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Cartis diligence evidence schedule

DayOne–Hyperco Kouvola Data Center

PRJ-0021 · Site · Kouvola / Koria / Hiivuri, Finland

Record last updated Oct 28, 2026

Scope and capacity

A developer-issued release dated May 11, 2026 reported the topping-out of the first Koria facility; this construction milestone is not an operational opening. Hyperco, DayOne and TikTok are developing a data center in Koria, Kouvola. The first approximately 28,000 m² facility is under construction, with completion targeted for May 2027.

Headline: Not established in published records

Numbers refer to their stated physical boundaries and are not added together. Source dates, claim dates and record updates have different meanings. Missing dates and locators are not inferred.

Current status · Under construction

Actual · DayOne–Hyperco Kouvola Data Center (Project)

Claim 2291 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. YIT selected as main contractor for Kouvola data centre project

    YIT Corporation · Document date: Oct 20, 2025 · Corroborating

    Source reference: SRC-0126 · Company announcement · Recorded authority: Party primary

    Source URL

    https://www.yitgroup.com/en/news-repository/investor-news/yit-selected-as-main-contractor-for-kouvola-data-centre-project

  2. Kouvolan datakeskuksen peruskivi muurattiin

    City of Kouvola / Hyperco · Document date: Sep 11, 2025 · Primary

    Source reference: SRC-0125 · Company announcement · Recorded authority: Official primary

    Source URL

    https://www.kouvola.fi/ajankohtaiset/kouvolan-datakeskuksen-peruskivi-muurattiin-suomi-on-maailman-paras-koti-datalle/

Location · Koria / Hiivuri, Kouvola

Actual · DayOne–Hyperco Kouvola Data Center (Project)

Claim 2292 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Kouvolan datakeskuksen peruskivi muurattiin

    City of Kouvola / Hyperco · Document date: Sep 11, 2025 · Corroborating

    Source reference: SRC-0125 · Company announcement · Recorded authority: Official primary

    Source URL

    https://www.kouvola.fi/ajankohtaiset/kouvolan-datakeskuksen-peruskivi-muurattiin-suomi-on-maailman-paras-koti-datalle/

  2. Hyperco rakennuttaa uuden datakeskuksen Kouvolaan – pääkäyttäjäksi tulee TikTok

    City of Kouvola · Document date: May 6, 2025 · Primary

    Source reference: SRC-0124 · Company announcement · Recorded authority: Official primary

    Source URL

    https://www.kouvola.fi/ajankohtaiset/hyperco-rakennuttaa-uuden-datakeskuksen-kouvolaan-paakayttajaksi-tulee-tiktok/

Developer · Hyperco

Actual · DayOne–Hyperco Kouvola Data Center (Project)

Claim 2293 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Project Clover: €1 Billion Investment in Finland for New Data Center

    TikTok · Document date: May 6, 2025 · Primary

    Source reference: SRC-0123 · Company announcement · Recorded authority: Party primary

    Source URL

    https://newsroom.tiktok.com/en-eu/finlanddatacenter

  2. Hyperco rakennuttaa uuden datakeskuksen Kouvolaan – pääkäyttäjäksi tulee TikTok

    City of Kouvola · Document date: May 6, 2025 · Corroborating

    Source reference: SRC-0124 · Company announcement · Recorded authority: Official primary

    Source URL

    https://www.kouvola.fi/ajankohtaiset/hyperco-rakennuttaa-uuden-datakeskuksen-kouvolaan-paakayttajaksi-tulee-tiktok/

Development partner · DayOne

Actual · DayOne–Hyperco Kouvola Data Center (Project)

Claim 2294 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Kouvolan datakeskuksen peruskivi muurattiin

    City of Kouvola / Hyperco · Document date: Sep 11, 2025 · Primary

    Source reference: SRC-0125 · Company announcement · Recorded authority: Official primary

    Source URL

    https://www.kouvola.fi/ajankohtaiset/kouvolan-datakeskuksen-peruskivi-muurattiin-suomi-on-maailman-paras-koti-datalle/

  2. Finland Data Center — Lahti & Kouvola

    DayOne Data Centers · Document date: Not stated · Corroborating

    Source reference: SRC-0127 · Fact sheet · Recorded authority: Party primary

    Source URL

    https://dayonedc.com/market/finland

Principal user · TikTok

Actual · DayOne–Hyperco Kouvola Data Center (Project)

Claim 2295 · Recorded claim type: Actual · Review: Approved · Claim date: May 6, 2025

  1. Project Clover: €1 Billion Investment in Finland for New Data Center

    TikTok · Document date: May 6, 2025 · Primary

    Source reference: SRC-0123 · Company announcement · Recorded authority: Party primary

    Source URL

    https://newsroom.tiktok.com/en-eu/finlanddatacenter

  2. Hyperco rakennuttaa uuden datakeskuksen Kouvolaan – pääkäyttäjäksi tulee TikTok

    City of Kouvola · Document date: May 6, 2025 · Corroborating

    Source reference: SRC-0124 · Company announcement · Recorded authority: Official primary

    Source URL

    https://www.kouvola.fi/ajankohtaiset/hyperco-rakennuttaa-uuden-datakeskuksen-kouvolaan-paakayttajaksi-tulee-tiktok/

Tiktok announced investment · €1,000,000,000

Transaction scope · DayOne–Hyperco Kouvola Data Center (Project)

Claim 2296 · Recorded claim type: Transaction scope · Review: Approved · Claim date: May 6, 2025

