Form 8-K
8-K — Aktis Oncology, Inc.
Accession: 0001193125-26-132524
Filed: 2026-03-31
Period: 2026-03-30
CIK: 0002035832
SIC: 2834 (PHARMACEUTICAL PREPARATIONS)
Item: Results of Operations and Financial Condition
Item: Financial Statements and Exhibits
Documents
8-K — ck0002035832-20260330.htm (Primary)
EX-99.1 (ck0002035832-ex99_1.htm)
XML — IDEA: XBRL DOCUMENT (R1.htm)
8-K
8-K (Primary)
Filename: ck0002035832-20260330.htm · Sequence: 1
8-K
0002035832false00020358322026-03-302026-03-30
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 30, 2026
Aktis Oncology, Inc.
(Exact name of registrant as specified in its charter)
Delaware
001-43047
85-2584233
(State or other jurisdiction
of incorporation)
(Commission
File Number)
(IRS Employer
Identification No.)
17 Drydock Avenue, Suite 17-401
Boston, Massachusetts 02210
(Address of principal executive offices) (Zip Code)
Registrant’s telephone number, including area code: (617) 461-4023
N/A
(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:
Title of each class
Trading
Symbol(s)
Name of each exchange
on which registered
Common Stock, par value $0.0001
per share
AKTS
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 30, 2026, Aktis Oncology, Inc. issued a press release announcing its financial results for the year ended December 31, 2025 and provided a business update. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.
The information contained in Item 2.02 of this Current Report on Form 8-K (including Exhibit 99.1 hereto) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly provided by specific reference in such a filing.
Item 9.01.
Financial Statements and Exhibits.
(d) Exhibits.
Exhibit
No.
Description
99.1*
Press Release, dated March 30, 2026
104
Cover Page Interactive Data File (embedded within the Inline XBRL document).
* Furnished herewith
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.
AKTIS ONCOLOGY, INC.
Date: March 30, 2026
By:
/s/ Kyle Kuvalanka
Kyle Kuvalanka
Chief Financial Officer
EX-99.1
EX-99.1
Filename: ck0002035832-ex99_1.htm · Sequence: 2
EX-99.1
Exhibit 99.1
Aktis Oncology Announces FDA Clearance of Investigational New Drug Applications for AKY-2519 and Provides Business Updates and Full Year 2025 Financial Results
•
Progressing vision to expand the reach of targeted radiopharmaceuticals to large patient populations
•
Anticipating multiple milestones in the next 12 months, including initiation of Phase 1b clinical trial of AKY-2519 in mid-2026
BOSTON, March 30, 2026 (GLOBE NEWSWIRE) -- Aktis Oncology, Inc. (NASDAQ:AKTS) (the “Company”), a clinical-stage oncology company focused on expanding the breakthrough potential of targeted radiopharmaceuticals to large populations, including those not addressed by existing platform technologies, today announced the U.S. Food and Drug Administration (FDA) cleared the Investigational New Drug (IND) applications for the Company to proceed to a Phase 1b clinical trial with AKY-25191. AKY-2519 is a miniprotein radioconjugate targeting B7-H3, which is expressed in several solid tumor types including prostate and lung cancers, and is the second clinical stage miniprotein radioconjugate discovered using Aktis’ proprietary platform. The Company’s lead miniprotein radioconjugate, AKY-1189, targeting Nectin-4, is currently enrolling patients in a Phase 1b clinical study. Aktis’ miniprotein radioconjugates are designed to selectively deliver actinium-225 (225Ac), a highly potent alpha-emitting radioisotope, to target-expressing tumors. The Company also provided business updates and reported financial results for the year ended December 31, 2025.
“Aktis was founded to improve outcomes for cancer patients by pioneering a new class of targeted radiopharmaceuticals for prevalent tumor types that have historically been beyond the reach of this modality,” said Matthew Roden, Ph.D., President and Chief Executive Officer of Aktis Oncology. “We continue to make significant progress on all fronts of our plan, including advancing the enrollment of our Phase 1b clinical trial of AKY-1189 in patients with Nectin-4 expressing tumors, which was granted FDA Fast Track designation in February, as well as the recent clearance of our IND applications for AKY-2519. We are excited to accelerate the AKY-2519 program to patients in need of improved treatment options, and now expect to commence a Phase 1b trial of AKY-2519 in mid-2026. This momentum, together with our proprietary miniprotein radioconjugate platform, supply chain infrastructure, and strong cash position, strengthens our leadership in targeted radiopharmaceuticals.”
