Kunz John E

Row 1 · 2023-02-15 · Grant · Acquired 19,510 · Balance 51,128

F1: The Form 4 filed by the reporting person on February 16, 2023 inadvertently excluded restricted stock granted under the Company's Amended and Restated 2019 Equity and Incentive Compensation Plan, which is expected to vest in three equal installments on February 15, 2024, February 15, 2025, and February 15, 2026, subject to the terms of the grant agreement between the Company and the reporting person. This amendment reports all of the shares beneficially owned by the reporting person following the transactions reported on the original Form 4.

Row 1 · 2021-08-17 · Gift · Disposed 1,351 · Balance 37,254

Row 2 · 2021-08-26 · Disposition to issuer · Disposed 37,254 · Balance 0

F1: Pursuant to the terms of the Agreement and Plan of Merger, dated as of June 6, 2021, by and among U.S. Concrete, Inc. (the "Issuer"), Vulcan Materials Company, and Grizzly Merger Sub I, Inc. (the "Merger Agreement"), on August 26, 2021, each share of the Issuer's common stock ("Common Stock") issued and outstanding immediately prior to the Effective Time (as defined in the Merger Agreement) and not otherwise excluded pursuant to the terms of the Merger Agreement, was converted into the right to receive $74.00 per share in cash (the "Merger Consideration"), without interest, subject to any required withholding taxes described in the Merger Agreement.

Row 3 · 2021-08-26 · Disposition to issuer · Disposed 9,240 · Balance 0

F2: Each Restricted Stock Unit was granted from the U.S. Concrete, Inc. Long Term Incentive Plan and represents the right to receive one share of common stock upon vesting.

F4: At the Effective Time, pursuant to the Merger Agreement, each Restricted Stock Unit in respect of the Issuer's Common Stock ("Company RSUs") that was outstanding as of and immediately prior to the Effective Time was cancelled and converted into the right to receive an amount in cash equal to the product of (i) the total number of Issuer Common Stock subject to such Company RSUs and (ii) the Merger Consideration, subject to applicable withholding taxes.

F3: These Restricted Stock Units were granted on March 1, 2020 with time-based vesting and were scheduled to vest in equal installments on March 1, 2022 and March 1, 2023.

Row 4 · 2021-08-26 · Disposition to issuer · Disposed 3,260 · Balance 0

F2: Each Restricted Stock Unit was granted from the U.S. Concrete, Inc. Long Term Incentive Plan and represents the right to receive one share of common stock upon vesting.

F4: At the Effective Time, pursuant to the Merger Agreement, each Restricted Stock Unit in respect of the Issuer's Common Stock ("Company RSUs") that was outstanding as of and immediately prior to the Effective Time was cancelled and converted into the right to receive an amount in cash equal to the product of (i) the total number of Issuer Common Stock subject to such Company RSUs and (ii) the Merger Consideration, subject to applicable withholding taxes.

F5: These Restricted Stock Units were granted on March 1, 2019 with time-based vesting and were scheduled to vest on March 1, 2022.

Row 5 · 2021-08-26 · Disposition to issuer · Disposed 15,384 · Balance 0

F2: Each Restricted Stock Unit was granted from the U.S. Concrete, Inc. Long Term Incentive Plan and represents the right to receive one share of common stock upon vesting.

F4: At the Effective Time, pursuant to the Merger Agreement, each Restricted Stock Unit in respect of the Issuer's Common Stock ("Company RSUs") that was outstanding as of and immediately prior to the Effective Time was cancelled and converted into the right to receive an amount in cash equal to the product of (i) the total number of Issuer Common Stock subject to such Company RSUs and (ii) the Merger Consideration, subject to applicable withholding taxes.

F6: These Restricted Stock Units were granted on March 1, 2021 and were to vest as follows: (i) 75% were time-based with vesting to have occurred in equal installments on March 1, 2022, March 1, 2023 and March 1, 2024, and (ii) the remaining 25% were performance-based with vesting to have occurred once the average of the daily VWAP of the Issuer's stock over any period of 20 consecutive trading days attained $74.95 per share within the three year period from the date of grant.