Finding, as of 13 October 2026: The public material reviewed does not establish 1GW of Indian data-centre capacity attributable to GIC and Temasek. It establishes several different things: Temasek’s past platform-level support for STT GDC; a later sale of STT’s remaining stake to KKR and Singtel; Temasek’s company-level interests in Keppel, Sembcorp and Mapletree; exploratory or unconfirmed India project leads; and large capacity numbers that refer to different geographies, stages and infrastructure types.

The first question is not “How do we add the megawatts?” It is “Which legal entity owns or operates each project, who invested in that entity, what exactly does the MW measure, and when was its stage reported?” Without those links, a portfolio stake is not project funding, and an operator’s entire footprint is not an investor’s attributable capacity.

The strongest India trail is STT GDC. Temasek has said that its 2020 investment supported STT GDC’s platform build-out, and in July 2026 said STT had sold its remaining 82% stake to KKR and Singtel. Singtel’s February transaction release set out the post-completion 75:25 KKR–Singtel ownership split; STT GDC announced that the transaction had completed on 2 September. The same company’s India figure—more than 613MW of IT capacity across 34 centres—includes sites under development and held for further development. It is not a 613MW live-capacity figure, and it is not a GIC/Temasek-attributable total. Temasek, 8 July 2026 · Singtel, 4 February 2026 · STT GDC, 2 September 2026

GIC’s connection is less settled. Secondary reporting described GIC as a minority investor in the STT GDC transaction. The Competition Commission of India’s public summary names a vehicle called Sunstone Investment as acquiring an economic interest, but does not connect Sunstone to GIC. The closing release names the KKR-led consortium with Singtel; the public record reviewed here does not disclose a GIC percentage or a project-level Indian MW allocation. That is an unresolved ownership link—not evidence that a hidden gigawatt exists. CCI/PIB, 15 July 2026 · The Business Times, 2 February 2026, updated 4 February

The short answer: five routes, five different ledgers

Entity or platform Verified relationship in the trail India data-centre capacity found Best-supported India stage What the number does—and does not—mean
STT GDC India Historically within ST Telemedia’s platform; Temasek says it supported the platform build-out in 2020. STT GDC India was described as a 74:26 STT GDC–Tata Communications JV in a 2024 CCI order. STT’s remaining 82% parent stake was sold to KKR/Singtel in 2026. >613MW IT capacity in the September 2026 company snapshot Mixed; company says the India figure includes development and further-development sites. Named project examples below include operator-listed live and under-development facilities. A platform snapshot, not an investor-attributed total or a live-only number. The JV percentage is a separate corporate layer.
Keppel Temasek reported a 21% company holding as at 31 March 2026. No India-specific DC MW verified in the reviewed primary material Exploratory signal only: Keppel’s 2024 Q&A included India among markets where it was exploring AI-campus opportunities; no named site or capacity was identified. Keppel’s 1.2GW target was a dated global gross-power target, not India capacity.
Sembcorp Temasek reported a 50% company holding as at 31 March 2026. No India-specific DC MW verified No named India data-centre project with a public MW figure was identified. Sembcorp’s >7.6GW India figure is renewable-generation capacity in operation and under construction, not data-centre load.
Mapletree Temasek reported a 100% company holding as at 31 March 2026. Around 400MW appears in an October 2025 media report about a possible Mumbai project. Unconfirmed report; no company-confirmed project stage, site, power connection or capacity basis located. The report is not an operator announcement. Mapletree declined to comment; the figure cannot be treated as announced, U/C or live capacity.
GIC-linked routes GIC says it is a government fund manager and does not own the assets it manages. A GIC-affiliate investment in Vantage’s APAC platform is officially confirmed; its STT connection is reported but not resolved to a named vehicle in the public CCI summary. No verified GIC-attributable India MW in the routes reviewed STT: reported financial participation, vehicle/percentage unresolved. Vantage: APAC, not India. Vantage’s 1GW is operational-plus-planned APAC IT capacity across five markets, not a GIC-owned India total.

