Week in Space Data, every Friday.

Monthly release · December 2025

SpaceNexus Space Insider Activity

What company insiders and 5% holders filed with the SEC on the listed space names this month, and how much each issuer filed.

Data as of 2025-12-31 · computed 2026-11-03 · live view

← November 2025 January 2026 →All editions

Live view

Live view, not yet a published edition: this period's edition is scheduled for 2026-01-13. Until then these figures are recomputed from current data on every visit and should not be cited as the edition.

Back-computed edition

This period closed before the release began publishing on a calendar. The figures are computed from the same tables, but this is a back-calculation rather than what we would have published at the time. Scheduled editions begin with 2026-09.

Open-market insider purchases: 9
Open-market insider sales: 181
Disclosed purchase value: $505K
5% holder filings: 19
Filings indexed: 277
Lines excluded from the two figures above: 229

Open-market insider purchases, December 2025

Every transaction an officer, director or 10% owner reported under code P (a purchase they chose to make in the market), largest disclosed value first.

Methodology

Every figure is a count, a sum or a difference over the InsiderTransaction, InstitutionalPosition and IssuerFiling tables, each row of which was parsed from an SEC filing document and stores that filing’s accession number and URL. No estimate, model, projection or score is used anywhere in this release.
A transaction is attributed to the month its transaction date falls in, in UTC: the date the trade happened, not the date it was reported. A line carrying no transaction date falls back to the filing date, and nothing else is inferred.
THE HEADLINE PURCHASE AND SALE FIGURES COUNT ONLY CODES P AND S: an open-market or private purchase, and an open-market or private sale. A restricted-stock grant (code A) is not a purchase and shares withheld to pay tax on it (code F) are not a sale; both are automatic events on a compensation calendar. Every other class is published in its own table with its line count, share total and disclosed value, so the exclusion can be checked rather than trusted.
Value is shares multiplied by the price the filer disclosed. A line with no price contributes nothing and is counted as undisclosed: never as a value of zero, which would drag every total down silently.

What this edition can and cannot see

Coverage limits travel with the numbers, here and in every export of them.

This edition sees 419 Form 4 and Form 5 transaction lines, 19 Schedule 13D/G holder rows and 277 indexed filings for the month, across 47 issuers we hold an EDGAR filing index for.
Of those transaction lines, 190 are open-market trades (codes P and S) and 229 are not. Only the open-market lines are counted in the purchase and sale figures. The transaction-class table publishes the rest in full so the exclusion is visible rather than asserted.
Coverage is the tracked companies that carry a ticker and resolve to an SEC filer. Foreign-listed and privately held space companies file none of these forms, so their absence from every table here says nothing about them.
A company that has since delisted keeps its filing history but drops out of the exchange ticker map, so it is covered only where we already hold its CIK. Its history stops at its last filing, which is a fact about the company rather than a gap in this release.
Schedule 13D and 13G became structured XML submissions on 2024-12-18. Earlier filings are free-text cover pages: we index them but do not parse share counts out of them, and no figure on this page is drawn from one.

Sources and licences

The same credits are written into every CSV and JSON export of this data, so a downloaded file still names its sources.

UK Companies House: Company registration data from the UK Companies House register. Contains public sector information licensed under the Open Government Licence v3.0. Open Government Licence v3.0

Cite this edition

Cite or embed this data

Citation

SpaceNexus Space Insider Activity, December 2025. SpaceNexus, data as of 2025-12-31. https://spacenexus.us/releases/space-insider-activity/2025-12. https://spacenexus.us/releases/space-insider-activity/2025-12 (retrieved 2026-11-03).

Free to cite and embed with attribution. Data updates continuously; the citation date pins your retrieval.

By SpaceNexus Data

Computed from SpaceNexus data - no model is involved in producing a release

Every figure here is arithmetic over our own rows (counts, sums, deltas and rankings), and the page and its export are built by the same code, so they cannot disagree. How this edition is computed

Code P only. A grant, an option exercise and a dividend reinvestment are all acquisitions, and none of them is a purchase; they appear in the transaction-class table instead. A blank value means the filer disclosed no price, not a price of zero.

Open-market insider sales, December 2025

Every transaction reported under code S (a sale in the market), largest disclosed value first.

