THE FOURTH SUPPLEMENT DOCUMENT TO NORTH HOLDINGS 3 OY'S TENDER OFFER DOCUMENT DATED NOVEMBER 24, 2022, RELATING TO THE VOLUNTARY PUBLIC TENDER OFFER FOR ALL ISSUED AND OUTSTANDING SHARES IN CAVERION CORPORATION

February 28, 2023

THE TENDER OFFER IS NOT BEING MADE DIRECTLY OR INDIRECTLY IN ANY JURISDICTION WHERE PROHIBITED BY APPLICABLE LAW AND THE TENDER OFFER DOCUMENT, RELATED ACCEPTANCE FORMS AND SUPPLEMENT DOCUMENTS ARE NOT AND MAY NOT BE DISTRIBUTED, FORWARDED OR TRANSMITTED INTO OR FROM ANY JURISDICTION WHERE PROHIBITED BY APPLICABLE LAW BY ANY MEANS WHATSOEVER INCLUDING, WITHOUT LIMITATION, MAIL, FACSIMILE TRANSMISSION, E-MAIL OR TELEPHONE. IN PARTICULAR, THE TENDER OFFER IS NOT MADE IN AND THE TENDER OFFER DOCUMENT AND THIS SUPPLEMENT DOCUMENT MUST UNDER NO CIRCUMSTANCES BE DISTRIBUTED INTO AUSTRALIA, CANADA, THE HONG KONG SPECIAL ADMINISTRATIVE REGION OF THE PEOPLE'S REPUBLIC OF CHINA ("HONG KONG"), JAPAN, NEW ZEALAND OR SOUTH AFRICA OR ANY OTHER JURISDICTION WHERE PROHIBITED BY APPLICABLE LAW. SHAREHOLDERS IN THE UNITED STATES SHOULD ALSO REFER TO THE SECTION TITLED "INFORMATION FOR SHAREHOLDERS IN THE UNITED STATES" BELOW.

North Holdings 3 Oy (the "Offeror") and Caverion Corporation (the "Company" or "Caverion") have on November 3, 2022 entered into a combination agreement, which was amended on January 24, 2023 (as amended, the "Combination Agreement"), pursuant to which the Offeror has made a recommended voluntary public tender offer to acquire all of the issued and outstanding shares in Caverion that are not held by Caverion or any of its subsidiaries (the "Shares" or, individually, a "Share") (the "Tender Offer"). The Offeror has on November 24, 2022 published a tender offer document, dated November 24, 2022, and published the first supplement document to the tender offer document on January 13, 2023, the second supplement to the tender offer document on February 10, 2023 and the third supplement document to the tender offer document on February 15, 2023, concerning the Tender Offer (the tender offer document, as supplemented from time to time, the "Tender Offer Document"). The offer period for the Tender Offer commenced on November 24, 2022, at 9:30 a.m. (Finnish time).

North (BC) Lux Holdco SARL (a vehicle owned and controlled by funds managed or advised by Bain Capital Private Equity (Europe), LLP, and/or its affiliates), Security Trading Oy, Fennogens Investments S.A. and Corbis S.A. form a consortium for the purposes of the Tender Offer.

Supplements to the Tender Offer Document

Crayfish BidCo Oy announced on February 24, 2023, that it has resolved to increase the offer price under its competing offer. As a result, Caverion has published a stock exchange release on February 24, 2023, concerning Crayfish BidCo Oy's amended offer, and the Offeror has published a stock exchange release on February 24, 2023, in which the Offeror announced that it is evaluating the amended offer by Crayfish BidCo Oy and its alternatives. In addition, Caverion has published a stock exchange release on February 27, 2023, according to which the Board of Directors of Caverion is in the process of evaluating both offers and Caverion Board expects to present its view on the two tender offers, including a potential change in recommendation, latest on March 9, 2023. The Offeror therefore supplements the Tender Offer Document in accordance with Chapter 11, Section 11, Subsection 4 of the Finnish Securities Markets Act (746/2012, as amended) with the following information included in this document (the "Supplement Document"), and by adding Caverion's stock exchange release concerning Crayfish Bidco Oy's offer of February 24, 2023, as Appendix K to the Tender Offer Document, the Offeror's stock exchange release of February 24, 2023, as Appendix L to the Tender Offer Document and Caverion's stock exchange release concerning evaluation of the offers of February 27, 2023, as Appendix M to the Tender Offer Document. In connection with this Supplement Document, the Offeror extends the offer period of the Tender Offer to expire on March 16, 2023. The Offeror simultaneously continues to evaluate the amended offer by Crayfish BidCo Oy and its alternatives and will announce the conclusions of its evaluation in due course.

Caverion's stock exchange release

Caverion announced on January 10, 2023, that Crayfish Bidco Oy, a Finnish company controlled by Triton Fund V, has announced a voluntary public cash tender offer pursuant to which Crayfish Bidco Oy proposes to acquire all issued and outstanding shares in Caverion (the "Crayfish Offer"). Caverion announced on February 24, 2023, that Crayfish BidCo Oy has announced that it has resolved to increase the offer price under the Crayfish Offer to EUR 8.95 in cash for each validly tendered Share. According to the release Crayfish BidCo Oy has also agreed on purchases of Shares, conditional on obtaining necessary regulatory approvals for such additional purchases, which would, once completed, increase Crayfish BidCo Oy's shareholding in Caverion to approximately 13.8 percent of all outstanding shares (excluding treasury shares). Consequently, the Offeror amends the following sections of the Tender Offer Document as follows:

The section "Information on the Pricing of the Tender Offer – Other Public Tender Offers Regarding the Shares" shall be amended by adding the passages that are underlined and set in bold:

"To the knowledge of the Offeror, no public tender offer for the Shares or securities entitling to Shares has been made by any third party during the 12 months preceding the date of the Tender Offer Document dated November 24, 2022. Caverion announced on January 10, 2023, that Crayfish Bidco Oy, a Finnish company controlled by Triton Fund V, has announced a voluntary public cash tender offer pursuant to which Crayfish Bidco Oy proposes to acquire all issued and outstanding shares in Caverion at an offer price of EUR 8.00 per share. According to Caverion's stock exchange release, the tender offer by Crayfish Bidco Oy is subject to certain conditions, including the tender offer having been validly accepted with respect to shares representing, together with any other shares otherwise acquired by Crayfish Bidco Oy prior to or during the offer period, more than ninety (90) percent of the outstanding shares and voting rights in Caverion, and the receipt by Crayfish Bidco Oy of all necessary regulatory approvals. Caverion's stock exchange release of January 10, 2023 is attached as Appendix D to the Tender Offer Document and the Offeror's stock exchange release concerning, inter alia, its views on the competing offer of January 11, 2023, is attached as Appendix E to the Tender Offer Document. Caverion announced on February 24, 2023, that Crayfish BidCo Oy has announced that it has resolved to increase the offer price under the tender offer by Crayfish BidCo Oy to EUR 8.95 in cash for each validly tendered Share. Caverion's stock exchange release of February 24, 2023, is attached as as Appendix K to the Tender Offer Document, the Offeror's stock exchange release of February 24, 2023, concerning its evaluation of alternatives is attached as Appendix L to the Tender Offer Document and Caverion's stock exchange release of February 27, 2023, concerning evaluation of the Caverion Board is attached as Appendix M to the Tender Offer Document."

