William E. Delaney IV - 29 Mar 2026 Form 4 Insider Report for ASSEMBLY BIOSCIENCES, INC. (ASMB)

Reporting relationship: Chief Scientific Officer
Issuer ticker: ASMB
Reported as of: 29 Mar 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 05 Jun 2026, 16:10:02 UTC
Prior SEC filing: 01 Apr 2025
Source filing: View source filing
Reporting owner signature: /s/ John O. Gunderson, as Attorney-in-Fact

Key filing fact

William E. Delaney IV filed Form 4 for ASSEMBLY BIOSCIENCES, INC. (ASMB) on 05 Jun 2026.

Key facts

This page summarizes William E. Delaney IV's Form 4 filing for ASSEMBLY BIOSCIENCES, INC. (ASMB).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 05 Jun 2026, 16:10.

Change

Previous filing in this sequence was filed on 01 Apr 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001812734 Primary reporting owner

Delaney William E IV

Relationship: Chief Scientific Officer
Address: C/O ASSEMBLY BIOSCIENCES, INC., TWO TOWER PLACE, 7TH FLOOR, SOUTH SAN FRANCISCO
Signature: /s/ John O. Gunderson, as Attorney-in-Fact
Signature date: 05 Jun 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ASMB transaction

Common Stock

Award

Transaction value
Shares: +14,000
Change %: +30%
Price: $0.000000^*
Shares after: 60,330
Date: 29 Mar 2026
Ownership: Direct
Footnotes: F1, F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

Restricted stock units ("RSUs") representing 35% of the reporting person's annual equity grant, which was approved on March 29, 2026 and was contingent upon stockholder approval of an amendment to the Issuer's Amended and Restated 2018 Stock Incentive Plan (the "Plan") that increased the number of shares of common stock authorized for issuance under the Plan (the "Plan Amendment"). Although the RSUs were granted on March 29, 2026, the RSUs became issuable upon stockholder approval of the Plan Amendment on June 4, 2026 and vest in four approximately equal installments, assuming continuous service on each vesting date, as follows: March 29, 2027; March 29, 2028; March 29, 2029; and March 29, 2030.

Footnote F2

Includes 688 shares acquired under the Assembly Biosciences, Inc. Second Amended and Restated 2018 Employee Stock Purchase Plan on May 14, 2026.