M&A Acquirer Playbook

HALOZYME THERAPEUTICS, INC. acquisition history.

Every deal, price, and strategic rationale.

Company HALOZYME THERAPEUTICS, INC.
SEC CIK 0001159036
Tracked filings EDGAR · 8-K
Total deals tracked
2
Disclosed 8-K acquisitions, 2022 — present.
Aggregate disclosed value
$1.7B
~$1.7 billion across 2 disclosed transactions — Antares Pharma (~$960M cash) plus Elektrofi ($750M upfront, up to $900M with milestones).
Active acquisition years
2022 · 2025
one major drug-delivery acquisition per active year.
Primary sectors
Drug delivery technology and specialty pharmaceuticals
auto injector platforms and specialty commercial products (Antares Pharma) and ultra-high concentration biologic microparticle formulation (Elektrofi).
Verified 2 deals on this page · sourced from SEC filings
All cross-references covered.

2 deals, $1.7B deployed.

Plotted by close date where disclosed, otherwise announcement. Click any marker to jump to the deal entry.

The rationale that repeats.

Three patterns show up across HALOZYME THERAPEUTICS's deal book — what the team buys, how it pays, and how it integrates. The patterns are the throughline; the individual deals below are the evidence.

01
Acquisition criteria

Building a diversified drug delivery franchise.

Both of Halozyme's acquisitions extend its core ENHANZE drug delivery platform with complementary delivery technologies - Antares' best-in-class auto injector platform in 2022 and Elektrofi's Hypercon ultra-high concentration microparticle technology in 2025. Each deal was framed by management as strengthening Halozyme's position as a leading drug delivery company.

Antares PharmaElektrofi
02
Capital deployment

Acquiring licensing and royalty-revenue business models.

Halozyme has favored targets whose value rests on broadly licensable platforms that generate royalty revenue rather than one-off product sales. Antares brought a royalty-revenue-generating auto injector platform with broad licensing potential, and Elektrofi added a highly scalable licensing model with long-duration IP into the 2040s and royalty contribution expected to begin as early as 2030.

Antares PharmaElektrofi
03
Integration approach

Disciplined, milestone-aware deal structures.

Halozyme's two deals show a shift from a large all-cash buyout to a structure that shares risk via contingent payments. Antares was a clean ~$960 million all-cash tender offer, while Elektrofi paired a $750 million upfront payment with up to three $50 million milestone payments tied to separate product regulatory approvals, limiting cash exposure until value is proven.

Antares PharmaElektrofi

The full deal book.

2 acquisitions. Click any row to see the deal value, financing structure, target revenue, executive commentary, and the original SEC filing — the evidence behind the patterns above.

End of deal book
2 acquisitions · $1.7B deployed ·2022 — present
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