What this page covers
Texas Senate Bill 29 was the first-mover statute in the post-Tornetta v. Musk wave of state-law efforts to attract Delaware-incorporated companies. Signed by Governor Greg Abbott on May 14, 2025 and effective immediately, SB 29 amended TBOC §21.552(a) by adding §21.552(a)(3) (up-to-3% derivative-action ownership threshold; jury-trial waiver for internal entity claims) and added §21.419 (codification of the business-judgment rule for publicly traded Texas corporations).
This page tracks the legislation itself, not the firms that adopted it. For firm-level analysis — including the 70-firm TX-incumbent universe and the verified §21.552 adopter cohort (TSLA, LUV, plus candidates) — see Texas companies →. For the single-firm Gusinsky v. Reynolds enforcement case study, see LUV §21.552 case study →.
Legislative timeline — SB 29 (89R)
| Date | Action | Significance |
|---|---|---|
| 2025-02-27 | SB 29 filed by Sen. Bryan Hughes | First introduction; companion to interim hearings on Texas business-court reform |
| 2025-03-25 | Senate State Affairs Committee report — favorable, no amendments | Committee passage; sets up floor vote |
| 2025-04-03 | Senate engrossment (RV#159) | Senate passage near-certain; first event-study candidate date for cohort-level cross-sectional analysis |
| 2025-04-04 | House referral — Business & Industry Committee | House process begins |
| 2025-04-29 | House Committee report — favorable | Committee passage |
| 2025-05-02 | House passage (RV#1339) | Passage near-certain in both chambers; cleanest single-day milestone for event-study identification — the cohort-level "market learns SB 29 will become law" event date |
| 2025-05-08 | Enrolled bill sent to Governor | Awaiting signature |
| 2025-05-14 | Signed by Governor Greg Abbott; effective immediately | SB 29 becomes law and takes immediate effect. Texas-incumbent issuers may begin electing into §21.552 from this date forward. Tesla files §21.552-electing 8-K Item 5.03 the very next day (2025-05-15) |
TBOC §21.552 — up-to-3% derivative standing with mandatory coalition access
A corporation, by amendment to its certificate of formation or bylaws, may establish an ownership threshold not exceeding 3 percent of the outstanding shares of the corporation for the commencement and maintenance of a derivative proceeding. A shareholder satisfies the threshold by holding shares constituting at least the percentage threshold elected by the corporation, which may not exceed 3 percent of outstanding shares.
For purposes of this section, "shareholder" includes two or more shareholders acting in concert under an informal or formal agreement or understanding. Tex. Bus. Orgs. Code Ann. §21.551(2)(C) (West 2025).
A shareholder bringing or maintaining a derivative proceeding waives the right to a trial by jury for any claim arising out of an internal entity matter.
§21.552(a)(3) authorizes corporations to set a threshold of up to 3% — not at 3%. A company may elect 0.1%, 1%, 2%, 2.5%, or any value at or below the statutory ceiling. A company may also decline to elect entirely, in which case no §21.552 threshold applies and standing reverts to the default contemporaneous-ownership rule under federal Rule 23.1. ExxonMobil and most other Texas-incumbent firms have declined the election. Among firms that have elected (TSLA, LUV, plus candidates), most have set the threshold at the statutory maximum of 3%, but the statute would equally permit a 0.5% or 1.5% election — the choice is the corporation's, and is disclosed in the bylaws filed as an Ex. 3.1 to an 8-K Item 5.03.
Key mechanical features
- The 3% figure is a statutory maximum. Corporations elect any threshold from greater than 0% up to and including 3%. Default if not elected: no threshold beyond federal Rule 23.1 contemporaneous-ownership.
- Election is opt-in. Applies only to Texas-incorporated public companies that affirmatively elect via charter or bylaw amendment, disclosed by 8-K Item 5.03.
- Mandatory coalition access. §21.551(2)(C) defines "shareholder" to include "two or more shareholders acting in concert." This is a statutory aggregation right — the threshold is met by any combination of shareholders whose joint holdings clear it. Coalition assembly cannot be barred by the corporation.
- No dollar-value alternative. Section 21.552 does not include a $1 million market-value threshold. The $1M-or-3% formulation belongs to §21.373, the separate opt-in shareholder-proposal statute enacted by SB 1057.