The exact holdings above are company-level percentages from Temasek’s portfolio table as at 31 March 2026. They describe shareholder exposure, not a cheque written into a particular Indian data centre, an operator’s cap table, or a proportional share of its MW. Temasek portfolio

Original editorial diagram showing Temasek’s dated company-level holdings, the STT GDC ownership change, the reported-but-unresolved GIC–STT link, and the separate Vantage APAC route. It does not assign investor-owned megawatts.

Figure 1. Ownership and economic-interest paths are not capacity-attribution paths. Solid connectors indicate relationships documented in the cited primary material; the dashed amber connector is secondary-reported and unresolved.

Why the ownership layer matters

“GIC money” and “Temasek money” are not interchangeable labels. GIC’s own FAQ says it manages Singapore’s foreign reserves as a fund manager and “does not own the assets” it manages. Singapore’s Ministry of Finance has described Temasek as an investment company that owns its assets, unlike GIC’s fund-manager role (MOF explanation). That difference affects what a public shareholding does—and does not—show.

A data centre can sit in an operating company, subsidiary, project SPV, joint venture, trust, fund or portfolio company. A sovereign investment manager may have an economic interest through a fund or co-investment vehicle without appearing as the direct legal owner. Conversely, a parent company’s broad portfolio can include power, offices, logistics, funds and data centres, while only one particular subsidiary operates the facility.

For this audit, the route has to be evidenced at each step:

  1. Investor or manager: GIC, Temasek or another institution.
  2. Named legal vehicle: direct shareholder, fund, SPV, affiliate or JV partner.
  3. Operating or project entity: the company that owns, builds, leases or runs the site.
  4. Capacity claim: India or another market; IT load, gross power, utility power, renewable generation or another unit.
  5. Dated stage: announced, under construction, operational/ready for service, or not verifiable.

A company’s label “Under Development” is reported as written; it is not automatically upgraded to physical under-construction status unless the evidence supports a construction milestone. “Live” is tied to an operator-stated operational or ready-for-service phase, not assumed customer utilization.

If a step is missing, the article says so. It does not fill the gap by multiplying an operator portfolio by an investor percentage.

STT GDC: the clearest Temasek history, but not a current Temasek-owned 1GW

What changed at the parent level

STT GDC was established by ST Telemedia in 2014. In June 2024, STT GDC, KKR and Singtel announced a S$1.75 billion investment through preference shares and warrants; ST Telemedia remained the majority shareholder at that point. In February 2026, KKR and Singtel agreed to buy ST Telemedia’s remaining 82% stake for S$6.6 billion. Singtel’s announcement said that, on completion and conversion of existing preference shares, KKR and Singtel would own 75% and 25% respectively. Temasek’s July 2026 release said the transaction had occurred earlier that year; STT GDC announced completion on 2 September 2026. Singtel, 18 June 2024 · Singtel, 4 February 2026 · Temasek, 8 July 2026 · STT GDC, 2 September 2026

That makes the phrase “Temasek owns STT GDC” out of date after the September close. There is still a separate, indirect relationship: Temasek’s portfolio page lists a 52% holding in Singtel as at 31 March 2026, and Singtel owns 25% of STT GDC after the transaction. The two percentages are dated at different points and describe different corporate layers. They do not make Temasek the direct 25% owner, and they do not establish that any given share of India’s facilities was funded by Temasek.

Temasek’s account of its 2020 investment is significant: it says the investment supported STT GDC’s platform build-out and expansion across Asian markets. That is a documented, platform-level capital history. It is not a public schedule allocating the investment to individual sites, Indian phases or MW. The later sale is also explicit, public and widely documented. It is therefore not accurate to present STT’s ownership trail as a transaction that happened “without a press release.”

