Deal Flow
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Transaction tear sheetData as of Nov 7, 2026
M&A · Healthcare · Pharmaceutical Preparations

Pfizer Inc to acquire Arena Pharmaceuticals Inc

Announced Dec 13, 2021 · Closed Mar 11, 2022

Deal value$6.70BEV $6.31B
Premium100.0%To unaffected price
EV / Adj. EBITDA—
ConsiderationAll cash$100.00 per share

Transaction

Acquirer
Pfizer Inc (PFE)
Target
Arena Pharmaceuticals Inc (ARNA)
Buyer type
Strategic
Offer price per share
$100.00
Enterprise value
$6.31B
Status
Closed Mar 11, 2022

Deal protections

Break fee (target pays)
$235M · 3.5%
Reverse fee (buyer pays)
$350M · 5.2%
Go-shop
No-shop
Financing
—

Advisors

To the acquirer
Not disclosed
To the target
Guggenheim, Evercore
Evercore fee
$36.6M
Guggenheim fee
$2.0M

Sector context · Healthcare

Comparable deals
31 in the prior 24 months
Premium
100.0% vs. 45.5% sector median
EV / Adj. EBITDA
Sector median 20.4x
Break fee
3.5% vs. 3.3% sector median

Timeline

  1. AnnouncedDec 13, 2021
  2. Proxy filedDec 23, 2021
  3. Definitive proxyJan 3, 2022
  4. Shareholder voteFeb 2, 2022
  5. ClosedMar 11, 2022

Valuation · fairness opinions

Discounted cash flowEvercore$82.95$101.00
Precedent transactionsEvercore$69.75$109.80
Analyst price targetsEvercore$71.00$120.00
Trading comparablesEvercore$42.30$69.75
Premiums paidEvercore$72.40$89.90
Discounted cash flowGuggenheim$86.00$107.00
Discounted cash flowGuggenheim$86.00$123.00
Offer $100.00

Implied value per Arena Pharmaceuticals Inc share by analysis, from Evercore and Guggenheim · DCF discount rate 8.5%–10%.

Sources
  • 8-K (EX-99.1) · Dec 13, 2021
  • DEFA14A (EX-99.1) · Dec 13, 2021
  • DEFA14A · Dec 13, 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.