Dr. Roden continued, “AKY-1189 and AKY-2519 each represent significant patient impact opportunities, with the potential to address multiple indications across various tumor types. We are working urgently to generate the clinical data necessary to support registrational trials for both programs.”
1 IND applications were cleared for [64Cu]Cu-AKY-2519 for imaging and [225Ac]Ac-AKY-2519 for therapeutic use.
Business updates and anticipated key milestones
Pipeline
AKY-1189, a novel miniprotein radioconjugate designed to selectively deliver 225Ac to Nectin-4 expressing tumors, is in an ongoing Phase 1b clinical trial enrolling patients with locally advanced or metastatic urothelial cancer (mUC), breast cancer, non-small cell lung cancer, colorectal cancer, cervical cancer, and head and neck cancer.
In February 2026, the FDA granted Fast Track designation for AKY-1189 for the treatment of adult patients with locally advanced or mUC who have progressed on or after prior systemic therapies.
AKY-2519, a miniprotein radioconjugate designed to selectively deliver 225Ac to B7-H3 expressing tumors, including prostate, lung and other solid tumors, is in an ongoing imaging and dosimetry clinical assessment of AKY-2519 to enable initial understanding of biodistribution and uptake in tumors and normal tissues.
In March 2026, the FDA cleared the IND applications for [64Cu]Cu-AKY-2519 (imaging) and [225Ac]Ac-AKY-2519 (therapeutic use) to proceed to a Phase 1b clinical trial.
Corporate
On January 8, 2026, the Company priced an initial public offering (IPO) of its common stock, raising $365.4M gross proceeds, before underwriting discounts and other offering-related expenses.
Anticipated key milestones for the next 12 months
•
AKY-1189: Preliminary data from Part 1 of the ongoing Phase 1b clinical trial are expected in the first quarter of 2027.
•
AKY-2519:
-
Results from clinical imaging and dosimetry assessment of AKY-2519 in patients with various solid tumors are expected in mid-2026.
-
Phase 1b clinical trial is expected to commence in mid-2026. The Company plans to provide further details on the overall clinical development strategy of AKY-2519 at that time.
•
Early pipeline: Two programs are tracking toward development candidate nomination and commencement of IND-enabling activities in the first quarter of 2027.
•
Corporate: In-house Good Manufacturing Practices (GMP) facility is expected to be operational in the second half of 2026 as part of the Company’s hybrid manufacturing strategy to expand capabilities and support clinical supply demand.
2
2025 financial results
•
Cash position: Cash, cash equivalents and marketable securities were $226.8 million as of December 31, 2025, compared to $297.2 million as of December 31, 2024. Subsequent to December 31, 2025, the Company completed its IPO, generating net proceeds of approximately $335.3 million, after underwriting discounts, commissions and offering-related expenses. As a result, the Company’s pro forma as adjusted cash position as of year-end 2025 was $562.1 million, reflecting cash, cash equivalents and marketable securities as of December 31, 2025, plus net proceeds from the January 2026 IPO. The Company believes that the pro forma as adjusted cash position will fund its operations into 2029.
•
Collaboration revenue: Collaboration revenue was $6.5 million for the year ended December 31, 2025, compared to $1.5 million for the year ended December 31, 2024. The increase was attributable to revenue recognized under the Company’s collaboration with Eli Lilly and Company, which was entered into in May 2024. In 2024, revenue recognition began in the fourth quarter, whereas a full year of revenue was recognized in 2025.
•
R&D expenses: Research and development expenses were $67.5 million for the year ended December 31, 2025, compared to $41.0 million for the year ended December 31, 2024. The increase was primarily driven by higher headcount, and increased program expenses to support the advancement of AKY-1189 in a Phase 1b clinical trial and AKY-2519 IND-enabling studies and clinical imaging and dosimetry assessment.
•
G&A expenses: General and administrative expenses were $13.7 million for the year ended December 31, 2025, compared to $12.6 million for the year ended December 31, 2024. The increase was primarily due to higher headcount to support the Company’s growing business.
•
Net loss: Net loss was $63.7 million for the year ended December 31, 2025, compared to $44.0 million for the year ended December 31, 2024. The increase in net loss was primarily driven by the increase in R&D expenses described above.
