Mass departure of major insurers and reinsurers from the Net Zero Insurance Alliance in 2023, under perceived US antitrust pressure.
The Net Zero Insurance Alliance exodus refers to the wave of departures by major insurers and reinsurers that emptied this voluntary underwriting decarbonization coalition within a matter of months in 2023, only a few years after it was founded. The NZIA brought together commitments to align underwriting portfolios with a net-zero emissions pathway, modeled on similar alliances on the investor side. The documented trigger was political and legal pressure in the United States, where several state attorneys general threatened antitrust action against climate coalitions bringing competitors together around coordinated commitments, a risk member insurers judged disproportionate relative to the reputational benefit of membership. The episode illustrates a fragility specific to voluntary, coordinated climate commitments among direct competitors: they carry a distinct legal risk once perceived as concerted action on market conditions, separate from the reputational risk that justified their creation in the first place. For sector observers, this episode marked a turning point in how insurers communicate their climate commitments, more individualized and less publicly coordinated after 2023.
Between March and June 2023, nearly all the major founding members of the Net Zero Insurance Alliance, including Munich Re, Zurich, Hannover Re, AXA, Allianz, SCOR and Swiss Re, left the alliance one after another, citing antitrust legal risk rather than any disagreement with the climate objective itself.
NZIA exodus, effondrement NZIA, retrait assureurs NZIA