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

Novartis AG to acquire Tourmaline Bio, Inc.

Announced Sep 9, 2025 · Closed Oct 28, 2025

Deal value$1.40BEV $1.20B
Premium59.0%To unaffected price
EV / Adj. EBITDA—
ConsiderationAll cash$48.00 per share

Transaction

Acquirer
Novartis AG (NVS)
Target
Tourmaline Bio, Inc. (TRML)
Buyer type
Strategic
Offer price per share
$48.00
Enterprise value
$1.20B
Status
Closed Oct 28, 2025

Deal protections

Break fee (target pays)
$48.0M · 3.4%
Reverse fee (buyer pays)
$68.5M · 4.9%
Go-shop
No-shop
Financing
—

Advisors

To the acquirer
Not disclosed
To the target
Leerink Partners

Sector context · Healthcare

Comparable deals
94 in the prior 24 months
Premium
59.0% vs. 67.0% sector median
EV / Adj. EBITDA
Sector median 14.5x
Break fee
3.4% vs. 3.3% sector median

Timeline

  1. AnnouncedSep 9, 2025
  2. Tender offerSep 29, 2025
  3. ClosedOct 28, 2025

Valuation · fairness opinions

Discounted cash flow$34.35$41.70
Precedent transactions$45.64$55.49
Precedent transactions$40.73$53.01
Analyst price targets$35.00$70.00
Offer $48.00

Implied value per Tourmaline Bio, Inc. share by analysis, from Leerink Partners.

Sources
  • SC TO-C (EX-99.1) · Sep 9, 2025
  • SC14D9C (EX-99.3) · Sep 9, 2025
  • 8-K · Sep 9, 2025

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.