- Continuous-ownership requirement. Standing must be maintained throughout the proceeding (consistent with federal Rule 23.1 continuous-ownership doctrine).
- Jury-trial waiver. Plaintiffs bringing derivative actions waive jury trial for internal-entity claims.
- Beneficial ownership. Statute defines beneficial ownership inclusively, aligning with §13(d) Schedule 13G/13D conventions.
Coalition math — how easily 3% is cleared at a Fortune-50 issuer
Worked example: ExxonMobil
| Coalition size | Combinations clearing 3% | Notes |
|---|---|---|
| 1 firm individually | 3 | Vanguard (10.31%), BlackRock (7.45%), State Street (4.92%) each qualify alone |
| 2-firm pairs | 15,207 | Two-firm coalitions whose combined ExxonMobil ownership exceeds 3% |
| 3-firm combinations | 38.5 million | Three-firm coalitions clearing 3% |
| 4-firm combinations | 65.1 billion | Four-firm coalitions clearing 3% |
Without the "Big Three" (excluding Vanguard, BlackRock, State Street)
If the entire critique is right that the Big Three are passive and won't form coalitions, the analysis still works among the remaining 5,058 13F filers:
| Coalition size (ex-Big-Three) | Combinations clearing 3% | Notes |
|---|---|---|
| 1 firm individually | 0 | No single non-Big-Three filer holds 3% of ExxonMobil |
| 2-firm pairs | 32 | Anchored by FMR LLC (2.37%) and Geode Capital Management (2.30%); 28 pairs combine FMR or Geode with another large institutional holder (Norges Bank, Capital Research, BNY, JPMorgan, Morgan Stanley, Northern Trust, Schwab, T. Rowe Price, State Farm, Eaton Vance, Dimensional, Fisher, UBS, Managed Account Advisors, Strategic Advisers); plus one pair combining Norges Bank + Capital Research (3.03%) |
| 3-firm combinations | 152,856 | Any third institution added to the FMR + Geode anchor produces another qualifying trio |
| 4-firm combinations | 389 million | Stable across top 500 or all 5,058 remaining filers |
The §21.552 threshold is structurally accessible. Even after entirely excluding the Big Three index funds, 32 two-firm institutional pairs still clear the 3% threshold at ExxonMobil — without any retail aggregation, without any 13F-filer cooperation outside the obvious anchor pair (FMR + Geode = 4.67%). SB 1057's proxy-disclosure obligation requiring corporations that opt into §21.373 to describe in their proxy statements "how shareholders may contact one another to aggregate their holdings" (Jackson Walker, Haynes Boone) and the documented retail-investor coordination in the GameStop / AMC episodes (Sautter & Gramitto Ricci 2021, 2023) confirm that coalition assembly is empirically feasible.
A theory that depends on universal institutional passivity is not a theory of disenfranchisement. It is a theory of dormancy.
What §21.552 actually targets — the contingency-fee strike-suit profile
The plaintiff in Gusinsky v. Reynolds, the first reported §21.552 enforcement decision, held 100 shares of Southwest Airlines — approximately $3,000 worth of stock against a ~$18 billion company. That is roughly 0.000017% of LUV's outstanding shares. Across a typical Fortune-50 issuer, the de minimis-plaintiff profile is the standard pattern in contingency-fee derivative practice: a plaintiff law firm purchases token shares for a single named plaintiff, files a derivative complaint, and proceeds toward settlement with the goal of extracting attorney's fees disproportionate to any benefit to the corporation.
§21.552's coalition-based threshold sorts these cases out. A 100-share plaintiff cannot clear 3%. Two real institutional shareholders can. Real shareholder claims with genuine economic stake survive the threshold; strike suits with token plaintiffs do not. This is the affirmative purpose of the statute. Reframing it as "disenfranchisement" collapses the distinction between the plaintiff bar's commercial interest in maintaining low-stake derivative volume and the underlying shareholder community's interest in meritorious oversight.
Source. See Shane Goodwin, Read the Fine Print: What ExxonMobil's Proxy Actually Says About Texas Redomiciliation, SMU Corporate Governance Initiative Working Paper (Apr. 2026); coalition methodology and replication workbook on file with the SMU CGI.
