ALSN

SEC source: 0001411207-16-000398 · edgar.xml · nonDerivative · entry 1

Dean Sharon L. · CIK 0001543488 · VP, Quality and Reliability

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,906

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001411207-16-000389 · edgar.xml · nonDerivative · entry 1

Scroggins Eric C. · CIK 0001543507 · VP, Gen. Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,083

SEC source: 0001418812-16-000195 · primary_doc.xml · nonDerivative · entry 1

ValueAct Holdings, L.P. · CIK 0001418814 · Director · See Remarks

ValueAct Capital Master Fund, L.P. · CIK 0001464912 · Director · See Remarks

VA Partners I, LLC · CIK 0001418812 · Director · See Remarks

ValueAct Capital Management, L.P. · CIK 0001351069 · Director · See Remarks

ValueAct Capital Management, LLC · CIK 0001351073 · Director · See Remarks

ValueAct Holdings GP, LLC · CIK 0001418813 · Director · See Remarks

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 14,825,204

F1 · ownership.nature: Each reporting person listed herein disclaims beneficial ownership of the reported securities except to the extent of its pecuniary interest therein, and this report shall not be deemed an admission that such person is the beneficial owner of the securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.

F2 · ownership.nature: The ValueAct entities referred to in this footnote 2 are collectively referred to herein as "ValueAct Capital." The securities reported herein are directly beneficially owned by ValueAct Capital Master Fund, L.P. and may be deemed to be indirectly beneficially owned by (i) VA Partners I, LLC as General Partner of ValueAct Capital Master Fund, L.P., (ii) ValueAct Capital Management, L.P. as the manager of ValueAct Capital Master Fund, L.P., (iii) ValueAct Capital Management, LLC as General Partner of ValueAct Capital Management, L.P., (iv) ValueAct Holdings, L.P. as the sole owner of the limited partnership interests of ValueAct Capital Management, L.P. and the membership interests of ValueAct Capital Management, LLC and as the majority owner of the membership interests of VA Partners I, LLC and (v) ValueAct Holdings GP, LLC as General Partner of ValueAct Holdings, L.P.

SEC source: 0001411207-16-000387 · edgar.xml · derivative · entry 3

Dick Michael · CIK 0001661740 · SVP, Ops and Purchasing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 24,936 shares

Expires 2017-10-01

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_date: The option vested in five equal annual installments beginning on August 7, 2008.

SEC source: 0001411207-16-000387 · edgar.xml · nonDerivative · entry 2

Dick Michael · CIK 0001661740 · SVP, Ops and Purchasing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 41,722

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F2 · price: This price reported is a weighted average price. These shares were sold in multiple transactions at per share prices ranging from $29.0000 to $29.7750. 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.

SEC source: 0001411207-16-000387 · edgar.xml · nonDerivative · entry 1

Dick Michael · CIK 0001661740 · SVP, Ops and Purchasing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 66,658

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000911916-16-000685 · edgar.xml · derivative · entry 1

Coll John · CIK 0001687117 · SVP, Global MSS

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,000

Underlying: Common Stock · 21,000 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock units ("RSUs") represents a contingent right to receive one share of Allison Transmission Holdings, Inc. (the "Company") common stock.

F2 · derivative.exercise_date: The RSUs vest in equal installments on July 1, 2017, 2018 and 2019.

F2 · derivative.expiration_date: The RSUs vest in equal installments on July 1, 2017, 2018 and 2019.

SEC source: 0001411207-16-000379 · edgar.xml · derivative · entry 1

LAVIN RICHARD P · CIK 0001171774 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 38

Underlying: Common Stock · 19 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent rights is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent rights is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent rights is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0001411207-16-000381 · edgar.xml · derivative · entry 1

RABAUT THOMAS W · CIK 0001241605 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 39

Underlying: Common Stock · 20 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and deferred stock units ("DSUs") and vest proportionately with the RSUs and DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and deferred stock units ("DSUs") and vest proportionately with the RSUs and DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and deferred stock units ("DSUs") and vest proportionately with the RSUs and DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0001418812-16-000178 · primary_doc.xml · derivative · entry 2

Spivy Gregory P · CIK 0001310679 · Director · 10% owner · See Remarks

ValueAct Holdings, L.P. · CIK 0001418814 · Director · 10% owner · See Remarks

ValueAct Capital Master Fund, L.P. · CIK 0001464912 · Director · 10% owner · See Remarks

