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Kilroy Realty (KRC): Tenant Relationships That Drive Cash Flow — and Concentration Risk

Kilroy Realty owns, develops, and operates premier office and life-science properties primarily on the U.S. West Coast and monetizes through long-term lease-based rental revenue, escalations, and development completions. The company’s cash flow profile is dominated by a concentrated roster of large, enterprise tenants whose multi-year leases and renewal optionality anchor Kilroy’s revenue base. For counterparties and credit-focused investors looking for tenant-level transparency, NullExposure maps these relationships to help quantify tenant concentration and lease maturity risk: https://nullexposure.com/

What you need to know up front

Kilroy’s tenant book combines large technology, media, and life-science enterprises with active development leasing in high-barrier-to-entry coastal markets. Key operating signals:

  • Long-term contracting posture is explicit — Kilroy reports leases extending through 2050 with scheduled increases, which supports predictable cash flow and inflation-linked rent escalation.
  • Counterparty mix skews to large and very large enterprises, consistent with Kilroy’s focus on enterprise-grade tenants across tech, media and life sciences.
  • Geographic concentration in California (with meaningful footprints in the San Francisco Bay Area, Los Angeles, San Diego), plus targeted exposure in Washington and Austin.
  • Materiality is high: rental revenue is the principal revenue source, and the top-20 tenant cohort contributes materially to annualized base rent. These are company-level signals backed by Kilroy’s FY2025 reporting and recent earnings commentary. If you want detailed tenant-by-tenant exposure and maturity metrics, visit https://nullexposure.com/ for structured access.

Detailed tenant roll — every customer listed in Kilroy’s coverage

Below are concise, one- to two-sentence summaries for each relationship reported in the consolidated results, with source attributions drawn from Kilroy’s filings, earnings commentary, and recent press.

  • Tandem Diabetes Care, Inc. — Kilroy records a San Diego tenancy for Tandem at 15,884 sq. ft., listed among top tenants in the FY2025 10‑K table. According to Kilroy’s FY2025 Form 10‑K, Tandem is included in the company’s top-20 tenant schedule (FY2025 10‑K).

  • Viacom International, Inc. — Viacom is listed with a Los Angeles footprint of roughly 13,718 sq. ft. in Kilroy’s FY2025 tenant ranking (FY2025 10‑K).

  • Fitler Club — Kilroy announced a new 93,000 sq. ft. lease in Hollywood with the Fitler Club on the Q4 2025 earnings call, evidencing large-format leasing in Los Angeles (KRC Q4 2025 earnings call).

  • Box, Inc. — Box appears in the FY2025 top-20 tenant list with 16,853 sq. ft. in the San Francisco Bay Area (FY2025 10‑K).

  • Cruise LLC — Cruise is listed as a major tenant with 35,449 sq. ft. in the Bay Area and noted among top contributors to annualized base rent in Kilroy’s FY2025 disclosures (FY2025 10‑K; TradingView summary March 2026).

  • Cytokinetics, Inc. — Kilroy’s FY2025 table shows Cytokinetics occupying 18,167 sq. ft. in the San Francisco Bay Area (FY2025 10‑K).

  • DIRECTV, LLC — DIRECTV is recorded with approximately 16,085 sq. ft. in Los Angeles and flagged alongside material expirations spanning 2026–2027 in Kilroy’s FY2025 disclosures (FY2025 10‑K).

  • DoorDash, Inc. — DoorDash occupies 23,842 sq. ft. in the San Francisco Bay Area per Kilroy’s FY2025 top-tenant schedule (FY2025 10‑K).

  • Indeed, Inc. — Indeed is listed with 13,430 sq. ft. in Austin CBD in Kilroy’s FY2025 tenant table (FY2025 10‑K).

  • Nektar Therapeutics, Inc. — Nektar is disclosed with 12,297 sq. ft. in the Bay Area in the FY2025 top-20 tenant schedule (FY2025 10‑K).

  • Netflix, Inc. — Netflix’s Los Angeles tenancy is reported at 21,854 sq. ft. in Kilroy’s FY2025 filing (FY2025 10‑K).

  • Neurocrine Biosciences, Inc. — Neurocrine is listed with 14,397 sq. ft. in San Diego among Kilroy’s FY2025 top tenants (FY2025 10‑K).

  • Okta, Inc. — Okta appears with 24,206 sq. ft. in the Bay Area in Kilroy’s FY2025 disclosures (FY2025 10‑K).

  • Salesforce, Inc. — Salesforce is a major tenant across the San Francisco Bay Area and Seattle, shown at 24,706 sq. ft. and featured prominently in the FY2025 top-20 table (FY2025 10‑K).

  • University of California, San Francisco (UCSF) — Kilroy reported a 280,000 sq. ft. full-building lease at Kilroy Oyster Point Phase 2 to UCSF in Q4 2025, a material life-science commitment disclosed on the Q4 2025 earnings call (KRC Q4 2025 earnings call).

  • Adobe Systems, Inc. — Adobe is recorded at 27,897 sq. ft. across Kilroy’s Bay Area/Seattle positions in the FY2025 tenant listing (FY2025 10‑K).

  • Splunk, Inc. — Splunk is listed with 10,323 sq. ft. in the Bay Area per the FY2025 top-20 tenant schedule (FY2025 10‑K).

  • Stripe, Inc. — Stripe is shown with 33,110 sq. ft. in the Bay Area and is noted among top tenants contributing to annualized base rent in Kilroy’s disclosures (FY2025 10‑K; TradingView March 2026).

