# EDGAR Filing Document

**Accession Number:** 0001781174
**File Stem:** 0001193125-26-115139
**Filing Date:** 2026-3
**Character Count:** 54827
**Document Hash:** 54e37744becc428df98ce1323e464b83
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-115139.hdr.sgml**: 20260319

**ACCESSION NUMBER**: 0001193125-26-115139

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 60

**CONFORMED PERIOD OF REPORT**: 20260319

**ITEM INFORMATION**: Results of Operations and Financial Condition

**ITEM INFORMATION**: Regulation FD Disclosure

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20260319

**DATE AS OF CHANGE**: 20260319

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Acrivon Therapeutics, Inc.
- **CENTRAL INDEX KEY:** 0001781174
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 825125532
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41551
- **FILM NUMBER:** 26772402

**BUSINESS ADDRESS:**
- **STREET 1:** 480 ARSENAL WAY, SUITE 100
- **CITY:** WATERTOWN
- **STATE:** MA
- **ZIP:** 02472
- **BUSINESS PHONE:** 617-207-8979

**MAIL ADDRESS:**
- **STREET 1:** 480 ARSENAL WAY, SUITE 100
- **CITY:** WATERTOWN
- **STATE:** MA
- **ZIP:** 02472

?xml version='1.0' encoding='ASCII'? 8-K

**UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549**

------

## FORM 8-K

------

**CURRENT REPORT**

**Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934**

**Date of Report (Date of earliest event reported):** March 19, 2026<br>

------

Acrivon Therapeutics, Inc.

**(Exact name of Registrant as Specified in Its Charter)**

------

---

| | | |
|:---|:---|:---|
| Delaware | 001-41551 | 82-5125532 |
| **(State or Other Jurisdiction<br>of Incorporation)** | **(Commission File Number)** | **(IRS Employer<br>Identification No.)** |
| 480 Arsenal Way<br>Suite 100 |  |  |
| Watertown**,** Massachusetts |  | 02472 |
| **(Address of Principal Executive Offices)** |  | **(Zip Code)** |

---

**Registrant's Telephone Number, Including Area Code:** (617) 207-8979<br>

**(Former Name or Former Address, if Changed Since Last Report)**

------

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

**Securities registered pursuant to Section 12(b) of the Act:**

---

| | | |
|:---|:---|:---|
| **<br>Title of each class** | **Trading<br>Symbol(s)** | **<br>Name of each exchange on which registered** |
| Common Stock, par value $0.001 per share | ACRV | The Nasdaq Stock Market LLC |

---

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

------

**Item 2.02. Results of Operations and Financial Condition.**

On March 19, 2026, Acrivon Therapeutics, Inc. (the "Company") issued a press release announcing its financial results for the fourth quarter and full year ended December 31, 2025. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

**Item 7.01 Regulation FD Disclosure.**

The Company posted to the "Investors & Media" section of the Company's website at ir.acrivon.com, a corporate presentation providing an update on the Company's business (the "Corporate Presentation"). This updated Corporate Presentation includes pipeline and other slide updates reflecting the plan to initiate arm 4 of the registrational intent ACR-368 phase 2b study, which aims to study ACR-368 monotherapy in serous type endometrial cancer subjects with ≤2 prior lines of therapy. This arm has been initiated based on promising clinical data and observed OncoSignature biomarker (BM) upregulation. In addition, the company has completed exploratory arm 2 of the study which treated BM- subjects with ≤3 prior lines of therapy using ACR-368 with ultra low dose gemcitabine (ULDG) sensitization. Objectives of this arm were achieved, supporting that ULDG may contribute to ACR-368 efficacy in BM- subjects with a favorable tolerability profile.

A Copy of the Corporate Presentation is attached hereto as Exhibit 99.2, and is incorporated by reference into this Item 7.01 of this Current Report on Form 8-K.

The information contained in Item 2.02 and Item 7.01, including Exhibit 99.1 and 99.2, shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference into any other filing with the Securities and Exchange Commission made by the Company, regardless of any general incorporation language in such filings.

## Item 9.01 Financial Statements and Exhibits.

---

| | |
|:---|:---|
| **Exhibit**<br>**Number** | **Description** |
| 99.1 | [<u>Press Release dated March 19, 2026</u>](acrv-ex99_1.htm) |
| 99.2 | [<u>Acrivon Therapeutics, Inc., Corporate Presentation</u>](acrv-ex99_2.htm) |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document) |

---

------

**SIGNATURES**

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

---

| | | | |
|:---|:---|:---|:---|
|  |  |  | **Acrivon Therapeutics, Inc.** |
| Date: | March 19, 2026 | By:  | /s/ Peter Blume-Jensen |
|  |  |  | Name: Peter Blume-Jensen, M.D., Ph.D.<br>Title: Chief Executive Officer and President<br>|

---

------

## Exhibit 99.1

*Exhibit 99.1*

![img28311487_0.jpg](img28311487_0.jpg)

**Acrivon Therapeutics Reports Fourth Quarter and Full Year 2025 Financial Results and Recent Business Highlights**

*Maturing data from the ongoing registrational intent Phase 2b ACR-368 study showed a confirmed overall response rate (cORR) of 52% in serous endometrial cancer (EC)*

*Late-breaking oral presentation and corporate KOL panel at ESGO 2026 highlighted strong ACR-368 data in serous EC, a high unmet need subtype responsible for ~50% of EC mortality*

*Initiated Arm 3 (ACR-368 + ultra low-dose gemcitabine) and adding Arm 4 (ACR-368) Phase 2b cohorts in all-comer (biopsy-independent) serous EC subjects*

*Initial Phase 1 ACR-2316 data in AP3-prioritized solid tumor types showed favorable tolerability and promising clinical activity, notably in heavily pre-treated lung cancer subjects*

*Cash, cash equivalents and marketable securities of $118.6 million as of December 31, 2025, expected to fund operations into the second quarter of 2027*

**<br> **WATERTOWN, Massachusetts, March 19, 2026** – Acrivon Therapeutics, Inc. ("Acrivon" or "Acrivon Therapeutics") (Nasdaq: ACRV), a clinical stage biotechnology company discovering and developing precision medicines utilizing its proprietary Generative Phosphoproteomics AP3 (Acrivon Predictive Precision Proteomics) platform deployed for rational drug design and predictive clinical development, today reported financial results for the fourth quarter and full year ended December 31, 2025 and reviewed recent business highlights.

"It's an exciting time for the company as we build on strong maturing data and clinical momentum," said Peter Blume-Jensen, M.D., Ph.D., chief executive officer, president, and founder of Acrivon. "Our compelling data from ACR-368 in EC was well received at the ESGO Congress, reinforced by powerful commentary from world-renowned key opinion leaders at our live webcast, after the late-breaking oral presentation by Dr. Konstantinopoulos from the Dana- Farber Cancer Institute. Serous EC represents a particularly significant unmet need with a mortality rate resulting in 40-50% of all EC deaths. Through our rapidly maturing data, we are strategically generating multiple opportunities towards potential registration for ACR-368, including our announcement today of a fourth arm to our study to investigate ACR-368 monotherapy in biomarker-unselected serous EC subjects. Elsewhere in our pipeline, ACR-2316 has already shown promising clinical activity in lung cancer, underscoring the potential of its differentiated mechanism of action. Finally, we continue to build our pipeline with our next development candidate, ACR-6840, and new programs, reflecting our sustained AP3-driven innovation and commitment to long-term value creation."

