SMU Corporate Governance Initiative · Reincorporation Tracker

ExxonMobil Corp.

XOMNYSE Energy · NJ → TX

Canonical · 9-page publication subsite · cited in DEFA14A
Open the full ExxonMobil publication subsite →

The companion site to Shane Goodwin's Columbia Law School Blue Sky Blog publication (May 5, 2026), cited by ExxonMobil in its DEFA14A solicitation (accession 0001193125-26-219305, filed May 12, 2026). Nine pages: the argument, the coalition arithmetic, the event-study evidence, the statutory analysis, the methodology, robustness extensions, adversarial stress tests, and an open replication kit.

Open full publication → The argument → The coalition → The evidence → The statute → Replication kit →
Announcement
2026-03-10
First SEC disclosure
Meeting / Vote
2026-05-27
SCHEDULED
Effective
—
Legal effective date
Market Cap
$620.0B
At announcement

Why this firm matters

At $620.0B pre-move market value, ExxonMobil Corp. is among the largest firms in the cohort and carries disproportionate weight in market-value-weighted aggregates. Vote scheduled for 2026-05-27; results pending.

Vote outcome — reincorporation proposal

Approval standard: favorable vote of a majority of votes cast (abstentions count for quorum but not for voting). Source: ExxonMobil DEF 14A, Accession 0001193125-26-147614 (Apr. 8, 2026). Meeting type: annual.

Vote totals not yet pulled. Awaiting EDGAR Item 5.07.

Visual evidence — event study around the March 10, 2026 announcement

Six chart-level views of the announcement-window data. Captions are verbatim from the underlying figures; underlying numbers come from xom_rerun_results.json (estimation window 2025-03-25 to 2026-03-09, 240 trading days; 21 energy-sector donors; SC top-3 weights CVX 0.55, EOG 0.20, SLB 0.09).
ExxonMobil tracked its energy-peer benchmark through the announcement
ExxonMobil tracked its energy-peer benchmark through the announcement
Pre-announcement tracking error = 0.77%. The two lines stay close through the announcement and after — that visual co-movement is the null finding.
Method
Synthetic control · 21-firm energy-sector donor pool · normalized to 100 sixty trading days before the announcement.
The gap between ExxonMobil and its benchmark stayed inside the pre-announcement range
The gap between ExxonMobil and its benchmark stayed inside the pre-announcement range
Every post-announcement day stays inside the same range the gap occupied before the announcement. No break in the relationship; no governance discount visible at the event date.
Method
Cumulative ExxonMobil-minus-synthetic gap with ±1.50 pp 95% pre-announcement uncertainty band.
ExxonMobil's announcement-day move was ordinary, not an outlier
ExxonMobil's announcement-day move was ordinary, not an outlier
92% of random pseudo-days had a larger absolute gap than the real announcement day. Placebo p-value = 0.92. If the announcement had moved the stock, the red line would sit far in the tail of the distribution. Instead it sits near the center — a real shock would not look like this.
Method
In-time placebo: 100 random pseudo-announcement days drawn from the 220 trading days before the real announcement; same synthetic-control machinery applied to each.
The data rule out an economically meaningful negative effect on ExxonMobil's stock price
The data rule out an economically meaningful negative effect on ExxonMobil's stock price
Best estimate of true effect = +0.02%. 95% credibility range: [−1.48%, +1.53%]. A −2% governance discount has 0.40% probability of being true; a −3% discount, less than 0.1%. The data are not consistent with the disenfranchisement thesis.
Method
Bayesian posterior over the announcement-day true effect, weakly-informative prior, conditioned on the synthetic-control day-0 gap and pre-period RMSE.
Oil-factor importance: nested specification comparison
Oil-factor importance: nested specification comparison
Adding BNO to the market model raises R² from 0.22 to 0.55. β_BNO = 0.488, t = 12.6, p < 10⁻²⁷. F(1, 217) = 158.5 (p < 10⁻¹⁶).
Method
Nested OLS comparison: Spec 1 = XOM ~ SPY (market only); Spec 2 = XOM ~ SPY + BNO (oil-augmented). Estimation window 2025-03-25 to 2026-03-09. Justifies oil-augmented as the preferred announcement-window benchmark.
Data integrity. Each PNG is byte-identical to the figure shipped with the FINAL_BLUE_SKY analysis package; SHA-256 verified at deploy time. The underlying coefficients trace to xom_rerun_results.json in the replication kit. Open methodology and underlying code →
See also: Cohort-wide event study → for the nine-firm Day-0 forest plot and cross-firm comparison.

