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We study carbon-reduction pledges of publicly traded U.S. oil exploration and production (E&P) companies. Of the 69 firms in the sample, 18 have committed to net-zero carbon targets, 14 have announced significant emissions cuts, whereas the remaining 37 firms have not announced any formal commitment to reduce emissions. We find that a firm’s energy production and ownership by BlackRock is positively associated with its decision to announce a net-zero pledge or significant emission cuts. E&P firms are likely to announce such commitments after Engine No. 1 proposed its slate of directors for Exxon’s board. The stock market reacts more negatively to net-zero pledges relative to emission-reduction pledges on average. However, the market reaction is related to the quality and credibility of these pledges. In particular, we find that the negative market reaction to net-zero pledges is mainly driven by firms with …