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Peter Lynch: "Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"

Why GuruFocus thinks insider data interesting, read Stocks that Both Gurus and Insiders are Buying

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3m Company (MMM) VICE PRESIDENT MARKETING MacDonald Robert D III's Insider Stock Buys and Sells
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MMM is Owned by These Gurus:
Ticker Guru Name Portfolio Date* Current Shares (?) % of Total Assets (?) Change from Last Holdings (?)
MMMOak Value 2009-12-3180,1333.51%-2.82%
MMMBrian Rogers 2009-12-313,698,7001.8%0%
MMMTom Russo 2009-12-3110,3000.04%0%
MMMManning & Napier Advisors, Inc 2009-12-3100%Sold Out
MMMJohn Hussman 2009-12-3100%Sold Out
MMMBill Frels 2009-09-302,301,0795.57%-1.44%
MMMArnold Van Den Berg 2009-09-30626,9593.11%-35.38%
MMMTweedy Browne 2009-09-30689,6962.75%-3.23%
MMMRobert Olstein 2009-09-30103,1001.42%-33.1%
MMMBill Nygren 2009-09-30550,0001.35%0%
MMMJeremy Grantham 2009-09-304,361,5481.22%-9.9%
MMMTom Gayner 2009-09-3086,4000.48%6.14%
MMMMark Hillman 2009-09-3021,6050.37%3.58%
MMMKenneth Fisher 2009-09-30244,8820.06%-6.26%
MMMRichard Aster Jr 2009-09-305,5000.02%1.85%
MMMDavid Dreman 2009-09-3000%Sold Out
MMMJean-Marie Eveillard 2009-09-3000%Sold Out
MMMJohn Buckingham 2009-09-3000%Sold Out
MMMChris Davis 2009-09-3000%Sold Out
MMMDodge & Cox 2009-09-3041,5120%0%
MMMPRIMECAP Management 2009-09-3013,0000%0%
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Only the transactions in Open Market or Private Sale at the market prices are included. Other transactions such as Conversion of derivative security or Exercise of Options are not included. Insiders are only limited to Officers and/or Directors of the company.


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