**Recent Highlights**

**ACR-368: CHK1 / CHK2 Inhibitor**

------

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•Clinical data from the ongoing, registrational-intent ACR-368 Phase 2b trial was presented in a late-breaking oral presentation at the European Society of Gynecological Oncology (ESGO) Annual Congress by Dr. Panagiotis (Panos) Konstantinopoulos, M.D., Ph.D., from the Dana-Farber Cancer Institute

oConsistent with higher BM levels in serous versus non-serous EC, an interim analysis across both OncoSignature-positive (BM+) and BM- serous EC subjects showed a cORR of 52% (N = 23) versus 22% (N = 37) in non-serous EC subjects; all subjects in this analysis received up to two prior lines of therapy (LoT), including chemotherapy and anti-PD-1

oBased on this, Arm 3 was initiated in late 2025 to generate prospective data of ACR-368 with ULDG sensitization in all-comer (no pre-treatment biopsy or biomarker stratification) serous EC subjects with ≤2 prior LoT and is actively enrolling and dosing patients in the US, with 4 major EU countries on track to be activated by end of Q1 further accelerating enrollment through the addition of more than 20 EU sites

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•Following Dr. Konstantinopoulos' presentation, the company hosted a KOL panel at ESGO, during which KOL experts expressed strong enthusiasm for ACR-368 and discussed the promising clinical data, emphasizing the high unmet need and potential impact for patients suffering from serous EC.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•Building on promising clinical data and observed biomarker upregulation in serous EC, the company announced today that it plans to initiate a fourth cohort (Arm 4) in the ongoing ACR-368 Phase 2b study in the first half of 2026. This arm will enroll all-comer (BM-unselected) serous EC subjects, similar to Arm 3, but subjects will be treated with ACR-368 monotherapy and otherwise identical inclusion criteria to Arm 3.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•Company also announced today that it has completed the exploratory Arm 2 of the study which treated BM- EC subjects with ≤3 prior LoT using ACR-368 with ULDG sensitization. Objectives of this arm were achieved, supporting that ULDG may contribute to ACR-368 efficacy in BM- subjects with a favorable tolerability profile.

**ACR-2316: WEE1 / PKMYT1 Inhibitor**

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•Initial data from the Phase 1 monotherapy dose-escalation trial showed a favorable tolerability profile and demonstrated clinical activity with tumor shrinkage, notably including partial responses and strong disease control in small cell lung cancer (SCLC) and squamous non-small cell lung cancer (NSCLC), tumor types predicted sensitive by AP3 not previously shown sensitive to WEE1 or PKMYT1 inhibitors in development

**ACR-6840: Oral CDK11 Inhibitor** 

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•Nominated as internally-discovered development candidate from company's AP3-driven cell cycle program

**Strengthened Precision Medicine Therapeutics Capabilities** 

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•Launched wholly-owned and operated Clinical Laboratory Improvement Amendment (CLIA) certified laboratory with full license to conduct patient sample testing and develop companion diagnostics

**Anticipated Upcoming Milestones** 

------

***ACR-368 Ongoing Registrational-Intent Phase 2b Study***

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•Achieve CTA approval in EU for the ongoing (US) registrational intent serous EC all-comer Arm 3 (ACR-368 + ULDG) by Q1 2026

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•Initial clinical data from Arm 3 and additional update on Arm 1 of the ACR-368 Phase 2b trial in mid-2026

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•Initiate enrollment for the registrational intent serous EC all-comer Arm 4 (ACR-368) in the US in first half of 2026

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•Achieve readiness for Phase 3 confirmatory trial for ACR-368 in combination with PD-1 therapy by mid-2026

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•Complete enrollment (up to N = 90 subjects) in the registrational intent serous EC all-comer Arm 3 (ACR-368 + ULDG) in Q4 2026

***Broader Pipeline***

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•Additional ACR-2316 Phase 1 clinical data for weekly and bi-weekly dosing regimens and transition into dose expansion in AP3-identified tumor types in 2026

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•Submit IND filing to the FDA for ACR-6840 in Q4 2026

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•Initiate additional internal programs utilizing the AP3 platform in 2026

**Fourth Quarter and Full Year 2025 Financial Results**

Net loss for the quarter and full year ended December 31, 2025 was $19.0 million and $77.9 million, respectively. This compares to a net loss of $22.8 million and $80.6 million, respectively for the same periods in 2024.

Research and development expenses were $14.7 million for the quarter ended December 31, 2025, and $60.0 million for the full year 2025, compared to $18.6 million and $64.0 million, respectively, for the same periods in 2024. The difference was significantly driven by fewer milestones scheduled and incurred in the current period, as well as the prioritization of endometrial cancer in the ACR-368 clinical trial.

General and administrative expenses were $5.4 million for the quarter ended December 31, 2025, and $24.1 million for the full year 2025, compared to $6.3 million and $25.2 million, respectively, for the same periods in 2024. The difference was primarily due to a decrease in personnel costs, inclusive of non-cash stock compensation expense.

As of December 31, 2025, the company had cash, cash equivalents and investments of $118.6 million, which is expected to fund operating expenses and capital expenditure requirements into the second quarter of 2027.

**About Acrivon Therapeutics** <br> Acrivon is a clinical stage biopharmaceutical company discovering and developing precision medicines utilizing its proprietary Generative Phosphoproteomics AP3 platform. The platform allows the company to interpret and quantify compound specific, drug-regulated pathway activity levels inside the intact cell in an unbiased manner, yielding terabytes of proprietary data and

------

delivering rapid, actionable insights. The Generative Phosphoproteomics AP3 platform is comprised of a growing suite of powerful, internally-developed tools, including the AP3 Data Portal, converting multimodal data into structured data for generative AI analyses, the AP3 Kinase Substrate Relationship Predictor and the AP3 Interactome. These distinctive capabilities enable the company to go beyond the limitations of traditional drug discovery, as well as current AI-based target-centric drug discovery, and rapidly design highly differentiated compounds with desirable pathway effects through intracellular protein network analyses and advance these agents into the clinic for streamlined development.

Acrivon is currently advancing its lead program, ACR-368 (also known as prexasertib), a selective small molecule inhibitor targeting CHK1 and CHK2 in a potentially registrational Phase 2 trial for endometrial cancer. The company has received Fast Track designation from the Food and Drug Administration, or FDA, for the investigation of ACR-368 as a monotherapy based on OncoSignature-predicted sensitivity in patients with endometrial cancer. The FDA has granted a Breakthrough Device designation for the ACR-368 OncoSignature assay for the identification of patients with endometrial cancer who may benefit from ACR-368 treatment.