Open-market insider sales, December 2025. Every transaction reported under code S (a sale in the market), largest disclosed value first. Showing the first 10 of 181 rows.
Date	Company	Insider	Role	Shares	Price	Value
2025-12-09	AST SpaceMobile	AMERICAN TOWER CORP /MA/	Other	2,288,621	69.75	$159.6M
2025-12-15	Rocket Lab	Beck Peter	Director, Officer (CEO)	537,294	56.616	$30.4M
2025-12-15	Rocket Lab	Beck Peter	Director, Officer (CEO)	373,108	57.626	$21.5M
2025-12-22	Intuitive Machines	Altemus Stephen J	Director, Officer, 10% owner (Chief Executive Officer)	1,200,567	15.999	$19.2M
2025-12-16	Rocket Lab	Beck Peter	Director, Officer (CEO)	335,510	55.141	$18.5M
2025-12-15	Rocket Lab	Beck Peter	Director, Officer (CEO)	317,989	55.641	$17.7M
2025-12-22	Kratos Defense & Security Solutions	DEMARCO ERIC M	Director, Officer (President & CEO)	169,441	80.42	$13.6M
2025-12-16	Rocket Lab	Beck Peter	Director, Officer (CEO)	222,349	54.305	$12.1M
2025-12-16	Rocket Lab	Beck Peter	Director, Officer (CEO)	191,542	56.004	$10.7M
2025-12-16	Rocket Lab	Beck Peter	Director, Officer (CEO)	190,345	53.208	$10.1M

Code S only. Shares withheld by the issuer to cover taxes (code F) and dispositions back to the issuer (code D) are excluded: they are not sales into the market. Many code-S lines are executed under a pre-arranged Rule 10b5-1 plan adopted months earlier; the Form 4 checkbox for that is not parsed here, so this table does not distinguish them.

Showing the first 10 of 181 rows. 171 more in this table, plus every column the display leaves out.

The complete row set and its CSV and JSON exports are part of a SpaceNexus Research seat. The figures above are computed from exactly the same rows, so the summary and the export can never disagree. What a Research seat covers.

Insider activity by company

Open-market purchases and sales per company, with the compensation flow shown separately so it is visible and never mixed in.

Insider activity by company. Open-market purchases and sales per company, with the compensation flow shown separately so it is visible and never mixed in. Showing the first 10 of 29 rows.
Company	Ticker	Purchases	Sales	Net shares	Net value	Granted shares
Rocket Lab	RKLB	0	40	-2,579,814	$-146.2M	0
Kratos Defense & Security Solutions	KTOS	0	36	-782,517	$-58.8M	0
Satellogic	SATL	1	25	0	$90	0
EchoStar	ECHO	0	25	-287,586	$-30.3M	0
Globalstar	GSAT	0	10	-15,011	$-909K	17,957
Intuitive Machines	LUNR	0	9	-2,350,000	$-36.8M	0
Viasat	VSAT	0	8	-271,480	$-9.6M	63,000
AST SpaceMobile	ASTS	3	4	-2,342,606	$-163.6M	625,000
Palantir Technologies	PLTR	0	6	-29,000	$-5.0M	0
SAIC	SAIC	5	0	3,350	$337K	20,902

Net shares and net value are purchases minus sales, over codes P and S only. Granted shares and shares withheld for tax are reported beside them and are NOT part of either net figure. A net number is an arithmetic difference between two disclosures; it is not a rating of the company.

Showing the first 10 of 29 rows. 19 more in this table, plus every column the display leaves out.

Every transaction class in the month

The full denominator: every Form 4 line we parsed, grouped by what the transaction code says happened, and marked according to whether the headline figures count it.

Every transaction class in the month. The full denominator: every Form 4 line we parsed, grouped by what the transaction code says happened, and marked according to whether the headline figures count it. 8 rows.
Class	Codes	Lines	Shares	Disclosed value	In headline
Open-market purchase	P	9	15,365	$505K	yes
Open-market sale	S	181	9,020,046	$469.0M	yes
Grant or award	A	58	856,179.828	$263K	no
Shares withheld for tax or exercise price	F	50	439,157.802	$8.4M	no
Derivative exercise or conversion	M	86	6,358,297	$10.1M	no
Disposition to the issuer	D	5	2,247,190.907	$925K	no
Gift	G	23	40,213,148	–	no
Other, as coded on the filing	J	7	45,518,364	–	no

Codes and their meanings come from the SEC Form 4 general instructions. A code outside those instructions is stored as filed and classed "other" rather than guessed at.