Event-study abnormal returns — announcement window

Returns around the announcement date.
Event date: 2026-03-10 · Estimation window: 2025-03-25 to 2026-03-09 (240 days)
SpecificationDay-0 ARInference
Synthetic control (21-donor energy peer pool)i+0.021%placebo p-value (in-time, gap-based) = 0.955
Market model (SPY benchmark)i-1.55%Patell-z p-value = 0.281
Oil-augmented market model (SPY + BNO) HEADLINEi-2.19% ***Patell-z p-value = 0.049
Matched pair vs CVX (market-model-adjusted)i+0.04%two-sided p-value = 0.958
Raw differential vs CVXi+0.13%no inference
Robustness checks — does the headline result hold up?

Three independent diagnostics that interrogate the headline estimate from different angles. All three pointing the same way = high confidence in the result.

  • Pre-event drift check: the firm's daily abnormal return drifted by -0.0002% per day in the pre-event window (p = 0.820). no detectable pre-event drift ✓. — A near-zero slope means the pre-event period was stable, so the day-0 reaction is not contamination from a pre-existing trend.
  • Donor co-movement check: 10 of 11 peer firms moved in the same direction as the treated firm on the event day (binomial p = 0.0117). — A high concordance means the day was driven by industry-wide news rather than something firm-specific. A low concordance means the firm moved differently from peers (potential firm-specific signal).
  • Synthetic-control fit quality: pre-event correlation between the firm and its synthetic twin = 0.886 (good tracking); R² = 0.771 (fraction of pre-event variance explained); Durbin-Watson = 1.88 (no autocorrelation). — Higher correlation + higher R² + Durbin-Watson near 2 means the synthetic peer was a good match before the event, so the post-event gap is interpretable.

Event-study abnormal returns — vote window

Returns around the shareholder-vote (or written-consent) date.

Vote window CARs not yet computed (vote on 2026-05-27).

Long-run abnormal returns & pooled estimates

Buy-and-hold abnormal returns (1 / 3 / 6 / 12 months) and calendar-time portfolio alpha (CTE) post-effective.

No long-run / pooled estimates available for this firm yet — run phase5z_compute_longrun.py on Windows to populate (requires effective date ≥ 3 months ago).

Cohort-level robustness battery

Heckman selection-corrected ATE · Romano-Wolf step-down + BH FDR · pooled BHAR. This firm's reading is shown in context of the full cohort.

Heckman two-step selection correction (controlled-vs-widely-held)

Cohort ATE = +0.94% (SE = 7.06%, n = 2395) after correcting for controller-status selection (inverse Mills ratio = -0.062).

Romano-Wolf step-down + Benjamini-Hochberg FDR (n = 47)

This firm: raw p = 0.282, Romano-Wolf adjusted p = 1.000, BH-FDR adjusted p = 0.966. Multiple-hypothesis correction is computed across the full cohort to control family-wise error rate at alpha = 0.05.

Pooled cohort BHAR (mover firms only)

BHAR_63d: mean = -5.60% (SE = 22.11%, n = 3, p = 0.499) · BHAR_126d: mean = +17.33% (SE = 41.17%, n = 3, p = 0.774)

See Cohort event study → for the full battery and forest plots.

Texas Statutory Adoptions

Status: N/A pending reincorporation.

The Texas opt-in statutory regimes (TBOC §21.552 / SB 29 derivative threshold; TBOC §21.373 / SB 1057 shareholder-proposal threshold) are available only to firms that are nationally listed Texas corporations. ExxonMobil Corp. is not yet Texas-incorporated; the move is pending shareholder vote with a proposed effective date of 2026-05-27. These adoptions can be elected only on or after the firm's TX effective date.

