Promise Ledger
Launch and spacecraft company (Electron, Neutron). These are the dated public commitments by Rocket Lab and its people that we could source to a primary, with what happened.
3 entries: 2 met; 1 revised.
Plain counts, not a grade or a ranking. A short record is not a complete one. Updated Sep 28, 2026; each entry shows the date it was last checked against its source; scoring rules on the methodology page.
This first release is a selection, and a short record is not a complete record. Each programme milestone enters the ledger at its earliest dated public commitment we can find in a primary source, for governments and companies alike. Later dated commitments for the same milestone are shown on that one entry as a revision chain, oldest first, rather than as separate entries.
Revised · worded as a target
First flight · Rocket Lab
“accelerating the timeline to first launch, expected in 2024”
Said . Source: Rocket Lab (Exhibit 99.2 to Vector Acquisition Corp SEC Form 8-K): Rocket Lab Unveils Plans for New 8-Ton Class Reusable Rocket for Mega-Constellation Deployment (Mar 1, 2021, paragraph on the Mid-Atlantic Regional Spaceport launch pad)
Context: Rocket Lab's release unveiling the Neutron rocket, on using the existing pad at the Mid-Atlantic Regional Spaceport.
Later dated commitments for the same milestone
The counts use the original commitment. The latest date in the chain stands as: pending.
Outcome: On 2026-08-10 Rocket Lab said Stage 1 tank production is aligned with the target delivery of Neutron to the launch pad in Q4 2026.
Outcome source: Rocket Lab (SEC Form 8-K, Exhibit 99.1): Rocket Lab second quarter 2026 financial results release (Aug 10, 2026)
Checked against the source on Sep 26, 2026. Report a correction or send a response to this entry ·
Met · worded as a target
Other milestone · Rocket Lab
“Confirmed Rocket Lab’s Launch Complex 3 - the launch, test, and landing site for its reusable Neutron rocket – is on track to be completed and officially opened in Q3, 2025”
Said . Source: Rocket Lab (SEC Form 8-K, Exhibit 99.1): Rocket Lab second quarter 2025 financial results release (Aug 7, 2025)
Context: Second quarter 2025 results release.
Outcome: Rocket Lab announced the opening of Launch Complex 3 on 2025-08-28, stating the site was operational and officially opened in August 2025. (, on or before the deadline)
Outcome source: Rocket Lab: Rocket Lab Opens Launch Complex 3, A Critical Milestone On The Path To Neutron's First Launch (Aug 28, 2025)
Checked against the source on Sep 26, 2026. Report a correction or send a response to this entry ·
Met · worded as a target
Launch cadence · Rocket Lab
“with a booked manifest which supports more than 20 Electron and HASTE launches for 2025”
Said . Source: Rocket Lab (SEC Form 8-K, Exhibit 99.1): Rocket Lab fourth quarter and full year 2024 financial results release (Feb 27, 2025, Launch highlights)
Context: Launch highlights in Rocket Lab's Q4 2024 results release.
Outcome: Rocket Lab reported 21 Electron missions flown in 2025, three of them HASTE, with seven in Q4 2025. The date of the 21st launch was not captured, so the year end is used. (, on or before the deadline)
Outcome source: Rocket Lab (SEC Form 8-K, Exhibit 99.1): Rocket Lab fourth quarter and full year 2025 financial results release (Feb 26, 2026)
Checked against the source on Sep 26, 2026. Report a correction or send a response to this entry ·
Open data: download the whole ledger (CSV, CC BY 4.0). Archived on Zenodo, DOI 10.5281/zenodo.22985970. How entries are scored: methodology. No sponsor, advertiser or partner can add, remove, reorder, annotate or preview an entry, and these pages carry no advertising.
Cite as: SpaceNexus. (2026). SpaceNexus Promise Ledger (Version 2026-09-28) [Data set]. https://doi.org/10.5281/zenodo.22985970. Licensed CC BY 4.0.
The whole Promise Ledger, with every organisation and person, and the topic trackers.
Week in Space Data, every Friday.