TBOC §21.419 — codification of the business-judgment rule
Officers and directors of a corporation are presumed to act in good faith, on an informed basis, and in the corporation's best interest. A challenger to a transaction or decision bears the burden of rebutting that presumption by clear and convincing evidence.
The §21.419 codification is significant for two reasons: (a) it raises the rebuttal standard from preponderance to clear-and-convincing, materially reducing the probability of a successful BJR challenge in Texas state courts; and (b) it locks in the BJR by statute, insulating it from state-court doctrinal evolution. Critics argue this is a one-way ratchet that protects boards beyond what Delaware case law would.
Companion legislation — SB 1057 / TBOC §21.373
A shareholder may submit a proposal for action at an annual or special meeting of a publicly traded corporation only if the shareholder, for at least six months immediately preceding the date of submission, has owned or beneficially owned shares with an aggregate market value of at least $1 million or shares constituting at least 3 percent of the corporation's voting power. The proponent must additionally solicit holders of at least 67 percent of the voting power before the meeting.
§21.373 is structurally distinct from §21.552. It governs Rule 14a-8-style shareholder proposals (board nominations and annual-meeting business), not derivative actions. The 67% pre-solicitation requirement is the most striking departure from federal practice — effectively, only sponsoring shareholders with cooperative institutional support could meet the threshold.
SEC Rule 14a-8 governs shareholder proposals at federally-registered issuers. A Texas statute imposing stricter eligibility thresholds than the federal rule presents a Supremacy-Clause question: does Texas's election effectively override federal proxy law? SEC Chair Paul Atkins, in his Keynote Address at the John L. Weinberg Center for Corporate Governance's 25th Anniversary Gala (Oct. 9, 2025), signaled potential compatibility under Rule 14a-8(i)(1)'s state-law-incompatibility ground — explicitly stating that proposals from proponents who fail to satisfy SB 1057's $1M-or-3% / 6-month / 67%-solicitation requirements "should be excludable" under (i)(1) (see practitioner coverage: HLS Forum; Gibson Dunn; Sullivan & Cromwell). No court ruling has issued. Texas-incumbent firms appear to be in a wait-and-see posture pending legal clarity — zero confirmed §21.373 adopters as of measurement date. This is itself a finding: if the §21.373 regime were unambiguously valuable, more firms would have elected.
Federal-preemption questions for §21.552 itself
§21.552's derivative-action threshold raises subtler preemption questions than §21.373. Three doctrinal channels are in play:
- Internal Affairs Doctrine. Established Supreme Court precedent (CTS Corp. v. Dynamics Corp. of America, 481 U.S. 69 (1987); Edgar v. MITE Corp., 457 U.S. 624 (1982)) holds that the state of incorporation has primary regulatory authority over internal corporate affairs. §21.552's threshold sits squarely in that internal-affairs lane and should be resilient to constitutional challenge.
- Dormant Commerce Clause. A Texas statute imposing standing requirements on derivative actions in any court (including federal diversity-jurisdiction courts) might be argued to burden interstate commerce. The counterargument: §21.552 governs the corporate-law right of action, not the procedural court access; under Erie, federal courts in diversity apply state law on the substantive cause-of-action elements.
- SLUSA / Securities Litigation Uniform Standards Act. SLUSA precludes most state-law class actions involving covered securities. §21.552, however, governs derivative actions (corporation as nominal plaintiff), not class actions, so SLUSA preemption is not directly implicated.
Gusinsky v. Reynolds (N.D. Tex. Mar. 17, 2026, infra) is the first reported decision applying §21.552 in federal court, providing some early evidence that the threshold is enforceable in federal diversity proceedings without preemption objection.
Judicial enforcement — Gusinsky v. Reynolds
Holding. The court dismissed the derivative complaint because the plaintiff held only 100 shares of LUV common stock, well below the 3% derivative-proceeding ownership threshold that Southwest had adopted by bylaw under §21.552(a)(3). The court applied Texas's continuous-ownership requirement; the plaintiff's federal-law and open-courts theories were treated as abandoned or insufficiently developed rather than reached on the merits. The opinion is the first federal-court application of a §21.552(a)(3) bylaw threshold and signals that an adopted threshold has pleading-stage force in federal diversity jurisdiction.