In addition to ACR-368, Acrivon is also leveraging its proprietary Generative Phosphoproteomics AP3 platform for developing its co-crystallography-driven, internally discovered pipeline programs. These include ACR-2316, the company's second clinical stage asset, a novel, potent, selective WEE1/PKMYT1 inhibitor designed for superior single-agent activity through strong activation of not only CDK1 and CDK2, but also of PLK1 to drive pro-apoptotic cell death, as observed in preclinical studies against benchmark inhibitors. The Phase 1 trial of ACR-2316 is advancing, with weekly dosing regimens established. Initial data has shown a favorable tolerability profile limited to transient, mechanism-based hematological adverse events, predominantly neutropenia and initial clinical activity across AP3-selected solid tumor types, including PRs in endometrial cancer, as well as SCLC and sqNSCLC, two tumor types which have not shown sensitivity to other clinical WEE1 or PKMYT1 inhibitors currently in development. In addition, the company is advancing ACR-6840, an internally discovered development candidate targeting CDK11.

**Forward-Looking Statements**<br>This press release includes certain disclosures that contain "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995 about us and our industry that involve substantial risks and uncertainties. All statements other than statements of historical facts contained in this press release, including statements regarding our future results of operations or financial condition, business strategy and plans and objectives of management for future operations, are forward-looking statements. In some cases, you can identify forward-looking statements because they contain words such as "anticipate," "believe," "contemplate," "continue," "could," "estimate," "expect," "intend," "may," "plan," "potential," "predict," "project," "should," "target," "will," or "would" or the negative of these words or other similar terms or expressions. Forward-looking statements are based on Acrivon's current expectations and are subject to inherent uncertainties, risks and assumptions that are difficult to predict. Factors that could cause actual results to differ include, but are not limited to, risks and uncertainties that are described more fully in the section titled "Risk Factors" in our reports filed with the Securities and Exchange Commission. Forward-looking statements contained in this press release are made as of this date, and Acrivon undertakes no duty to update such information except as required under applicable law.

------

**Investor and Media Contacts:** <br>Adam D. Levy, Ph.D., M.B.A.<br>alevy@acrivon.com

Alexandra Santos <br>asantos@wheelhouselsa.com

---

| | | | | |
|:---|:---|:---|:---|:---|
| **Acrivon Therapeutics, Inc.<br>Condensed Consolidated Statements of Operations and Comprehensive Loss**<br> (in thousands, except share and per share data) | **Acrivon Therapeutics, Inc.<br>Condensed Consolidated Statements of Operations and Comprehensive Loss**<br> (in thousands, except share and per share data) | **Acrivon Therapeutics, Inc.<br>Condensed Consolidated Statements of Operations and Comprehensive Loss**<br> (in thousands, except share and per share data) | **Acrivon Therapeutics, Inc.<br>Condensed Consolidated Statements of Operations and Comprehensive Loss**<br> (in thousands, except share and per share data) | **Acrivon Therapeutics, Inc.<br>Condensed Consolidated Statements of Operations and Comprehensive Loss**<br> (in thousands, except share and per share data) |
|  | **Three Months Ended December 31,** | **Three Months Ended December 31,** | **Year Ended December 31,** | **Year Ended December 31,** |
|  | **2025** | **2024** | **2025** | **2024** |
| Operating expenses: |  |  |  |  |
| &nbsp;&nbsp;Research and development | $14746 | $18630 | $59990 | $63992 |
| &nbsp;&nbsp;General and administrative | 5370 | 6324 | 24124 | 25207 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total operating expenses | 20116 | 24954 | 84114 | 89199 |
| Loss from operations | (20116) | (24954) | (84114) | (89199) |
| Other income (expense), net: |  |  |  |  |
| &nbsp;&nbsp;Interest income | 1247 | 2363 | 6479 | 9201 |
| &nbsp;&nbsp;Other expense, net | (116) | (240) | (270) | (558) |
| &nbsp;&nbsp;&nbsp;&nbsp;Total other income, net | 1131 | 2123 | 6209 | 8643 |
| Net loss | $(18985) | $(22831) | $(77905) | $(80556) |
| Net loss per share - basic and diluted | $(0.49) | $(0.60) | $(2.02) | $(2.38) |
| Weighted-average common stock outstanding - basic and diluted | 38660626 | 38242412 | 38509281 | 33791817 |
| Comprehensive loss: |  |  |  |  |
| Net loss | $(18985) | $(22831) | $(77905) | $(80556) |
| Other comprehensive income (loss): |  |  |  |  |
| &nbsp;&nbsp;Unrealized (loss) gain on available-for-sale investments, net of tax | (1) | (335) | (336) | 530 |
| Comprehensive loss | $(18986) | $(23166) | $(78241) | $(80026) |

---

------

---

| | | |
|:---|:---|:---|
| **Acrivon Therapeutics, Inc.<br>Condensed Consolidated Balance Sheets**<br> (in thousands) | **Acrivon Therapeutics, Inc.<br>Condensed Consolidated Balance Sheets**<br> (in thousands) | **Acrivon Therapeutics, Inc.<br>Condensed Consolidated Balance Sheets**<br> (in thousands) |
|  | **December 31,** | **December 31,** |
|  | **2025** | **2024** |
| **Assets** |  |  |
| &nbsp;&nbsp;Cash and cash equivalents | $41499 | $39818 |
| &nbsp;&nbsp;Investments | 77083 | 144751 |
| &nbsp;&nbsp;Other assets | 11135 | 12019 |
| &nbsp;&nbsp;&nbsp;&nbsp;Total assets | $129717 | $196588 |
| **Liabilities and Stockholders' Equity** |  |  |
| &nbsp;&nbsp;Liabilities | $17201 | $19802 |
| &nbsp;&nbsp;Stockholders' Equity | 112516 | 176786 |
| &nbsp;&nbsp;&nbsp;&nbsp;Total Liabilities and Stockholders' Equity | $129717 | $196588 |

---

------

## Exhibit 99.2

![Slide 1](acrv-ex99_2s1.jpg)

ACRIVON PREDICTIVE PRECISION PROTEOMICS (AP3) NEXT GENERATION PRECISION MEDICINE CORPORATE PRESENTATION MARCH 2026 Exhibit 99.2

------

![Slide 2](acrv-ex99_2s2.jpg)

Forward-looking statements Certain information contained in this presentation includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 regarding our future results of operations or financial condition, business strategy and plans and objectives of management for future operations. In some cases, you can identify forward-looking statements because they contain words such as "anticipate," "believe," "contemplate," "continue," "could," "estimate," "expect," "intend," "may," "plan," "potential," "predict," "project," "should," "target," "will," or "would" or the negative of these words or other similar terms or expressions. Our forward-looking statements are based primarily on our current expectations and projections about future events and trends that we believe may affect our business, financial condition and results of operations. The outcome of the events described in the forward-looking statements is subject to risks and uncertainties, including the factors described in our filings with the U.S. Securities and Exchange Commission. New risks and uncertainties emerge from time to time, and it is not possible for us to predict all risks and uncertainties that could have an impact on the forward-looking statements contained in this presentation. The results, events, and circumstances reflected in the forward-looking statements may not be achieved or occur, and actual results, events, or circumstances could differ materially from those described in the forward-looking statements. You are cautioned not to place undue reliance on these forward-looking statements, which are made only as of the date of this presentation. We undertake no obligation to update any forward-looking statements or to reflect new information or the occurrence of unanticipated events, except as required by law.