VA Partners I, LLC · CIK 0001418812 · Director · 10% owner · See Remarks

ValueAct Capital Management, L.P. · CIK 0001351069 · Director · 10% owner · See Remarks

ValueAct Capital Management, LLC · CIK 0001351073 · Director · 10% owner · See Remarks

ValueAct Holdings GP, LLC · CIK 0001418813 · Director · 10% owner · See Remarks

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 38

Underlying: Common Stock · 19 shares

Expires not disclosed

F3 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F3 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F3 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F4 · ownership.direct: The ValueAct entities referred to in this footnote 4 are collectively referred to herein as "ValueAct Capital." Under an agreement with ValueAct Capital, Gregory P. Spivy is deemed to hold the common stock for the benefit of the limited partners of ValueAct Capital Master Fund, L.P., (ii) ValueAct Capital Management, L.P. as the manager of ValueAct Capital Master Fund, L.P., (iii) ValueAct Capital Management, LLC as General Partner of ValueAct Capital Management, L.P., (iv) ValueAct Holdings, L.P. as the sole owner of the limited partnership interests of ValueAct Capital Management, L.P. and the membership interests of ValueAct Capital Management, LLC and as the majority owner of the membership interests of VA Partners I, LLC and (v) ValueAct Holdings GP, LLC as General Partner of ValueAct Holdings, L.P.

SEC source: 0001411207-16-000370 · edgar.xml · derivative · entry 1

ASKREN STANLEY A · CIK 0001195347 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 38

Underlying: Common Stock · 19 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent rights is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent rights is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent rights is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0001411207-16-000384 · edgar.xml · derivative · entry 1

Scroggins Eric C. · CIK 0001543507 · VP, Gen. Counsel and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 267

Underlying: Common Stock · 43 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent rights is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent rights is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent rights is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0001411207-16-000385 · edgar.xml · derivative · entry 1

STAR JAMES A · CIK 0001260705 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 38

Underlying: Common Stock · 19 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent rights is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent rights is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent rights is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0001411207-16-000383 · edgar.xml · derivative · entry 1

Reynolds Richard VanFleet · CIK 0001367016 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 584

Underlying: Common Stock · 78 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0001411207-16-000382 · edgar.xml · derivative · entry 1

RABORN FRANCIS · CIK 0001241606 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 38

Underlying: Common Stock · 19 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0001411207-16-000380 · edgar.xml · derivative · entry 1

Pittard Dana JH · CIK 0001661939 · VP, Defense Programs

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 52

Underlying: Common Stock · 17 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent rights is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent rights is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent rights is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0001411207-16-000378 · edgar.xml · derivative · entry 1

Kirk Randall R. · CIK 0001543603 · SVP, Prod Eng & Product Team

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 98

Underlying: Common Stock · 32 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0001411207-16-000377 · edgar.xml · derivative · entry 1

Graziosi David S. · CIK 0001543492 · President, CFO and Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 229

Underlying: Common Stock · 75 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0001411207-16-000376 · edgar.xml · derivative · entry 1

GARCIA TUNON ALVARO · CIK 0001244225 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 72

Underlying: Common Stock · 34 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent rights is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent rights is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent rights is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0001411207-16-000375 · edgar.xml · derivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 221

Underlying: Common Stock · 46 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0001411207-16-000374 · edgar.xml · derivative · entry 1

Dick Michael · CIK 0001661740 · SVP, Ops and Purchasing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 393

Underlying: Common Stock · 66 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent rights is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent rights is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent rights is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0001411207-16-000373 · edgar.xml · derivative · entry 1

Dewey Lawrence E. · CIK 0001543489 · Chairman and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 665

Underlying: Common Stock · 218 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0001411207-16-000372 · edgar.xml · derivative · entry 1

Denison David · CIK 0001564787 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,016

Underlying: Common Stock · 133 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0001411207-16-000371 · edgar.xml · derivative · entry 1

Dean Sharon L. · CIK 0001543488 · VP, Quality and Reliability

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 237

Underlying: Common Stock · 37 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent rights is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent rights is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded restricted stock units ("RSUs") and vest proportionately with the RSUs to which they relate. Each dividend equivalent rights is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.