FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

Reynolds Richard VanFleet
2. Issuer Name and Ticker or Trading Symbol

Allison Transmission Holdings Inc [ ALSN ]
5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

__X__ Director                    _____ 10% Owner
_____ Officer (give title below)    _____ Other (specify below)
(Last)          (First)          (Middle)

C/O ALLISON TRANSMISSION HOLDINGS, INC., ONE ALLISON WAY
3. Date of Earliest Transaction (MM/DD/YYYY)

5/3/2023
(Street)

INDIANAPOLIS, IN 46222
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

_X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)        (State)        (Zip)
Rule 10b5-1(c) Transaction Indication
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock (1)5/3/2023  M  37044 (2)A$0 37044 D  

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security3. Trans. Date3A. Deemed Execution Date, if any4. Trans. Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
6. Date Exercisable and Expiration Date7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Deferred Stock Units  (3)5/3/2023  M     4068   (4) (4)Common Stock 4068 $0 0 D  
Dividend Equivalent Rights  (5)5/3/2023  M     3523   (6) (6)Common Stock 3523 $0 0 D  
Deferred Stock Units  (3)5/3/2023  M     3466   (7) (7)Common Stock 3466 $0 0 D  
Deferred Stock Units  (3)5/3/2023  M     3162   (8) (8)Common Stock 3162 $0 0 D  
Deferred Stock Units  (3)5/3/2023  M     3628   (9) (9)Common Stock 3628 $0 0 D  
Deferred Stock Units  (3)5/3/2023  M     3185   (10) (10)Common Stock 3185 $0 0 D  
Deferred Stock Units  (3)5/3/2023  M     2859   (11) (11)Common Stock 2859 $0 0 D  
Deferred Stock Units  (3)5/3/2023  M     2880   (12) (12)Common Stock 2880 $0 0 D  
Deferred Stock Units  (3)5/3/2023  M     3600   (13) (13)Common Stock 3600 $0 0 D  
Deferred Stock Units  (3)5/3/2023  M     2927   (14) (14)Common Stock 2927 $0 0 D  
Deferred Stock Units  (3)5/3/2023  M     3746   (15) (15)Common Stock 3746 $0 0 D  

Explanation of Responses:
(1) Represents the deferred stock units ("DSUs") and dividend equivalents payable upon the reporting person's separation from service. The reporting person did not stand for re-election at Allison Transmission Holdings, Inc.'s (the "Company") 2023 annual meeting of stockholders and his term ended on May 3, 2023.
(2) Includes 33,521 DSUs and 3,523 related dividend equivalents.
(3) Each DSU is the economic equivalent of one share of the Company's common stock. The DSUs become payable, in common stock, or at the Company's election cash, at the earlier of the reporting person's separation from service or a change in control. DSUs earn dividend equivalents when dividends are declared on the Company's common stock.
(4) On May 9, 2013, the reporting person was granted 4,068 DSUs that vested on May 8, 2014.
(5) Each dividend equivalent right is the economic equivalent of one share of the Company's common stock.
(6) The dividend equivalent rights accrued on previously awarded DSUs and were payable on May 3, 2023, the date of the reporting person's separation from service.
(7) On May 9, 2014, the reporting person was granted 3,466 DSUs that vested on May 14, 2015.
(8) On May 15, 2015, the reporting person was granted 3,162 DSUs that vested on May 12, 2016.
(9) On May 13, 2016, the reporting person was granted 3,628 DSUs that vested on May 12, 2017.
(10) On May 12, 2017, the reporting person was granted 3,185 DSUs that vested on May 10, 2018.
(11) On May 10, 2018, the reporting person was granted 2,859 DSUs that vested on May 9, 2019.
(12) On May 9, 2019, the reporting person was granted 2,880 DSUs that vested on May 6, 2020.
(13) On May 7, 2020, the reporting person was granted 3,600 DSUs that vested on May 5, 2021.
(14) On May 6, 2021, the reporting person was granted 2,927 DSUs that vested on May 4, 2022.
(15) On May 5, 2022, the reporting person was granted 3,746 DSUs that vested on May 3, 2023.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
Reynolds Richard VanFleet
C/O ALLISON TRANSMISSION HOLDINGS, INC.
ONE ALLISON WAY
INDIANAPOLIS, IN 46222
X



Signatures
/s/ Eric C. Scroggins, attorney-in-fact5/5/2023
**Signature of Reporting PersonDate


Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
*If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note:File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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