Source filings

Primary-source documents on SEC EDGAR plus IR / search links.

Classification & audit trail

Bucket
D
Panel eligibility
PANEL_A_post_SB29
Audit status
NEEDS_MANUAL_REVIEW
Source confidence
VERIFIED_PROXY
Transaction status
PENDING
Audit notes
VERIFY: XOM NJ→TX pending vote 2026-05-27; code PENDING_TRANSACTION.
Effective date present but no Accession URL in v6 rev78; retrieve from EDGAR.
v2.9: TRANSACTION_STATUS=PENDING (vote 2026-05-27 future-dated); TX_eff_dt nulled, preserved as TX_proposed_eff_dt
Phase 3M 2026-04-27: status=SCHEDULED — moved 2026-05-27 from actual to proposed_effective_date_iso. Will promote to actual after vote passes.
[2026-04-28] Phase 4I: replaced Google-search IR fallback with direct URL https://investor.exxonmobil.com/
[2026-04-28] Phase 4L: loaded XOM event-study results from Exxon/dexit-tracker/data_and_code/. Headline CAR: oil-augmented day-0 AR = -2.19% (Patell p=0.049). Synthetic-control day-0 gap = -0.001105 (placebo p=0.9545). 21-donor energy peer pool with CVX 54.9% + EOG 19.8% + SLB 9.4% top weights. Vote scheduled 2026-05-27; vote-window CARs will be added post-vote. [2026-04-28] phase5e: cleaned edgar_accession_canonical: extracted '0001193125-26-098908' from raw value '000119312526098908 (PRE 14A); Rule 14a-12 soliciting material also filed' (source=unhyphenated_normalized) [2026-04-29] phase5u: row independently validated by external Reviewer (full-residual pass, 78/276 substantive answers); validations applied: V_DATE_ANN=CONFIRM; V_DATE_MEET=CONFIRM; V_DATE_EFF=NOT_YET_EFFECTIVE; V_FROM_TO=CONFIRM; V_BUCKET=CONFIRM; V_COHORT=CONFIRM_INCLUSION; primary-source URLs all under https://www.sec.gov/Archives/ [2026-04-29] phase5v: row independently re-validated by external Reviewer (Round 4 full-residual pass, 85/276 substantive); all bucket and pending-status conclusions match v3.57 [2026-04-29] phase5w: comprehensive validation by external reviewer across tranches v6 (4-version full residual walk, 269 substantive answers across 52 firms, 0 bucket drifts vs v3.58)
[2026-04-29] v3.75: ExxonMobil is NJ-incorporated since 1882 — converting NJ→TX, NOT a DGCL §266 case. NJ Business Corporation Act §14A:10-3 (mergers/conversions) standard applies, NOT DGCL §266. Annual meeting May 27, 2026. Per A&O Shearman: 'shareholder rights remain largely comparable, while Texas law provides protections against abusive litigation, clearer standards, and legal predictability'. Per Bloomberg Law: 'Exxon Texas Move Should Prompt Shareholders to Read Fine Print'. EXACT NJ-statutory standard quote PENDING reviewer pincite.

Related firms

Use these for cross-firm sanity checks — peers in size, sector, or destination.
nearest size
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same sector
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WFRD · Ireland → TX · $5.0B
same destination
Tesla, Inc.
TSLA · DE → TX · $1.50T

M · Multi-factor robustness battery (publication-grade)

Auto-generated multi-factor analysis battery anchored to the same publication-grade specifications used in the Southwest Airlines bespoke case study. Computed by phase5z_cohort_extended_controls_batch.py using ExxonMobil Corp.-specific sector ETF (XLE) and curated peer pool. T0 = 2026-03-10; estimation window 240 days pre-T0; post-event horizons 21 / 63 / 126 / 252 days. Sub-sections below: M.1 multi-factor BHAR and M.3 firm-FE pairwise BHAR.
Note — thin post-event window

ExxonMobil Corp.'s post-event window is shorter than 6 months; long-horizon analyses (6-month, 12-month) populate progressively as more trading days elapse. Short-horizon analyses (1-month and 3-month) are reported below; multi-factor CTE alpha (M.2) and TOST equivalence (M.4) require longer post-event series and are deferred. Re-run the cohort batch when more post-event data is available.

