Sec Form 4 Filing - Roby Anne K @ PRAXAIR INC - 2018-01-11

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 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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1. Name and Address of Reporting Person Roby Anne K 2. Issuer Name and Ticker or Trading Symbol PRAXAIR INC [ PX] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Senior Vice President (Last) (First) (Middle) C/O PRAXAIR, INC., 10 RIVERVIEW DRIVE 3. Date of Earliest Transaction (MM/DD/YY) 01/11/2018 (Street) DANBURY, CT06810 4. If Amendment, Date Original Filed (MM/DD/YY) 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 (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 1,135.6102 I 401(k) Common Stock 01/11/2018 M 10,230 A $ 76.16 28,200 D Common Stock 01/11/2018 F 6,635 ( 1 ) D $ 165.52 21,565 D

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 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) Da te Exercisable Expiration Date Title Amount or Number of Shares Stock Option (right to buy) $ 76.16 01/11/2018 M 10,230 02/23/2011( 2 ) 02/23/2020 Common Stock 10,230 $ 0 0 D Stock Option (right to buy) $ 97.84 02/22/2012( 2 ) 02/22/2021 Common Stock 13,195 13,195 D Stock Option (right to buy) $ 109.68 02/28/2013( 2 ) 02/28/2022 Common Stock 18,430 18,430 D Stock Option (right to buy) $ 110.58 02/26/2014( 2 ) 02/26/2023 Common Stock 15,790 15,790 D Stock Option (right to buy) $ 128.8 02/25/2015( 2 ) 02/25/2024 Common Stock 19,900 19,900 D Stock Option (right to buy) $ 128.38 02/24/2016( 3 ) 02/24/2025 Common Stock 26,490 26,490 D Stock Option (right to buy) $ 102.22 02/23/2017( 4 ) 02/23/2026 Common Stock 49,405 49,405 D Stock Option (right to buy) $ 118.71 02/28/2018( 5 ) 02/28/2027( 5 ) Common Stock 39,585 39,585 D Deferred Stock $ 0 ( 6 ) ( 7 ) ( 7 ) Common Stock 4,260.818 4,260.818 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Roby Anne K C/O PRAXAIR, INC. 10 RIVERVIEW DRIVE DANBURY, CT06810 Senior Vice President Signatures Anthony M. Pepper, Attorney-in-Fact 01/15/2018 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Shares of common stock withheld to pay the option exercise price, taxes and fees. No market sale of shares occurred. The reporting person acquired and held 3,595 shares net of the shares withheld. ( 2 )This option became exercisable in three (3) equal annual installments beginning on the first anniversary of the date of grant. ( 3 )This option vests over three years in three consecutive equal annual installments beginning on February 24, 2016. ( 4 )This option vests over three years in three consecutive equal annual installments beginning on February 23, 2017. ( 5 )This option vests over three years in three consecutive equal annual installments beginning on February 28, 2018. ( 6 )Conversion to Praxair Common Stock is on a 1-for-1 basis. ( 7 )Deferred stock units acquired under the Praxair, Inc. Compensation Deferral Plan as amended ("Deferral Plan") and are to be settled in Praxair Common Stock.

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* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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