Supplements relating to the extension of the Offer Period

As described in the Tender Offer Document, all regulatory approvals required for the completion of the Tender Offer have been received and the Tender Offer was expected to be completed during the first quarter of 2023. The offer period for the Tender Offer was intended to end on February 28, 2023. However, as a result of the new information included in this Supplement Document, the Offeror extends the offer period of the Tender Offer to expire on March 16, 2023, at 4:00 p.m. (Finnish time), unless the offer period is extended further or any extended offer period is discontinued in accordance with the terms and conditions of the Tender Offer. Consequently, the Offeror amends the following sections of the Tender Offer Document as follows:

The sixth paragraph of the cover page shall be amended by replacing the following strikethrough passage with the passage that is underlined and set in bold:

"The offer period for the Tender Offer has commenced on November 24, 2022 at 9:30 a.m. (Finnish time) and will expire on February 28 March 16, 2023 at 4:00 p.m. (Finnish time), unless the offer period is extended or any extended offer period is discontinued (the "Offer Period"). For details, please see "Terms and Conditions of the Tender Offer"."

The first paragraph of the section "Summary relating to the Alternative Consideration – Key Information on the Offer of Alternative Consideration to the Public – Under Which Conditions and Timetable Can I Invest in the Alternative Consideration?" shall be amended by replacing the following strikethrough passage with the passage that is underlined and set in bold:

"The offer period for the Tender Offer commenced on November 24, 2022 at 9:30 a.m. (Finnish time) and expires on February 28 March 16, 2023 at 4:00 p.m. (Finnish time), unless the offer period is extended or any extended offer period is discontinued (the "Offer Period"). Acceptance of the Tender Offer with Alternative Consideration may only be submitted on the business day following the publication of the Supplement Document, i.e. from February 13, 2023."

The first paragraph of the section "Restrictions and Important Information – Certain Key Dates" shall be amended by replacing the following strikethrough passages with the passages that are underlined and set in bold:

"The following timetable sets forth certain key dates relating to the Tender Offer, provided that the Offer Period has not been extended further or discontinued in accordance with, and subject to, the terms and conditions of the Tender Offer and applicable laws and regulations:

Announcement of the Tender Offer	November 3, 2022
Offer Period commences	November 24, 2022
Announcement of the Offeror's decision to improve the consideration of the Tender Offer and other amendments made to the Combination Agreement and the terms and conditions of the Tender Offer	January 24, 2023
Offer Period expires at the earliest, unless extended or discontinued in accordance with, and subject to, the terms and conditions of the Tender Offer and applicable laws and regulations; any possible extension of the Offer Period will be announced by way of a stock exchange release as soon as practically possible	February 28March 16, 2023
Announcement of the preliminary result of the Tender Offer (preliminary)	March 1March 17, 2023
Announcement of the final result of the Tender Offer (preliminary)	March 6March 22, 2023
Payment of the Offer Price and issuance of the Alternative Consideration Instruments and recording of the non-transferable entries representing the Deferred Payment Rights to the equity savings accounts (preliminary)	By March 27April 14, 2023"

The second paragraph of the section "Restrictions and Important Information – Certain Key Dates" shall be amended by adding the passages that are underlined and set in bold:

"All regulatory approvals required for the completion of the Tender Offer have been received and the Tender Offer is currently expected to be completed during the first second quarter of 2023. The Offeror will announce, by way of stock exchange releases, any possible extension of the Offer Period as soon as practically possible as well as any other information required to be announced in accordance with applicable laws and regulations. As announced on February 24, 2023, the Offeror is evaluating the amended competing offer by Crayfish BidCo Oy and its alternatives and will announce its conclusions in due course, and may therefore extend the offer period further, if needed. In accordance with the terms and conditions of the Tender Offer, the Offeror reserves the right, as stipulated in Chapter 11, Section 17 of the Finnish Securities Markets Act, to (i) decide upon an extension of the Offer Period; (ii) decide upon an amendment of the terms and conditions of the Tender Offer; and (iii) decide, during the Offer Period, but before the expiration of the competing offer, to let the Tender Offer lapse."

The first paragraph of the section "Terms and Conditions of the Tender Offer – Offer Period" shall be amended by replacing the following strikethrough passage with the passage that is underlined and set in bold:

"The offer period for the Tender Offer commenced on November 24, 2022, at 9:30 a.m. (Finnish time) and expires on February 28 March 16, 2023, at 4:00 p.m. (Finnish time), unless the offer period is extended or any extended offer period is discontinued as described below (the "Offer Period"). Before February 13, 2023, the acceptance of the Tender Offer can only be made with the Cash Offer Price."

The third paragraph of the section "Terms and Conditions of the Tender Offer – Offer Period" shall be amended by replacing the following strikethrough passage with the passage that is underlined and set in bold:

"According to Chapter 11, Section 12 of the Finnish Securities Markets Act, the duration of the Offer Period in its entirety may be ten (10) weeks at the maximum. Provided that the business operations of the Company are not hindered for longer than is reasonable, as referred to in Chapter 11, Section 12, Subsection 2 of the Finnish Securities Markets Act, the Offeror may extend the Offer Period beyond ten (10) weeks for a particular reason. The Offeror has extended the Offer Period until February 28 March 16, 2023 and reserves the right to extend the Offer Period in accordance with the applicable laws and regulations, taking into account the regulations and guidelines 9/2013 of the Finnish Financial Supervisory Authority (the "FIN-FSA") on Takeover Bids and Mandatory Bids (as may be amended or re-enacted from time to time) (the "FIN-FSA Regulations and Guidelines"). The expiry date of any extended Offer Period will in such case, unless published in connection with the announcement of the extension of the Offer Period, be published by the Offeror at least two (2) weeks before such expiry."

Availability of Documents

The Finnish language version of the Tender Offer Document is available, and the Finnish language version of this Supplement Document is available as of February 28, 2023, on the internet at www.caverion-offer.fi and www.nordea.fi/caverion-ostotarjous. The English language translation of the Tender Offer Document is available, and the English language translation of this Supplement Document is available as of February 28, 2023, on the internet at www.caverion-offer.com and www.nordea.fi/caverion-offer.

The Finnish Financial Supervisory Authority (the "FIN-FSA") has approved the Finnish language version of this Supplement Document but the FIN-FSA assumes no responsibility for the accuracy of the information presented therein. The decision number of the approval of the FIN-FSA is FIVA/2023/377. This Supplement Document has been translated into the English language. In the event of any discrepancy between the two language versions of the Supplement Document, the Finnish language version shall prevail.