About Aktis’ miniprotein radioconjugate platform
Aktis has developed a proprietary, isotope-agnostic miniprotein radioconjugate platform to selectively deliver the tumor-killing properties of radioisotopes to targeted tumors. Aktis’ therapeutic miniprotein radioconjugates are designed to maximize anti-cancer activity through high tumor penetration coupled with internalization and retention in cancer cells, while rapidly clearing from normal organs and tissues. The Aktis platform further enables clinicians to visualize and verify target engagement with imaging isotopes prior to exposure to therapeutic radioisotopes. Leveraging this platform, Aktis is advancing a pipeline of next-generation targeted radiopharmaceuticals to address the unmet needs of patients across a broad spectrum of solid tumors.
About Aktis Oncology
Aktis Oncology, Inc. is a clinical-stage oncology company focused on expanding the breakthrough potential of targeted radiopharmaceuticals to large patient populations, including those not addressed by existing platform technologies. Aktis’ most advanced pipeline program, AKY-1189, is a miniprotein radioconjugate targeting Nectin-4, with multi-indication potential across multiple tumor types, including
3
locally advanced or metastatic urothelial cancer, breast cancer, non-small cell lung cancer, colorectal cancer, cervical cancer, and head and neck cancer. Aktis’ second pipeline program, AKY-2519, is a miniprotein radioconjugate targeting B7-H3 expressing tumors, including prostate, lung and other solid tumors. Aktis has a strategic collaboration with Eli Lilly and Company to leverage its miniprotein platform to develop novel radioconjugates outside of Aktis’ proprietary pipeline. For more information, please visit www.aktisoncology.com.
Forward-looking statements
This press release contains forward looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, including statements regarding the Company’s expectations about the timing of ongoing and planned clinical trials and regulatory filings, goals to develop and commercialize its product candidates, its liquidity and capital resources, and other statements identified by words such as “could,” “expects,” “intends,” “may,” “plans,” “potential,” “should,” “will,” “would,” or similar expressions and the negatives of those terms. Forward looking statements are not promises or guarantees of future performance, and are subject to a variety of risks and uncertainties, many of which are beyond the Company’s control, and which could cause actual results to differ materially from those contemplated in such forward-looking statements. These factors include risks related to the Company’s limited operating history, its ability to obtain necessary funding, its ability to generate positive clinical trial results for its product candidates and other risks inherent in clinical development, the timing and scope of regulatory approvals, changes in laws and regulations to which the Company is subject, competitive pressures, its ability to identify additional product candidates, risks relating to business interruptions, and other risks set forth under the heading “Risk Factors” of the Company’s Annual Report on Form 10-K for the year ended December 31, 2025 and in subsequent filings with the Securities and Exchange Commission. The Company’s actual results could differ materially from the results described in or implied by such forward looking statements. Forward-looking statements speak only as of the date hereof, and, except as required by law, the Company undertakes no obligation to update or revise these forward-looking statements.
Media contact:
Melone Communications, LLC
Liz Melone
617-256-6622
liz@melonecomm.com
Investor contact:
Precision AQ
Alex Lobo
212-698-8802
Alex.lobo@precisionaq.com
4
XML — IDEA: XBRL DOCUMENT
XML
Filename: R1.htm · Sequence: 5
v3.26.1
Document and Entity Information
Mar. 30, 2026
Cover [Abstract]
Document Type
8-K
Document Period End Date
Mar. 30, 2026
Entity Registrant Name
Aktis Oncology, Inc.
Entity Incorporation State Country Code
DE
Entity File Number
001-43047
Entity Tax Identification Number
85-2584233
Entity Address Address Line 1
17 Drydock Avenue
Entity Address Address Line 2
Suite 17-401
Entity Address City Or Town
Boston
Entity Address State Or Province
MA
Entity Address Postal Zip Code
02210
City Area Code
617
Local Phone Number
461-4023
Written Communications
false
Soliciting Material
false
Pre Commencement Tender Offer
false
Pre Commencement Issuer Tender Offer
false
Security 12b Title
Common Stock, par value $0.0001per share
Trading Symbol
AKTS
Security Exchange Name
NASDAQ
Entity Emerging Growth Company
true
Entity Ex Transition Period
false
Amendment Flag
false
Entity Central Index Key
0002035832
X
- Definition
Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.
+ References
No definition available.
+ Details
Name:
dei_AmendmentFlag
Namespace Prefix:
dei_
Data Type:
xbrli:booleanItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Area code of city
+ References
No definition available.
+ Details
Name:
dei_CityAreaCode
Namespace Prefix:
dei_
Data Type:
xbrli:normalizedStringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Cover page.
+ References
No definition available.
+ Details
Name:
dei_CoverAbstract
Namespace Prefix:
dei_
Data Type:
xbrli:stringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.
