Nicole S. White - 29 Mar 2026 Form 4 Insider Report for ASSEMBLY BIOSCIENCES, INC. (ASMB)

Reporting relationship: Chief Manufacturing Officer
Issuer ticker: ASMB
Reported as of: 29 Mar 2026
Net transaction value: -$5,258
SEC form: 4
Accepted by SEC: 31 Mar 2026, 16:20:03 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

Nicole S. White filed Form 4 for ASSEMBLY BIOSCIENCES, INC. (ASMB) on 31 Mar 2026.

Key facts

This page summarizes Nicole S. White's Form 4 filing for ASSEMBLY BIOSCIENCES, INC. (ASMB).
3 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 31 Mar 2026, 16:20.

Change

Previous filing in this sequence was filed on 01 Apr 2025.
Current net transaction value: -$5,258.

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 0001993254 Primary reporting owner

White Nicole S

Relationship: Chief Manufacturing 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: 31 Mar 2026

Reported non-derivative transactions

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

ASMB transaction

Common Stock

Award

Transaction value
Shares: +26,000
Change %: +223%
Price: $0.000000^*
Shares after: 37,674
Date: 29 Mar 2026
Ownership: Direct
Footnotes: F1, F2

ASMB transaction

Common Stock

Sale

Transaction value: $5,010
Shares: -188
Change %: -0.5%
Price: $26.65
Shares after: 37,486
Date: 30 Mar 2026
Ownership: Direct
Footnotes: F3, F4

ASMB transaction

Common Stock

Sale

Transaction value: $247
Shares: -9
Change %: -0.02%
Price: $27.49
Shares after: 37,477
Date: 30 Mar 2026
Ownership: Direct
Footnotes: F3, F5

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 5 footnotes

Footnote F1

Grant of restricted stock units ("RSUs"). The RSUs vest in four 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

RSUs represent 65% of the reporting person's annual equity grant. The remaining 35% of the RSUs granted are contingent upon stockholder approval of an amendment to the Issuer's Amended and Restated 2018 Stock Incentive Plan (the "Plan") that increases the number of shares of common stock authorized for issuance under the Plan.

Footnote F3

The sale reported on this Form 4 represents shares sold by the reporting person to cover tax withholding obligations in connection with the vesting and settlement of restricted stock units. The sale is mandated by an administrative rule adopted by the Compensation Committee of the Issuer's Board of Directors that requires the satisfaction of tax withholding obligations to be funded by a "sell-to-cover" transaction and does not represent a discretionary transaction by the reporting person.

Footnote F4

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $26.35 to $27.26, inclusive. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within.

Footnote F5

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $27.39 to $27.84, inclusive. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within.