The Indian operating company is another layer down

A November 2024 CCI order described STT GDC India as a 74:26 joint venture between STT GDC and Tata Communications in the context of a separate transaction review. This is a dated corporate-structure reference, not a 74%/26% split of each facility’s capacity, and not a fresh post-September-2026 ownership filing. The parent’s sale does not by itself rewrite the Indian JV’s public capacity ledger. CCI order, 5 November 2024

The September 2026 completion release reported 34 Indian data centres across 10 cities and more than 613MW of India IT capacity. STT’s India site adds the crucial qualifier: its data-centre figures include sites under development and held for further development. The operator separately reported 780MW of global operational capacity; that global operating figure and the India mixed-stage IT figure have different scopes and should not be treated as a like-for-like split. STT GDC completion release · STT GDC India locations

What can be stage-labelled inside the India figure?

STT’s India location map, checked on 13 October 2026, labels facility capacities as IT Load (MW). The examples below are a sample of that live page, not a complete inventory, and not a reconciliation of the >613MW total.

Named STT India facility Operator-listed IT load Stage evidence Editorial label
STT Jaipur 1 6MW The location page says “Ready for Service since 3rd June 2026.” Live / ready for service as stated by the operator; no claim about occupancy or full draw.
STT Chennai 4 17MW The location page lists the facility as “Under Development.” A February 2026 STT India release says the groundbreaking took place earlier that month. Groundbreaking reported; current U/C progress not independently verified. The operator’s status does not disclose sustained progress or a service date.
STT Navi Mumbai 2 49MW The location page lists the facility as “Under Development.” Development status on operator page; physical U/C not independently established. No phase-level completion date identified.
STT Palava 1 50MW The location page lists the facility as “Under Development.” Development status on operator page; physical U/C not independently established.
STT Palava 4 and 5 60.5MW each Both appear as “Under Development” on the location page. Development status on operator page; physical U/C not independently established. Do not add these again to a parent target or the 613MW snapshot.

The page itself cautions that the India data-centre figures include sites under development and held for further development. Its headline therefore cannot be re-labelled “613MW live,” nor can all of it be assumed to have crossed from announced capacity into physical construction. “Under Development” is the company’s status label; the article reports it as such, not as independent proof of construction pace, grid energisation, customer occupancy or full load.

There are other useful examples. STT India’s February 2026 Chennai release said 40MW (capacity basis not stated in that release) was operational at Ambattur and that the Siruseri facility was designed as a 45MW data centre, with a 7.2MW first phase operational. The location map lists Chennai 7 at 7MW IT load. The public material does not provide an explicit crosswalk explaining the 7.2MW operational figure versus the map’s rounded 7MW IT entry, so the figures should not be added together. The same release described about 130MW of development potential at Ambattur inclusive of existing operational capacity; the release does not provide a clear basis crosswalk for that campus potential, so it is not an additional 130MW to stack on top of the 40MW live number. STT India, 19 February 2026

These details answer the stage question better than the national total does—but they still do not show how much of each site is attributable to any shareholder. A project-status trail and an investor-ownership trail are related research tasks, not the same spreadsheet column.

Keppel: a Temasek shareholding and an India exploration signal—not Indian MW

Temasek’s portfolio snapshot lists Keppel at 21% as at 31 March 2026. That is a minority company holding, not proof that Temasek controls Keppel or funds every Keppel data-centre project.

Keppel’s October 2024 business update described a global data-centre portfolio of 650MW in gross-power capacity and a target to expand to 1.2GW. Its Q&A transcript discussed India among several markets where Keppel was exploring potential AI-campus opportunities. The transcript gave no Indian site, project SPV, land parcel, committed financing or India-specific MW. Keppel’s 2025 major-properties schedule lists Indian office developments, but no Indian data-centre property in that published schedule. The absence of a named property from a schedule is not proof that no proposal exists; it does mean the cited sources do not support an India capacity number or an Announced/U/C/Live project label. Keppel, 24 October 2024 · Keppel Q&A transcript · Keppel 2025 Major Properties

A 1.2GW figure is not evidence of 1.2GW in India. It was a global gross-power ambition announced in 2024. A later global operating portfolio, a development target, and an exploratory India conversation must remain separate. As of the research cut-off, the defensible India project entry for Keppel is “exploration reported; no site-specific MW or stage verified.”

