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Shuttingdown

Centessa Pharmaceuticals plc

Pharmaceutical Preparations · ALTRINCHAM, CHESHIRE

No longer listed

High confidence (85%)

Updated Oct 17, 2026, 12:03 AM

What is happening

Derived by rule set status-rules-2026.09.7

The company deregistered its securities and stopped filing with the SEC. Companies do that when they are acquired, when they go private, and when they fail; the filing does not say which.

Latest material event: Centessa Pharmaceuticals plc deregistered its securities (Jul 6, 2026)

Timeline

Every material event, newest first. History is never overwritten.

  1. Centessa Pharmaceuticals plc deregistered its securities

    Jul 6, 2026

    Registration withdrawn

    • SEC EDGAR — “15-12G 1 d170143d1512g.htm 15-12G 15-12G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13 AND 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934. Commission File Number 001-40445 Centessa Pharmaceuticals plc (Exact name of registrant as specified in its charter) 3rd Floor 1 Ashley Road Altrincham Cheshire WA14 2DT United Kingdom +1 (617) 468-5770 (Address, including zip code, and telephone number, inc…”

  2. Centessa Pharmaceuticals plc received a delisting notice from its exchange

    Jun 24, 2026

    Delisting notice received

    • SEC EDGAR — “Item 3.01 Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing. In connection with the completion of the Acquisition, Centessa requested that The Nasdaq Stock Market LLC ( Nasdaq ) (a) halt trading of the Company ADSs effective as of 8:00 p.m. New York City time on June 23, 2026 and (b) file with the Securities and Exchange Commission (the SEC ) a Notification of Removal from Listing and/or Registration under Section 12(b) of the Securities Exchange Act of 1934, as amended (the Exchange Act ), on Form 25 to delist the Company ADSs. Upon effectiven…”

  3. Centessa Pharmaceuticals plc was delisted from its exchange

    Jun 24, 2026

    Delisting effective

    • SEC EDGAR — “X0203 0001354457 Nasdaq Stock Market LLC 0001847903 Centessa Pharmaceuticals plc 001-40445 3rd Floor, 1 Ashley Rd Altrincham Cheshire X0 UNITED KINGDOM WA14 2DT +447391789784 American Depositary Shares 17 CFR 240.12d2-2(a)(3) katelin rowe cdo analyst 2026-06-24”

Company information

Founded
—
Employees (estimate)
—
Industry
Pharmaceutical Preparations
Subindustry
—
SEC CIK
0001847903
Website
—
LinkedIn
—
Headquarters
ALTRINCHAM, CHESHIRE
Also known as
Centessa Pharmaceuticals Ltd
Legal entities
Centessa Pharmaceuticals plc

Sources

Every material source used to build this profile.

  • SEC Company Submissions (TIER 1 · UNVERIFIED)

    Centessa Pharmaceuticals plc — Pharmaceutical Preparations (SIC 2834) — ALTRINCHAM, CHESHIRE, United Kingdom
    View source record

  • SEC EDGAR (TIER 1 · UNVERIFIED)

    15-12G 1 d170143d1512g.htm 15-12G 15-12G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13 AND 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934. Commission File Number 001-40445 Centessa Pharmaceuticals plc (Exact name of registrant as specified in its charter) 3rd Floor 1 Ashley Road Altrincham Cheshire WA14 2DT United Kingdom +1 (617) 468-5770 (Address, including zip code, and telephone number, inc…
    View source record

  • SEC EDGAR (TIER 1 · UNVERIFIED)

    X0203 0001354457 Nasdaq Stock Market LLC 0001847903 Centessa Pharmaceuticals plc 001-40445 3rd Floor, 1 Ashley Rd Altrincham Cheshire X0 UNITED KINGDOM WA14 2DT +447391789784 American Depositary Shares 17 CFR 240.12d2-2(a)(3) katelin rowe cdo analyst 2026-06-24
    View source record

  • SEC EDGAR (TIER 1 · UNVERIFIED)

    Item 3.01 Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing. In connection with the completion of the Acquisition, Centessa requested that The Nasdaq Stock Market LLC ( Nasdaq ) (a) halt trading of the Company ADSs effective as of 8:00 p.m. New York City time on June 23, 2026 and (b) file with the Securities and Exchange Commission (the SEC ) a Notification of Removal from Listing and/or Registration under Section 12(b) of the Securities Exchange Act of 1934, as amended (the Exchange Act ), on Form 25 to delist the Company ADSs. Upon effectiven…
    View source record

Status history

Every derived status, with the rule that produced it.

  • DISTRESS_SIGNAL → NO_LONGER_LISTEDPUBLIC_LISTING_ENDED · Sep 18, 2026, 01:31 AM

    The company deregistered its securities and stopped filing with the SEC. Companies do that when they are acquired, when they go private, and when they fail; the filing does not say which.

  • DISTRESS_SIGNAL → DISTRESS_SIGNALLISTING_STANDARDS_WARNING · Sep 18, 2026, 01:14 AM

    An exchange warned the company it no longer meets the listing standards. Companies regain compliance often.

  • DISTRESS_SIGNAL → DISTRESS_SIGNALPUBLIC_LISTING_ENDED · Sep 15, 2026, 12:35 PM

    The company stopped being publicly listed. That happens to failing companies and to acquired ones alike.

  • DISTRESS_SIGNAL → DISTRESS_SIGNALPUBLIC_LISTING_ENDED · Sep 13, 2026, 12:04 AM

    The company stopped being publicly listed. That happens to failing companies and to acquired ones alike.

  • DISTRESS_SIGNAL → DISTRESS_SIGNALPUBLIC_LISTING_ENDED · Sep 11, 2026, 12:03 AM

    The company stopped being publicly listed. That happens to failing companies and to acquired ones alike.

  • DISTRESS_SIGNAL → DISTRESS_SIGNALPUBLIC_LISTING_ENDED · Sep 8, 2026, 03:17 AM

    The company stopped being publicly listed. That happens to failing companies and to acquired ones alike.

  • UNKNOWN → DISTRESS_SIGNALPUBLIC_LISTING_ENDED · Sep 8, 2026, 03:16 AM

    An exchange warned the company it no longer meets the listing standards. Companies regain compliance often.