The Tender Offer is not being made, directly or indirectly, in or into Australia, Canada, Hong Kong, Japan, New Zealand or South Africa and the Tender Offer Document and this Supplement Document and any and all materials related thereto should not be sent in or into Australia, Canada, Hong Kong, Japan, New Zealand or South Africa (including by use of, or by any means or instrumentality, for example, e-mail, post, facsimile transmission, telephone or internet, of interstate or foreign commerce, or any facilities of a national securities exchange), and the Tender Offer cannot be accepted directly or indirectly or by any such use, means or instrumentality, in or from within Australia, Canada, Hong Kong, Japan, New Zealand or South Africa. Accordingly, copies of the Tender Offer Document and this Supplement Document and any related materials are not being, and must not be, mailed, forwarded, transmitted or otherwise distributed or sent in or into or from Australia, Canada, Hong Kong, Japan, New Zealand or South Africa or, in their capacities as such, to custodians, trustees, agents or nominees holding Shares for Australian, Canadian, Hong Kong, Japanese, New Zealander or South African persons, and persons receiving any such documents (including custodians, nominees and trustees) must not distribute, forward, mail, transmit or send them in, into or from Australia, Canada, Hong Kong, Japan, New Zealand or South Africa. Any person accepting the Tender Offer shall be deemed to represent to the Offeror such person's compliance with these restrictions and any purported acceptance of the Tender Offer that is a direct or indirect consequence of a breach or violation of these restrictions shall be null and void.

Information for Shareholders in the United States

Shareholders of Caverion in the United States are advised that the shares in Caverion are not listed on a U.S. securities exchange and that Caverion is not subject to the periodic reporting requirements of the U.S. Securities Exchange Act of 1934, as amended (the "Exchange Act"), and is not required to, and does not, file any reports with the U.S. Securities and Exchange Commission (the "SEC") thereunder.

The Tender Offer is made for the issued and outstanding shares of Caverion, which is domiciled in Finland, and is subject to Finnish disclosure and procedural requirements. The Tender Offer is made in the United States pursuant to Section 14(e) and Regulation 14E under the Exchange Act, subject to the exemption provided under Rule 14d-1(c) under the Exchange Act for a Tier I tender offer (the "Tier I Exemption") and Rule 802 (the "802 Exemption") under the U.S. Securities Act of 1933 (the "U.S. Securities Act"), and otherwise in accordance with the disclosure and procedural requirements of Finnish law, including with respect to the Tender Offer timetable, settlement procedures, withdrawal, waiver of conditions and timing of payments, which are different from those of the United States. In particular, the financial information included in the Tender Offer Document and this Supplement Document has been prepared in accordance with applicable accounting standards in Finland, which may not be comparable to the financial statements or financial information of U.S. companies. The Tender Offer is made to Caverion's shareholders resident in the United States on the same terms and conditions as those made to all other shareholders of Caverion to whom an offer is made. Any informational documents, including the Tender Offer Document and this Supplement Document, are being disseminated to U.S. shareholders on a basis comparable to the method that such documents are provided to Caverion's other shareholders.

As permitted under the Tier I Exemption, the settlement of the Tender Offer is based on the applicable Finnish law provisions, which differ from the settlement procedures customary in the United States, particularly as regards to the time when payment of the consideration is rendered. The Tender Offer, which is subject to Finnish law, is being made to the U.S. shareholders in accordance with the applicable U.S. securities laws, and applicable exemptions thereunder, in particular the Tier I Exemption and the 802 Exemption. To the extent the Tender Offer is subject to U.S. securities laws, those laws only apply to U.S. shareholders and will not give rise to claims on the part of any other person. U.S. shareholders should consider that (whether paid initially in cash or upon redemption of any Alternative Consideration Instruments) the offer price for the Tender Offer is being paid in EUR and that no adjustment will be made based on any changes in the exchange rate.

To the extent permissible under applicable law or regulations, the Offeror and its affiliates or its brokers and its brokers' affiliates (acting as agents for the Offeror or its affiliates, as applicable) may from time to time after the date of the Tender Offer Document and this Supplement Document and during the pendency of the Tender Offer, and other than pursuant to the Tender Offer, directly or indirectly purchase or arrange to purchase Shares or any securities that are convertible into, exchangeable for or exercisable for Shares. These purchases may occur either in the open market at prevailing prices or in private transactions at negotiated prices. To the extent information about such purchases or arrangements to purchase is made public in Finland, such information will be disclosed by means of a press release or other means reasonably calculated to inform U.S. shareholders of Caverion of such information. In addition, the financial advisers to the Offeror may also engage in ordinary course trading activities in securities of Caverion, which may include purchases or arrangements to purchase such securities. To the extent required in Finland, any information about such purchases will be made public in Finland in the manner required by Finnish law.

Neither the SEC nor any U.S. state securities commission has approved or disapproved the Tender Offer (including the offer of the Alternative Consideration Instruments), passed upon the merits or fairness of the Tender Offer (including the offer of the Alternative Consideration Instruments), or passed any comment upon the adequacy, accuracy or completeness of the disclosure in relation to the Tender Offer (including in relation to the Alternative Consideration Instruments). Any representation to the contrary is a criminal offence in the United States.

THE ALTERNATIVE CONSIDERATION INSTRUMENTS HAVE NOT BEEN, AND WILL NOT BE, REGISTERED UNDER THE SECURITIES ACT OR THE SECURITIES LAWS OF ANY STATE OF THE UNITED STATES OR ANY OTHER JURISDICTION, AND THE ALTERNATIVE CONSIDERATION INSTRUMENTS CONSTITUTE "RESTRICTED SECURITIES" PURSUANT TO THE SECURITIES ACT, AND MAY NOT BE OFFERED OR SOLD WITH UNITED STATES OR TO, OR FOR, THE ACCOUNT OR BENEFIT OF, U.S. PERSONS (AS DEFINED IN REGULATION S UNDER THE SECURITIES ACT), EXCEPT PURSUANT TO AN EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT AND APPLICABLE STATE OR LOCAL SECURITIES LAWS.

The receipt of cash pursuant to the Tender Offer by a U.S. shareholder may be a taxable transaction for U.S. federal income tax purposes and under applicable U.S. state and local, as well as foreign and other, tax laws. Each holder of Shares is urged to consult its independent professional advisers immediately regarding the tax and other consequences of accepting the Tender Offer.

It may be difficult for Caverion's shareholders and the holders of the Alternative Consideration Instruments to enforce their rights and any claims they may have arising under the U.S. federal securities laws, since the Offeror and Caverion are located in a non-U.S. jurisdiction and some or all of their respective officers and directors may be residents of non-U.S. jurisdictions. Caverion shareholders and the holders of the Alternative Consideration Instruments may not be able to sue the Offeror or Caverion or their respective officers or directors in a non-U.S. court for violations of the U.S. federal securities laws. It may be difficult to compel the Offeror and Caverion and their respective affiliates to subject themselves to a U.S. court's judgment.

NEITHER THE U.S. SECURITIES AND EXCHANGE COMMISSION NOR ANY U.S. STATE SECURITIES COMMISSION HAS APPROVED OR DISAPPROVED THE TENDER OFFER, PASSED ANY COMMENTS UPON THE MERITS OR FAIRNESS OF THE TENDER OFFER, PASSED ANY COMMENT UPON THE ADEQUACY OR COMPLETENESS OF THE TENDER OFFER DOCUMENT OR THIS SUPPLEMENT DOCUMENT OR PASSED ANY COMMENT ON WHETHER THE CONTENT IN THE TENDER OFFER DOCUMENT OR IN THIS SUPPLEMENT DOCUMENT IS CORRECT OR COMPLETE. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENCE IN THE UNITED STATES.

