Sec Form 4 Filing - Gerratt Eric L @ US Ecology, Inc. - 2019-11-01

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 Gerratt Eric L 2. Issuer Name and Ticker or Trading Symbol US Ecology, Inc. [ ECOL] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) EVP and CFO (Last) (First) (Middle) 101 S. CAPITOL BLVD., SUITE 1000 3. Date of Earliest Transaction (MM/DD/YY) 11/01/2019 (Street) BOISE, ID83702 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 11/01/2019 A 27,553 A 27,553 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) Date Exercisable Expiration Date Title Amount or Number of Shares Stock Options $ 49.97 ( 2 ) 11/01/2019 A 8,500 ( 2 ) 03/10/2016( 3 ) 03/09/2025 Common Stock 8,500 $ 0 ( 2 ) 8,500 D Stock Options $ 35.05 ( 2 ) 11/01/2019 A 2,300 ( 2 ) 01/04/2017( 3 ) 01/03/2026 Common Stock 2,300 $ 0 ( 2 ) 2,300 D Stock Options $ 49.15 ( 2 ) 11/01/2019 A 6,000 ( 2 ) 01/02/2018( 4 ) 01/01/2027 Common Stock 6,000 $ 0 ( 2 ) 6,000 D Stock Options $ 51 ( 2 ) 11/01/2019 A 6,900 ( 2 ) 01/01/2019( 4 ) 01/01/2028 Common Stock 6,900 $ 0 ( 2 ) 6,900 D Stock Options $ 63.85 ( 2 ) 11/01/2019 A 6,100 ( 2 ) 01/01/2020( 4 ) 01/01/2029 Common Stock 6,100 $ 0 ( 2 ) 6,100 D Performance Stock Units $ 0 ( 2 ) ( 5 ) 11/01/2019 A 2,000 ( 2 ) ( 5 ) 12/31/2019( 5 ) Common Stock 2,000 $ 0 ( 2 ) 2,000 D Performance Stock Units $ 0 ( 2 ) ( 5 ) 11/01/2019 A 2,400 ( 2 ) ( 5 ) 12/31/2020( 5 ) Common Stock 2,400 $ 0 ( 2 ) 2,400 D Performance Stock Units $ 0 ( 2 ) ( 6 ) 11/01/2019 A 2,847 ( 2 ) ( 6 ) 12/31/2021( 6 ) Common Stock 2,847 $ 0 ( 2 ) 2,847 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Gerratt Eric L 101 S. CAPITOL BLVD. SUITE 1000 BOISE, ID83702 EVP and CFO Signatures /s/ Wayne Ipsen, power of attorney 11/01/2019 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Acquired pursuant to that certain Agreement and Plan of Merger, dated as of June 23, 2019 ("Merger Agreement"), by and among US Ecology Holdings, Inc. (f/k/a US Ecology, Inc.) ("Parent"), NRC Group Holdings Corp., US Ecology, Inc. (f/k/a US Ecology Parent, Inc.) ("Holdco"), ECOL Merger Sub, Inc. ("ECOL Merger Sub") and Rooster Merger Sub, Inc., in a merger transaction in which ECOL Merger Sub merged with and into Parent, and each issued and outstanding share of Parent's common stock was converted into the right to receive, and became exchangeable for, one share of common stock, par value $0.01 of Holdco. ( 2 )All outstanding derivative securities of Parent, which include Options and Performance Stock Units ("PSUs"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award. ( 3 )These Options are fully vested and exercisable. ( 4 )Options vest ratably on the anniversary of the date of original issuance for a period of three years. Upon vesting, the reporting person will receive a number of shares of common stock equal to the number of Options that have vested. ( 5 )Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on Parent's total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the PSUs. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date. ( 6 )Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on achievement of established targets with respect to the Parent's Adjusted Earnings Per Share and Return on Invested Capital, each weighted at 50% of the target PSUs. After the payout under the PSUs is determined, the number of shares to be provided is subject to modification based on th e percentage change in the price of the Parent's common stock from January 1, 2019 to December 31, 2021, relative to the percentage change in the price of the common stock of certain peer group companies. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date.

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