Deal Flow
Letter · prints on one page
Transaction tear sheetData as of Nov 7, 2026
M&A · Healthcare · Pharmaceutical Preparations

AbbVie Inc. to acquire ImmunoGen, Inc.

Announced Nov 30, 2023 · Closed Feb 12, 2024

Deal value$10.10BEV $9.49B
Premium94.6%To unaffected price
EV / Adj. EBITDA—33.0x EV / Revenue
ConsiderationAll cash$31.26 per share

Transaction

Acquirer
AbbVie Inc. (ABBV)
Target
ImmunoGen, Inc.
Buyer type
Strategic
Offer price per share
$31.26
Enterprise value
$9.49B
Status
Closed Feb 12, 2024

Deal protections

Break fee (target pays)
$354M · 3.5%
Reverse fee (buyer pays)
$657M · 6.5%
Go-shop
No-shop
Financing
Committed · Goldman Sachs

Advisors

To the acquirer
Morgan Stanley
To the target
Goldman Sachs, Lazard

Sector context · Healthcare

Comparable deals
96 in the prior 24 months
Premium
94.6% vs. 52.0% sector median
EV / Adj. EBITDA
Sector median 17.1x
Break fee
3.5% vs. 3.5% sector median

Timeline

  1. AnnouncedNov 30, 2023
  2. Proxy filedDec 21, 2023
  3. Definitive proxyJan 2, 2024
  4. Shareholder voteJan 31, 2024
  5. ClosedFeb 12, 2024

Valuation · fairness opinions

Other analysisGoldman Sachs$16.25$20.40
Premiums paidGoldman Sachs$18.80$25.05
Discounted cash flowLazard$16.25$20.40
Trading comparablesLazard$5.60$10.45
Precedent transactionsLazard$14.10$20.45
Premiums paidLazard$19.80$26.85
Offer $31.26

Implied value per ImmunoGen, Inc. share by analysis, from Goldman Sachs and Lazard · DCF discount rate 11%–13%.

Sources
  • 8-K (EX-99) · Nov 30, 2023
  • DEFA14A (EX-99.1) · Nov 30, 2023
  • 8-K · Nov 30, 2023

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.