ExxonMobil Corp. (XOM) — Reincorporation detail

Why this firm matters

At $609.3B pre-move market value, ExxonMobil Corp. is among the largest firms in the cohort and carries disproportionate weight in market-value-weighted aggregates.

Controller & ownership

Diffuse / non-controlled

Ownership concentration data not yet documented for this firm.

Source: Widely held, no controlling shareholder

Vote outcome — reincorporation proposal

Approval standard: Per DEF 14A 0001193125-26-147614: favorable vote of a majority of votes cast; transaction effected through plan of merger under NJBCA Title 14A Chapter 10 + TBOC merger provisions. Meeting type: annual.

For

2,216,403,048

Against

896,852,562

Abstain

30,111,060

71.2% approval (Majority of votes cast at the May 27, 2026 special meeting per DEF 14A Item 4 (merger-with-subsidiary / holding-company redomiciliation; abstentions count for quorum but not for voting))

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

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

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

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

Best estimate of true effect = +0.02%. 95% credibility range: [âˆ’1.48%, +1.53%]. A âˆ’2% governance discount has 0.40% probability of being true; a âˆ’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

Adding BNO to the market model raises RÂ² from 0.22 to 0.55. Î²_BNO = 0.488, t = 12.6, p < 10â»Â²â·. F(1, 217) = 158.5 (p < 10â»Â¹â¶).

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)

Specification	Day-0 AR	Inference
Synthetic control (21-donor energy peer pool)i	-0.11%	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 + WTI) 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 âœ“. — 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); RÂ² = 0.771 (fraction of pre-event variance explained); Durbin-Watson = 1.88 (no autocorrelation). — Higher correlation + higher RÂ² + 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.

IR — https://investor.exxonmobil.com/
EDGAR — https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0000034088&type=&dateb=&owner=include&count=40
Proxy — https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0000034088&type=DEF+14A&dateb=&owner=include&count=40
PRE 14A · 0001193125-26-098908 — filing →
Note. PRE 14A 0001193125-26-098908 (filed 2026-03-10); DEF 14A 0001193125-26-147614 (filed 2026-04-08); DEFA14A response filings 2026-05-12 (Glass Lewis) + 2026-05-15 (ISS)

Classification & audit trail

Bucket

D

Panel eligibility

PANEL_A_post_SB29

Audit status

TIER3_REVIEWED_REV61

Source confidence

VERIFIED_PROXY

Transaction status

PENDING

Audit notes

[rev61 2026-05-18] Tier-3 data-audit BLOCK landed: mechanism reclassified from 'Conversion' to merger / holding-company redomiciliation via plan of merger. DEF 14A 0001193125-26-147614 filed 2026-04-08; PRE 14A 0001193125-26-098908; record date 2026-04-01; board recommends FOR. Vote 2026-05-27. Post-vote: 8-K Item 5.07 (within 4 business days) + Certificate of Merger filings (NJ DORES + TX SOS) will close out the audit trail. R3 post-vote dispatch queued. [2026-05-27 v6-rev94] Vote APPROVED at May 27, 2026 special meeting. Source (interim, pending 8-K Item 5.07): Bloomberg Law, "Exxon Investors Approve Texas Redomicile Plan" (May 27, 2026), https://news.bloomberglaw.com/esg/exxon-investors-approve-texas-redomicile-plan. Exact for/against tally + approval_pct + vote_source_8k_accession to populate when ExxonMobil files its 8-K Item 5.07 (deadline 4 business days, so by 2026-06-03). First S&P 100 issuer to complete a Tornetta-era DE-outbound redomestication; previously only TSLA had done a Tier-1 reincorporation.