Annual Meeting Embargo Policy

Information that goes beyond that which is contained within the “four corners” of the abstract as posted online, such as additional analysis, presentation slides, commentary, or updated information from those individuals and companies involved in the study, is embargoed according to the following criteria:

• For oral presentations: The embargo lifts at the start time of the session in which the presentation is being made, or the start of the ASH press briefing containing that research (whichever comes first, unless otherwise noted).
  • Example: If an oral session begins on Saturday, December 12, at 10:00 a.m. Eastern time, the embargo will lift at that exact time.
• For poster presentations: The embargo lifts when the poster session containing the poster opens for viewing in that day, or at the start of the ASH press briefing containing the research (whichever comes first, unless otherwise noted).
  • Example: If a poster is included in the Saturday, December 12 poster session, the embargo will lift at 9:00 a.m. Eastern time when the poster hall opens.
• For online-only abstracts: The embargo lifts when abstracts are published online on November 4, 2026, at 9:00 a.m. Eastern Time. These abstracts are not presented at the annual meeting.

Exception to Embargo Policy - SEC Regulations

In certain situations, a publicly traded company must legally disclose to the public certain data from the abstract prior to ASH embargo to comply with requirements of the U.S. Securities and Exchange Commission (SEC) or a corresponding regulatory body in the country where the company's stock is traded. Under such extenuating circumstances, ASH may grant an exception to its embargo rules and allow the company to release limited topline data (i.e., general findings with no additional analysis, commentary, investigator quotes, etc.) from the abstract without jeopardizing its eligibility for presentation at the annual meeting.

To request an exception to the ASH embargo policy for an accepted abstract, the following should be sent to ASH Communications Manager Melissa McGue at mmcgue@hematology.org copying the corresponding author of the abstract:

1. Detailed information about the release, including the nature of the data to be included and timing of the release; and
2. A letter signed by legal counsel (see sample letter) advising that disclosure of the information is necessary to comply with applicable securities laws and that the information contained within is only the minimum necessary to ensure such compliance.

If the request is made before the abstract has been accepted for presentation, the above information must be emailed to ASHabstracts@hematology.org and copy Melissa McGue at mmcgue@hematology.org.

The press release (see sample press release) should note that the abstract has been submitted (or accepted, if appropriate) for presentation at the ASH annual meeting. ASH will evaluate these requests on a case-by-case basis and reserves the right to change the type of presentation (e.g., from oral to poster) or remove the abstract from the annual meeting program if the released information is judged to substantially detract from the novelty of the annual meeting presentation.

Copyright and Reuse Policy for Abstracts

Authors assign copyright of the abstract to ASH upon submission, unless one of the authors is a U.S. Federal employee (in such cases, ASH does not hold copyright). This means that the identical abstract may not be republished or submitted to another meeting. Read ASH’s annual meeting copyright and reuse policy.