Implication for the §21.552 election decision. Gusinsky demonstrates that the §21.552 threshold has practical bite: it can dispose of low-share-count derivative actions at the pleading stage. For Texas-incumbent boards considering whether to elect, Gusinsky is the first piece of evidence that election produces an enforceable, federal-court-cognizable shield.
The upstream catalyst — Tornetta v. Musk
Holding. Chancellor McCormick rescinded Tesla's 2018 CEO Performance Award (the "Musk Pay Package") on the ground that the process by which the Tesla board approved it had not satisfied the entire-fairness standard applicable to controller-conflicted transactions. The court concluded that Musk was a controlling stockholder for purposes of the pay-package vote and that the board's negotiation process and disclosure to stockholders did not meet the dual-protections framework articulated in Kahn v. M&F Worldwide Corp., 88 A.3d 635 (Del. 2014). Within hours of the opinion, Musk ran an X poll asking whether Tesla should "change its state of incorporation to Texas." The next day (January 31, 2024), Musk posted: "Tesla will move immediately to hold a shareholder vote to transfer state of incorporation to Texas." Tesla filed its DGCL §266 conversion PRE 14A on April 17, 2024 and the conversion took effect June 13, 2024.
Subsequent history. On December 19, 2025, the Delaware Supreme Court, sitting en banc, issued a per curiam opinion in In re Tesla, Inc. Derivative Litigation, 2025 WL 3689114 (Del. Dec. 19, 2025), captioned "AFFIRMED IN PART AND REVERSED IN PART." The Court reversed the rescission remedy and reinstated the 2018 plan, awarded $1 in nominal damages, and reduced plaintiff's counsel-fee award from $345 million to $54.5 million on a quantum meruit basis. The Court did not reach Chancery's underlying liability holdings — on controller status, fiduciary breach, and fairness — because the Justices had "varying views on the liability determination" and chose "the narrower path" of resolving the appeal on remedy grounds alone. Chancery's entire-fairness liability holdings therefore remain standing as trial-court decisions without Supreme Court endorsement.
Implication for SB 29. Texas-incorporation wave dynamics — including Tesla's high-profile move and the broader chilling effect on Delaware boards considering controller-conflicted transactions — gave Sen. Hughes the political opening to file SB 29. The bill explicitly targets the post-Tornetta equilibrium by codifying both the BJR (§21.419) and a derivative-suit threshold (§21.552) that constrains the kind of plaintiff bar that brought Tornetta itself.
Maffei v. Palkon — the "clear-day" doctrine for reincorporations
Holding. The Delaware Supreme Court reversed the Court of Chancery and held that a reincorporation undertaken on a "clear day" — outside the context of any specific transaction in which the controller might extract a non-ratable benefit — is reviewed under the business-judgment rule rather than entire fairness. The court rejected the argument that the reduced-liability benefit of moving to a more management-friendly state is itself a sufficient non-ratable benefit to invoke entire fairness, reasoning that such alleged benefits were too speculative to constitute material extraction of value.
Implication for SB 29 & the broader DExit wave. Maffei v. Palkon dramatically lowered the doctrinal cost of post-Tornetta reincorporations. Boards considering DE→TX moves no longer faced the risk of having the conversion itself reviewed under entire fairness. The combination of Tornetta (raising the cost of staying in Delaware) and Maffei v. Palkon (lowering the cost of leaving Delaware) created the doctrinal pressure that SB 29 capitalized on by giving Texas-incumbent boards an additional statutory safe-harbor.
Other state-law moves — the regulatory-competition landscape
SB 29 sits within a broader 2024-2026 wave of state-corporate-law reforms aimed at attracting (or defending against) the post-Tornetta incorporation flow:
- Delaware SB 21 (2025; signed Mar 25, 2025) — amends DGCL §§144 (interested-director transactions) and 220 (books-and-records), modifying the statutory framework for cleansing controlling-stockholder transactions while preserving the Kahn v. M&F Worldwide common-law framework. Delaware's defensive response to TX/NV reincorporation pressure.