Schedule 13D and 13G filings, December 2025

Holders of 5% or more of a tracked company, as they reported themselves, with the change against that same holder’s previous filing on the same issuer where we hold one.

Schedule 13D and 13G filings, December 2025. Holders of 5% or more of a tracked company, as they reported themselves, with the change against that same holder’s previous filing on the same issuer where we hold one. Showing the first 10 of 19 rows.
Filed	Company	Holder	Form	% of class	Change (pts)	Shares
2025-12-29	EchoStar	Charles W. Ergen	SCHEDULE 13D/A	51.3	0.8	148,679,486
2025-12-29	EchoStar	Cantey M. Ergen	SCHEDULE 13D/A	51	0.7	147,192,270
2025-12-29	EchoStar	Telluray Holdings, LLC	SCHEDULE 13D/A	27.9	8.3	59,942,448
2025-12-08	Intuitive Machines	Kamal Seyed Ghaffarian	SCHEDULE 13D/A	25.6	-0.4	39,711,374
2025-12-08	Intuitive Machines	Ghaffarian Enterprises, LLC	SCHEDULE 13D/A	24.3	-0.4	37,098,059
2025-12-29	EchoStar	Ergen Two-Year May 2025 SATS GRAT	SCHEDULE 13D/A	13.7	-0.1	25,000,000
2025-12-29	EchoStar	Ergen Two-Year July 2024 SATS GRAT	SCHEDULE 13D/A	10.6	0	18,561,842
2025-12-29	EchoStar	Ergen Two-Year June 2025 SATS GRAT	SCHEDULE 13D/A	9.7	0	16,800,000
2025-12-31	Sidus Space	CVI Investments, Inc.	SCHEDULE 13G	7.4	–	4,000,000
2025-12-31	Sidus Space	Heights Capital Management, Inc.	SCHEDULE 13G	7.4	–	4,000,000

Percent of class is the figure the filer stated; we do not recompute it against a share count of our own. A blank change means we hold no earlier filing by that holder on that issuer, which is not the same as a new position. Schedule 13D is the long form filed by holders who do not certify passive intent and 13G is the short form for passive holders and qualified institutions: that describes the FORM, not what the holder will do. Structured filings only, from 2024-12-18.

Showing the first 10 of 19 rows. 9 more in this table, plus every column the display leaves out.

Filing cadence by issuer

How much each covered issuer filed this month, against its own trailing monthly average, with late-filing notifications and periodic-report lag.

Filing cadence by issuer. How much each covered issuer filed this month, against its own trailing monthly average, with late-filing notifications and periodic-report lag. Showing the first 10 of 38 rows.
Company	Filings	8-K	Trailing 8-K/mo	Above average	First seen
Kratos Defense & Security Solutions	24	0	0.64	-0.64	–
Rocket Lab	19	1	1.09	-0.09	–
Globalstar	17	0	0.78	-0.78	–
AST SpaceMobile	16	0	3	-3	–
Iridium Communications	15	1	0.73	0.27	–
BlackSky	14	1	0.64	0.36	424B5; CORRESP; EFFECT
General Dynamics	12	2	0.73	1.27	–
EchoStar	11	1	1.09	-0.09	–
Momentus	10	4	2.36	1.64	–
Boeing	10	2	1	1	S-8 POS

The trailing average is computed over the months we actually hold filings for that company, printed beside it as months of prior history: dividing a short history by twelve would manufacture a burst that is really coverage. "First seen" means the first filing of that form type in OUR records, which for a company we began indexing recently is a statement about us. A late-filing notice is Form NT 10-K or NT 10-Q, which the issuer files itself.

Showing the first 10 of 38 rows. 28 more in this table, plus every column the display leaves out.

Filings behind these tables

Every filing indexed in the month, with the form, the period it covers, any 8-K item codes, and its accession number.