Forward-looking Statements

This Supplement Document includes "forward-looking statements", including statements about the expected timing and completion of the Tender Offer. Generally, words such as may, should, could, aim, will, would, expect, intend, estimate, anticipate, believe, plan, seek, contemplate, envisage, continue or similar expressions identify forward-looking statements.

These statements are subject to risks, uncertainties, assumptions and other important factors, many of which may be beyond the control of the Offeror and could cause actual results to differ materially from those expressed or implied in these forward-looking statements.

Factors that could cause actual results to differ from such statements include: the occurrence of any event, change or other circumstances that could give rise to the termination of the Tender Offer, the failure to receive, on a timely basis or otherwise, the required approvals by government or regulatory agencies, the risk that a condition to consummating the Tender Offer may not be satisfied, the ability of Caverion to retain and hire key personnel and maintain relationships with customers, suppliers and other business partners pending the completion of the Tender Offer, and other factors.

Although the Offeror believes that the expectations reflected in such forward-looking statements are based on reasonable assumptions, no assurance can be given that such statements will be fulfilled or prove to be correct, and no representations are made as to the future accuracy and completeness of such statements. The Offeror undertakes no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by applicable laws or by any appropriate regulatory authority. Any forward-looking statements contained in this Supplement Document speak only as at the date of this Supplement Document.

APPENDIX K - CAVERION'S STOCK EXCHANGE RELEASE OF FEBRUARY 24, 2023

Crayfish Bidco Oy improves its tender offer for Caverion Corporation and has entered into conditional agreements to increase its shareholding in Caverion Corporation to 13.8 percent

Caverion Corporation Tender Offer 24 February 2023 at 11.00 a.m. EET

Crayfish Bidco Oy improves its tender offer for Caverion Corporation and has entered into conditional agreements to increase its shareholding in Caverion Corporation to 13.8 percent

NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION, IN WHOLE OR IN PART, DIRECTLY OR INDIRECTLY,IN OR INTO AUSTRALIA, CANADA, HONG KONG, JAPAN, NEW ZEALAND OR SOUTH AFRICA OR IN ANY OTHER JURISDICTION IN WHICH THE TENDER OFFER WOULD BE PROHIBITED BY APPLICABLE LAW.

Crayfish Bidco Oy improves its tender offer for Caverion Corporation and has entered into conditional agreements to increase its shareholding in Caverion Corporation to 13.8 percent

On January 10, 2023, Crayfish BidCo Oy ("Crayfish BidCo"), a Finnish private limited liability company indirectly controlled by the entities comprising Triton Fund V (together "Triton"), announced a competing voluntary public cash tender offer for all the issued and outstanding shares in Caverion Corporation ("Caverion" or the "Company") that are not held by Caverion or any of its subsidiaries (the "Shares" or, individually, a "Share") (the "Crayfish Tender Offer"). Crayfish BidCo has today announced that it has resolved to increase the offer price under the Tender Offer to EUR 8.95 in cash for each validly tendered Share. Moreover, the Offeror has agreed on purchases of further Shares, conditional on obtaining necessary regulatory approvals for such additional purchases, and continues to negotiate with certain additional shareholders concerning the potential purchase of their Shares. The conditional share purchases already concluded would, once completed, increase Crayfish BidCo's shareholding in Caverion to approximately 13.8 percent of all outstanding shares (excluding treasury shares). Triton expects to publish a tender offer document with detailed information on the Crayfish Tender Offer on or about 6 March 2023 and expects the offer period to commence on or about 7 March 2023 and to initially expire on or about 16 May 2023. The announcement by Crayfish Bidco has been attached in its entirety to this stock exchange release.

The Board of Directors will carefully consider the enhanced Crayfish Tender Offer from the point of view of Caverion and all its shareholders and expects to supplement its statement regarding the tender offer announced by North Holdings 3 Oy on November 3, 2022 (as enhanced on January 24, 2023) as well as publish a statement regarding the Crayfish Tender Offer in due course. The tender offer announced by North Holdings 3 Oy continues to be valid in accordance with its terms as set out in the tender offer document, dated November 24, 2022 (and as supplemented).

ABOUT CAVERION

Caverion is a public limited liability company incorporated under the laws of Finland with its shares listed on the official list of Nasdaq Helsinki. Caverion is a Northern & Central European-based expert for smart and sustainable built environments, enabling performance and people's well-being. Caverion offers expert guidance during the entire life cycle of buildings, infrastructure or industrial sites and processes: from design & build to projects, technical and industrial maintenance, facility management as well as

advisory services. At the end of December 2022, there were almost 14,500 professionals serving customers at the service of Caverion Group in 10 countries.

IMPORTANT INFORMATION

THIS RELEASE MAY NOT BE RELEASED OR OTHERWISE DISTRIBUTED, IN WHOLE OR IN PART, DIRECTLY OR INDIRECTLY, IN OR INTO, AUSTRALIA, CANADA, HONG KONG, JAPAN, NEW ZEALAND OR SOUTH AFRICA OR IN ANY OTHER JURISDICTION IN WHICH THE TENDER OFFER WOULD BE PROHIBITED BY APPLICABLE LAW.

THIS RELEASE IS NOT A TENDER OFFER DOCUMENT AND AS SUCH DOES NOT CONSTITUTE AN OFFER OR INVITATION TO MAKE A SALES OFFER. IN PARTICULAR, THIS RELEASE IS NOT AN OFFER TO SELL OR THE SOLICITATION OF AN OFFER TO BUY ANY SECURITIES DESCRIBED HEREIN, AND IS NOT AN EXTENSION OF THE TENDER OFFER, IN, AUSTRALIA, CANADA, HONG KONG, JAPAN, NEW ZEALAND OR SOUTH AFRICA. INVESTORS SHALL ACCEPT THE TENDER OFFER FOR THE SHARES ONLY ON THE BASIS OF THE INFORMATION PROVIDED IN A TENDER OFFER DOCUMENT. OFFERS WILL NOT BE MADE DIRECTLY OR INDIRECTLY IN ANY JURISDICTION WHERE EITHER AN OFFER OR PARTICIPATION THEREIN IS PROHIBITED BY APPLICABLE LAW OR WHERE ANY TENDER OFFER DOCUMENT OR REGISTRATION OR OTHER REQUIREMENTS WOULD APPLY IN ADDITION TO THOSE UNDERTAKEN IN FINLAND.