+ References
No definition available.
+ Details
Name:
dei_DocumentPeriodEndDate
Namespace Prefix:
dei_
Data Type:
xbrli:dateItemType
Balance Type:
na
Period Type:
duration
X
- Definition
The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.
+ References
No definition available.
+ Details
Name:
dei_DocumentType
Namespace Prefix:
dei_
Data Type:
dei:submissionTypeItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Address Line 1 such as Attn, Building Name, Street Name
+ References
No definition available.
+ Details
Name:
dei_EntityAddressAddressLine1
Namespace Prefix:
dei_
Data Type:
xbrli:normalizedStringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Address Line 2 such as Street or Suite number
+ References
No definition available.
+ Details
Name:
dei_EntityAddressAddressLine2
Namespace Prefix:
dei_
Data Type:
xbrli:normalizedStringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Name of the City or Town
+ References
No definition available.
+ Details
Name:
dei_EntityAddressCityOrTown
Namespace Prefix:
dei_
Data Type:
xbrli:normalizedStringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Code for the postal or zip code
+ References
No definition available.
+ Details
Name:
dei_EntityAddressPostalZipCode
Namespace Prefix:
dei_
Data Type:
xbrli:normalizedStringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Name of the state or province.
+ References
No definition available.
+ Details
Name:
dei_EntityAddressStateOrProvince
Namespace Prefix:
dei_
Data Type:
dei:stateOrProvinceItemType
Balance Type:
na
Period Type:
duration
X
- Definition
A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b-2
+ Details
Name:
dei_EntityCentralIndexKey
Namespace Prefix:
dei_
Data Type:
dei:centralIndexKeyItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Indicate if registrant meets the emerging growth company criteria.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b-2
+ Details
Name:
dei_EntityEmergingGrowthCompany
Namespace Prefix:
dei_
Data Type:
xbrli:booleanItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Indicate if an emerging growth company has elected not to use the extended transition period for complying with any new or revised financial accounting standards.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Securities Act
-Number 7A
-Section B
-Subsection 2
+ Details
Name:
dei_EntityExTransitionPeriod
Namespace Prefix:
dei_
Data Type:
xbrli:booleanItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.
+ References
No definition available.
+ Details
Name:
dei_EntityFileNumber
Namespace Prefix:
dei_
Data Type:
dei:fileNumberItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Two-character EDGAR code representing the state or country of incorporation.
+ References
No definition available.
+ Details
Name:
dei_EntityIncorporationStateCountryCode
Namespace Prefix:
dei_
Data Type:
dei:edgarStateCountryItemType
Balance Type:
na
Period Type:
duration
X
- Definition
The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b-2
+ Details
Name:
dei_EntityRegistrantName
Namespace Prefix:
dei_
Data Type:
xbrli:normalizedStringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b-2
+ Details
Name:
dei_EntityTaxIdentificationNumber
Namespace Prefix:
dei_
Data Type:
dei:employerIdItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Local phone number for entity.
+ References
No definition available.
+ Details
Name:
dei_LocalPhoneNumber
Namespace Prefix:
dei_
Data Type:
xbrli:normalizedStringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 13e
-Subsection 4c
+ Details
Name:
dei_PreCommencementIssuerTenderOffer
Namespace Prefix:
dei_
Data Type:
xbrli:booleanItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 14d
-Subsection 2b
+ Details
Name:
dei_PreCommencementTenderOffer
Namespace Prefix:
dei_
Data Type:
xbrli:booleanItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Title of a 12(b) registered security.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b
+ Details
Name:
dei_Security12bTitle
Namespace Prefix:
dei_
Data Type:
dei:securityTitleItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Name of the Exchange on which a security is registered.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection d1-1
+ Details
Name:
dei_SecurityExchangeName
Namespace Prefix:
dei_
Data Type:
dei:edgarExchangeCodeItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 14a
-Subsection 12
+ Details
Name:
dei_SolicitingMaterial
Namespace Prefix:
dei_
Data Type:
xbrli:booleanItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Trading symbol of an instrument as listed on an exchange.
+ References
No definition available.
+ Details
Name:
dei_TradingSymbol
Namespace Prefix:
dei_
Data Type:
dei:tradingSymbolItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Securities Act
-Number 230
-Section 425
+ Details
Name:
dei_WrittenCommunications
Namespace Prefix:
dei_
Data Type:
xbrli:booleanItemType
Balance Type:
na
Period Type:
duration