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This site was the winning entry in Yahoo's web programming competition in 2009. It is a near real-time parser of the SEC's EDGAR database. You can search for a company to see insider transactions and sign up for email alerts. Email alerts are sent out within ~15 seconds of the information becoming public, making this far more current than Google Finance or Yahoo Finance.

Top 25 Largest $ Insider Transactions

This table shows the top 25 companies with the greatest dollar value of insider transactions since mid-October of 2009. Companies with a ratio of standard deviation to average for price per share of greater than 0.3 were excluded.

Company (Symbol) Magnitude of Transactions Value Shares Transactions Avg. Share Price and Sample Std.Dev. Price per Share Range View Transactions
DOLLAR GENERAL CORP (DG) $24,769,131,732 618,707,990 259 $42.54 σ = 9.42 21.00 - 58.39 View Transactions
HCA INC/TN (NONE) $24,335,802,313 668,850,571 226 $35.71 σ = 10.2 19.35 - 104.22 View Transactions
FRONTIER FUND (NONE) $20,012,012,161 167,098,860 37 $118.22 σ = 24.64 81.23 - 172.54 View Transactions
MANAGED FUTURES INDEX SERIES, a series of The Frontier Fund (NONE) $20,007,228,121 167,060,496 2 $121.7 σ = 1.94 119.76 - 123.64 View Transactions
KINDER MORGAN, INC. (KMI) $16,434,899,663 485,660,758 87 $31.19 σ = 3.58 25.35 - 37.80 View Transactions
Nielsen Holdings N.V. (NLSN) $16,123,880,890 472,064,039 184 $35.28 σ = 5.89 26.89 - 47.69 View Transactions
Sensata Technologies Holding N.V. (ST) $15,942,330,259 483,695,066 79 $30.98 σ = 7.65 16.92 - 47.37 View Transactions
Activision Blizzard, Inc. (ATVI) $11,573,345,126 833,486,741 41 $15.14 σ = 3.73 8.47 - 23.10 View Transactions
MICROSOFT CORP (MSFT) $11,225,741,830 384,657,904 176 $29.98 σ = 5.32 23.79 - 46.15 View Transactions
Google Inc. (GOOG) $10,166,392,269 14,663,108 8865 $689.94 σ = 183.92 25.00 - 1226.39 View Transactions
ANTERO RESOURCES Corp (AR) $9,844,441,947 164,284,738 25 $56.56 σ = 8.73 42.02 - 62.00 View Transactions
BlackRock Inc. (BLK) $6,973,175,455 46,932,303 397 $184.81 σ = 30.73 0.00 - 320.06 View Transactions
MRC GLOBAL INC. (MRC) $6,531,092,892 275,718,336 28 $24.34 σ = 4.31 19.74 - 32.58 View Transactions
GENERAC HOLDINGS INC. (GNRC) $6,175,564,947 173,471,863 126 $33.47 σ = 7.15 15.88 - 53.65 View Transactions
TRW AUTOMOTIVE HOLDINGS CORP (TRW) $5,475,612,123 129,100,913 78 $48.92 σ = 14.1 26.30 - 82.01 View Transactions
Genpact LTD (G) $5,282,362,314 357,182,152 65 $15.35 σ = 1.28 14.44 - 19.76 View Transactions
IHS Inc. (IHS) $5,235,874,186 54,046,016 156 $96.19 σ = 20.06 52.05 - 137.06 View Transactions
General Motors Co (NO SYMBOL) $5,174,761,915 154,433,274 80 $31.36 σ = 4.27 20.35 - 38.00 View Transactions
DUNKIN' BRANDS GROUP, INC. (DNKN) $5,147,588,262 185,909,719 141 $30.8 σ = 5.96 17.77 - 51.34 View Transactions
Vantiv, Inc. (VNTV) $4,991,324,764 210,256,976 165 $24.09 σ = 4.74 16.07 - 34.10 View Transactions
Warner Chilcott plc (WCRX) $4,906,107,912 281,010,887 260 $18.7 σ = 4.44 11.41 - 28.32 View Transactions
Hilton Worldwide Holdings Inc. (HLT) $4,648,588,052 212,494,565 8 $22.21 σ = 1.48 19.27 - 25.02 View Transactions
General Growth Properties, Inc. (GGP) $4,264,388,859 256,474,593 23 $17.69 σ = 3.49 14.25 - 24.48 View Transactions
ING U.S., Inc. (VOYA) $3,925,576,772 135,070,207 28 $26.82 σ = 7.44 19.50 - 38.85 View Transactions
SYBASE INC (SYBS) $3,794,698,248 58,422,337 79 $43.81 σ = 5.47 40.57 - 65.00 View Transactions

Click here to see the top 200 insider transactions by value.