THE TENDER OFFER IS NOT BEING MADE DIRECTLY OR INDIRECTLY IN ANY JURISDICTION WHERE PROHIBITED BY APPLICABLE LAW AND, WHEN PUBLISHED, THE TENDER OFFER DOCUMENT AND RELATED ACCEPTANCE FORMS WILL NOT AND MAY NOT BE DISTRIBUTED, FORWARDED OR TRANSMITTED INTO OR FROM ANY JURISDICTION WHERE PROHIBITED BY APPLICABLE LAWS OR REGULATIONS. IN PARTICULAR, THE TENDER OFFER IS NOT BEING MADE, DIRECTLY OR INDIRECTLY,IN OR INTO, OR BY USE OF THE POSTAL SERVICE OF, OR BY ANY MEANS OR INSTRUMENTALITY (INCLUDING, WITHOUT LIMITATION, FACSIMILE TRANSMISSION, TELEX, TELEPHONE OR THE INTERNET) OF INTERSTATE OR FOREIGN COMMERCE OF, OR ANY FACILITIES OF A NATIONAL SECURITIES EXCHANGE OF, AUSTRALIA, CANADA, HONG KONG, JAPAN, NEW ZEALAND OR SOUTH AFRICA. THE TENDER OFFER CANNOT BE ACCEPTED, DIRECTLY OR INDIRECTLY, BY ANY SUCH USE, MEANS OR INSTRUMENTALITY OR FROM WITHIN, AUSTRALIA, CANADA, HONG KONG, JAPAN, NEW ZEALAND OR SOUTH AFRICA AND ANY PURPORTED ACCEPTANCE OF THE TENDER OFFER RESULTING DIRECTLY OR INDIRECTLY FROM A VIOLATION OF THESE RESTRICTIONS WILL BE INVALID.

THIS STOCK EXCHANGE RELEASE HAS BEEN PREPARED IN COMPLIANCE WITH FINNISH LAW, THE RULES OF NASDAQ HELSINKI AND THE HELSINKI TAKEOVER CODE AND THE INFORMATION DISCLOSED MAY NOT BE THE SAME AS THAT WHICH WOULD HAVE BEEN DISCLOSED IF THIS ANNOUNCEMENT HAD BEEN PREPARED IN ACCORDANCE WITH THE LAWS OF JURISDICTIONS OUTSIDE OF FINLAND.

Information for shareholders of Caverion in the United States

Shareholders of Caverion in the United States are advised that the Shares are not listed on a U.S. securities exchange and that Caverion is not subject to the periodic reporting requirements of the U.S. Securities Exchange Act of 1934, as amended (the "Exchange Act"), and is not required to, and does not, file any reports with the U.S. Securities and Exchange Commission (the "SEC") thereunder.

The Tender Offer will be made for the issued and outstanding shares of Caverion, which is domiciled in Finland, and is subject to Finnish disclosure and procedural requirements. The Tender Offer is made in the United States pursuant to Section 14(e) and Regulation 14E under the Exchange Act, subject to the exemption provided under Rule 14d-1(d) under the Exchange Act, and otherwise in accordance with the disclosure and procedural requirements of Finnish law, including with respect to the Tender Offer timetable, settlement procedures, withdrawal, waiver of conditions and timing of payments, which are different from those of the United States. In particular, the financial information included in this announcement has been prepared in accordance with applicable accounting standards in Finland, which may not be comparable to the financial statements or financial information of U.S. companies. The Tender Offer is made to Caverion's shareholders resident in the United States on the same terms and conditions as those made to all other shareholders of Caverion to whom an offer is made. Any informational documents, including this announcement, are being disseminated to U.S. shareholders on a basis comparable to the method that such documents are provided to Caverion's other shareholders.

Neither the SEC nor any U.S. state securities commission has approved or disapproved the Tender Offer, passed upon the merits or fairness of the Tender Offer, or passed any comment upon the adequacy, accuracy or completeness of the disclosure in relation to the Tender Offer. Any representation

to the contrary is a criminal offence in the United States.

The receipt of cash pursuant to the Tender Offer by a U.S. holder of Shares may be a taxable transaction for U.S. federal income tax purposes and under applicable U.S. state and local, as well as foreign and other, tax laws. Each holder of Shares is urged to consult its independent professional advisers immediately regarding the tax and other consequences of accepting the Tender Offer.

Tothe extent the Tender Offer is subject to U.S. securities laws, those laws only apply to U.S. holders of Shares and will not give rise to claims on the part of any other person. It may be difficult for Caverion's shareholders to enforce their rights and any claims they may have arising under the U.S. federal securities laws, since the Offeror and Caverion are located in non-U.S. jurisdictions and some or all of their respective officers and directors may be residents of non-U.S. jurisdictions. Caverion shareholders may not be able to sue the Offeror or Caverion or their respective officers or directors in a non -U.S. court for violations of the U.S. federal securities laws. It may be difficult to compel the Offeror and Caverion and their respective affiliates to subject themselves to a U.S. court's judgment.

Disclaimer

Bank of America Europe DAC, Stockholm branch, a subsidiary of Bank of America Corporation, is acting exclusively for Caverion and no one else in connection with the Tender Offer and the matters set out in this stock exchange release, and will not be responsible to anyone other than Caverion for providing the protections afforded to its clients or for providing advice in relation to the Tender Offer or any matter or arrangement referred to in this stock exchange release.

CAVERION CORPORATION

Distribution: Nasdaq Helsinki, key media, www.caverion.com

Appendix 1: Stock exchange release of Crayfish BidCo Oy

Investor and Media enquiries:

Milena Hæggström, Head of Investor Relations and External Communications, Caverion Corporation, tel. +358 40 5581 328, [email protected]

Caverion is an expert for smart and sustainable built environments, enabling performance and people's well-being. Customers can trust our expertise during the entire life cycle of their buildings, infrastructure or industrial sites and processes: from installation and maintenance of base and smart technologies, to managed services as well as advisory and engineering services and digital solutions. Our customers are supported by almost 14,500 Caverion professionals in 10 countries in Northern and Central Europe. Our revenue in 2022 was over EUR 2.3 billion. Caverion's shares are listed on Nasdaq Helsinki.

www.caverion.com @CaverionGroup

#BuildingPerformance #Energywise #Caverion

APPENDIX L - OFFEROR'S STOCK EXCHANGE RELEASE OF FEBRUARY 24, 2023

North Holdings 3 Oy evaluates Crayfish BidCo Oy's amended offer for Caverion Corporation

NORTH HOLDINGS 3 OY STOCK EXCHANGE RELEASE February 24, 2023 at 10.50 EET

NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION, IN WHOLE OR IN PART, DIRECTLY OR INDIRECTLY, IN OR INTO AUSTRALIA, CANADA, HONG KONG, JAPAN, NEW ZEALAND OR SOUTH AFRICA OR IN ANY OTHER JURISDICTION IN WHICH THE TENDER OFFER WOULD BE PROHIBITED BY APPLICABLE LAW.