------

![Slide 3](acrv-ex99_2s3.jpg)

------

![Slide 4](acrv-ex99_2s4.jpg)

Development Site (Boston) Drug development and clinical biomarkers Clinical leadership and trial oversight ML/AI-driven AP3 analyses Precision Proteomics Site (Lund/Copenhagen) Early drug discovery BM identification and drug profiling AP3 mass spectrometry Acrivon therapeutics overview Peter Blume-Jensen, MD, PhD CEO, President, Co-Founder Inventor of AP3 Kristina Masson PhD, MBA EVP, Bus Ops, Lund Site HeadCo-Founder Jesper V. Olsen PhD Novo-Nordisk Foundation Protein Center, Cph. Academic Co-Founder. HQ located in Boston - access to leading drug discovery, BIOTECH, and pharma proteomic hub located in Medicon Valley - Northern Europe`s leading life science cluster For more information, please visit https://acrivon.com Founded 2018, IPO November 2022 (NASDAQ: ACRV)

------

![Slide 5](acrv-ex99_2s5.jpg)

Accomplished leadership team Peter Blume-Jensen, M.D., Ph.D. CEO, President, Co-Founder Eric Devroe, Ph.D. Chief Operating Officer Erick Gamelin, M.D., Ph.D. Chief Development Officer Executive Serono, Merck & Co., Daiichi Sankyo CSO Metamark - Marketed prostate proteomic test ProMark® Inventor Acrivon Predictive Precision Proteomics (AP3) Professor, CEO, national cancer center, appointed by French Minister of Health Executive Amgen, Pfizer, Dynavax, MacroGenics; CMO STEP Pharma >100 ph 1-3 oncology trials Founder and CEO, Opsonix Business executive MD Anderson Cancer Center and Metamark EIR Wyss Institute, Harvard Associate, Flagship Pioneering Mary-Alice Miller, J.D. Chief Legal Officer Over 20 years corporate legal experience Served as general counsel of 2 companies taken public Boston Business Journal "40 Under 40" Kristina Masson, Ph.D., M.B.A Site Head Acrivon AB, Co-Founder EVP Business Operations Cross-functional Leadership Merrimack Pharmaceuticals, MIT/BROAD Founder and CEO, OncoSignature AB (acquired by Acrivon Therapeutics) Mansoor Raza Mirza, M.D. Chief Medical Officer World-renowned oncology KOL Lead investigator for multiple guideline-changing regulatory approvals, including PARP inhibitors for ovarian cancer and new frontline therapy for endometrial cancer Adam Levy, Ph.D., M.B.A. Chief Financial Officer Zentalis Pharmaceuticals, Turning Point Therapeutics, Novartis Head of Corporate Strategy Gilead Sciences Engagement manager in pharma practice at McKinsey & Company

------

![Slide 6](acrv-ex99_2s6.jpg)

Acrivon Pipeline Anticipated Next Milestone Phase 3 Phase 2 Phase 1 Preclinical ACR-368 (CHK1/CHK2) Single-Arm Trial Based on OncoSignature Biomarker Prediction Clinical Data & Dose Expansion Start, 2026 Clinical Update Mid-2026 Endometrial Cancer AP3-Identified Tumor Types Future Development Candidates Auto-Immune/Inflammatory ACR-368 Monotherapy (Breakthrough Device & Fast Track Designations) ACR-2316 (WEE1/ PKMYT1) Early Discovery Dose Escalation and Expansion AP3-Identified Tumor Types ACR-6840 (CDK11) IND Filing, Q4 2026 IND-Enabling Single-Arm Trials without Pretreatment Biopsy or Biomarker Stratification ACR-368 + ULDG Sensitization Initial Clin Data, Mid-2026 BM+ patients, registrational intent Serous all-comer, registrational intent ACR-368 Monotherapy Serous all-comer, registrational intent Initiation, 1H 2026

------

![Slide 7](acrv-ex99_2s7.jpg)

Acrivon AP3-based precision medicine AP3 Clinical BiomarkersPredictive OncoSignature tests Single agent activityTarget/pathway addiction Resistance Mechanisms Rational drug combinations Drug Discovery SAR Optimized pathway effects PD Markers~60,000 per compound Informed in-licensingAP3 profiling of candidates Indication FindingSensitive tumor types Therapeutic IndexDial out AE liabilities Novel Target Identification Activated druggable targets – diseased vs normal Streamlined Clinical Development Predicted sensitive indications with informed dose optimization

------

![Slide 8](acrv-ex99_2s8.jpg)

Infectious, CNS, and other diseases Oncology Fibrotic and inflammatory Autoimmune DDR and Cell Cycle Therapeutic areas Therapeutic modalities Small molecule Bifunctional molecule Antibody ADC Oligo/RNA The AP3 Approach is modality and disease agnostic Current pipeline Next

------

![Slide 9](acrv-ex99_2s9.jpg)

ACR-368: a potent selective CHK1/2 inhibitor Balanced potent (nM) inhibition of CHK1 and CHK2 enabling monotherapy activity Protected by composition-of-matter and salt form patents through 2030 and 2037, ensuring exclusivity Acrivon holds full, unencumbered global rights Clinical efficacy and safety: Durable monotherapy activity across multiple cancers with favorable tolerability and absence of non-hematological, severe toxicities Synergy with Immunotherapy: Preclinical data showing complete tumor regression and immune memory G2/M Checkpoint S Phase Checkpoint M G1 S Cancer Cell Cycle G2 CHK1/2 CHK1/2 Defective G1/S Checkpoint

------

![Slide 10](acrv-ex99_2s10.jpg)

Oncosignature: Drug response prediction in individual patients PROPRIETARY WORKFLOW STEP 1 STEP 2 STEP 3 BIOMARKER IDENTIFICATION THERAPEUTIC PACKAGE Acrivon drug with predictive BM assay PATIENT RESPONDERS Optimal indications and combinations AP3 DRUG PROFILING Resistant Sensitive BIOMARKER VALIDATION HIGH RES PROTEOMICS BY MS CELL LINES, PDX, HUMAN TISSUE CLINICAL SIGNATURE ASSAY 3-6 BIOMARKERS PROSPECTIVE RESPONSE PREDICTION ON PRETREATMENT BIOPSY No benefit Benefit Predicted Non-responder Predicted Responder Patients without biomarkers critical for drug sensitivity efficiently excluded + OncoSignature® CLASS 1 BM CLASS 2 BM CLASS 3 BM AI-DRIVEN

------

![Slide 11](acrv-ex99_2s11.jpg)

ap3 indication finding identifies endometrial cancer as sensitive to ACR-368 ACR-368 OncoSignature-based indication finding prior to trial entry Functional validation in preclinical models BM1 BM2 BM3 ~30% ~70% Clinical validation in ongoing Phase 2 study Endometrial patient tumor samples Predicted Responder Predicted Non-Responder

------

![Slide 12](acrv-ex99_2s12.jpg)

