Deal Flow
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Transaction tear sheetData as of Nov 7, 2026
M&A · Healthcare · Biological Products, (No Diagnostic Substances)

Merck & Co., Inc. to acquire Acceleron Pharma Inc

Announced Sep 30, 2021 · Closed Nov 22, 2021

Deal value$11.50BEV $11.16B
Premium—To unaffected price
EV / Adj. EBITDA—
ConsiderationAll cash$180.00 per share

Transaction

Acquirer
Merck & Co., Inc. (MRK)
Target
Acceleron Pharma Inc
Buyer type
Strategic
Offer price per share
$180.00
Enterprise value
$11.16B
Status
Closed Nov 22, 2021

Deal protections

Break fee (target pays)
$345M · 3.0%
Reverse fee (buyer pays)
$750M · 6.5%
Go-shop
No-shop
Financing
No financing condition

Advisors

To the acquirer
Credit Suisse, Goldman Sachs
To the target
Centerview, JPMorgan

Sector context · Healthcare

Comparable deals
27 in the prior 24 months
Premium
Sector median 44.0%
EV / Adj. EBITDA
Sector median 20.4x
Break fee
3.0% vs. 3.3% sector median

Timeline

  1. AnnouncedSep 30, 2021
  2. Tender offerOct 12, 2021
  3. ClosedNov 22, 2021
Sources
  • 8-K (EX-99) · Sep 30, 2021
  • SC TO-C (EX-99.1) · Sep 30, 2021
  • 8-K · Sep 30, 2021

Adj. EBITDA is operating income + D&A + impairment, restructuring, deal costs and stock compensation, less any large gain on a sale, last twelve months, from the target's filings. Calculated by Castle, so it can differ from a bank's adjusted figure.

Prepared with Castle from public SEC EDGAR filings. Figures are extracted automatically; verify against the source documents. Not investment advice.