Filings behind these tables. Every filing indexed in the month, with the form, the period it covers, any 8-K item codes, and its accession number. Showing the first 10 of 277 rows.
Filed	Company	Form	Period covered	8-K items	Accession
2025-12-01	Kratos Defense & Security Solutions	144	–	–	0001114923-25-000004
2025-12-01	Globalstar	144	–	–	0001571391-25-000018
2025-12-01	Globalstar	4	2025-11-28	–	0001571391-25-000019
2025-12-01	Kratos Defense & Security Solutions	144	–	–	0001620329-25-000004
2025-12-01	CACI International	8-K	2025-11-25	1.01,2.03,9.01	0001628280-25-054481
2025-12-01	Kratos Defense & Security Solutions	144	–	–	0001950047-25-009536
2025-12-01	Kratos Defense & Security Solutions	144	–	–	0001950047-25-009540
2025-12-01	Kratos Defense & Security Solutions	144	–	–	0001950047-25-009555
2025-12-02	EchoStar	4	2025-11-28	–	0000904548-25-000005
2025-12-02	Gilat Satellite Networks	6-K	2025-12-02	–	0001178913-25-003979

Item codes are reproduced exactly as EDGAR records them and are not translated into descriptions here. Every row links to the filing on sec.gov.

Showing the first 10 of 277 rows. 267 more in this table, plus every column the display leaves out.

A joint Form 4 reports one set of shares held by several related reporting persons. The line is attributed to the first person named and the others are listed beside it; attributing it to each would multiply the block by the number of filers.

Form 3, an insider’s initial statement of holdings, is not imported. It reports a standing position rather than a transaction, and counting it as one would invent a trade on the day every director joined a board.

Schedule 13D and 13G figures come only from structured XML submissions, which the SEC mandated from 2024-12-18. Earlier filings are free-text cover pages: they are indexed and never scraped for share counts. Percent of class is the figure the filer stated and is not recomputed by us.

Filing-cadence comparisons use each company’s own trailing monthly average over the months we actually hold filings for, and the number of those months is printed beside the average. A company we began indexing recently would otherwise show a burst that is really coverage.

Coverage is the tracked companies carrying a ticker that resolves to an SEC filer through EDGAR’s official ticker-to-CIK map. Foreign-listed and privately held space companies file none of these forms, so their absence says nothing about them.

This release reports what was filed. It contains no recommendation, rating, target or forecast, it does not consider any reader’s circumstances, and it is not investment advice.

Our parsed SEC history begins 2025-01-01. That is a backfill boundary, not a claim about what happened before it.

Form 4s are filed within two business days of a transaction and Form 5s can report a transaction months later, so a month’s figures can grow after the month ends. Each edition states the date it was computed, and a recomputation that moves is a correction rather than a revision of history.

Amendments are counted as filed. A 4/A restating an earlier line appears as its own row rather than silently overwriting the original, because both were filed and both are part of the record.

Form 3 (an insider’s initial statement of holdings) is not imported at all. It reports a standing position rather than a transaction, and counting it as one would invent a trade on the day every director joined a board.

The Form 4 Rule 10b5-1 checkbox is not parsed, so this release cannot tell you whether a sale was executed under a pre-arranged plan adopted months earlier. That distinction matters and we do not have it.

Nothing here is adjusted for share splits, and share counts are as reported on each filing.

Every figure on this page is a count, a sum or a difference over our own rows. Nothing is model-generated, estimated, projected or scored, and no figure is a recommendation.

2025-12-16	SAIC	Natarajan Prabu	Officer (EVP, Chief Financial Officer)	2,000	100.488	$201K
2025-12-16	SAIC	REAGAN JAMES	Director, Officer (Interim CEO)	1,000	100.165	$100K
2025-12-17	AST SpaceMobile	LARSON KEITH R	Director	715	70.02	$50K
2025-12-24	AST SpaceMobile	LARSON KEITH R	Director	625	80	$50K
2025-12-10	AST SpaceMobile	LARSON KEITH R	Director	675	72.71	$49K
2025-12-09	Satellogic	CANTOR FITZGERALD, L. P.	10% owner	10,000	1.88	$19K
2025-12-23	SAIC	DiFronzo Vincent P.	Officer (EVP,-Air Force & Comb Commands)	150	102.89	$15K
2025-12-31	SAIC	Attili Srinivas	Officer (EVP, Civilian)	100	101.26	$10K
2025-12-16	SAIC	Hageman Hilary	Officer (EVP General Counsel, Secretary)	100	100.21	$10K

Newsletter