Acrivon CLIA LaboratoryStrengthening acrivon precision medicine capabilities Newly licensed CLIA laboratory Translates AP3-driven biomarker discoveries into actionable and proprietary CDx for our therapeutics Initially focused on ACR-368 OncoSignature testing Unique capabilities to support internal pipelines and new BD/partnering opportunities

------

![Slide 13](acrv-ex99_2s13.jpg)

BM-Stratified Cohorts with Prospective Response Prediction Subjects with high-grade EC ≤3 lines of prior therapy The ACR-368 OncoSignature™ is a tumor agnostic, functional Biomarker (BM) test designed to prospectively predict benefit from ACR-368 (prexasertib), a potent, selective CHK1/2 inhibitor. It is composed of 3 protein biomarkers that measure the tumor's addiction to CHK1/2-mediated DNA repair independent of genetic alterations. Screening with Acrivon's OncoSignature BM test across routine-processed (FFPE) human tumor types, predicted endometrial cancer (EC) to be particularly sensitive to ACR-368. Subjects relapsed after prior platinum-based chemotherapy and one prior line of anti-PD-(L)1 therapy Arm 1 (BM+) ACR-368 (105mg/m2 iv q14d) (N=71) Arm 2 (BM-) ACR-368 (105mg/m2 iv q14d) + ULDG\* sensitization (10mg/m2 iv q14d) (N=~150) Primary endpoint ORR: RECIST 1.1 \*ULDG = ultra low dose gemcitabine Exploratory Arm Study Rationale and initial trial Design Registrational intent

------

![Slide 14](acrv-ex99_2s14.jpg)

\* Best of BICR and/or PI # Unconfirmed PR Non QC'ed data based on EDC data extract as of 12/04/2025 # # ORR = 39% (95% CI, 24 - 56) n = 31 DCR: 80.6%, CBR (16 weeks): 61.3% BOR by RECIST 1.1 on study treatment\* Best overall response (BOR) DCR: Disease Control Rate (CR+PR+SD) CBR: Clinical Benefit Rate [(CR+PR)+(SD >16 weeks)] Significant Response in Arm 1 (BM+) ITT Population Treated with ACR-368

------

![Slide 15](acrv-ex99_2s15.jpg)

# # # n = 25 n = 35 ORR = 26% (95% CI, 14 - 42) ORR = 44% (95% CI, 27 - 63) Arm 1 (BM+) ACR-368 ARM 2 (BM-) ACR-368 + ULDG BOR by RECIST 1.1 on study treatment\* \* Best of BICR and/or PI # Unconfirmed PR Non QC'ed data based on EDC data extract as of 12/04/2025 Better ORR Observed in Subjects with ≤2 Prior lines of Therapy OncoSignature BM levels and the BM+ fraction were noted to be significantly higher in serous

------

![Slide 16](acrv-ex99_2s16.jpg)

# # # n = 23 n = 37 Serous (≤ 2 Prior Lines) Non-Serous (≤ 2 Prior Lines) ORR = 22% (95% CI, 11 - 37) ORR = 52% (95% CI, 33 - 71) DCR: 74%, CBR (16 weeks): 65% BOR by RECIST 1.1 on study treatment\* \* Best of BICR and/or PI # Unconfirmed PR Non QC'ed data based on EDC data extract as of 12/04/2025 Significant ORR in Serous All-Comer Population with ≤ 2 Prior Lines of Therapy

------

![Slide 17](acrv-ex99_2s17.jpg)

Screening Week 8 Week 12 Complete resolution of hepatic target lesions (-100%) (-100%) Deep, rapid responses in patients with aggressive serous endometrial tumors Screening Week 8 and 12 (-100%) Confirmed PR with complete disappearance of >10 additional hepatic metastases spanning both lobes ACR-368 single agent activity in multifocal hepatic disease, even in high-disease burden cases 67 y old patient with stage IV serous cancer, pMMR, p53-mutated; patient was refractory to last prior line, including anti-PD-1

------

![Slide 18](acrv-ex99_2s18.jpg)

Serous endometrial cancer - a significant unmet need Disproportionate Mortality Accounts for ~40-50% of all endometrial cancer deaths.5 Limited Effective Treatment Options Only moderate benefit from immunotherapy Chemotherapy responses short-lived. Rapid resistance, early recurrence. HER2-targeting benefits smaller proportion, no TP53-directed therapies Almost all serous patients progress to ≥2nd line of therapy SOC in ≥2nd line post-IO/platinum ~15% ORR and ~3.4 months PFS (single agent chemotherapy)5, 6 Serous EC is characterized by high-grade aplasia and aggressive histological features Nakayama, K.; Nakayama, N.; Ishikawa, M.; Miyazaki, K. Cancers 2012, 4, 799-807. 1SEER database 2https://pmc.ncbi.nlm.nih.gov/articles/PMC9445918 3Concin, C. et al, ESGO–ESTRO–ESP 2025 Guidelines; Lian Y., Luo P. Annals of Global Health (2025). 4Based on internal estimates of approximately 2.4% serous in the prevalence pool given survival approximations 5Bogani et al, Gynecol Oncol. 2021 July ; 162(1): 226–234. doi:10.1016/j.ygyno.2021.04.029. 6Makker et al, NEJM; 2022; 386:437-48 7KOL estimates EC Mortality (US + EU) = ~44K1, 3 Serous EC Mortality 40-50% ~18-22K/year2, 3,7 EC Prevalence ~2.4M patients1, 3 ~58,800 serous EC4

------

![Slide 19](acrv-ex99_2s19.jpg)

Treatment-Related Adverse Events N = number of subjects (%) Arm 1 (ACR-368) N=40 Grades 3/4 Arm 2 (ACR-368 + ULDG) N=48 Grades 3/4 Thrombocytopenia 9 (22) 17 (34) Anemia 11 (27) 22 (46) Leukopenia 6 (15) 11 (23) Neutropenia 10 (25) 16 (33) Febrile neutropenia 2 (5) 4 (8) Acute kidney injury 2 (5) 0 TRAEs with Grades 3/4 percentages ≥5% for either group are included in this table. No fatal TRAE in either group. G-CSF is encouraged for ACR-368 monotherapy and mandated for ACR-368 + ULDG Limited, transient, mechanism-based hematological AEs Notable Absence of GI toxicities, ILDs, stomatitis, ocular toxicity, peripheral neuropathy, etc. Data-cut of 01/13/2026 Favorable safety profile

------

![Slide 20](acrv-ex99_2s20.jpg)

