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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
5768	American Science & Engineering Inc.	ASEI	X-Ray Apparatus & Tubes & Related Irradiation Apparatus (3844)	042240991

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1353376	George Peterman	American Science And Engineering, Inc. 829 Middlesex Turnpike Billerica MA 01821	Svp	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2011-05-12	1,540	$85.97	9,587	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Direct

Footnotes

On June 12, 2008, the reporting person was granted a restricted stock award for 2519 shares of common stock. The award vests based on satisfaction of certain performance criteria within a five year period from date of grant. The performance criteria was met for all of the shares, resulting in vesting of the award as to 2519 shares. On May 15, 2009, the reporting person was granted a restricted stock award for 3818 shares of common stock. The award vests based on satisfaction of certain performance criteria within a five year period from date of grant. The performance criteria was met as to two thirds of the shares, resulting in vesting of the award as to 2545 shares.
The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from a low of $85.77 to a high of $86.24 for an average of $85.97. The reporting person undertakes to provide to American Science and Engineering, Inc., any security holder of American Science and Engineering, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote to this Form 4.