Skip to main content
Midas Edge

Mersana Therapeutics, Inc. MRSN (last ticker on record)

CIK 1442836Its SEC filings (opens in a new tab)

  • 95% wipeout
  • Restructuring
  • Delisting notice (not a red flag)

These figures describe clients, not conduct. A lawyer or firm can serve many companies that later had trouble for reasons that have nothing to do with their work, and nothing here says any lawyer or firm did anything wrong.

Red flags
2
Newest began Jul 2023
Largest fall in its shares
99%
Dec 2020 to Aug 2025
Law firms
8
Linked to 5 or more companies
Lawyers
10
Linked to 5 or more companies

What happened

  1. Delisting notice (Item 3.01)Form 8-K (opens in a new tab)
  2. Delisting notice (Item 3.01)Form 8-K (opens in a new tab)
  3. Exit or disposal costs (Item 2.05)Form 8-K (opens in a new tab)
  4. Delisting notice (Item 3.01)Form 8-K (opens in a new tab)
  5. Shares down 95% from their high
  6. Exit or disposal costs (Item 2.05)Form 8-K (opens in a new tab)

An SEC release can name a company’s officer, or its stock as what a scheme sold or moved, so the company may be the victim. Each link goes to what to read.

Law firms

The ratios are about all the companies linked to each one, this one included: how many had that outcome, as a multiple of what comparable companies show. 1.00 means no more than expected.

Lawyers

The ratios are about all the companies linked to each one, this one included: how many had that outcome, as a multiple of what comparable companies show. 1.00 means no more than expected.