Sembcorp: India’s renewable gigawatts are power-generation assets

Temasek’s portfolio table lists Sembcorp Industries at 50% as at 31 March 2026. Sembcorp’s India page says its renewable portfolio totalled more than 7.6GW in operation and under construction across 13 states as at 29 May 2025. Sembcorp’s FY2025 results presentation continued to describe India as a 7.6GW growth platform. These are energy-generation assets, not data-centre IT load, gross facility power or an Indian campus total. Sembcorp in India · Sembcorp FY2025 results presentation

Sembcorp can still be relevant to data centres as an energy supplier. Its FY2025 results material, for example, described a 10-year renewable power-purchase arrangement for a 20MW DayOne data-centre facility in Singapore, backed by renewable-energy certificates. That is a Singapore energy-supply relationship—not Sembcorp owning 20MW of data-centre capacity in India. In March 2026, Sembcorp Development also received investment approval for a proposed Ho Chi Minh City campus of up to 90MW computing capacity through a 49%-owned joint venture. That project is in Vietnam, not India. Sembcorp FY2025 results presentation · Sembcorp, 27 March 2026

These links may matter to a wider digital-infrastructure story, but they cannot be relabelled as Indian data-centre MW. The primary material reviewed did not identify a named Sembcorp-owned India data-centre project with an attributable capacity. That is a bounded finding about the sources checked, not a claim that Sembcorp has no commercial or power-supply relationship with any Indian data centre.

Mapletree: an official market interest, a media-reported Mumbai proposal, no verified stage

Temasek’s portfolio table lists Mapletree at 100% as at 31 March 2026. Mapletree’s FY2024/25 operations review put India among emerging Asia-Pacific data-centre markets being explored. That was market exploration, not a project announcement. The later FY2025/26 property portfolio lists the group’s assets by country and sector; its India entries are not a data-centre property. The list is a dated asset snapshot, not a full register of confidential proposals or future development rights. Mapletree FY2024/25 Operations Review · Mapletree FY2025/26 Property Portfolio

On 5 October 2025, The Financial Express reported—citing unnamed sources—that Mapletree was considering a Mumbai project of around 400MW and a US$500–700 million investment, while exploring other cities. The article said Mapletree declined to comment. It does not name the site, distinguish IT load from gross power or utility capacity, identify an Indian project company, confirm land control or a power connection, or say that construction had started. The Financial Express, 5 October 2025

That is a material lead worth a fair question, not a confirmed 400MW campus. Its stage is unverified. The $500–700 million is a reported investment estimate, not audited deployed capex. The 400MW is a reported capacity, with no public basis crosswalk. Neither number belongs in a confirmed GIC/Temasek India data-centre total.

GIC: a reported STT interest and a separate APAC 1GW

GIC’s role requires a separate test from Temasek’s. GIC describes itself as a fund manager that manages assets for Singapore’s Government and does not own the assets it manages. That does not mean it cannot invest through a fund, subsidiary or co-investment vehicle; it means the vehicle and economic interest need to be named before a reader can trace them to an operator’s India MW. GIC FAQ

For STT GDC, The Business Times reported that GIC and Mubadala were minority investors. CCI’s 15 July 2026 public summary names four entities with economic interests on a see-through basis: KKR-linked Ruby, Singtel, Sunstone and Mubadala-linked MIC Entity. It defines Sunstone as an investment SPV but does not identify its sponsor or connect it to GIC. CCI said a detailed order would follow. The September completion release names the KKR-led consortium with Singtel; the public materials reviewed still do not provide a GIC percentage or a GIC-to-Indian-project capacity allocation. The responsible line is “reported, not independently mapped to a named GIC vehicle or India MW.”