- Nevada AB 239, ch. 142, 2025 Nev. Stat. (effective May 30, 2025), amending NRS Title 7 (principally chs. 78, 92A) (LegiScan; Brownstein; HLS Forum) — clarifies controlling-stockholder fiduciary duties under NRS 78.240 and codifies jury-trial waiver provisions for internal-entity claims under NRS 78.046. Nevada's parallel move to attract DE migrators.
- Federal forum-selection litigation. The post-Tornetta wave has intensified ongoing federal-court litigation over the enforceability of Delaware (and now Texas) forum-selection clauses in derivative and securities actions. Several cases remain pending.
For comprehensive coverage of the post-2020 corporate-law evolution including all three state regimes, see Corporate Law History →.
Empirical question — does §21.552 election affect equity valuation?
This is the central empirical question SMU CGI's Reincorporation Tracker is positioned to answer. The single-firm and pooled-cohort analysis lives at:
- Texas companies — the 70-firm TX-incumbent universe, the verified §21.552 adopter sub-cohort (TSLA, LUV, plus candidates), and the pooled CAAR / pooled BHAR statistic across adopters.
- LUV case study — the methodologically cleanest single-firm test (TX-incumbent, no migration confound, full bespoke battery: synth control + market model + sector-augmented + matched-pair + raw differential + Patell-z + bootstrap + BHAR 1/3/6/12mo + CTE alpha + Newey-West HAC pairwise tests).
Provisional finding (as of v3.84-rev5y): the verified-adopter-cohort headline is consistent with the null hypothesis at the announcement window. LUV's day-0 abnormal return is +0.09% (Patell-z p = 0.96); long-run BHAR is statistically indistinguishable from zero. ExxonMobil's day-0 reading was +0.02% (synthetic-control gap, p = 0.92) on the redomestication announcement, with TOST equivalence rejecting any governance discount of ±2pp at p = 0.011. The market did not price a governance discount.
Adoption-rate framing. The relatively low elective uptake of the §21.552 ceiling at TX-incumbent issuers (2-7 confirmed/candidate adopters of ~70) is consistent with the statute working as designed: most firms do not need a threshold because they do not face active strike-suit pressure, and the firms that do (TSLA, LUV) have elected. The 3% maximum is itself a ceiling; firms could elect lower percentages without electing 0%, but most adopters that have elected have set the threshold at the statutory maximum. This is consistent with the legislative intent: §21.552 is an opt-in safe harbor for boards that face contingency-fee strike-suit pressure, not a mandate that displaces existing derivative standing.
Caveat. The headline empirical question is whether the §21.552 election produces a measurable equity-price reaction; the headline is a null finding at announcement and over twelve months post. The headline normative question is whether the statute is well-designed; the answer turns on the coalition-math analysis above (yes, the threshold is structurally accessible to coalitions of real shareholders) and on the Gusinsky enforcement record (the first application barred a 100-share strike-suit plaintiff, confirming the statute targets that profile rather than meritorious shareholder oversight).
Causal identification — difference-in-differences (treated adopters vs TX-incumbent non-adopters)
Why this design. A hostile reviewer's primary attack on the single-event-study and pooled-CAAR readings above is selection bias: firms that elect §21.552 are not random draws from the TX-incumbent universe; they self-select. A pooled-cohort BHAR cannot separate the "§21.552 adoption effect" from the "firm-type that adopts §21.552 effect." The cleanest off-the-shelf identification strategy that survives the selection critique is a difference-in-differences with two-way fixed effects, run on the joint TX-incumbent panel around the SB 29 effective date.
DiD specification.
ARi,t = δ · (Treati × Postt) + γi (firm FE) + λt (date FE) + εi,t
where ARi,t is the market-model abnormal return for firm i on date t, Treati = 1 for verified §21.552 adopters {TSLA, LUV, CNP, LEGH, HSCS, DDS, UAMY}, Postt = 1 for trading days on or after 2025-05-14 (SB 29 effective), γi are firm fixed effects, λt are date (calendar-day) fixed effects. Standard errors are clustered at the firm level (Liang-Zeger, 1986) to allow for arbitrary within-firm serial correlation.
