The Fiber Leadership Index is descriptive public-source research. Every rule that shaped the dataset is stated here.
Universe
The index publishes aggregates for 100 U.S. fixed-broadband operators, held constant across every leadership family. Company IDs, ownership taxonomy, operator archetypes, and normalized company names are fixed, so family-to-family comparisons always use the same denominator. The original Core 50 launch universe is retained unchanged inside the expanded universe for continuity.
Inclusion rule. A company is included when it operates a mass-market U.S. fixed-broadband network under its own retail brand. Eleven additional researched entities sit outside this comparability rule and are excluded from every published aggregate: wholesale-only and enterprise-focused network operators, virtual ISPs riding partner networks, managed MDU and student-housing providers, open-access entities whose retail service is delivered by other brands, and localized brands inside larger companies. Exclusion reflects operating model only; it is not a quality judgment, and the underlying research on these entities is retained internally.
Scope
Five public families are in scope: CEO, COO / Operations, CFO / Finance, Commercial, and Technology / Network. The original CEO dataset uses a July 11, 2026 snapshot and the four functional families a July 28, 2026 snapshot. The expanded 2026 universe uses an August 22, 2026 snapshot across all five families. Snapshots are labeled separately throughout.
Title mapping requires remit evidence, not just a title. Chief Growth Officer counts in Commercial only when the sourced remit covers revenue or commercial growth. CIO counts in Technology / Network only when the sourced remit covers network, product, or core operator technology. CHRO, Legal, Strategy, Construction, standalone Network Operations, and General Manager are excluded from the launch boundary.
Collection design
Each operator receives one company-centric pass covering the functional families. The research captures the current incumbent and title, supported appointment timing or directly stated tenure, appointment route, immediately prior employer, title and function, and no more than three meaningful prior operating roles.
Full career histories, board and advisor roles, education, personal details, and exhaustive transition ledgers are excluded by design.
Sources
Sources are tiered. Tier 1 - official company pages, filings, appointment releases, and owner or regulator records - is preferred. Tier 2 telecom trade and regional business reporting may support private-company facts. Tier 3 conference and public professional profiles corroborate or fill gaps. Search snippets and AI summaries are discovery tools only; they are never sources of record.
Every published raw fact resolves through an atomic fact-source link to a logged source. The expanded dataset carries tens of thousands of links across current-seat and career tables; the original accepted dataset carried 3,559. Normalized and derived fields resolve to source-backed inputs plus documented rules.
Unknowns are preserved
"Not publicly identified" means a completion pass did not locate a qualifying public incumbent. It does not prove the function is absent. "Vacant" and "role not separately constituted" require direct evidence. Missing data is never converted into a negative finding.
All CCO, Chief Customer Officer, Chief Growth Officer, Chief Business Officer, CIO, non-chief equivalent, combined-title, multiple-incumbent, segment, and parent-company mappings receive direct lead review.
Appointment route rules
- Internal requires a supported immediately prior role in the same canonical employment chain.
- External requires a supported immediately prior role outside that chain.
- Founder marks a founder or co-founder serving in the seat.
- Unknown is used when chronology does not support a classification.
Tenure is not imputed. A start date is stored only when directly supported. Direct tenure language stays a quoted data field rather than being back-calculated into a start date.
Quality assurance
- Every company-family coverage row carries a terminal disposition (500 of 500 in the published universe).
- 100% fact-to-source linkage for published facts.
- A deterministic 20% random audit (seed FLI-2026-07-28) on the original dataset, fully passing; the expanded universe passed the full acceptance-gate suite on August 22-25, 2026.
- 100% review of anomalies and ambiguous title mappings.
- Current-role reverification before public disposition.
- Counts and percentages retain explicit denominators everywhere.
Limitations
The sample is descriptive. It does not establish causation, performance, or predictive fit. Public disclosure varies by ownership model and company size, so identification rates partly reflect disclosure practice, not just organization design. Original CEO and four-family snapshots are 17 days apart and remain labeled separately; the expanded universe is a single August 22, 2026 snapshot.
This is descriptive public-source research, not an endorsement or prediction about any individual or company. No outreach of any kind occurred during collection.