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Exhibit 2.2

EXECUTION VERSION

ADDENDUM TO SHARE SALE AND PURCHASE AGREEMENT

This addendum (the “Addendum”) to share sale and purchase agreement entered into between the Parties (as defined below) on December 2, 2015 (the “Agreement”) has been made on March 1, 2016 by and among:

Buyer and the US Buyer are below jointly referred to as Buyers. Buyers, Altor and Seller are jointly referred to as the “Parties”.

(j) the aggregate net Loss (without regard to the exclusions set forth in the definition of “Loss”) of Ampco and each of its Affiliates in connection with the production or supply of rolls to ÅAB in relation to rolls formerly produced at the Åkers France Thionville facility, as agreed to be supplied by Ampco or any of its Affiliates between and including December 2, 2015 and the Closing Date, as set out in Schedule 2.1(i), calculated as Ampco’s and/or its Affiliates’ direct variable costs for producing such rolls (including direct material costs (e.g. scrap, alloys, purchase price for blanks, inbound transportation costs), estimated warranty claim costs in line with current levels of actual warranty claim costs for similar products produced by Ampco and/or its Affiliates, direct energy, direct wages, direct consumables and packaging, and outbound transportation costs) reduced by the direct gross margin of ÅAB for such rolls (ÅAB’s sales price minus (i) ÅAB’s direct costs minus (ii) ÅAB’s purchase price from Ampco and/or its Affiliates), such net Loss to be determined by Ampco and delivered with any supporting calculations to Seller and Altor, up to an aggregate net Loss of USD 2,250,000, provided that Ampco and its Affiliates shall use their commercially reasonable efforts to minimize such costs, including, without limitation, in relation to the choice of any subcontractor or supplier. After such delivery Seller and Altor shall have 10 Business Days to review and evaluate in good faith such net Loss calculations and notify Ampco in writing of any objections. The Parties shall negotiate in good faith to resolve any disputes regarding such net Loss calculations for up to 10 Business Days following Ampco’s receipt of such objections. Any disputes not resolved by the Parties within 10 Business Days will be resolved by the Reporting Accountants substantially in accordance with the procedures set out in paragraphs 3.2-3.10 of Schedule 2.1(c) applied mutatis mutandis; (k) the Encumbrances filed against certain Acquired Companies in favor of the Commonwealth of Pennsylvania Department of Revenue as listed on Schedule 2.1(j), together with any reasonable expenses incurred by the Buyers or any Acquired Company relating to any such Encumbrances; or (l) in furtherance and not in limitation of sub-paragraphs (c) and (d) of this definition of “Excluded Loss”, the matters listed on Schedule 2.1(k).

In the event that Closing occurs on or before March 11, 2016, the following provisions shall be added as Clause 7.3.1(l) of the Agreement:

deliver to Buyers a certificate, dated the Closing Date, signed by each of Altor and Seller, certifying that there has been no Leakage from (and excluding) the Locked-Box Date up to (and including) Closing.

With respect to the Closing Statement, the Parties have agreed, provided that Closing occurs on or before March 11, 2016, to amend Clause 4.2.1 and Clauses 2.2 and 2.3

of Part I of Schedule 2.1(c) of the Agreement so that the Closing Statement shall be drawn up and prepared as at the close of business on February 29, 2016 instead of as at the close of business on the Closing Date. Accordingly, in the event Closing occurs on or before March 11, 2016, the reference to “Closing Date” in Clauses 4.2.1 and 4.2.7 and Clauses 2.2 and 2.3 of Part I of Schedule 2.1(c) of the Agreement shall be understood as referring to the Locked-Box Date and the text “four (4) Business Days prior to” in Clause 4.2.7 shall be deleted.

Clause 4.2.3(b) of the Agreement shall be replaced in its entirety as follows:

plus the Estimated Cash and any additional Cash provided to any Acquired Company by Seller, Altor and/or SHB or any of their Affiliates by way of equity injection, capital contribution and/or other funding after the Locked-Box Date.