North Holdings 3 Oy evaluates Crayfish BidCo Oy's amended offer for Caverion Corporation

As previously announced, North Holdings 3 Oy (the "Offeror") and Caverion Corporation (the "Company" or "Caverion") have entered into a combination agreement (as amended, the "Combination Agreement"), pursuant to which the Offeror has made a recommended voluntary public tender offer to acquire all of the issued and outstanding shares in Caverion that are not held by Caverion or any of its subsidiaries (the "Shares" or, individually, a "Share") (the "Tender Offer"). The Offeror is offering either: (i) a fixed cash payment of EUR 8.50 per Share payable in nine (9) months from the date of the first completion trades in the Tender Offer implemented through the issuance of a debt instrument with the nominal principal amount of EUR 8.50 for each Share tendered in the Tender Offer, or (ii) an immediate cash consideration of EUR 8.00 upon completion of the Tender Offer for each Share tendered in the Tender Offer. The offer period for the Tender Offer commenced on November 24, 2022, at 9:30 a.m. (Finnish time) and will expire on February 28, 2023, at 4:00 p.m. (Finnish time), unless the offer period is extended further or any extended offer period is discontinued as described in the terms and conditions of the Tender Offer.

The Offeror has noted the release published on February 24, 2023 by Crayfish BidCo Oy ("Crayfish"), a Finnish private limited liability company indirectly controlled by the entities comprising Triton Fund V, in which Crayfish announced that it will increase the offer price under its competing public tender offer for all the issued and outstanding shares in Caverion that was originally announced by Crayfish on January 10, 2023 (the "Crayfish Offer") to EUR 8.95 for each issued and outstanding share in Caverion. The Offeror is evaluating the amended Crayfish Offer and its alternatives and will announce its conclusions in due course. The Offeror will also supplement the tender offer document concerning its Tender Offer due to the amended Crayfish Offer and will simultaneously extend the offer period in its Tender Offer as required under applicable law and the regulations and guidelines of the Finnish Financial Supervisory Authority.

Investor and Media enquiries:

Bain Capital, Security Trading, Fennogens and Corbis Iris Nevanlinna, +358 40 577 9229, [email protected]

ABOUT THE CONSORTIUM

Bain Luxco is owned and controlled by the Bain Capital Funds. Bain Capital is one of the most experienced and successful private investment firms globally, having made more than 1,230 primary and add-on investments with approximately USD 160 billion assets under management. The firm has more than 620 investment professionals worldwide spread throughout its global network in Europe, Asia and North America. Bain Capital has made numerous successful and valueenhancing investments and exits in the Nordic region over the past years. Notably, the company led the successful takeprivate of Ahlstrom-Munksjö, a global leader in innovative and sustainable fiber-based materials, which was delisted from Nasdaq Helsinki in 2021. Further, from 2012 Bain Capital was the owner of Bravida, a leading Nordic technical installation and services provider, listing the business on Nasdaq Stockholm in 2015.

Security Trading is an investment company owned by the Antti Herlin family. As at the date of this announcement, Antti Herlin, Security Trading and Hisra Consulting and Finance Oy, which is a company fully owned by Security Trading, together hold approximately 15.43 percent of the Shares and votes in Caverion (excluding shares held in treasury by Caverion).

Fennogens is an investment company owned by the Georg Ehrnrooth, Henrik Ehrnrooth and Carl-Gustaf Ehrnrooth families. As at the date of this announcement, Fennogens holds approximately 10.38 percent of the Shares and votes in Caverion (excluding shares held in treasury by Caverion).

Corbis is an investment company owned by the Henrik Ehrnrooth family. As at the date of this announcement, Corbis holds approximately 1.27 percent of the Shares and votes in Caverion (excluding shares held in treasury by Caverion).

IMPORTANT INFORMATION

THIS STOCK EXCHANGE RELEASE MAY NOT BE RELEASED OR OTHERWISE DISTRIBUTED, IN WHOLE OR IN PART, DIRECTLY OR INDIRECTLY, IN OR INTO, AUSTRALIA, CANADA, HONG KONG, JAPAN, NEW ZEALAND OR SOUTH AFRICA OR IN ANY OTHER JURISDICTION IN WHICH THE TENDER OFFER WOULD BE PROHIBITED BY APPLICABLE LAW.

THIS STOCK EXCHANGE RELEASE IS NOT A TENDER OFFER DOCUMENT OR A SUPPLEMENT DOCUMENT TO TENDER OFFER DOCUMENT AND AS SUCH DOES NOT CONSTITUTE AN OFFER OR INVITATION TO MAKE A SALES OFFER. IN PARTICULAR, THIS STOCK EXCHANGE RELEASE IS NOT AN OFFER TO SELL OR THE SOLICITATION OF AN OFFER TO BUY ANY SECURITIES DESCRIBED HEREIN, AND IS NOT AN EXTENSION OF THE TENDER OFFER, IN, AUSTRALIA, CANADA, HONG KONG, JAPAN, NEW ZEALAND OR SOUTH AFRICA. INVESTORS SHALL ACCEPT THE TENDER OFFER FOR THE SHARES ONLY ON THE BASIS OF THE INFORMATION PROVIDED IN THE TENDER OFFER DOCUMENT AND THE POSSIBLE SUPPLEMENT DOCUMENTS TO THE TENDER OFFER DOCUMENT. OFFERS WILL NOT BE MADE DIRECTLY OR INDIRECTLY IN ANY JURISDICTION WHERE EITHER AN OFFER OR PARTICIPATION THEREIN IS PROHIBITED BY APPLICABLE LAW OR WHERE ANY TENDER OFFER DOCUMENT OR REGISTRATION OR OTHER REQUIREMENTS WOULD APPLY IN ADDITION TO THOSE UNDERTAKEN IN FINLAND.

THE TENDER OFFER IS NOT BEING MADE DIRECTLY OR INDIRECTLY IN ANY JURISDICTION WHERE PROHIBITED BY APPLICABLE LAW AND THE TENDER OFFER DOCUMENT, THE SUPPLEMENT DOCUMENT AND RELATED ACCEPTANCE FORMS WILL NOT AND MAY NOT BE DISTRIBUTED, FORWARDED OR TRANSMITTED INTO OR FROM ANY JURISDICTION WHERE PROHIBITED BY APPLICABLE LAWS OR REGULATIONS. IN PARTICULAR, THE TENDER OFFER IS NOT BEING MADE, DIRECTLY OR INDIRECTLY, IN OR INTO, OR BY USE OF THE POSTAL SERVICE OF, OR BY ANY MEANS OR INSTRUMENTALITY (INCLUDING, WITHOUT LIMITATION, FACSIMILE TRANSMISSION, TELEX, TELEPHONE OR THE INTERNET) OF INTERSTATE OR FOREIGN COMMERCE OF, OR ANY FACILITIES OF A NATIONAL SECURITIES EXCHANGE OF, AUSTRALIA, CANADA, HONG KONG, JAPAN, NEW ZEALAND OR SOUTH AFRICA. THE TENDER OFFER CANNOT BE ACCEPTED, DIRECTLY OR INDIRECTLY, BY ANY SUCH USE, MEANS OR INSTRUMENTALITY OR FROM WITHIN, AUSTRALIA, CANADA, HONG KONG, JAPAN, NEW ZEALAND OR SOUTH AFRICA AND ANY PURPORTED ACCEPTANCE OF THE TENDER OFFER RESULTING DIRECTLY OR INDIRECTLY FROM A VIOLATION OF THESE RESTRICTIONS WILL BE INVALID.

