Why space funding totals differ

Some trackers count companies that use space-based data, navigation or connectivity; others count only companies that build or operate space systems. Whether a defense or aerospace company that also does space work counts is a choice each tracker makes.

• Space Capital: Counts investment across the whole space economy in three layers (infrastructure, distribution and applications); its examples of the applications layer include GPS rideshare and agricultural analytics. Source
• Seraphim Space: Counts a SpaceTech universe that also takes in platforms such as high-altitude aircraft and data analytics. Source
• BryceTech: Counts companies serving the upstream and midstream space value chain (hardware, launch, satellite operations) and also direct users of satellite imagery data, if they began as angel- or venture-backed start-ups (report PDF, pages 9 and 31). Source
• PitchBook: Counts venture deals by PitchBook's own Space Tech taxonomy. Source

SpaceNexus: We count a round only when the company's own recorded sector is space work (launch, satellites, ground segment, Earth observation, in-space infrastructure, space manufacturing and the like). A defense or aerospace company counts only when its recorded subsector names space work. Rounds into companies we do not class as space are listed beside the total, never summed into it.

A founder putting money into their own company is counted by some trackers and excluded by others.

• Seraphim Space: States that it only includes third-party capital invested at arm's length, so personal investments (a founder's own money) are excluded. Source

SpaceNexus: We record the round's amount as the company or the reporting states it. When a founder takes part in a round, that money is inside the figure; we do not subtract it.

Loans, notes, bonds and credit facilities can be as large as equity rounds. Including them can add billions to a period.

• Novaspace: Counts private investment with debt financing included. Source
• BryceTech: Counts debt financing alongside seed, venture and private equity, M&A and IPOs (report PDF, page 9). Source

SpaceNexus: Priced equity rounds, convertible notes, SAFEs, bridges and extensions count as private rounds (they are or become equity). Debt (loans, bonds, notes that do not convert, credit facilities) is never in our total: debt financings we record are listed beside it with their own sum.

Grants and government contracts are money into space companies, but they are not investment: nobody buys a share. Some databases record grants; contract revenue is a different thing again.

• Novaspace: Its database also records government grants, alongside IPOs, SPAC mergers and stock sales. Source

SpaceNexus: Grants are listed beside our total, labelled, and never summed into it. When a round mixes private money with public funding and the source gives the split, only the private part is counted. Government contracts are never counted as funding; they are tracked separately as federal awards.

One IPO can be larger than every private round in a quarter combined. Offerings by listed space companies, and tender offers in which existing shares change hands, are counted by some trackers as space investment.

• BryceTech: Counts a start-up's IPO, but not the debt or equity it raises after listing (report PDF, page 31). Source
• Novaspace: Its database records IPOs, SPAC mergers and stock sales. Source
• PitchBook: Counts venture capital deals only. Source

SpaceNexus: Our total is private rounds only. IPOs, SPAC mergers, offerings by listed companies and tender offers or secondary sales are each listed beside the total with their own sum. A raise by a company that is already listed is treated as a public-market deal, not a private round.

A round can be reported as being raised in one quarter, close in the next, and show up in a filing later still. A tracker that dates by announcement and one that dates by close can put the same money in different quarters. A round raised in stages (a first close, then a final close) can be counted twice if both closes are added.

• Space Capital: Its methodology says a data point is added only once confirmed by multiple sources. Source
• BryceTech: Says every deal is corroborated with multiple sources (report PDF, page 9). Source

SpaceNexus: A press-reported round is dated on the day the closed round was announced or reported, not the day it was reported as being sought (a raise that is only sought is listed under Raising now and never counted). A round found in an SEC Form D carries the filing's date of first sale, or its filing date when no sale date is given. When a round closes in stages, each close adds only the new money.

Seraphim, PitchBook and Novaspace each say they count worldwide, and BryceTech reports by country. Coverage still differs in practice: a tracker that reads SEC filings and English-language press will see more US and European rounds than Chinese or Indian ones.

• Seraphim Space: Counts private capital worldwide. Source
• PitchBook: Counts venture deals worldwide. Source
• Novaspace: Counts private investment in space ventures worldwide. Source
• BryceTech: Breaks its annual total down by the recipient company’s country and region. Source

SpaceNexus: We count rounds worldwide, but our sources are SEC Form D filings, English-language space and business press, and company newsrooms, so US rounds are the best covered. Each edition prints its rounds by country so the tilt is visible.

Many rounds are announced without an amount. Some trackers estimate them; others count the round with no dollars. "More than $X" and "about $X" figures can be counted at face value or left out.

• Payload: States its first-half figure as a floor: "more than" the sum. Source

SpaceNexus: An undisclosed round counts as a round and adds nothing to the dollar total; we never estimate an amount. A round whose only figure is a floor ("more than") or an approximation ("about", "within rounding error") is marked as such and held out of the total until a source gives an exact figure.

Rounds are reported late. A figure published days after a period closes will miss some rounds that a figure published weeks later includes, and a live database keeps moving after any figure is quoted.

• Payload: Published its first-half figure six days after the half closed. Source
• BryceTech: Publishes once a year; its 2025 total appeared in June 2026. Source

SpaceNexus: Each edition is frozen four days after its quarter closes and never changes, except by a printed correction. Rounds reported after the freeze are counted on the edition page as revisions, so the gap between the frozen and the live figure is always visible.