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

Amgen Inc to acquire Horizon Therapeutics Public Ltd Co

Announced Dec 12, 2022 · Closed Oct 6, 2023

Deal value$28.30BEV $28.30B
Premium47.9%To unaffected price
EV / Adj. EBITDA21.6x7.6x EV / Revenue
ConsiderationAll cash$116.50 per share

Transaction

Acquirer
Amgen Inc (AMGN)
Target
Horizon Therapeutics Public Ltd Co
Buyer type
Strategic
Offer price per share
$116.50
Enterprise value
$28.30B
Status
Closed Oct 6, 2023

Deal protections

Break fee (target pays)
—
Reverse fee (buyer pays)
$974M · 3.4%
Go-shop
No-shop
Financing
—

Advisors

To the acquirer
PJT Partners, Citigroup
To the target
Morgan Stanley, JPMorgan
Morgan Stanley fee
$80.0M

Sector context · Healthcare

Comparable deals
73 in the prior 24 months
Premium
47.9% vs. 47.0% sector median
EV / Adj. EBITDA
21.6x vs. 18.4x sector median
Break fee
Sector median 3.4%

Timeline

  1. AnnouncedDec 12, 2022
  2. Proxy filedDec 30, 2022
  3. Definitive proxyJan 23, 2023
  4. Shareholder voteFeb 24, 2023
  5. ClosedOct 6, 2023

Valuation · fairness opinions

Discounted cash flow$101.00$133.00
Sum of the parts$102.00$113.00
Premiums paid$109.00$130.00
Premiums paid$102.00$131.00
Analyst price targets$74.00$146.00
Offer $116.50

Implied value per Horizon Therapeutics Public Ltd Co share by analysis, from Morgan Stanley · DCF discount rate 8.9%–10.2%.

Sources
  • DEFA14A · Dec 12, 2022

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.