Endometrial patient Demographics and baseline characteristics Subject Demographics BM+ N = 40 BM- N = 48 Median Age (range) 66.0 (40, 77) 66.0 (49, 80) Race, n (%) White 29 (72.5) 29 (60.4) Black/African American 6 (15) 10 (20.8) Asian 1 (2.5) 4 (8.3) American Indian or Alaska Native 0 0 Native Hawaiian or other pacific islander 1 (2.5) 0 Other/Unknown 3 (7.5) 5 (10.4) Stage, n (%) III 10 (25) 18 (37.5) IV 30 (75) 29 (60.4) Unknown 0 1 (2.1) Histology, n (%) Serous 20 (50) 16 (33.3) Clear-cell carcinoma 2 (5) 4 (8.3) Carcinosarcoma 6 (15) 10 (20.8) Endometroid, G3 9 (22.5) 15 (31.3) Other 3 (7.5) 3 (6.3) ECOG Status at Baseline, n (%) 0 20 (50) 25 (52) 1 20 (50) 23 (48) Subject Demographics BM+ N = 40 BM- N = 48 Prior Lines of Therapy, Median (Mean) 2 (2) 2 (2) Best Overall Response to Last Prior Line Refractory 9 (22.5) 15 (31.3) Relapsed disease 31 (77.5) 33 (68.7) Unknown 0 (0) 0 (0) MMR Status, n (%) pMMR 28 (70) 29 (60.4) dMMR 1 (2.5) 6 (12.5) Unknown 11 (27.5) 13 (27.1) TP53 Status, n (%) Mutant 24 (60) 15 (31.3) Wildtype 6 (15) 11 (22.9) Unknown 10 (25) 22 (45.8) Prior exposure to PD-1/PD-L1, n (%) Yes 39 (97.5) 46 (95.8) No 1 (2.5) 2 (4.2) Prior exposure to Pembro/Len, n (%) Yes 19 (47.5) 20 (41.7) No 21 (52.5) 28 (58.3) Non QC'ed data based on EDC data extract as of 01/13/2026

------

![Slide 21](acrv-ex99_2s21.jpg)

Subjects relapsed after prior platinum-based chemotherapy and one prior line of anti-PD-(L)1 therapy Arm 1 BM+ N=71 ACR-368 Arm 2 BM- N= up to ~150 ACR-368 with ULDG sensitization Biopsy-Independent Serous Cohorts (US + EU) Subjects with ≤2 lines of prior therapy Arm 3 Serous All-Comer N= up to ~90 ACR-368 w/ ULDG sensitization Enrollment completion Q4 2026 BM-Stratified Cohorts with Prospective Response Prediction (US only) Subjects with ≤3 lines of prior therapy Primary endpoint ORR by RECIST 1.1 Primary endpoint ORR by RECIST 1.1 Exploratory Arm Arm 4 Serous All-Comer N= up to ~90 ACR-368 Monotherapy ACR-368 program focused exclusively on registrational intent opportunities ✓ Arms 1, 3, and 4 are registrational intent Primary endpoint ORR by RECIST 1.1 Serous EC shows particularly high ORR in both BM+ and BM- tumors ACR-368 has a favorable safety profile Arm 3 and Arm 4 are evaluating ACR-368 + ULDG and ACR-368, respectively, in serous EC all-comer (biopsy-independent) subjects The study is being expanded to >20 EU sites Completed

------

![Slide 22](acrv-ex99_2s22.jpg)

Potent synergy of ACR-368 with anti-PD-L1 displays immune Memory in 100% of Mice Complete tumor regression Immune memory Immune memory independent of CD8 Immune memory independent of CD4 Immune memory Co-mediated by CD4 + CD8 Legends:

------

![Slide 23](acrv-ex99_2s23.jpg)

Development path for ACR-368 in endometrial cancer Registrational intent Phase 2 single arm study of ACR-368 monotherapy in all BM+ EC patients All endometrial subtypes Enrollment completion (N =71 BM+ subjects) anticipated 2027 Registrational intent Phase 2 single arm study of ACR-368 with ULDG as sensitizer in all-comer serous EC (no biopsy requirement) Enrollment completion (N ~90 subjects) anticipated Q4 2026 Alignment with the FDA that ULDG (10 mg/m2) has no activity of its own Registrational intent Phase 2 single arm study of monotherapy ACR-368 in all-comer serous EC (no biopsy requirement) Planned confirmatory Phase 3 trial - front-line switch maintenance in pMMR population Randomization anti-PD-1 vs [anti-PD-1 + ACR-368] post [C/P + anti-PD-1] Protocol submitted to the FDA November 12, 2025

------

![Slide 24](acrv-ex99_2s24.jpg)

ACR-368 + Anti PD-1 confirmatory phase 3 trial Placebo Carboplatin AUC 5 mg/mL/min Paclitaxel 175 mg/m2 Q3W for 6 cycles ACR-368 Q2W plus Anti PD-1 Q6W Placebo plus Anti PD-1 Q6W Follow- up R1:1 Eligible patients Subjects with advanced stage (III, IVA, or IVB) or recurrent pMMR EC with measurable disease, all histopathologies eligible. Subjects must have completed at least 4 cycles of chemo + anti-PD-1 ≥6 weeks before first dose of study treatment ECOG PS 0-1 Adequate organ function Co-primary endpoints (hierarchical testing) PFS OS Planned Phase 2 safety run-in transitioning into Phase 3 Randomized, double-blinded, multicenter study of ACR-368 plus anti PD-1 versus placebo plus anti PD-1 in the ICI maintenance phase for patients with MMRp, primary advanced or recurrent EC

------

![Slide 25](acrv-ex99_2s25.jpg)

Monotherapy ULDG Sensitization PD1 Combination PD1/VEGF Bispecific Combination ADC Combination Endometrial MDS/MPN, HPV+ SCC, H&N, GBM Future Indications Initial Focus Broad Indication and Combination Expansion Opportunities acr-368 offers multiple attractive opportunities ACR-368-201 Arm 1 Biomarker-Positive All histopathologies Arm 4 Serous all-comer ACR-368-201 Arm 3 Biomarker Unselected Serous all-comer Confirmatory Phase 3 Expansion Opportunities

------

![Slide 26](acrv-ex99_2s26.jpg)

Internal pipeline: AP3-based drug discovery potential first- and best in class candidates Streamlined AP3-based drug discovery AP3 used for biologically relevant selectivity profiling ACR-6840: Development candidate, novel CDK11 inhibitor Anticipated IND filing Q4 2026 Multiple equally promising back-up series being pursued in parallel ACR-2316: Clinical stage, novel WEE1/PKMYT1 inhibitor Additional clinical data and transition to dose expansion 2026 Additional AP3-based internal programs

------

![Slide 27](acrv-ex99_2s27.jpg)

Wee1 and PKMYT1 - critical cell cycle checkpoints in human cancer WEE1 and PKMYT1 regulate S and G2-M cell cycle checkpoints to ensure proper DNA replication and mitotic completion Defective DNA repair is highly prevalent in cancers, creating a dependency on checkpoint proteins Demonstrated clinical activity, but the Therapeutic Index has been challenging AP3 was applied to design a molecule with potent single agent activity and exquisite selectivity to achieve expanded Therapeutic Index

------

![Slide 28](acrv-ex99_2s28.jpg)

Acr-2316 is a potentially best- and first-in-class agent designed using Acrivon's ap3 platform Program Goals Demonstrated Results Superior single agent activity High selectivity and potency Streamlined clinical development Favorable ADME-PK, Therapeutic Index, and tolerability profile Broad preclinical therapeutic index and anti-tumor activity across all dosing regimens 5-20-fold more potent\* in preclinical models than clinical benchmarks; complete tumor regression Potent tumor cell killing\*, short elim.T1/2; only transient AEs Superior anti-tumor activity\* (robust CDK1, CDK2, and PLK1 activation; inhibition of PKMYT1 resistance) AP3-Enabled SAR AP3-based Indication Finding 1 2 3 4 \*Head-to-head preclinical studies against benchmarks with clinical data AP3 MS-based PD assay developed for human PBMCs Clinical activity observed in AP3-predicted solid tumor types, including endometrial, SCLC, and sqNSCLC Advanced from lead to oral dosing in clinic in ≤15 month Two weekly oral dosing regimens established

