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The coalition · founder-controller dynamic + institutional thresholds

A founder-controller and the Texas threshold math.

Bottom line. Tesla's classification has evolved with the statutory landscape. Elon Musk holds approximately 20.3% of voting power per the most recent definitive proxy — below the strict NYSE/Nasdaq listing-rule threshold for a "controlled company" (Rule 303A.00 / 5615(c)'s >50% requirement). The Delaware Court of Chancery in Tornetta v. Musk (Del. Ch. January 2024) initially designated Musk a controlling shareholder for entire-fairness purposes at the same sub-50% stake, citing process control over the board and executive selection. That common-law expansion was statutorily reversed by Delaware Senate Bill 21 (signed March 2025; amending DGCL §144), which codified the controlling-shareholder definition to require >50% economic or voting power with narrow exceptions. Under post-SB 21 Delaware law, Musk no longer satisfies any controlling-shareholder test. The SMU CGI tracker classifies Tesla as founder-significant minority (post-SB 21) — the same bucket as Affirm, The Trade Desk, and eXp World Holdings — not as a controlled company under any current definition. TBOC §21.4161's controlled-issuer carve-out is unlikely to apply to Tesla on a Texas court's reading absent some other basis for finding control.

The founder-controller dynamic

Ownership snapshot (S&P Capital IQ as of 2026-04-25)

  • Elon R. Musk — largest individual holder: 24.86% economic stake; approximately 22% of voting power. Controller type: founder / CEO.
  • Insiders aggregate: 24.95% (Tesla's filings disclose Musk and other officers/directors aggregated).
  • ≥5% individual holder list: Elon R. Musk (24.86%).
  • Is Tesla a "controlled company"? The answer depends on which definition applies, and the answer has changed over time:
    • NYSE/Nasdaq listing rule (>50%): No. Musk's ~20.3% voting stake is well below the strict threshold (Nasdaq Rule 5615(c); NYSE Rule 303A.00).
    • Delaware common-law (entire-fairness review) — pre-SB 21: Yes. Tornetta v. Musk, 310 A.3d 430 (Del. Ch. January 2024), designated Musk a controlling shareholder for entire-fairness purposes despite holding well under 50%.
    • Delaware codified (DGCL §144 post-SB 21): No. Senate Bill 21 (signed March 2025) codified the controlling-shareholder definition to require >50% economic or voting power, statutorily reversing Tornetta's common-law expansion. Musk satisfies no Delaware controlling-shareholder test under current law.
    • Texas TBOC §21.4161 (controlled-issuer carve-out): Unlikely to apply absent independent basis. The §21.4161 carve-out was drafted post-Tesla-reincorporation; with Delaware's statutory reversal of Tornetta, no surviving common-law doctrine supplies controlling-shareholder status at sub-50%. Texas courts would have to construct an entirely new sub-50% controlling-shareholder doctrine to bring Tesla within §21.4161.

The founder-controller dynamic creates a power asymmetry standard event-study identification doesn't directly model: the marginal trader does not fully set price when a founder-controller could credibly deliver a discontinuous corporate action (e.g., another redomiciliation, a take-private, a special dividend). The /stress_tests page documents how this asymmetry interacts with the Day-0 abnormal-return tests.

The institutional coalition — pending 13F snapshot

Pending verification — 13F-family ownership snapshot for Tesla

The coalition arithmetic below requires the canonical 13F-family ownership snapshot (S&P Capital IQ Public Ownership Detailed) as of Tesla's pre-event date. Pending that snapshot, the standard fields are shown with [DATA PENDING] placeholders.

Measure Tesla value
Total 13F-family filers in the universe[DATA PENDING]
Filers individually exceeding the §21.373 $1M threshold[DATA PENDING]
Two-holder combinations clearing the §21.552(a)(3) 3% derivative threshold[DATA PENDING]
Vanguard + BlackRock + State Street combined %[DATA PENDING]
Position-date breakdown[DATA PENDING]
Controller stake (Musk)20.3% voting power (founder-CEO; founder-significant minority post-SB 21 (Tornetta superseded))

Tesla's TBOC §21.552 election — May 15, 2025

Primary source · Form 8-K Item 5.03 (accession 0001104659-25-050072)

On May 15, 2025 — the same day Texas Senate Bill 29 became effective — Tesla filed a Form 8-K reporting that its board had amended the corporation's bylaws to elect into TBOC §21.552, the SB 29-introduced carve-out that imposes a 3% aggregate voting-power threshold for derivative-action standing and a $1 million / 6-month holding threshold under §21.373 for shareholder proposals. Tesla is one of the earliest publicly-traded firms to make this election. The bylaw amendment took immediate effect under TBOC §21.057.

The Day-0 announcement-window event-study response to Tesla's §21.552 election is reported on the /evidence page. The market-model abnormal return for the May 15, 2025 event was −2.72% (Patell-z p = 0.42; not statistically significant). The sector-augmented model (SPY + XLY) reported essentially zero (+0.06%, p = 0.98). Either way, the §21.552 election was empirically a non-event for Tesla's share price.

The "do thresholds matter for Tesla?" question

Two conditions independently matter: (1) has Tesla opted into SB 29 / SB 1057 thresholds? Yes — as of May 15, 2025, by board action (see §21.552 election section above). (2) Can the institutional coalition clear the thresholds, and what does the founder-controller dynamic do to coalition incentives? In the cross-firm cohort, the ExxonMobil canonical demonstrates the pattern: even where a firm opts into the 3% derivative threshold, the existing institutional shareholder base can typically clear it via two-holder coalitions. Tesla's coalition math is structurally different because of the rev66 founder-significant-minority (post-SB 21) classification — Musk's ~20.3% voting block is not a coalition member, it is a counterweight to coalitions.

Specifically: a hypothetical two-holder coalition combining Vanguard and BlackRock (assuming each holds ~7-9% of Tesla on standard institutional benchmarks) would clear the 3% §21.552(a)(3) derivative threshold in isolation, but Musk's ~20.3% counter-position can be voted at any meeting against derivative-suit-supportive proposals. The litigation-funding economics also differ: derivative actions against Musk in Texas, post-§21.4161, face jury-trial-waiver requirements and standing-rule modifications that Delaware Chancery practice did not impose. The cross-firm placebo on /evidence reports how Tesla ranks among the post-Tornetta 29-firm distribution.

Primary sources

Ownership data

  • S&P Capital IQ Public Ownership Detailed (proprietary; snapshot dated 2026-04-25) — ticker Tesla
  • Tesla DEF 14A 2024 — Beneficial Ownership table
  • Tesla 13D/G filings on EDGAR

Full Bluebook-format citations in SOURCES.md.