RA CAPITAL MANAGEMENT, L.P. - 19 Mar 2026 SCHEDULE 13D/A Report for ACRIVON THERAPEUTICS, INC. Common Stock, par value $0.001 per share (ACRV)

Filing Manager: RA CAPITAL MANAGEMENT, L.P.
Reporting Manager: RA Capital Management, L.P.
Security: ACRIVON THERAPEUTICS, INC. Common Stock, par value $0.001 per share
Symbol: ACRV
Shares outstanding: 38,870,454 shares
Disclosed Ownership: 8,396,018 shares
Ownership: 22%
Form type: SCHEDULE 13D/A
Filing time: 23 Mar 2026, 16:28:23 UTC
Date of event: 19 Mar 2026
Next filing: 23 Apr 2026
SEC: View on sec.gov

Quoteable Key Fact

"RA CAPITAL MANAGEMENT, L.P. disclosed 22% ownership in ACRIVON THERAPEUTICS, INC. Common Stock, par value $0.001 per share (ACRV) on 19 Mar 2026."

Quick Takeaways

RA CAPITAL MANAGEMENT, L.P. filed SCHEDULE 13D/A for ACRIVON THERAPEUTICS, INC. Common Stock, par value $0.001 per share (ACRV).
Disclosed ownership: 22%.
Date of event: 19 Mar 2026.

This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
You can verify ownership claims directly against the original SEC filing.

Backed by Schedule 13D/13G

Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.

Name	Ownership	Shares Owned	shared voting power	Signature	Title	CIK
RA Capital Management, L.P.	22%	8,396,018	8,396,018	/s/ Peter Kolchinsky	By Peter Kolchinsky, Authorized Signatory	0001346824
Peter Kolchinsky	22%	8,396,018	8,396,018	/s/ Peter Kolchinsky	Peter Kolchinsky	0001384859
Rajeev Shah	22%	8,396,018	8,396,018	/s/ Rajeev Shah	Rajeev Shah	0001619841
RA Capital Healthcare Fund, L.P.	20%	7,914,206	7,914,206	/s/ Peter Kolchinsky	By RA Capital Healthcare Fund GP, LLC, its General Partner, By Peter Kolchinsky, Manager	0001315082