------

![Slide 29](acrv-ex99_2s29.jpg)

ACR-2316 is highly potent across human tumor cell lines and patient-derived ex vivo tumor models Patient-derived ex vivo ovarian tumor models Human tumor cell lines (not genetically selected) Breast Lung Ovarian Prostate Renal Medulloblastoma Glioblastoma Pancreatic WEE1i PKMYT1i

------

![Slide 30](acrv-ex99_2s30.jpg)

SUPERIOR ACTIVITY OF ACR-2316 oVER WRN INHIBITORS IN BOTH MSI HIGH AND MSS CELL LINES HRO761 is a noncovalent allosteric inhibitor of WRN (Novartis); VVD-133214/ RO7589831 is a covalent allosteric WRN inhibitor (Roche); ACR-2316 is more potent than both WRN inhibitors even in the optimal MSI high context, associated with strong dependency on WRN activity

------

![Slide 31](acrv-ex99_2s31.jpg)

ACR-2316 induces complete tumor regression across models and dosing regimens 5d on/2 d off Model 1 5d on/2 d off Model 2

------

![Slide 32](acrv-ex99_2s32.jpg)

Phase 1 Dose Escalation and Expansion Design Cohort A 3on/4off Cohort B 2on/5off Dose Level 1 Dose Level 2 Select tumor types Dose Escalation 30 mg 200 mg 240 mg 120 mg 60 mg 240 mg Cohort C 2on/12off 360 mg TBD 280 mg 160 mg Dose Expansion ✅ ✅ Two weekly oral regimens (3d on/4d off and 2d on/5d off) established with encouraging tolerability profile (N = 33) Bi-weekly (2d on/12d off) oral regimen being established based on ACR-2316 mechanism of action and limited, transient heme AEs Ongoing

------

![Slide 33](acrv-ex99_2s33.jpg)

ACR-2316 shows promising clinical activity in lung cancer during dose escalation Non-QC'ed EDC data extract 3/3/2026 Two weekly oral dosing schedules established; Clinical activity observed at ≥120 mg DCR (Target lesion) across all tumor types 79% Initial clinical activity and DCR (6/7) observed in lung cancer (median 3 prior lines therapy, incl. ICI and chemo) adNSCLC-03 sqNSCLC-02 adNSCLC-01 adNSCLC-02 SqNSCLC-01 SCLC-02 SCLC-01 On treatment SCLC Sq. NSCLC Ad. NSCLC

------

![Slide 34](acrv-ex99_2s34.jpg)

Favorable tolerability profile summary of ≥ grade 3 TRAEs # Subjects; % Total Gr. 3 N=20 Total Gr. 4 N=20 Total Gr 3/4 N=20 Neutropenia/neutrophil count decreased 4; 20% 1; 5% 5 25% Leukopenia/white blood cell count decreased 1; 5% 1; 5% 2; 10% Anaemia 1; 5% 0 1; 5% Lymphocyte count decreased 0 0 0 Alanine aminotransferase increased 1; 5% 0 1; 5% TOTAL 6 1 7 Non QC'ed EDC extract 2/23/2026 TRAEs with Grades 3/4 percentages ≥5% are included. No fatal TRAEs. Patients counted once at the maximum grade TRAEs in subjects treated up to or at established weekly dosing regimens Transient, mechanism-based hematological AEs, primarily neutropenia No other types of toxicities observed above (N = 13) tolerated weekly doses Notable absence of GI toxicities, long-lasting myelosuppression or more severe non-hematological AEs commonly seen with ADCs and chemotherapy

------

![Slide 35](acrv-ex99_2s35.jpg)

Demographics AND BASELINE CHARACTERISTICS Non QC'ed data based on EDC data extract as of 12/22/2025 Subject Demographics N = 33 ECOG Status at Baseline, n (%) 0 10 (30) 1 23(70) Prior Lines of Therapy, n (%) 1 1 (3) 2 5 (15) 3 14 (42) 4 7 (21) 5 2 (6) 6 2 (6) 7 1(3) 8 1(3) Prior exposure to IO therapy, n (%) Yes 24 (73) No 9 (27) Subject Demographics N = 33 Median Age (range) 63 Race, n (%) White 26 (79) Black/African American 3 (9) Asian 1 (3) Native Hawaiian/Pacific Islander 1 (3) Unknown/Other 2 (6) Sex, n (%) Female 20 (61) Male 13 (39) Cancer Type, n (%) Bladder 1 (3) Breast 4 (12) Cervical 1(3) Colorectal 3 (9) Endometrial 5 (15) Head Neck Squamous Cell Carcinomas 3 (9) Small Cell Lung Cancer 2 (6) Squamous - Non Small Cell Lung Cancer 3 (9) Adenocarcinoma - Non Small Cell Lung Cancer 3 (9) Ovarian Carcinoma 4 (12) Pancreatic Cancer 2 (6) Prostate Cancer (Neuroendocrine) 2 (6)

------

![Slide 36](acrv-ex99_2s36.jpg)

Potent synergy of ACR-2316 with anti-PD-L1 displays immune Memory in 100% of Mice Legends: Complete tumor regression Immune memory Immune memory independent of CD8 Immune memory independent of CD4 Immune memory co-mediated by CD4 + CD8

------

![Slide 37](acrv-ex99_2s37.jpg)

Potential development paths for ACR-2316 AP3-predicted solid tumor types of high unmet need, e.g. SCLC, sqNSCLC, HPV+ tumors, etc. Single agent 2nd/3rd line Chemo combination (DDR stress sensitization in earlier lines) Weekly and bi-weekly dosing regimens provide flexibility for combinations, including potential frontline with both anti-PD(L)1 and TOPO1 payload ADCs (both strong synergy with ACR-2316) ACR-2316 + anti-PD-L1 therapy results in complete regression and permanent CD4 + CD8-mediated immune memory in preclinical models ACR-2316 + TOPO1 isomerase inhibitors (main backbone in ADCs) shows strong synergy in preclinical models Max synergy score = 34 Strong synergy with IO Potential for strong synergy with ADCs

------

![Slide 38](acrv-ex99_2s38.jpg)

New preclinical cell cycle development candidateACR-6840: potential first-in-class CDK11 inhibitor No clinical-stage competitors Attractive cancer cell cycle drug target, well-suited for AP3 platform, multiple protein isoforms Broad role in cell cycle control and oncogenesis; CDK11 controls transcription, pre-mRNA processing and splicing of mitotic genes, and is encoded by an essential gene for cancer cell viability (DepMap) AP3 profiling (benchmarks/leads) for MOA-based SAR and lead optimization Development candidate: ACR-6840 Small molecule CDK11 inhibitor, highly selective (kinome scan), orally available, potent (3 nM cellular target engagement; ~30 nM EC50 viability), preclinical antitumor activity Several equally promising back-up series Series D Resol. : 2.64 Å Series C Resol. : 2.4 Å AP3-based screening funnel guides intracellular protein SAR Series E Resol. : 2.69 Å All AP3-driven programs deploy co-crystallography

