, and 13-F forms can be great places to find intriguing candidates for our portfolios.

Longtime Fool contributor Selena Maranjian, whom you can follow on Twitter,owns shares of Amazon.com, Intel, Netflix, Priceline.com, Qualcomm, Teradata, and Verizon Communications. The Motley Fool owns shares of Amazon.com, Intel, Netflix, priceline.com, and Qualcomm. Motley Fool newsletter services recommend Amazon.com, Intel, Netflix, priceline.com, and Teradata. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.