X0303 4 2011-05-20 0001050446 MICROSTRATEGY INC MSTR 0001079782 SAYLOR MICHAEL J C/O MICROSTRATEGY INCORPORATED 1850 TOWERS CRESCENT PLAZA TYSONS CORNER VA 22182 1 1 1 0 Chairman, President and CEO 0001269225 ALCANTARA LLC C/O MICHAEL J. SAYLOR 1850 TOWERS CRESCENT PLAZA TYSONS CORNER VA 22182 0 0 1 0 Class A Common Stock 2011-05-20 4 C 0 30000 A 30000 I Shares owned by LLC Class A Common Stock 2011-05-20 4 S 0 3800 139.84 D 26200 I Shares owned by LLC Class A Common Stock 2011-05-20 4 S 0 600 139.8401 D 25600 I Shares owned by LLC Class A Common Stock 2011-05-20 4 S 0 999 139.85 D 24601 I Shares owned by LLC Class A Common Stock 2011-05-20 4 S 0 400 139.86 D 24201 I Shares owned by LLC Class A Common Stock 2011-05-20 4 S 0 400 139.8605 D 23801 I Shares owned by LLC Class A Common Stock 2011-05-20 4 S 0 100 139.87 D 23701 I Shares owned by LLC Class A Common Stock 2011-05-20 4 S 0 540 139.8901 D 23161 I Shares owned by LLC Class A Common Stock 2011-05-20 4 S 0 900 139.8903 D 22261 I Shares owned by LLC Class A Common Stock 2011-05-20 4 S 0 101 139.90 D 22160 I Shares owned by LLC Class A Common Stock 2011-05-20 4 S 0 100 139.91 D 22060 I Shares owned by LLC Class A Common Stock 2011-05-20 4 S 0 900 139.9101 D 21160 I Shares owned by LLC Class A Common Stock 2011-05-20 4 S 0 300 139.96 D 20860 I Shares owned by LLC Class A Common Stock 2011-05-20 4 S 0 100 140.01 D 20760 I Shares owned by LLC Class A Common Stock 2011-05-20 4 S 0 192 140.04 D 20568 I Shares owned by LLC Class A Common Stock 2011-05-20 4 S 0 8 140.0401 D 20560 I Shares owned by LLC Class A Common Stock 2011-05-20 4 S 0 200 140.0405 D 20360 I Shares owned by LLC Class A Common Stock 2011-05-20 4 S 0 200 140.17 D 20160 I Shares owned by LLC Class A Common Stock 2011-05-20 4 S 0 492 140.28 D 19668 I Shares owned by LLC Class A Common Stock 2011-05-20 4 S 0 200 140.2801 D 19468 I Shares owned by LLC Class A Common Stock 2011-05-20 4 S 0 868 140.29 D 18600 I Shares owned by LLC Class A Common Stock 2011-05-20 4 S 0 700 140.2901 D 17900 I Shares owned by LLC Class A Common Stock 2011-05-20 4 S 0 1000 140.2903 D 16900 I Shares owned by LLC Class A Common Stock 2011-05-20 4 S 0 400 140.30 D 16500 I Shares owned by LLC Class A Common Stock 2011-05-20 4 S 0 13600 140.39 D 2900 I Shares owned by LLC Class A Common Stock 2011-05-20 4 S 0 1000 140.3901 D 1900 I Shares owned by LLC Class A Common Stock 2011-05-20 4 S 0 500 140.40 D 1400 I Shares owned by LLC Class A Common Stock 2011-05-20 4 S 0 100 140.41 D 1300 I Shares owned by LLC Class A Common Stock 2011-05-20 4 S 0 200 140.5301 D 1100 I Shares owned by LLC Class A Common Stock 2011-05-20 4 S 0 200 140.5501 D 900 I Shares owned by LLC Class B Common Stock 2011-05-20 4 C 0 30000 D Class A Common Stock 30000 2220000 I Shares owned by LLC These shares were acquired upon conversion of shares of Class B Common Stock, which were convertible on a 1-for-1 basis into shares of Class A Common Stock. Shares that are indicated as being "owned by LLC" are owned directly by Alcantara LLC (the "LLC"), and indirectly by Mr. Saylor as the sole member of the LLC. The LLC's address is the same as Mr. Saylor's address. The LLC has designated Mr. Saylor as the designated filer. Mr. Saylor is an officer, director and ten percent owner of the issuer. Separate open market sale transactions that were executed on 05/20/2011 at the same price have been reported on an aggregate basis on a single line in Table I. The order in which sale transactions are set forth in Table I is not necessarily reflective of the sequence in which the sale transactions occurred in fact. Shares of Class B Common Stock are convertible immediately upon receipt into shares of Class A Common Stock on a 1-for-1 basis and have no expiration date. See Exhibit A. This is the first Form 4 of two Form 4 filings made by the reporting person to report transactions that occurred on May 20, 2011. /s/ Michael J. Saylor, Individually and as Sole Member of Alcantara LLC 2011-05-24