Mazagon Dock Shipbuilders Limited (MDL)

MDL is India's premier defence shipyard, building destroyers, frigates, submarines and offshore patrol vessels for the Indian Navy. Major programmes include: Project 75 (6 Scorpène-class submarines wi

defenceindia-oemOperationalTier A
Country: IN

Last verified:

At a Glance

Headquarters
Mumbai, Maharashtra, India (Mazagon Dock)
Type
Company (listed)
Founded
1934 (as a private limited company; nationalised 1960); Schedule 'A' CPSE under MoD; Miniratna Category-I
India entity
null
Listed
NSE: MAZDOCK | BSE: 543237 (IPO Oct 12, 2020; issue size ₹443.69 Cr)
Key India role
MDL is India's premier defence shipyard, building destroyers, frigates, submarines and offshore patrol vessels for the Indian Navy. Major programmes include: Project 75 (6 Scorpène-class submarines wi
indicators
[]
key specs
[]

What It Is

MDL is India's premier defence shipyard, building destroyers, frigates, submarines and offshore patrol vessels for the Indian Navy. Major programmes include: Project 75 (6 Scorpène-class submarines with Naval Group France — INS Kalvari through INS Vaghsheer, last delivered Dec 2024); Project 15B (4 Visakhapatnam-class stealth guided-missile destroyers — INS Visakhapatnam commissioned Nov 2021, INS Mormugao Dec 2022, INS Imphal Dec 2023, INS Surat Jan 2025); and Project 17A (3 of 7 Nilgiri-class stealth frigates built at MDL — INS Nilgiri delivered Dec 2024, INS Himgiri delivered Aug 2025). MDL has built 801 vessels since 1960. The Navy is considering procuring three additional Kalvari-class / P-75I-upgraded submarines (Jun 2026).

Sources: [1][2][3][4][5]

Deployments & Procurement

3 documented India deployment(s)/procurement(s).

AgencyContextYearQuantity / NoteSources
Indian NavyProject 75 — 6 Scorpène-class submarines delivered2017-20246 submarines[1][2][3]
Indian NavyProject 15B — 4 Visakhapatnam-class destroyers commissioned2021-20254 destroyers (INS Visakhapatnam, Mormugao, Imphal, Surat)[1][2][3]
Indian NavyProject 17A — 3 Nilgiri-class frigates delivered by MDL2024-20253 (Nilgiri, Himgiri + 1 launched)[1][2][3]

Import Dependencies

Not analysed in this dossier.

Intelligence Assessment

Methodology: /research/methodology/

India footprint
Documented/5

10 sources with India-specific evidence.

Sources: [1][2][3][4]

Indigenous content
Not disclosed/5

Indigenous percentage not publicly verified.

Sources: [1][2][3]

Operational status
Operational/5

Based on latest public sources as of 2026-08-30.

Sources: [1][2][3]

Source quality
High/5

3 official, 6 credible sources.

Sources: [1][2][3]

FAQ

When did MDL list on the stock exchanges (IPO date)?

See the dossier sources above for details.

Sources: [1][2][3]

How many Scorpène-class submarines has MDL built under Project 75?

Major programmes include: Project 75 (6 Scorpène-class submarines with Naval Group France — INS Kalvari through INS Vaghsheer, last delivered Dec 2024); Project 15B (4 Visakhapatnam-class stealth guided-missile destroyers — INS Visakhapatnam commissioned Nov 2021, INS Mormugao Dec 2022, INS Imphal Dec 2023, INS Surat Jan 2025); and Project 17A (3 of 7 Nilgiri-class stealth frigates built at MDL — INS Nilgiri delivered Dec 2024, INS Himgiri delivered Aug 2025).

Sources: [1][2][3]

When was INS Surat, the last Visakhapatnam-class destroyer, commissioned?