“Leakage” means (a) any dividend or distribution of profits or assets, or any payments in lieu of any dividend or distribution, paid or made, or any repurchase, or directors’ fees, charges or other compensation or in respect of redemption or return of share or loan capital paid, in each case by any Acquired Company to Seller or Altor or any of their respective Affiliates, (b) any payments made or agreed to be made by any Acquired Company to or for the benefit of Seller or Altor or any of their respective Affiliates, (c) the waiver or agreement to waive, by any Acquired Company, of any amount owed to that Acquired Company by Seller or Altor or any of their respective Affiliates, (d) any incentive payments, bonus or other payment of any nature payable in connection with the transactions contemplated hereunder, paid or made, or agreed to be paid or made in connection with the transactions contemplated hereunder, in each case by any Acquired Company to Seller, Altor or any of their respective Affiliates or to any employee, director, consultant, officer or non-executive director of any Acquired Company (including, without limitation, the Transaction Bonus), (e) any liability or obligation assumed or indemnity incurred (or agreed to be assumed or incurred) by any Acquired Company, in favour of Seller, Altor or any of their respective Affiliates, and (f) any Unpaid Transaction Expenses (including for the avoidance doubt director’s fees paid to Anders Ullberg and Martin Ivert as a result of them resigning at Closing), in each case paid after the close of business on the Locked-Box Date and on or prior to the close of business on the Closing Date, but does not include any Permitted Leakage and, for the purposes of this definition, reference to Seller, Altor or any employee, director, consultant, officer or non-executive director of any Acquired Company shall include any nominee, trustee or agent or any other person receiving monies or any benefit on behalf of any such person or on whose behalf any obligation, or liability is assumed or indemnity is incurred.

“Locked-Box Date” means February 29, 2016.

“Permitted Leakage” means (i) any payments expressly provided for under the terms of this Agreement, (ii) any directors’ fees (including expenses) and/or consultancy fees payable or paid to any employee, director, consultant, an officer or non-executive director of any Acquired Company in the ordinary course of business pursuant to their current employment, directors and/or consulting agreements with any Acquired Company, (iii) except for payments set forth in (d) of the definition of Leakage, the salaries and other remuneration (including expenses) and bonuses, emoluments and other entitlements which are consistent with historical practice and are payable or paid to any employee, director, consultant, officer or non-executive director of any Acquired Company in the ordinary course of business in accordance with their current employment agreements with any Acquired Company, (iv) notwithstanding items (d) and (f) of the definition of “Leakage” and item (iii) of this definition, any payments of Unpaid Transaction Expenses (including any Transaction Bonuses) that has been deducted from the Bank Pay-Off Amount pursuant to Clause 4.2.3(c), or (v) any payment made or liability, cost or expense incurred in connection with any matter undertaken at the written request of, or with the prior written consent of, Buyers, and provided any Buyer has agreed in such written request or consent that the undertaking is a Permitted Leakage.

Promptly following the Closing, Seller and Altor shall, jointly and severally at their own expense, take all actions reasonably necessary to clear, remove, and satisfy the Encumbrances listed on Schedule 2.1(j), subject to Ampco, its Affiliates and the Acquired Companies providing, at Seller’s and Altor’s expense, any assistance reasonably requested by Seller and/or Altor in relation thereto and taking into account that neither Seller nor Altor will be able to exercise any control over the Acquired Companies after Closing.

In the event that Closing occurs on or before March 11, 2016, the following provision shall be added to Clause 13.2 of the Agreement:

13.2.1.5 Any claim by a Buyer under Clause 6.9.2 for any Leakage from, but excluding, the Locked-Box Date to, and including, the Closing Date, may be made until three (3) years after the Closing Date or, in the event that Altor Fund II is extended, the last Business Day of such extension.

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The Addendum has been executed in four copies, of which each Party has taken one.

Place:

Date:

Place:

Date:

ALTOR FUND II GP LIMITED as general partner of Altor Fund II (No. 1) Limited Partnership, Altor Fund II (No. 2) Limited Partnership, Altor Fund II (No. 3) Limited Partnership and as investment manager to Altor Fund II (No. 4) Limited