There is a confirmed GIC route elsewhere. Vantage announced that an affiliate of GIC and a wholly owned ADIA subsidiary completed a US$1.6 billion investment into Vantage’s Asia-Pacific platform in November 2025. Vantage said the platform had 1GW of operational and planned IT capacity across Australia, Malaysia, Japan, Taiwan and Hong Kong; part of the capital funded the acquisition of Yondr’s 300MW-plus Johor campus. The release names no Indian site in that 1GW footprint. It is a strong GIC/APAC data-centre story, but not an Indian 1GW and not capacity to add to STT India. Vantage, 23 November 2025

The distinction is especially important because the US$1.6 billion was an equity investment led by GIC and ADIA together; the release does not split the amount by investor. Nor does it attribute each megawatt of Vantage’s regional footprint to either investor. A disclosed capital contribution to a platform is not a disclosed project-by-project MW share.

Can the numbers be added to make 1GW?

The tempting arithmetic is easy to see: STT GDC reports more than 613MW of India IT capacity, while The Financial Express reported around 400MW for a possible Mapletree Mumbai project. “613 plus 400” passes 1,000MW on a calculator. It does not pass the evidence test.

Other large figures do not solve the problem. Keppel’s 1.2GW was global gross-power target capacity. Vantage’s 1GW was operational-plus-planned APAC IT capacity outside India. Sembcorp’s >7.6GW was India renewable-generation capacity. Each number may be valid in its own ledger; none belongs in a single GIC/Temasek India data-centre sum.

Original editorial scorecard separating the five prominent figures by geography, capacity basis, stage and attribution. The graphic marks the tempting 613-plus-400 arithmetic as non-comparable, not as a verified 1GW total.

Figure 2. Similar-looking GW/MW values are not interchangeable. Project, platform, geography, metric and stage must match before an aggregate is meaningful.

The conclusion is not that no one has an unreported project or that a future portfolio might reach 1GW. It is narrower: the sources reviewed by 13 October 2026 do not substantiate a verified 1GW of Indian data-centre capacity attributable to GIC and Temasek.

“Without a press release” is not the same as “not in one clean ledger”

Several parts of this trail were publicly announced: STT GDC’s 2024 fundraising, the February 2026 sale agreement, the July CCI approval summary, the September completion, Temasek’s account of its earlier platform support, Keppel’s global data-centre target, Sembcorp’s overseas data-centre proposal and Vantage’s GIC/ADIA APAC investment. STT’s own India site also lists individual facility names, IT-load capacities and some development statuses.

The strongest exception is the Mapletree Mumbai lead: it was reported by a newspaper citing unnamed sources, and Mapletree declined to comment. That supports “unconfirmed project report,” not “secret 400MW investment.” The other genuine gap is attribution: public statements do not line up in one place to show a current GIC/Temasek-to-India project-by-project MW ledger.

A more defensible interpretation of the title’s phrase is therefore: the information is distributed across company shareholding tables, transaction announcements, regulatory summaries, site pages and press reporting—not that the relevant investments were all made without public disclosure.

What the public trail can support today

That is a useful research map. It is not a 1GW total, proof of concealed investment or evidence that capital moved from Singapore to India.

Questions a follow-up should resolve

  1. STT GDC / CCI: Can the detailed CCI order, consortium disclosures or STT GDC clarify whether Sunstone is associated with GIC, the exact economic interest and any relevant India exposure?
  2. STT GDC India: Can the operator provide a dated project-by-project bridge for the >613MW figure, separating operational, under-construction, further-development and other announced capacity, with each site’s stated IT-load basis?
  3. Mapletree: Is there a formally approved India data-centre project, and if so, what is the legal project entity, site, capacity basis, development stage and financing status? Does the October 2025 report’s 400MW refer to IT load, gross power, utility power or a development envelope?
  4. Keppel / Sembcorp: Has Keppel moved beyond the 2024 India exploration signal? Does Sembcorp have an India data-centre project or a site-specific supply agreement that should be distinguished from its renewable-generation portfolio?

No company or executive has been contacted for this draft. The questions are publication-stage fact checks, not insinuations. Before publication, each named party should receive a fair opportunity to correct factual details or add context.