THIS STOCK EXCHANGE RELEASE HAS BEEN PREPARED IN COMPLIANCE WITH FINNISH LAW, THE RULES OF NASDAQ HELSINKI LTD AND THE HELSINKI TAKEOVER CODE AND THE INFORMATION DISCLOSED MAY NOT BE THE SAME AS THAT WHICH WOULD HAVE BEEN DISCLOSED IF THIS STOCK EXCHANGE RELEASE HAD BEEN PREPARED IN ACCORDANCE WITH THE LAWS OF JURISDICTIONS OUTSIDE OF FINLAND.

Information for shareholders of Caverion in the United States

The Tender Offer is made for the issued and outstanding shares of Caverion, which is domiciled in Finland, and is subject to Finnish disclosure and procedural requirements. The Tender Offer is made in the United States pursuant to Section 14(e) and Regulation 14E under the Exchange Act, subject to the exemption provided under Rule 14d-1(c) under the Exchange Act for a Tier I tender offer (the "Tier I Exemption") and Rule 802 (the "802 Exemption") under the U.S. Securities Act of 1933 (the "U.S. Securities Act"), and otherwise in accordance with the disclosure and procedural requirements of Finnish law, including with respect to the Tender Offer timetable, settlement procedures, withdrawal, waiver of conditions and timing of payments, which are different from those of the United States. In particular, the financial information included in this stock exchange release has been prepared in accordance with applicable accounting standards in Finland, which may not be comparable to the financial statements or financial information of U.S. companies. The Tender Offer is made to Caverion's shareholders resident in the United States on the same terms and conditions as those made to all other shareholders of Caverion to whom an offer is made. Any informational documents, including this stock exchange release, are being disseminated to U.S. shareholders on a basis comparable to the method that such documents are provided to Caverion's other shareholders.

To the extent permissible under applicable law or regulations, the Offeror and its affiliates or its brokers and its brokers' affiliates (acting as agents for the Offeror or its affiliates, as applicable) may from time to time after the date of this stock exchange release and during the pendency of the Tender Offer, and other than pursuant to the Tender Offer, directly or indirectly purchase or arrange to purchase Shares or any securities that are convertible into, exchangeable for or exercisable for Shares. These purchases may occur either in the open market at prevailing prices or in private transactions at negotiated prices. To the extent information about such purchases or arrangements to purchase is made public in Finland, such information will be disclosed by means of a press release or other means reasonably calculated to inform U.S. shareholders of Caverion of such information. In addition, the financial advisers to the Offeror may also engage in ordinary course trading activities in securities of Caverion, which may include purchases or arrangements to purchase such securities. To the extent required in Finland, any information about such purchases will be made public in Finland in the manner required by Finnish law.

ANY COMMENT ON WHETHER THE CONTENT IN THE TENDER OFFER DOCUMENT OR THE SUPPLEMENT DOCUMENT IS CORRECT OR COMPLETE. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENCE IN THE UNITED STATES.

Disclaimer

UBS AG London Branch is authorised and regulated by the Financial Market Supervisory Authority in Switzerland. It is authorised by the Prudential Regulation Authority and subject to regulation by the Financial Conduct Authority and limited regulation by the Prudential Regulation Authority in the United Kingdom. UBS AG London Branch is acting exclusively for the Offeror and no one else in connection with the Tender Offer or the matters referred to in this document, will not regard any other person (whether or not a recipient of this document) as its client in relation to the Tender Offer and will not be responsible to anyone other than the Offeror for providing the protections afforded to its clients or for providing advice in relation to the Tender Offer or any other transaction or arrangement referred to in this document.

Advium Corporate Finance Ltd is acting exclusively on behalf of the Offeror and no one else in connection with the Tender Offer or other matters referred to in this document, does not consider any other person (whether the recipient of this document or not) as a client in connection to the Tender Offer, and is not responsible to anyone other than the Offeror for providing protection or providing advice in connection with the Tender Offer or any other transaction or arrangement referred to in this document.

Goldman Sachs International, which is authorized by the Prudential Regulation Authority and regulated by the Financial Conduct Authority and the Prudential Regulation Authority in the United Kingdom, is acting exclusively for the Offeror and no one else in connection with the Tender Offer and the matters set out in this stock exchange release, and will not be responsible to anyone other than the Offeror for providing the protections afforded to clients of Goldman Sachs International, or for giving advice in connection with the Tender Offer or any matter or arrangement referred to in this stock exchange release.

Nordea Bank Abp is acting as financial adviser to the Offeror and arranger outside of the United States and no one else in connection with the Tender Offer, and will not regard any other person as its client in relation to the Tender Offer and will not be responsible to anyone other than the Offeror for providing the protection afforded to clients of Nordea Bank Abp, nor for providing advice in relation to the Tender Offer or the other matters referred to in this stock exchange release. For the avoidance of doubt, Nordea Bank Abp is not registered as a broker or dealer in the United States of America and will not be engaging in direct communications relating to the Tender Offer with investors located within the United States (whether on a reverse inquiry basis or otherwise). U.S. shareholders should contact their brokers with any questions relating to the Tender Offer.

BNP Paribas, which is duly authorized and lead-supervised by the European Central Bank and the Autorité de Contrôle Prudentiel et de Résolution, is acting exclusively for the Offeror and no one else in connection with the Tender Offer and the matters set out in this stock exchange release, and will not be responsible to anyone other than the Offeror for providing the protections afforded to clients of BNP Paribas, or for giving advice in connection with the Tender Offer or any matter or arrangement referred to in this stock exchange release.

APPENDIX M - CAVERION'S STOCK EXCHANGE RELEASE OF FEBRUARY 27, 2023

Board of Directors of Caverion continues evaluating Triton's improved tender offer and the Bain Consortium's improved offer

Caverion Corporation Tender offer 27 February 2023 at 8.30 a.m. EET

Board of Directors of Caverion continues evaluating Triton's improved tender offer and the Bain Consortium's improved offer

Board of Directors of Caverion continues evaluating Triton's improved tender offer and the Bain consortium's improved offer

The Board of Directors of Caverion Corporation (the Board) is in the process of evaluating Crayfish BidCo Oy's (Triton) improved tender offer as announced on 24 February 2023 as well as the improved tender offer announced by North Holdings 3 Oy (the Bain Consortium) on 24 January 2023. The Board is currently engaging in discussions with both Triton and the Bain Consortium and offers both parties, as it has done throughout the process, the opportunity to progress their tender offers pursuant to the interests of all Caverion shareholders. The Board expects to present its view on the two tender offers, including a potential change in recommendation, latest on 9 March 2023 after expiry of the eight business days right to match period for the Bain Consortium under the Combination Agreement signed and announced on 3 November 2022 (as amended by an Addendum on 24 January 2023).

The Board also notes the Bain Consortium's announcement of 24 February 2023 stating that it evaluates Triton's improved tender offer and its alternatives and will announce its conclusions in due course. Further, the Bain Consortium has announced that it will also supplement the tender offer document concerning its tender offer due to the improved Triton offer and will simultaneously extend the offer period in its offer as required under applicable law and the regulations and guidelines of the Finnish Financial Supervisory Authority.