  • Synopsys, Inc. — Synopsys occupies 15,492 sq. ft. in the Bay Area and appears in Kilroy’s FY2025 top-20 table (FY2025 10‑K).

  • Sony Group Corporation (SNEJF) — Sony is listed with 13,382 sq. ft. in Bay Area/Los Angeles; the FY2025 10‑K entry includes the SNEJF ticker mapping (FY2025 10‑K).

  • NVDA / NVIDIA — Kilroy confirmed a new 28,000 sq. ft. lease with NVIDIA in South Lake Union during the 2024 Q3 earnings commentary, filed in transcript notes (KRC 2024 Q3 earnings call).

  • SAP — Kilroy highlighted a 118,000 sq. ft. SAP renewal in Bellevue in its 2024 Q3 earnings commentary, representing a significant regional renewal (KRC 2024 Q3 earnings call).

  • Unlearn — JLL’s March 2026 release identified Unlearn as a tenant transaction where JLL represented Unlearn and Kilroy in a San Francisco lease (JLL newsroom, March 2026).

  • Apple Inc. (AAPL) — Press reporting in March 2026 cites Apple signing a lease at 333 Dexter, a South Lake Union development being built by Kilroy (Hindustan Times, March 2026).

  • SoFi — Kilroy’s Q1 2026 earnings commentary lists SoFi as a 33,000 sq. ft. tenant at West 8th, part of recent lease-up activity (InsiderMonkey Q1 2026 earnings transcript).

  • Cooley — Kilroy referenced Cooley as an anchor tenant in a West 8th transaction that gave partners confidence to execute the deal in Q1 2026 commentary (InsiderMonkey Q1 2026 earnings transcript).

  • General Motors (GM) — General Motors executed a 43,000 sq. ft. lease at West 8th reported on Kilroy’s Q1 2026 earnings call transcript (InsiderMonkey Q1 2026 earnings transcript).

  • Harvey AI — Kilroy disclosed Harvey AI’s prior 93,000 sq. ft. lease and a subsequent 62,000 sq. ft. expansion, with occupancy occurring in April 2026, in Q1 2026 commentary (InsiderMonkey Q1 2026 earnings transcript).

  • AT&T / DIRECTV — Kilroy’s Q1 2026 commentary calls out AT&T/DIRECTV as the largest expiration next year, identifying a fourth-quarter lease expiry as material to the rollover schedule (InsiderMonkey Q1 2026 earnings transcript).

  • Amazon / AMZN — Amazon is recorded with 12,921 sq. ft. in Seattle in Kilroy’s FY2025 top-20 tenant schedule (FY2025 10‑K).

  • Riot Games (TCEHY) — Kilroy reported a 79,000 sq. ft. renewal with Riot Games in West L.A., noted on the Q4 2025 earnings call as providing several years of cash flow (KRC Q4 2025 earnings call).

  • Tubi (TUB.BRU) — Tubi is listed among tenants taking space at 201 Third during Kilroy’s lease-up from 26% to over 80% occupancy in Q1 2026 commentary (InsiderMonkey Q1 2026 earnings transcript).

  • Olema Pharmaceuticals (OLMA) — Kilroy announced a subsequent 38,000 sq. ft. lease with Olema that pushed a project to 49% leased, cited in Q1 2026 remarks (InsiderMonkey Q1 2026 earnings transcript).

  • Databricks — Databricks is named as a tenant that benefitted from renovations at West 8th and contributed to leasing momentum, referenced in Q1 2026 commentary (InsiderMonkey Q1 2026 earnings transcript).

(Every relationship above is drawn from Kilroy’s FY2025 10‑K, Q3/Q4 2024 and Q1 2026 earnings calls, and contemporaneous press reporting cited inline.)

What the constraints collectively tell investors (company-level signals)

Kilroy’s disclosures and the extracted constraint signals present a cohesive operating model:

  • Contracting posture: long-term, inflation-linked leases. Kilroy explicitly reports long-duration leases with scheduled fixed increases and renewal options; this supports stable, predictable cash flow and reduces short-term re-leasing volatility.
  • Concentration and criticality: material exposure to a top-20 tenant cohort of large enterprise tenants. Rental revenue is the principal revenue source and the top-20 tenants materially contribute to annualized base rent — a positive for revenue visibility but a concentration risk if several large tenants face simultaneous stress.
  • Geographic maturity and focus: West Coast core with targeted market diversification. Operations are concentrated in California with strategic holdings in Washington and Austin, creating both high-barrier-to-entry advantages and market concentration sensitivity.
  • Relationship roles: Kilroy acts principally as the seller/landlord and an operator/service provider through property management and project delivery. That dual role increases control over leasing outcomes but leaves exposure to tenant credit and sector cycles.

Bottom line for investors

Kilroy’s tenant roster reads like a technology and life-science blue‑chip index: large enterprises under long-term leases provide revenue stability, while geographic and tenant concentration create clear downside sensitivity around major expirations (notably AT&T/DIRECTV) and regional office/life-science cycles. For investors or operators modeling tenant-driven cash flow, Kilroy offers high visibility on rents and maturities but requires active monitoring of the top-20 tenant cohort and upcoming expirations.

For granular counterparty schedules and lease maturity analytics, explore detailed relationship mapping at https://nullexposure.com/ — the data complements public filings and earnings commentary for credit and portfolio analysis.

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