Notice of Shareholders’ Meeting of merged Ahlstrom Corporation

AHLSTROM-MUNKSJÖ OYJ, STOCK EXCHANGE RELEASE April 26, 2017 at 08:45 a.m. Following the merger of Ahlstrom Corporation (the “Company” or “Ahlstrom”) into Ahlstrom-Munksjö Oyj (formerly Munksjö Oyj, “Ahlstrom-Munksjö”) on April 1, 2017, a notice is given to the shareholders of the Company to a Shareholders’ Meeting to be held on June 6, 2017 at 1:00 p.m. in the Veranda 3 of the Finlandia Hall, Mannerheimintie 13e, Helsinki, Finland (entrance M4 from Mannerheimintie and K4 from the Karamzininranta -street). The reception of persons who have registered for the meeting and the distribution of voting tickets will commence at 12:00 a.m. Registration for the meeting is requested to be made no later than 12:45 p.m. A. Matters on the agenda of the Shareholders’ Meeting At the Shareholders’ Meeting the following matters will be considered: 1. Opening of the meeting 1. Calling the meeting to order 1. Election of persons to scrutinize the minutes and to supervise the counting of votes 1. Recording the legality of the meeting 1. Recording the attendance at the meeting and adoption of the list of votes 1. Presentation of the Financial Statements and the Report of Operations for the year 2016 as well as for the period January 1 – March 31, 2017 (Final Accounts) and the related Auditor’s Reports 1. Adoption of the Financial Statements for the year 2016 as well the Ahlstrom Final Accounts as for the period January 1 – March 31, 2017 1. Resolution on the discharge of the members of the Board of Directors and President & CEO from liability 1. Closing of the meeting B. Documents of the Shareholders’ Meeting This notice as well as the Financial Statements and the Report of Operations for the year 2016 as well as for the period January 1 – March 31, 2017 (Final Accounts) and the related Auditor’s Reports are available on Ahlstrom-Munksjö’s website at as from May 16, 2017, at the latest. The above-mentioned documents will also be available at the Shareholders’ Meeting. The minutes of the meeting will be available on the above-mentioned website as from June 20, 2017. C. Instructions for participants in the Shareholders’ Meeting 1. The right to participate and registration The Company’s last shareholders, i.e. shareholders listed in the Company’s register of shareholders maintained by Euroclear Finland Oy as at the end of the last trading day on March 31, 2017 (i.e. such shareholders who were entitled to receive merger consideration), have the right to participate in the Shareholders’ Meeting. A shareholder, whose shares are registered on his/her personal Finnish book-entry account, is registered in the shareholders’ register of the Company. A shareholder who wishes to participate in the Shareholders’ Meeting shall register for the meeting by giving prior notice of participation on June 1, 2017 at 4:00 p.m. at the latest. Such notice can be given: ·  on the Ahlstrom-Munksjö’s website ·  by email to ·  by mail to Ahlstrom-Munksjö, Shareholders Meeting, P.O.Box 329, 00101 Helsinki, Finland ·  by telefax to +358 (0)10 888 5813 ·  by phone during office hours to +358 (0)10 888 4726 In connection with the registration, a shareholder shall state his/her name, personal identification number, address, telephone number and the name of a possible assistant or proxy representative and the personal identification number of such proxy representative. The personal data given to Ahlstrom-Munksjö is used only in connection with the Shareholders’ Meeting and with the processing of related registrations. 2. Holders of nominee registered shares A holder of nominee registered shares who is entitled to be entered in the Company’s shareholders’ register on March 31, 2017 (at the end of the last trading day) and who wish to attend the Shareholders’ Meeting, may in accordance with the instructions from his/her custodian banks, request to be temporarily entered into the shareholders’ register of the Company in order to participate in the Shareholders’ Meeting, at the latest on June 1, 2017 at 10:00 a.m. A holder of nominee registered shares is considered to have registered for the Shareholders’ Meeting if he/she has been temporarily recorded in the shareholders’ register as described above. 3. Proxy representative and powers of attorney A shareholder may participate in the Shareholders’ Meeting and exercise his/her rights at the meeting also by way of proxy representation. A proxy representative shall produce a dated proxy document or otherwise in a reliable manner demonstrate his/her right to represent the shareholder at the Shareholders’ Meeting. When a shareholder participates in the Shareholders’ Meeting by means of several proxy representatives representing the shareholder with shares at different book-entry accounts, the shares by which each proxy representative represents the shareholder shall be identified in connection with the registration for the Shareholders’ Meeting. Possible proxy documents should be delivered to the address above before the last date of registration. A template for a proxy is available at the Company's website mentioned above. 4. Other instructions and information Pursuant to chapter 5, section 25 of the Company's Act, a shareholder who is present at the Shareholders’ Meeting has the right to request information with respect to the matters to be considered at the meeting. At the time of the completion of the merger on April 1, 2017 the total number of shares in the Company was 46,670,608 and said shares had 46,670,608 votes in total. Helsinki, April 26, 2017 AHLSTROM CORPORATION Board of Directors For further information, please contact:

Juho Erkheikki, Investor and Media Relations Manager, tel. +358 50 413 45 83,

Ahlstrom-Munksjö in brief Ahlstrom-Munksjö is a global leader in fiber-based materials, supplying innovative and sustainable solutions to customers worldwide. Our offerings include decor paper, filter media, release liners, abrasive backings, nonwovens, electrotechnical paper, glass fiber materials, food packaging and labeling, tape, medical fiber materials and solutions for diagnostics. Combined annual net sales are about EUR 2.15 billion and we employ 6,200 people. The Ahlstrom-Munksjö share is listed on the Nasdaq Helsinki and Stockholm. The company was formed on April 1, 2017 through the merger of Ahlstrom Corporation and Munksjö Oyj. Read more at