Ownership Submission
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

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
Ackerman Robert Carl
   2. Issuer Name and Ticker or Trading Symbol
CROWN CASTLE INTERNATIONAL CORP [CCI] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
SVP-COO-Towers and Small Cell
(Last)
(First)
(Middle)
1220 AUGUSTA DRIVE SUITE 600		 3. Date of Earliest Transaction (Month/Day/Year)
02/19/2019
(Street)

HOUSTON, TX 77057		 4. If Amendment, Date Original Filed(Month/Day/Year)
 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)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction 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 $0.01 Par Value 02/19/2019   M   6,832 A $ 0 15,908 D  
Common Stock $0.01 Par Value 02/19/2019   M   945 A $ 0 16,853 D  
Common Stock $0.01 Par Value 02/19/2019   M   925 A $ 0 17,778 D  
Common Stock $0.01 Par Value 02/19/2019   M   2,512 A $ 0 20,290 D  
Common Stock $0.01 Par Value 02/19/2019   F   3,654 (1) D $ 120.13 16,636 D  
Common Stock $0.01 Par Value               199 (2) I As custodian for child 1 under UTMA
Common Stock $0.01 Par Value               199 (2) I As custodian for child 2 under UTMA
Common Stock $0.01 Par Value               199 (2) I As custodian for child 3 under UTMA
Common Stock $0.01 Par Value               199 (2) I As custodian for child 4 under UTMA
Common Stock $0.01 Par Value               99 (3) I By 401(K) Plan

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(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)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Performance RSUs (4) 02/19/2019   M     6,832   (5)   (5) Common Stock 6,832 $ 0 0 D  
Time RSUs (4) 02/19/2019   M     945   (6)   (6) Common Stock 945 $ 0 0 D  
Time RSUs (4) 02/19/2019   M     925   (7)   (7) Common Stock 925 $ 0 925 D  
Time RSUs (4) 02/19/2019   M     2,512   (8)   (8) Common Stock 2,512 $ 0 5,026 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Ackerman Robert Carl
1220 AUGUSTA DRIVE SUITE 600
HOUSTON, TX 77057		       SVP-COO-Towers and Small Cell  

Signatures

 /s/ Robert Carl Ackerman   02/21/2019
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
(1) Represents shares withheld by the issurer to satisfy the Reporting Person's tax withholding obligation in connection with the vesting of certain Restricted Stock Units ("RSUs") previously granted to the Reporting Person. Such withholding is exempt from Section 16(b) pursuant to Rule 16b-3(e).
(2) The reporting person disclaims beneficial ownership of these shares, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.
(3) Represents shares previously acquired in transactions exempt under Rule 16b-3(c).
(4) Each RSU is issued pursuant to the Company's 2013 Long-Term Incentive Plan and represents a contingent right to receive one share of common stock, and vesting (i.e., forfeiture restriction termination) generally is subject to (i) the reporting person remaining an employee or director of the Company or its affiliates and (ii) the other criteria described in the footnotes below.
(5) 6,832 Performance RSUs vested on February 19, 2019, based upon the Company's total stockholder return performance ranking relative to a peer group of companies approved by the Company's board of directors for the three year period ended February 18, 2019. The remainder of the original Performance RSUs granted in February 2016 did not vest on February 19, 2019 and were forfeited.
(6) These Time RSUs were previously granted on February 18, 2016. 33 1/3% of the original grant amount of these Time RSUs vest on February 19 of each of 2017, 2018 and 2019.
(7) These Time RSUs were previously granted on February 16, 2017. 33 1/3% of the original grant amount of these Time RSUs vest on February 19 of each of 2018, 2019 and 2020.
(8) These Time RSUs were previously granted on February 21, 2018. 33 1/3% of the original grant amount of these Time RSUs vest on February 19 of each of 2019, 2020 and 2021.

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