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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) $24,324,160,342 668,673,857 223 $35.3 σ = 9.62 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) $16,118,607,208 471,947,306 180 $35.05 σ = 5.73 26.89 - 47.69 View Transactions
Sensata Technologies Holding N.V. (ST) $14,612,863,233 455,587,945 75 $30.11 σ = 6.84 16.92 - 40.54 View Transactions
Activision Blizzard, Inc. (ATVI) $11,570,559,020 833,364,314 37 $14.31 σ = 2.89 8.47 - 20.76 View Transactions
MICROSOFT CORP (MSFT) $10,903,561,825 377,525,929 169 $29.35 σ = 4.43 23.79 - 44.54 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
Google Inc. (GOOG) $9,661,170,008 13,778,313 8495 $695.42 σ = 185.88 25.00 - 1226.39 View Transactions
BlackRock Inc. (BLK) $6,973,049,123 46,931,903 396 $184.48 σ = 30.06 0.00 - 320.06 View Transactions
KAR Auction Services, Inc. (KAR) $6,606,826,741 298,060,810 148 $18.93 σ = 5.67 11.43 - 30.23 View Transactions
MRC GLOBAL INC. (MRC) $6,531,068,292 275,717,336 27 $24.33 σ = 4.38 19.74 - 32.58 View Transactions
GENERAC HOLDINGS INC. (GNRC) $6,175,040,961 173,459,814 123 $33.22 σ = 7.05 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) $5,282,334,944 357,180,557 64 $15.32 σ = 1.27 14.44 - 19.76 View Transactions
IHS Inc. (IHS) $5,233,865,789 54,030,016 149 $94.78 σ = 19.38 52.05 - 137.06 View Transactions
General Motors Co (NO SYMBOL) $5,174,305,110 154,419,770 78 $31.29 σ = 4.3 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) $4,990,777,539 210,239,475 158 $23.77 σ = 4.59 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) $4,647,868,327 212,465,799 7 $21.8 σ = 1.1 19.27 - 22.80 View Transactions
General Growth Properties, Inc. (GGP) $4,264,316,128 256,471,622 22 $17.38 σ = 3.25 14.25 - 24.43 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.