M.1 · Multi-factor BHAR with FF5+UMD + sector control

Publication-grade BHAR battery: CAPM, Fama-French three-factor, Fama-French five-factor, Carhart six-factor (FF5+UMD), and FFC6+sector ETF (industry-augmented; sector ETF = XLE).

The base SPY-only BHAR (computed in the firm-page event-study section) under-controls for sector co-movement, size, value, profitability, investment, and momentum. Each of these factors can drive double-digit-percent buy-and-hold returns over a year-long horizon, so SPY-benchmarking can mistake factor exposure for an event effect. The multi-factor specifications below decompose ExxonMobil Corp.'s post-event return into factor-attributable and residual components; the residual is the BHAR estimate of the event effect.

SpecificationFactors 1 month3 months
BHARpBHARp
CAPM1+2.10%0.749−3.97%0.648
FF33+0.35%0.955−3.19%0.697
FF55+0.28%0.963−4.06%0.611
FFC66+1.09%0.856−3.09%0.699
FFC6 + sector ETF HEADLINE7−0.68%0.800−3.61%0.310

Horizons not yet available: 6 months, 12 months — T0 too recent for full post-event window. Will populate as more trading days elapse.

📊 Highlighted takeaway

ExxonMobil Corp.'s 12-month multi-factor BHAR could not be computed due to insufficient post-event trading data.

Plain-English meaning — why the sector control matters

A simpler factor model (CAPM, FF3, FF5, FFC6) measures ExxonMobil Corp.'s return against the broader market and a few size/value/momentum factors. But ExxonMobil Corp.'s stock is also driven by sector-specific moves — when the whole sector rallies or falls together, that is not a ExxonMobil Corp.-specific event. The publication-grade FFC6+sector spec adds the relevant sector ETF (XLE) as a seventh factor, stripping out sector co-movement. The residual is the ExxonMobil Corp.-specific abnormal return — the cleanest available estimate of the event's effect on this firm's stock price.

Academic specification

For each spec M ∈ {CAPM, FF3, FF5, FFC6, FFC6+SectorETF}: estimate \(R_{i,t} - R_{f,t} = \alpha_i^M + \sum_{k \in M} \beta_{i,k}^M F_{k,t} + \varepsilon_{i,t}^M\) over the 240-day pre-event window. BHAR = compounded firm return − compounded predicted return over the post-event window. Romano-Wolf step-down adjustment uses Holm-Bonferroni upper bound across 20 tests (5 specs × 4 horizons).

References: Fama & French (1993, 2015); Carhart (1997); Lyon, Barber & Tsai (1999); Romano & Wolf (2005).

M.3 · Firm-fixed-effects pairwise BHAR (matched-pair design)

For each sector peer, computes Δ-BHAR = BH(ExxonMobil Corp.) − BH(peer) over identical post-event windows. Newey-West HAC SE on the daily Δ-return series. Cells highlighted yellow are statistically significant at 5%.
Peer 1 month3 months
Δ-BHARpΔ-BHARp
CVX+2.02%0.518+0.54%0.887
COP−3.16%0.369−4.89%0.319
EOG−1.76%0.621−5.00%0.212
MPC−3.71%0.387−12.52%0.144
PSX+0.77%0.854−7.32%0.430
SLB−6.10%0.686−17.95%0.309
OXY−5.31%0.202−8.04%0.240

Horizons not yet available: 6 months, 12 months — T0 too recent for full post-event window. Will populate as more trading days elapse.

📊 Highlighted takeaway

ExxonMobil Corp. underperformed its sector peer cohort over the post-event window: beat 2 of 7 peers at the 1-month horizon; 1 of 7 at the 3-month horizon. Pairwise differencing implements firm-fixed effects within each pair: time-invariant peer differences (sector, size, business model) drop out, leaving only the relative response to the event.

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