Major programmes include: Project 75 (6 Scorpène-class submarines with Naval Group France — INS Kalvari through INS Vaghsheer, last delivered Dec 2024); Project 15B (4 Visakhapatnam-class stealth guided-missile destroyers — INS Visakhapatnam commissioned Nov 2021, INS Mormugao Dec 2022, INS Imphal Dec 2023, INS Surat Jan 2025); and Project 17A (3 of 7 Nilgiri-class stealth frigates built at MDL — INS Nilgiri delivered Dec 2024, INS Himgiri delivered Aug 2025).

Sources: [1][2][3]

Which shipyard built the Kalvari-class submarines?

Major programmes include: Project 75 (6 Scorpène-class submarines with Naval Group France — INS Kalvari through INS Vaghsheer, last delivered Dec 2024); Project 15B (4 Visakhapatnam-class stealth guided-missile destroyers — INS Visakhapatnam commissioned Nov 2021, INS Mormugao Dec 2022, INS Imphal Dec 2023, INS Surat Jan 2025); and Project 17A (3 of 7 Nilgiri-class stealth frigates built at MDL — INS Nilgiri delivered Dec 2024, INS Himgiri delivered Aug 2025).

Sources: [1][2][3]

How many Nilgiri-class frigates is MDL building under Project 17A?

Major programmes include: Project 75 (6 Scorpène-class submarines with Naval Group France — INS Kalvari through INS Vaghsheer, last delivered Dec 2024); Project 15B (4 Visakhapatnam-class stealth guided-missile destroyers — INS Visakhapatnam commissioned Nov 2021, INS Mormugao Dec 2022, INS Imphal Dec 2023, INS Surat Jan 2025); and Project 17A (3 of 7 Nilgiri-class stealth frigates built at MDL — INS Nilgiri delivered Dec 2024, INS Himgiri delivered Aug 2025).

Sources: [1][2][3]

Open Questions

  • Import-dependency table not published on the listing; component-level analysis pending.
  • Re-verify “status” against primary Indian sources (MoD/PIB/DRDO/OEM) next cycle.

Sources

  1. src-01Indicative
    https://mazagondock.in
    MDL Official·accessed 2026-08-30

    Domain root only; demoted to indicative per Atlas source-quality rule.

  2. src-02Credible
    https://www.screener.in/company/MAZDOCK/consolidated
    Screener.in·accessed 2026-08-30
  3. src-03Credible
    https://en.wikipedia.org/wiki/Mazagon_Dock_Shipbuilders_Limited
    Wikipedia·accessed 2026-08-30
  4. src-04Credible
    https://en.wikipedia.org/wiki/Project-75_(India)_submarine_acquisition_project
    Wikipedia·accessed 2026-08-30
  5. src-05Credible
    https://en.wikipedia.org/wiki/Kalvari-class_submarine_(2015)
    Wikipedia·accessed 2026-08-30
  6. src-06Credible
    https://en.wikipedia.org/wiki/Visakhapatnam-class_destroyer
    Wikipedia·accessed 2026-08-30
  7. src-07Official
    https://www.pib.gov.in/Pressreleaseshare.aspx?PRID=1893036
    PIB India·accessed 2026-08-30
  8. src-08Official
    https://www.pib.gov.in/PressReleasePage.aspx?PRID=1969358
    PIB India·Oct 20, 2023·accessed 2026-08-30
  9. src-09Official
    https://www.pib.gov.in/PressReleasePage.aspx?PRID=2086668&reg=48&lang=2
    PIB India·Dec 20, 2024·accessed 2026-08-30
  10. src-09Official
    https://www.pib.gov.in/PressReleasePage.aspx?PRID=2086668&reg=48&lang=2
    PIB India·accessed
  11. src-10Credible
    https://idsa.in/publisher/issuebrief/the-p-75i-saga-and-indias-submarine-building-journey
    IDSA·Mar 12, 2025·accessed 2026-08-30
  12. src-atlas-listingIndicative
    Mazagon Dock Shipbuilders Limited (MDL) — Defence Atlas listing
    Techadyant Labs — Atlas register (own register)·accessed 2026-09-27

    Own register: indicative only, never official per standing evidence rules. All listing-derived figures in this dossier are attributed to this source.

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