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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1411207	Allison Transmission Holdings Inc	ALSN	Motor Vehicle Parts & Accessories (3714)	000000000

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1543602	G. Michael Headly	One Allison Way Indianapolis IN 46222	Svp, Global Mss	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
Common Stock	Acquisiton	2014-12-15	35,000	$0.00	60,725	No	4	M	Direct
Common Stock	Disposition	2014-12-15	16,223	$33.62	44,502	No	4	F	Direct
Common Stock	Acquisiton	2014-12-15	1,196	$0.00	45,698	No	4	M	Direct
Common Stock	Disposition	2014-12-15	558	$33.62	45,140	No	4	F	Direct
Common Stock	Disposition	2014-12-15	5,400	$33.46	39,740	No	4	S	Direct

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

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Restricted Stock Units	Disposition	2014-12-15	35,000	$0.00	35,000	$0.00
Common Stock	Dividend Equivalent Rights	Disposition	2014-12-15	1,196	$0.00	1,196	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0			No	4	M	Direct
167			No	4	M	Direct

Footnotes

Settlement of restricted stock units ("RSUs"). On December 21, 2012, the reporting person was granted 50,000 RSUs, vesting in two installments as follows: 15,000 on June 30, 2013 and 35,000 on December 15, 2014. Each RSU represents a contingent right to receive one share of Allison Transmission Holdings, Inc. ("ALSN") common stock.
Represents shares withheld by ALSN to satisfy tax withholding obligations on the vesting of RSUs.
Settlement of dividend equivalent rights ("DERs"). The DERs accrued when and as dividends were paid on ALSN common stock and vest proportionately with the RSU to which they relate. Each DER is the economic equivalent of one share of ALSN common stock.
Represents shares withheld by ALSN to satisfy tax withholding obligations on the vesting of DERs.
The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.
The price reported is a weighted average price. These shares were sold in multiple transactions at per share prices ranging from $33.2800 to $33.6900. The reporting person undertakes to provide the Company, any security holder of the Company or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.