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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1374535	Altra Holdings Inc.	AIMC	General Industrial Machinery & Equipment, Nec (3569)	611478870

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1383274	R Carl Christenson	300 Granite Street Suite 201 Braintree MA 02184	Chief Executive Officer	Yes	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
Common Stock, Par Value $0.001	Disposition	2013-01-02	1,200	$23.00	492,005	No	4	S	Direct
Common Stock, Par Value $0.001	Disposition	2013-01-03	100	$23.00	491,905	No	4	S	Direct
Common Stock, Par Value $0.001	Disposition	2013-01-04	2,737	$23.00	489,168	No	4	S	Direct
Common Stock, Par Value $0.001	Disposition	2013-01-04	800	$23.01	488,368	No	4	S	Direct
Common Stock, Par Value $0.001	Disposition	2013-01-04	100	$23.02	488,268	No	4	S	Direct

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

Footnotes

Shares sold pursuant to 10b5-1 plan
The sales reported in this Form 4 constitute a "matching" transaction under Section 16(b) of the Securities Exchange Act of 1934, as amended, with respect to 1,497 of such shares, with the reporting person's purchase of 1,497 shares of the issuer's common stock on August 1, 2012. Upon settlement of the sale of such shares, the reporting person will disgorge to the issuer the full amount of the profit realized in connection with such short swing transaction, less transaction costs.