  1. Project Clover: €1 Billion Investment in Finland for New Data Center

    TikTok · Document date: May 6, 2025 · Primary

    Source reference: SRC-0123 · Company announcement · Recorded authority: Party primary

    Source URL

    https://newsroom.tiktok.com/en-eu/finlanddatacenter

Foundation stone · Laid 2025-09-11

Actual · Koria first data-center facility (Phase)

Claim 2297 · Recorded claim type: Actual · Review: Approved · Claim date: Sep 11, 2025

  1. Kouvolan datakeskuksen peruskivi muurattiin

    City of Kouvola / Hyperco · Document date: Sep 11, 2025 · Primary

    Source reference: SRC-0125 · Company announcement · Recorded authority: Official primary

    Source URL

    https://www.kouvola.fi/ajankohtaiset/kouvolan-datakeskuksen-peruskivi-muurattiin-suomi-on-maailman-paras-koti-datalle/

Main construction start · Late October 2025

Actual · Koria first data-center facility (Phase)

Claim 2298 · Recorded claim type: Actual · Review: Approved · Claim date: Oct 20, 2025

  1. YIT selected as main contractor for Kouvola data centre project

    YIT Corporation · Document date: Oct 20, 2025 · Primary

    Source reference: SRC-0126 · Company announcement · Recorded authority: Party primary

    Source URL

    https://www.yitgroup.com/en/news-repository/investor-news/yit-selected-as-main-contractor-for-kouvola-data-centre-project

Building area · 28,000 square metres

Reported rounded · Koria first data-center facility (Phase)

Claim 2299 · Recorded claim type: Reported rounded · Review: Approved · Claim date: Oct 20, 2025

  1. YIT selected as main contractor for Kouvola data centre project

    YIT Corporation · Document date: Oct 20, 2025 · Primary

    Source reference: SRC-0126 · Company announcement · Recorded authority: Party primary

    Source URL

    https://www.yitgroup.com/en/news-repository/investor-news/yit-selected-as-main-contractor-for-kouvola-data-centre-project

Tiktok operation target · End of 2026

Forecast · Kouvola customer delivery (Phase)

Claim 2300 · Recorded claim type: Forecast · Review: Approved · Claim date: Apr 7, 2026

Conflicting public evidence is preserved.

  1. TikTok announces additional €1 Billion investment in Finland

    TikTok · Document date: Apr 7, 2026 · Primary

    Source reference: SRC-0121 · Company announcement · Recorded authority: Party primary

    Source URL

    https://newsroom.tiktok.com/tiktok-announces-additional-1-billion-investment-in-finland?lang=en-150

Contractor completion target · May 2027

Forecast · Kouvola customer delivery (Phase)

Claim 2301 · Recorded claim type: Forecast · Review: Approved · Claim date: Oct 20, 2025

Conflicting public evidence is preserved.

  1. YIT selected as main contractor for Kouvola data centre project

    YIT Corporation · Document date: Oct 20, 2025 · Primary

    Source reference: SRC-0126 · Company announcement · Recorded authority: Party primary

    Source URL

    https://www.yitgroup.com/en/news-repository/investor-news/yit-selected-as-main-contractor-for-kouvola-data-centre-project

Site capacity · Undisclosed

Proposal · DayOne–Hyperco Kouvola Data Center (Project)

Claim 2303 · Recorded claim type: Proposal · Review: Approved · Claim date: Not stated

  1. YIT selected as main contractor for Kouvola data centre project

    YIT Corporation · Document date: Oct 20, 2025 · Corroborating

    Source reference: SRC-0126 · Company announcement · Recorded authority: Party primary

    Source URL

    https://www.yitgroup.com/en/news-repository/investor-news/yit-selected-as-main-contractor-for-kouvola-data-centre-project

  2. Project Clover: €1 Billion Investment in Finland for New Data Center

    TikTok · Document date: May 6, 2025 · Primary

    Source reference: SRC-0123 · Company announcement · Recorded authority: Party primary

    Source URL

    https://newsroom.tiktok.com/en-eu/finlanddatacenter

  3. Finland Data Center — Lahti & Kouvola

    DayOne Data Centers · Document date: Not stated · Corroborating

    Source reference: SRC-0127 · Fact sheet · Recorded authority: Party primary

    Source URL

    https://dayonedc.com/market/finland

Data security program · TikTok Project Clover

Actual · DayOne–Hyperco Kouvola Data Center (Project)

Claim 2305 · Recorded claim type: Actual · Review: Approved · Claim date: May 6, 2025

  1. Project Clover: €1 Billion Investment in Finland for New Data Center

    TikTok · Document date: May 6, 2025 · Primary

    Source reference: SRC-0123 · Company announcement · Recorded authority: Party primary

    Source URL

    https://newsroom.tiktok.com/en-eu/finlanddatacenter

Counterparties and capital

City of Kouvola · Government authority · CMP-0090

DayOne Data Centers · Developer · CMP-0071

Hyperco Fin HoldCo 1 Oy · Owner · CMP-0089

Hyperco Oy · Developer · CMP-0088

TikTok · Tenant · CMP-0072

YIT Corporation · Contractor · CMP-0091

Investment commitment

€1,000,000,000 · May 6, 2025

TikTok Project Clover investment; not property valuation, Hyperco financing or DayOne capital.

Hyperco Oy (Other) · TikTok (Sponsor)

Sources (1)

Financing record 20; claim-specific source links appear in the exhibit sources where published.

This schedule captures public Cartis research. It is not a title, lien or legal-opinion report. Document page/section locators and claim review timestamps are included only when published; this version has no separate locator or claim-review-time feed.