------

![Slide 39](acrv-ex99_2s39.jpg)

AP3 Generative phosphoproteomics platform Structured Standardized AI-enabled AP3 Interactome AP3 KSR Predictor AP3 Data Portal AP3 Chatbot Proprietary Database Drug design and optimization Target ID / Indication Finding MoA / response prediction PD and predictive biomarkers MS-proteomics Functional Genomics Internal Multi-modal AP3 MS-proteomics Single cell p-proteomics Spatial p-proteomics Clinical p-proteomics Proprietary Public Proprietary Computational Pipeline Validate Design Insight

------

![Slide 40](acrv-ex99_2s40.jpg)

Data completeness Peptide IDs CV Pearson Correlation PCA Hierarchical Clustering DEPs Volcano Plots ANOVA Hierarchical clustering Consensus Sequence Motif Kinase Inference Pathway Enrichment Network Mapping Biomarkers Machine-Learning Filtering Batch effects Normalization Imputation ~164,000 phosphosites ~50,000 phosphosites Ap3 interactome: Proprietary Interactive Data analysis infrastructure for all Acrivon data and experiments Actionable data across all AP3 experiments accessible for all Acrivon scientists Fully scripted, algorithm-based machine learning-enabled pathway and biomarker analyses

------

![Slide 41](acrv-ex99_2s41.jpg)

AP3 reveals drug-regulated kinase activity in intact cells not detectable by standard methods Time : 60 minutes Dose : 20 nM KinomeScan @ 1mM ACR-2316 Drug-regulated kinase activity\* in intact cells ACR-2743 (previous lead candidate) \*Kinase activity based on substrate motif analysis using a proprietary PTM-SEA hybrid method ACR-2316 ACR-2743 MAPK3K4 PRKCE GAK PKMYT1 PLK1 PLK2 WEE2 PLK3 WEE1 YSK4 Traditional selectivity profiling AP3-based pathway profiling

------

![Slide 42](acrv-ex99_2s42.jpg)

AP3 Reciprocal quenching identifies PKMYT1 as a key wee1 inhibitor-induced resistance mechanism Induced Suppressed Enrichment Score (NES) 500 5 Protein set size Mitotic regulation Cell cycle and cancer DNA homology repair DNA damage responses Sensitive Resistant WEE1i PKMYT1i PKMYT1i WEE1i PUJANA_BRCA1_PCC_NETWORK PUJANA_CHEK2_PCC_NETWORK REACTOME_CELL_CYCLE REACTOME_SEPARATION_OF_SISTER_CHROMATIDS Protein set name EC75 Comprehensive annotation, weighted for protein set size

------

![Slide 43](acrv-ex99_2s43.jpg)

AP3 reciprocal quenching reveals optimal target potency profile for dual WEE1/PKMYT1 inhibitor PKMYT1i WEE1i PKMYT1i WEE1i Sensitive Resistant HCL, Euclidean 1043 p-sites from 298 proteins 4 -4 Centered log2FC (treated vs. DMSO) Target substrate of ACR-368 Target substrate of PKMYT1i Optimal potency ratio results in significant synergy WEE1i and ACR-368 WEE1i and PKMYT1i dual inhibition synergy Sensitive Resistant Target substrates Target substrates PKMYT1i WEE1i PKMYT1i WEE1i

------

![Slide 44](acrv-ex99_2s44.jpg)

Acr-2316 induces potent activation of pro-apoptotic mitotic kinases in sensitive tumor cells Robust activation of CDK1with ACR-2316 exemplified by enrichment of 206 upregulated substrates of CDK1 ACR-2316 @60min and 200nM in ACHN

------

![Slide 45](acrv-ex99_2s45.jpg)

Robust potent inhibition of CDK1 consensus substrate Y15 by ACR-2316 AP3 interactome enables real time quantitative computational analyses of proprietary AP3 drug profiling data across different conditions and experiments Comparison @60min and 200nM in ACHN Time-dependent comparison @ 200nM in ACHN Dose-dependent comparison @ 60min in ACHN ACR-2316 ACR-2316 3 -3 log2FC 3 -3 log2FC 3 -3 log2FC

------

![Slide 46](acrv-ex99_2s46.jpg)

AACR 2025: Generative Phosphoproteomics AP3 uncovers robust tumor cell death through cdk1, cdk2, and plk1 Poster link here

------

![Slide 47](acrv-ex99_2s47.jpg)

data driven execution and value creation Recent Accomplishments (Last 12 Months) Anticipated Next Milestones (2026) Continued positive ACR-368 data in ongoing registrational intent EC trial (April 2025 and January 2026 Corporate R&D Events) Two weekly oral dosing regimens for ACR-2316; promising clinical activity observed in AP3-prioritized tumor types, including lung cancer (Q3-4 2025) 4 presentations showcasing expanded AP3 capabilities and compelling ACR-2316 preclinical data (AACR Q2 2025 and AACR-NCI-EORTC Q4 2025) Achieve CTA approval in EU for the ongoing (US) registrational intent serous EC all-comer Arm 3 (ACR-368 + ULDG) by Q1 2026 Initial clinical data from Arm 3 and additional update on Arm 1 of the ACR-368 Phase 2b trial in mid-2026 Initiate enrollment for the registrational intent serous EC all-comer Arm 4 (ACR-368) in the US in first half of 2026 Achieve readiness for Phase 3 confirmatory trial for ACR-368 in combination with PD-1 therapy by mid-2026 Complete enrollment (up to N = 90 subjects) in the registrational intent serous EC all-comer Arm 3 (ACR-368 + ULDG) in Q4 2026 Additional ACR-2316 Phase 1 clinical data for weekly and bi-weekly dosing regimens and transition into dose expansion in AP3-identified tumor types in 2026 Submit IND filing to the FDA for ACR-6840 in Q4 2026 Initiate additional internal programs utilizing the AP3 platform in 2026 Development candidate nomination for ACR-6840, a potential first-in-class CDK11 inhibitor (Q4 2025) Initiation of additional registrational intent serous EC all-comer (biopsy independent) Arm 3 in ongoing Phase 2b trial (Q4 2025) Strong enthusiasm for promising ACR-368 clinical data at 2026 ESGO late breaking oral presentation and corporate live KOL expert panel (Q1 2026) cORR of 52% observed in serous EC, a high unmet need disease w/ limited treatment options contributing to ~50% of all EC mortality

------

![Slide 48](acrv-ex99_2s48.jpg)

FINANCIAL HIGHLIGHTS Approximate Cash and Investments $118.6M Projected runway intoQ2 2027 Approximate Fully Diluted Shares Outstanding 45.1M Current operating plan, assuming no additional financing Balance sheet 31-Dec-2025 Shares, pre-funded warrants, and equity grants outstanding 31-Dec-2025 Note: Unaudited