What this means for readers

For customers, developers and investors, the practical lesson is to ask for the entity and the basis before repeating an investor-linked MW number. “Temasek has a 21% stake in a developer,” “a fund co-invested in a global platform,” “an operator reports >613MW of India IT capacity,” and “a newspaper reports a 400MW proposal” are four different claims. They can all be worth tracking without turning into one number.

For market analysis, a useful trail has at least six fields: investor; legal vehicle; operator/project company; India site or portfolio scope; capacity basis; and dated stage. Add an ownership percentage only when the public record supplies it, and do not multiply that percentage by an operator’s portfolio unless the ownership and capacity scope match. A power supplier’s generation capacity and a data-centre operator’s IT load belong in linked but separate ledgers.

For “Live,” prefer dated evidence such as an operator’s ready-for-service statement or operational phase disclosure. “Under Development” is worth reporting, but it is not a proxy for energisation, commissioning, tenant handover, occupancy or full power draw. “Announced” should describe a named project with a source and date; an exploratory comment or unnamed-source report should remain in its own category.

Related Gridvik guides, verified live on 13 October 2026:

Frequently asked questions

Does Temasek still directly own STT GDC?

Not after the KKR/Singtel transaction completed on 2 September 2026. KKR holds 75% and Singtel 25% under the announced post-completion structure. Temasek’s portfolio page lists a 52% holding in Singtel as at 31 March 2026, which is a separate indirect exposure—not direct ownership or control of STT GDC.

Is GIC confirmed as an STT GDC investor?

Secondary reporting described GIC as a minority investor. CCI’s July 2026 summary identifies Sunstone Investment as an SPV with an economic interest, but the summary does not link Sunstone to GIC or disclose GIC’s percentage. The reviewed primary sources do not allow a project-level GIC-to-India-MW attribution.

Is STT GDC’s India >613MW figure live capacity?

No. STT’s September 2026 completion release and India site report more than 613MW of India IT capacity, while STT’s site note says the India figure includes sites under development and held for further development. STT has separate live/RFS examples, but the national total does not publish a complete stage split.

Is Mapletree’s reported 400MW Mumbai project under construction?

That was not established in the sources reviewed. The October 2025 report cites unnamed sources and says Mapletree declined to comment. It does not provide a site, project entity, capacity basis or construction evidence.

Does Keppel have 1.2GW of Indian data-centre capacity?

No. Keppel’s 1.2GW was a global gross-power target announced in 2024. The company’s India reference was exploratory and did not include a named project or India-specific MW.

Does Sembcorp’s 7.6GW count as data-centre capacity?

No. The dated figure describes renewable-generation assets in operation and under construction across India. Power generation and data-centre IT load are different infrastructure metrics.

Is Vantage’s 1GW a GIC-backed India number?

No. Vantage described 1GW of operational and planned IT capacity across Australia, Malaysia, Japan, Taiwan and Hong Kong. The announced GIC-affiliate and ADIA investment was into Vantage’s APAC platform; the release does not include India in that five-market footprint.

Bottom line

There is a traceable story here, but it is not yet a verified “invisible 1GW.” Temasek’s STT history is public; STT’s ownership changed; STT India publishes a large mixed-stage IT-capacity snapshot; Keppel’s India signal remains exploratory; Sembcorp’s India gigawatts are renewables; Mapletree’s 400MW figure remains a reported, unconfirmed proposal; and GIC’s clearest confirmed 1GW data-centre number is APAC-wide at Vantage, not India.

The sharpest finding is a limit: no like-for-like, project-level ledger in the public evidence reviewed attributes 1GW of India data-centre capacity to GIC and Temasek. The open questions are specific enough to report—and the answer can change if the companies or regulator publish the missing entity, stage and capacity bridges. nding is a limit: no like-for-like, project-level ledger in the public evidence reviewed attributes 1GW of India data-centre capacity to GIC and Temasek. The open questions are specific enough to report—and the answer can change if the companies or regulator publish the missing entity, stage and capacity bridges.