SK hynix Inc.

Semiconductor Fab

Legal name: SK hynix Inc. · HQ: KR · Public (000660) · Founded 1983

Leading high-bandwidth memory (HBM) manufacturer — the primary supplier for NVIDIA AI accelerators and the current bottleneck of the AI hardware supply chain. Record 2025 revenue on the HBM boom; committing over $30B to new fab and packaging capacity. Publishes an annual sustainability report; fab-level allocation to AI products is not disclosed.

Disclosure Quality

Score

52/100

Transparency Grade

T-3

partial disclosure

Grades run T-1 (most transparent) to T-5 (least transparent).

Red flags identified (1)

  • RF-04 · AI-specific energy use not disclosed

See the disclosure audit below for details.

Fiscal year 2026. Score computed from OpenButterfly T1–T6 disclosure framework audit. Confidence tier: C (Estimated, Documented Method).

Environmental Metrics

Fiscal year 2026. Each metric is shown at its most recent available year; rows from a different year are marked.

Confidence tiers: A measured and verified · B company-reported · C documented estimate · D uncertain estimate · E modeled · ND not disclosed.

Total Energy Consumption

9.7 TWh

≈ the annual electricity use of 922,000 US homes

method: known_capacity_model

Source: OpenButterfly pipeline

C

Scope 1 Emissions

1.42 Mt CO₂e

≈ the annual emissions of 309,000 passenger cars

method: scope1_ratio_model

Source: OpenButterfly pipeline

E

Scope 2 Emissions (market-based)

2.85 Mt CO₂e

≈ the annual emissions of 619,000 passenger cars

method: grid_carbon_model

Source: OpenButterfly pipeline

D

Scope 3 Emissions

4.12 Mt CO₂e

≈ the annual emissions of 895,000 passenger cars

method: scope3_ratio_model

Source: OpenButterfly pipeline

E

Water Withdrawal

14.1 GL

≈ 5,659 Olympic swimming pools of water

method: wue_model

Source: OpenButterfly pipeline

D

Property-Line Noise (estimated)

~59.3 dBA at property line

method: cooling_load_noise_model

Source: OpenButterfly pipeline

E

Disclosure Audit

Show 5 disclosure checks (T1–T6 framework)
T1.1

Total electricity consumption disclosed

Total electricity disclosed in the annual sustainability report (~9-10 TWh).

Fully Disclosed
T1.2

AI-specific energy consumption disclosed

HBM production lines — the AI-critical output — are not separately attributed.

RF-04 (AI-specific energy use not disclosed)

Not Disclosed
T2.1

Scope 1 GHG emissions disclosed

Scope 1 disclosed including process gases (semiconductor manufacturing is Scope-1-heavy).

Fully Disclosed
T3.1

Total water withdrawal disclosed

Water withdrawal disclosed annually; fabs are highly water-intensive.

Fully Disclosed
T6.1

GHG accounting methodology documented

GHG Protocol referenced; K-ESG and DART disclosure with assurance.

Fully Disclosed

Sources

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