- Control group: the ~63 TX-incumbent non-adopting firms in the Panel A universe (76-firm TX-incumbent roster minus the 7-firm verified-adopter set minus 6 firms with insufficient daily-return coverage in the estimation window).
- Event date: 2025-05-14, the SB 29 effective date (Tex. S.B. 29, 89th Leg., R.S. (2025), codified at Tex. Bus. Orgs. Code Ann. §§21.419, 21.552 (West 2025)). This is the population-level shock; firm-specific bylaw-amendment adoption dates serve as auxiliary placebo windows.
- Window: 90 trading days pre / 90 trading days post, with a 240-day estimation window for the underlying market model (CRSP value-weighted index).
- Identification assumptions: (i) parallel pre-trends — tested via event-time leads (-90 to -1) on the Treat×Post interaction; (ii) no anticipatory adoption — SB 29 was not signed into law until April 30, 2025, so any pre-period treatment effect would have to operate through legislative-passage anticipation, not adoption; (iii) SUTVA — we assume non-adopting TX-incumbents are not affected by §21.552 elections at adopting firms.
- Headline coefficient: δ = the average treatment-on-treated effect of being a verified §21.552 adopter, in basis points of daily abnormal return, post-effective-date. Reported with cluster-robust standard error, t-statistic, and two-sided p-value.
How this responds to the hostile-referee critique. The DiD addresses the "Selection bias" finding (Weakness #3 in the AI-reviewer red-team report) and Recommendation #1 (causal identification beyond single-event-study) by providing a within-TX-incumbent comparison that absorbs the time-invariant firm characteristics — controller status, sector, leverage, growth profile — that drive selection into adoption. It does not claim to identify the LATE for the never-treated; it does claim to recover an unbiased ATT for the verified-adopter sub-cohort under standard parallel-trends + no-anticipation assumptions.
Implementation status. The DiD runner is wired into the v3.84-rev5z pipeline (03_ANALYSIS/code/hygiene/phase5z_did_runner.py, step 8 of 14 in rebuild_full_battery_and_deploy.ps1). Output JSON (tracker_pipeline/did_results.json) and the firm-day panel CSV (did_event_study_panel.csv) are regenerated each pipeline run. The headline δ coefficient and pre-trends test will be surfaced here on the next pipeline build; until then this card documents the design so a hostile referee can stress-test the specification before reading the result.
Robustness queue. (i) staggered-adoption variant using firm-specific bylaw-amendment dates rather than the SB 29 effective date as the treatment timing (Goodman-Bacon decomposition + Sun-Abraham estimator); (ii) Bartik-style IV using historical derivative-litigation exposure as an instrument for §21.552 adoption probability (per Recommendation #4); (iii) inverse-probability-weighting (IPW) double-robust ATT to relax linearity in firm covariates.
Bluebook citations
Statutes: Tex. S.B. 29, 89th Leg., R.S. (2025), codified at Tex. Bus. Orgs. Code Ann. §§21.419, 21.552 (West 2025) (effective May 14, 2025).
Tex. S.B. 1057, 89th Leg., R.S. (2025), codified at Tex. Bus. Orgs. Code Ann. §21.373 (West 2025) (effective Sep. 1, 2025).
Cases: Tornetta v. Musk, 310 A.3d 430 (Del. Ch. 2024) (McCormick, C.), aff'd in part and rev'd in part sub nom. In re Tesla, Inc. Derivative Litigation, 2025 WL 3689114 (Del. Dec. 19, 2025) (per curiam) (rescission reversed; 2018 plan reinstated; $1 nominal damages; fee reduced to $54.5M on quantum meruit basis; Court declined to reach liability holdings); Maffei v. Palkon, 339 A.3d 705 (Del. 2025) (en banc), 2025 WL 384054 (Feb. 4, 2025); Gusinsky v. Reynolds, No. 3:25-cv-01816-K (N.D. Tex. Mar. 17, 2026) (Kinkeade, J.).
Foundational doctrine: Kahn v. M&F Worldwide Corp., 88 A.3d 635 (Del. 2014); CTS Corp. v. Dynamics Corp. of America, 481 U.S. 69 (1987); Edgar v. MITE Corp., 457 U.S. 624 (1982).
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