Leaderboard › Companies with space divisions

Sirius XM Holdings Inc.

Sirius XM Holdings (SIRI) has a market cap of US$8.7B as of Oct 2, 2026 close, ranked #10 by whole market cap among companies with space divisions. How it is built

SIRI on Nasdaq · USA · Only part of this company is space; it is ranked separately and never enters pure-play or segment totals.

Market cap

US$8.7B

Priced on Nasdaq (SIRI) · as of Oct 2, 2026 close

Shares outstanding

337.1M

Shares as of Jul 28, 2026 · 10-Q filed Jul 30, 2026 (SEC EDGAR)

Coverage

Companies with space divisions

Ranked by whole market cap; only part of each company is space.

Next event

—

Nothing on the calendar yet

Price · Nasdaq (SIRI)

as of Oct 2, 2026End of day

US$25.725▲ +0.3%

Regular-session last sale across US venues on Oct 2, 2026, not the official closing auction price.

Oct 2, 2026 · US$25.725

Change: ▲ +13.6%
High: US$32.57 Jul 29, 2026
Low: US$19.925 Nov 20, 2025
Range: Oct 1, 2025 to Oct 2, 2026 · 253 sessions

Regular-session last sales, as traded. Prices are not adjusted for share splits.

What they do

as of Oct 3, 2026

Sirius XM operates satellite radio in the United States and Canada from its own fleet of satellites, and the Pandora and SiriusXM streaming services. It is headquartered in New York. Its shares trade on Nasdaq as SIRI. Only part of the company is space: the streaming businesses are not.

A plain description of the business, reviewed Oct 3, 2026. Drawn from: Form 10-K and 10-Q filings (CIK 0000908937). Corrections: see corrections.

Recent filings and events

as of Oct 1, 2026

Last results filing: Form 8-K, item 2.02: results of operations, filed Jul 30, 2026 · period Jul 30, 2026

Sep 3, 2026SCHEDULE 13G/APassive ownership report (amendment) · SEC EDGAR
Aug 6, 2026144Notice of proposed sale · SEC EDGAR
Jul 30, 2026S-8Employee plan registration · SEC EDGAR
Jul 30, 20268-KItems 5.02, 9.01 · SEC EDGAR
Jul 30, 202610-QQuarterly report · SEC EDGAR
Jul 30, 20268-KItems 2.02, 7.01, 9.01 · SEC EDGAR
Jul 30, 2026EarningsSirius XM Holdings reported results of operations (Form 8-K, item 2.02) · SEC EDGAR
Jun 10, 2026SCHEDULE 13D/AActive ownership report (amendment) · SEC EDGAR
Jun 1, 20268-KItems 5.02, 5.07, 9.01 · SEC EDGAR
May 29, 2026144Notice of proposed sale · SEC EDGAR

Sources: SEC EDGAR. All filings on EDGAR. Insider forms (Form 4) are in the table below. Dated events are on the calendar and the launch manifest.

Insider transactions (Form 4)

Last 10 insider transactions reported on Form 4
Date	Reporting person	Transaction	Shares	Price	Owned after	Filing
Sep 9, 2026	HARTENSTEIN EDDY WDirector	Gift	−8,193	US$0.00	6,835	Form 4 filed Sep 10, 2026
Sep 9, 2026	HARTENSTEIN EDDY WDirector	Gift · indirect (By Trust)	+8,193	US$0.00	37,117	Form 4 filed Sep 10, 2026
Aug 26, 2026	Zaslav DavidDirector	Grant or award	+60	US$0.00	35,465	Form 4 filed Aug 28, 2026
Aug 26, 2026	Witz Jennifer CDirector, CEO	Grant or award	+1,419	US$0.00	382,012	Form 4 filed Aug 28, 2026
Aug 26, 2026	Sud AnjaliDirector	Grant or award	+60	US$0.00	16,204	Form 4 filed Aug 28, 2026
Aug 26, 2026	Stephenson DaveDirector	Grant or award	+60	US$0.00	12,737	Form 4 filed Aug 28, 2026
Aug 26, 2026	Salen KristinaDirector	Grant or award	+60	US$0.00	22,992	Form 4 filed Aug 28, 2026
Aug 26, 2026	Rapino MichaelDirector	Grant or award	+60	US$0.00	41,136	Form 4 filed Aug 28, 2026
Aug 26, 2026	Procope JonelleDirector	Grant or award	+60	US$0.00	18,414	Form 4 filed Aug 28, 2026
Aug 26, 2026	Mothner EveEVP, Chief Legal Officer & Sec	Grant or award	+1,528	US$0.00	174,503	Form 4 filed Aug 28, 2026

What each Form 4 reported, as filed. Non-derivative transactions only; option grants and exercises appear on the filing itself. All filings on EDGAR.

Contract awards · last 12 months

No US federal contract award of US$250K or more on file for the last 12 months.

US federal awards of US$250K or more, from USAspending.gov. Amounts are as the source states them. Defense awards reach USAspending about 90 days after signing.

Upcoming events

Nothing on the manifest for Sirius XM Holdings yet.

Each row links to its source. The calendar lists every company's dates; the full launch manifest explains the status labels.

Peers

EchoStarECHOUS$27.4B#8 · as of Oct 2, 2026 close
MoogMOG.AUS$12.4B#9 · as of Oct 2, 2026 close
Kratos Defense & Security SolutionsKTOSUS$8.1B#11 · as of Oct 2, 2026 close
Mercury SystemsMRCYUS$5.1B#12 · as of Oct 2, 2026 close
Karman Space & DefenseKRMNUS$4.5B#13 · as of Oct 2, 2026 close

All companies with space divisions ranked by whole market cap · Space industry market cap · Leaderboard

Listings

Every listing of Sirius XM Holdings Inc.
Ticker	Exchange	Currency	Share class	Role
SIRI	Nasdaq	USD	Common	Pricing listing

Share classes

as of Jul 28, 2026

Shares outstanding by class
Class	Shares	As of	Counted	Source
Common	337,066,891	Jul 28, 2026	At its own listed price	SEC EDGAR

How this market cap is built

as of Oct 2, 2026End of day

Shares outstanding: 337,066,891 · every class, counted once · shares as of Jul 28, 2026 · from the 10-Q filed Jul 30, 2026
Price: US$25.725 · priced on Nasdaq (SIRI) · regular-session last sale on Oct 2, 2026
Market cap: US$8.7B = 337,066,891 shares × US$25.725
In Canadian dollars: C$12.4B · Bank of Canada rate for Oct 2, 2026: US$1 = C$1.4246
On the list: Number 10 of 17 companies with space divisions with a computed market cap. Only part of this company is space.

Market cap = shares outstanding × one price × one exchange rate (methodology). The price is a last sale across several US venues, not the official closing auction price.

How this number is built: methodology. Where the data comes from: sources. Who runs this site and what they hold: disclosures.