"The Board of Directors of Caverion continues to work diligently in the interests of the company and all of its shareholders. We are looking forward to continuing the discussions with both parties with the aim of the best possible offer being presented to all of our shareholders," says Mats Paulsson, Chairman of the Board of Directors of Caverion.

Distribution:

Nasdaq Helsinki, main media, www.caverion.com

ABOUT CAVERION

advisory services. At the end of December 2022, there were almost 14,500 professionals serving customers at the service of Caverion Group in 10 countries.

IMPORTANT INFORMATION

Information for shareholders of Caverion in the United States

Shareholders of Caverion in the United States are advised that the shares are not listed on a U.S. securities exchange and that Caverion is not subject to the periodic reporting requirements of the U.S. Securities Exchange Act of 1934, as amended (the "Exchange Act"), and is not required to, and does not, file any reports with the U.S. Securities and Exchange Commission (the "SEC") thereunder.

The tender offer will be made for the issued and outstanding shares of Caverion, which is domiciled in Finland, and is subject to Finnish disclosure and procedural requirements. The tender offer is made in the United States pursuant to Section 14(e) and Regulation 14E under the Exchange Act, subject to the exemption provided under Rule 14d-1(d) under the Exchange Act, and otherwise in accordance with the disclosure and procedural requirements of Finnish law, including with respect to the tender offer timetable, settlement procedures, withdrawal, waiver of conditions and timing of payments, which are different from those of the United States. In particular, the financial information included in this announcement has been prepared in accordance with applicable accounting standards in Finland, which may not be comparable to the financial statements or financial information of U.S. companies. The tender offer is made to Caverion's shareholders resident in the United States on the same terms and conditions as those made to all other shareholders of Caverion to whom an offer is made. Any informational documents, including this announcement, are being disseminated to U.S. shareholders on a basis comparable to the method that such documents are provided to Caverion's other shareholders.

Neither the SEC nor any U.S. state securities commission has approved or disapproved the tender offer, passed upon the merits or fairness of the tender offer, or passed any comment upon the adequacy, accuracy or completeness of the disclosure in relation to the tender offer. Any representation to the

contrary is a criminal offence in the United States.

The receipt of cash pursuant to the tender offer by a U.S. holder of shares may be a taxable transaction for U.S. federal income tax purposes and under applicable U.S. state and local, as well as foreign and other, tax laws. Each holder of shares is urged to consult its independent professional advisers immediately regarding the tax and other consequences of accepting the tender offer.

To the extent the tender offer is subject to U.S. securities laws, those laws only apply to U.S. holders of shares and will not give rise to claims on the part of any other person. It may be difficult for Caverion's shareholders to enforce their rights and any claims they may have arising under the U.S. federal securities laws, since the Offeror and Caverion are located in non-U.S. jurisdictions and some or all of their respective officers and directors may be residents of non-U.S. jurisdictions. Caverion shareholders may not be able to sue the Offeror or Caverion or their respective officers or directors in a non -U.S. court for violations of the U.S. federal securities laws. It may be difficult to compel the Offeror and Caverion and their respective affiliates to subject themselves to a U.S. court's judgment.

NEITHER THE U.S. SECURITIES AND EXCHANGE COMMISSION NOR ANY U.S. STATE SECURITIES COMMISSION HAS APPROVED OR DISAPPROVED THE TENDER OFFER, PASSED ANY COMMENTS UPON THE MERITS OR FAIRNESS OF THE TENDER OFFER, PASSED ANY COMMENT UPON THE ADEQUACY OR COMPLETENESS OF THE TENDER OFFER DOCUMENT OR PASSED ANY COMMENT ON WHETHER THE CONTENT IN THE TENDER OFFER DOCUMENT IS CORRECT OR COMPLETE. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENCE IN THE UNITED STATES.

Disclaimer

Bank of America Europe DAC, Stockholm branch, a subsidiary of Bank of America Corporation, is acting exclusively for Caverion and no one else in connection with the tender offer and the matters set out in this stock exchange release, and will not be responsible to anyone other than Caverion for providing the protections afforded to its clients or for providing advice in relation to the tender offer or any matter or arrangement referred to in this stock exchange release.

Caverion Corporation

Investor and Media enquiries:

Milena Hæggström, Head of Investor Relations and External Communications, Caverion Corporation, tel. +358 40 5581 328, [email protected]

www.caverion.com @CaverionGroup

#BuildingPerformance #Energywise #Caverion

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Caverion Oyj

3260_tar_2023-02-28_d2d79e40-95f5-4165-a906-abcc0590d1a8.pdf

THE FOURTH SUPPLEMENT DOCUMENT TO NORTH HOLDINGS 3 OY'S TENDER OFFER DOCUMENT DATED NOVEMBER 24, 2022, RELATING TO THE VOLUNTARY PUBLIC TENDER OFFER FOR ALL ISSUED AND OUTSTANDING SHARES IN CAVERION CORPORATION

February 28, 2023

Supplements to the Tender Offer Document

Caverion's stock exchange release

Supplements relating to the extension of the Offer Period

Availability of Documents

Information for Shareholders in the United States

Forward-looking Statements

APPENDIX K - CAVERION'S STOCK EXCHANGE RELEASE OF FEBRUARY 24, 2023

Crayfish Bidco Oy improves its tender offer for Caverion Corporation and has entered into conditional agreements to increase its shareholding in Caverion Corporation to 13.8 percent

Crayfish Bidco Oy improves its tender offer for Caverion Corporation and has entered into conditional agreements to increase its shareholding in Caverion Corporation to 13.8 percent

ABOUT CAVERION

IMPORTANT INFORMATION

Disclaimer

CAVERION CORPORATION

Investor and Media enquiries:

APPENDIX L - OFFEROR'S STOCK EXCHANGE RELEASE OF FEBRUARY 24, 2023

North Holdings 3 Oy evaluates Crayfish BidCo Oy's amended offer for Caverion Corporation

North Holdings 3 Oy evaluates Crayfish BidCo Oy's amended offer for Caverion Corporation

Investor and Media enquiries:

ABOUT THE CONSORTIUM

IMPORTANT INFORMATION

Information for shareholders of Caverion in the United States

ANY COMMENT ON WHETHER THE CONTENT IN THE TENDER OFFER DOCUMENT OR THE SUPPLEMENT DOCUMENT IS CORRECT OR COMPLETE. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENCE IN THE UNITED STATES.

Disclaimer

APPENDIX M - CAVERION'S STOCK EXCHANGE RELEASE OF FEBRUARY 27, 2023

Board of Directors of Caverion continues evaluating Triton's improved tender offer and the Bain Consortium's improved offer

Board of Directors of Caverion continues evaluating Triton's improved tender offer and the Bain Consortium's improved offer

Board of Directors of Caverion continues evaluating Triton's improved tender offer and the Bain consortium's improved offer

Distribution:

ABOUT CAVERION

IMPORTANT INFORMATION

Disclaimer

Investor and Media enquiries:

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