According to the SEC, institutional investment managers who exercise investment discretion over $100 million or more must report their holdings on Form 13F with the SEC.

So, who should be watching as Wall Street whales begin to disclose their positions in their 13-F filings?

Whitney Tilson, Managing Partner of T2 Capital Partners joins the panel for this conversation. Following is a summary of his main points.

Activist investor Bill Ackman acknowledged taking a stake in Target via his 13-F last quarter, explains Tilson. I’m curious to see what he says this year.

What do you think of Target?

Although it might take a while, once the American consumer picks up Target could be worth twice as much, he says.

Or you might want to follow Eddie Lampert, adds Karen Finerman. Specifically, see if he bought a larger stake in Home Depot or Citibank. Also, I like to see what Carl Icahn is buying as well as Jeff Gendel, of Tontine Partners.

Read more:

> Form 13F—Reports Filed by Institutional Investment Managers

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Trader disclosure: On Feb.12, 2008, the following stocks and commodities mentioned or intended to be mentioned on CNBC’s Fast Money were owned by the Fast Money traders; Macke Owns (INTC), (YHOO), (DIS); Najarian Owns (BIIB), (C), (CSCO), (MCD), (MS), (MSFT), (YHOO), (XLF); Najarian Owns (AAPL) Calls; Najarian Owns (FRE) Puts; Finerman Owns (GS); Finerman's Firm Owns (AAPL), (GE), (MSFT), (WMT), (YHOO); Finerman's Firm And Finerman Own (HD); Finerman's Firm Is Short (SPY), (IJR), (IYR), (MDY), (IWM); Finerman's Firm Is Short (LEH) And Owns (LEH) Puts