Last day of trading in warrants of series TO 8 in Expres2ion Biotechnologies is today, 18 September 2023

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Hørsholm, Denmark, 18 September 2023 - Today, 18 September 2023, is the last day of trading in warrants of series TO 8 (the "Warrants"). The exercise period for the Warrants runs up to and including 21 September 2023. One (1) Warrant gives the right to subscribe for one (1) new share in ExpreS2ion. The exercise price is SEK 1.57 per share. Note that Warrants not sold by today, 18 September 2023, or alternatively used to subscribe for shares no later than on 21 September 2023, expire without value.

ExpreS²ion completed a rights issue of units during the second quarter of 2023. Within the scope of the rights issue, ExpreS²ion issued 11,115,398 Warrants. Furthermore, ExpreS²ion issued an additional 527,573 Warrants to guarantors in the rights issue who chose to receive guarantee compensation in units. One (1) unit consisted of one (1) newly issued share and one (1) Warrant. One (1) Warrant gives the owner the right to subscribe for one (1) new share in the Company. The exercise price for the Warrants was determined to 70 percent of the volume-weighted average price in the Company's share on Nasdaq First North Growth Market during the measurement period, from 21 August 2023 to 1 September 2023. During the measurement period, the volume-weighted average price in the Company's share was approximately SEK 2.24, therefore the exercise price for the Warrants is set to SEK 1.57. The exercise period for the Warrants runs from 7 September 2023 up to and including 21 September 2023.

If all the Warrants are exercised, the Company will receive approximately SEK 18.3 million before issuing costs. For the Warrants to not expire without value, it is required that the holder actively subscribes for new shares no later than 21 September 2023 or sell the Warrants no later than today, 18 September 2023. Please observe that certain nominees might close their applications earlier than 21 September 2023.

Full terms and conditions regarding the Warrants and information about the Company is available in the prospectus which was approved by the Swedish Financial Supervisory Authority (the "SFSA") and published by the Company on 27 March 2023. The prospectus is available on the Company's investor relations website investor.expres2ionbio.com, as well as the SFSA's website www.fi.se.

Summarised terms for the warrants of series TO 8

• Exercise period: 7 September 2023 – 21 September 2023.

• Issue size: 11,642,971 Warrants, which entitles to subscription of 11,642,971 shares. If all the Warrants are exercised, the Company will receive approximately SEK 18.3 million before issuing costs.

• Exercise price: SEK 1.57 per share.

• Last day for trading in Warrants: 18 September 2023 (today).

• Dilution etc.: If all Warrants are exercised the share capital will increase with SEK 1,293,663.446792 from SEK 5,472,196.343262 to SEK 6,765,859.790054. If all Warrants are exercised the number of shares will increase with 11,642,971 shares, from 49,249,767 shares to 60,892,738 shares. The dilution at the exercise of all Warrants amounts to approximately 19% percent of the number of shares and number of votes.

Note that the Warrants that are not exercised on 21 September 2023 at the latest, or sold by today, 18 September 2023 at the latest, will expire without value. For the Warrants not to lose their value, the holder must actively subscribe for new shares or sell the Warrants.

How warrants are exercised

• Nominee-registered warrants (Custody account) - Subscription and payment by the exercise of Warrants shall be made in accordance with instructions from each nominee. Please contact your nominee for additional information.

• Direct-registered warrants (Securities account) - No issue report nor any instructions regarding payments will be sent out. Subscriptions will be made through simultaneous payment in accordance with the instructions on the application form.

The Warrants will then be replaced by interim shares awaiting registration at the Swedish Companies Registration Office.

Additional information can be found in the TO 8 Subscription Brochure, which can be found in the Rights Issue 2023 section of the ExpreS²ion investor website, under IPO and Rights Issues.

The application form including instructions for payment will be available at ExpreS²ion's investor relations website, investor.expreS2ionbio.com and Vator Securities website (www.vatorsecurities.se).

Advisors
Vator Securities act as financial advisor and issuing agent to the Company in connection with the transaction. Advokatfirman Schjødt is the Company’s legal advisor in connection with the transaction.

Certified Adviser
Svensk Kapitalmarknadsgranskning AB

The information was sent for publication, through the agency of the contact persons set out above, at the time stated by the Company’s news distributor, Cision, at the publication of this press release.