Who holds ticker verified against the SEC company list on 2026-09-10 — a reviewed name-and-class mapping row, never an inferred symbol. how tickers are mapped ↗

SIRIUSXM HOLDINGS INC · common stock (filed as COMMON STOCK) · Q1 2026 · 9 members disclosed SIRI ↗
13F filers reporting this class for the quarter ended 2026-03-31
372
sum of the reported values across every holder; undisclosed values are left out, never counted as zero
$5.2B
holders whose share count rose or who opened the position (new + add), by shares
210
holders absent this quarter after holding last quarter — inferred from absence, not a sale record
52
FILING WINDOW OPEN
Q3 2026 filings are due by 2026-11-16 — figures for that quarter will change; missing filers are not zeros.

Holders — quarter ended 2026-03-31

by reported value · Δ shares vs 2025-12-31Holders rank by reported value. The change kind — new, add, trim or exit — is read from the share count against the prior quarter, never from the reported value.
13F holders of SIRI ranked by reported value, 1–25 of 431 holders
#FilerReported valueSharesΔ sharesChange
1BERKSHIRE HATHAWAY INC$2.9B124,807,117+124,807,117NEW
2BlackRock, Inc.$222M9,625,184−425,719TRIM
3VANGUARD PORTFOLIO MANAGEMENT LLC$201M8,704,748—NO PRIOR
4VANGUARD CAPITAL MANAGEMENT LLC$192M8,303,630—NO PRIOR
5DIMENSIONAL FUND ADVISORS LP$145M6,301,181+4,560,821ADD
6Kontiki Capital Management (HK) Ltd.$131M5,696,724−271,300TRIM
7CANADA PENSION PLAN INVESTMENT BOARD$89.1M3,860,924+1,985,644ADD
8STATE STREET CORP$81.9M3,547,616+60,201ADD
9CITADEL ADVISORS LLC$75.3M3,261,642+2,471,334ADD
10AQR CAPITAL MANAGEMENT LLC$68.3M2,988,907+1,538,960ADD
11Gates Capital Management, Inc.$63.3M2,742,359+2,742,359NEW
12MORGAN STANLEY$49.8M2,156,763+445,076ADD
13SEIZERT CAPITAL PARTNERS, LLC$42.5M1,840,822−59,330TRIM
14HSBC HOLDINGS PLC$41.6M1,795,954−2,357,124TRIM
15TWO SIGMA INVESTMENTS, LP$41.0M1,777,219−741,568TRIM
16CHARLES SCHWAB INVESTMENT MANAGEMENT INC$40.2M1,740,191+112,961ADD
17PRIVATE MANAGEMENT GROUP INC$31.2M1,352,602+6,419ADD
18WEITZ INVESTMENT MANAGEMENT, INC.$29.8M1,293,000−91,000TRIM
19Gotham Asset Management, LLC$28.6M1,238,571+395,206ADD
20Tidal Investments LLC$27.9M1,208,449−25,008TRIM
21UBS Group AG$27.3M1,180,876−343,919TRIM
22HBK INVESTMENTS L P$26.9M1,164,203−520,801TRIM
23VANGUARD FIDUCIARY TRUST CO$26.8M1,161,228—NO PRIOR
24WITTENBERG INVESTMENT MANAGEMENT, INC.$25.6M1,107,416+15,085ADD
25NORTHERN TRUST CORP$25.3M1,096,087+46,395ADD
Show all 431 holders
Newest filing in this build: 2026-07-31. Per-row filing dates are on each receipt.

Congress ↔ notable managers · SIRI

Congress · last 90 days

Buyers
0 — —
Sellers
0 — —

filed 2026-07-31 → 2026-10-29 · statutory ranges

Use of congressional disclosure reports for commercial purposes, credit decisions or solicitation is restricted by 5 U.S.C. §13107(c).

Notable managers · quarter ended 2026-03-31

Trimming
0 — $0 held

by shares · $ = value heldNEW + ADD vs TRIM + EXIT, by share count. $ = reported value now, not the change. · SIRIUSXM HOLDINGS INC

Merged timeline of congressional filings and notable-manager moves on SIRI
DateWhoChangeSize
2026-05-15Berkshire Hathaway 13FNEW+124,807,117 sh
2026-05-15Gotham Asset Management 13FADD+395,206 sh
2026-05-15Bridgewater Associates 13FADD+3,033 sh

3 newest, by filing date · 13F rows are quarter-end snapshots, not trades

A 13F is a quarterly, long-only snapshot filed up to 45 days late — not current holdings. what a 13F covers ↗

13F reports cover LONG positions in Section 13(f) securities (US exchange-traded equities plus reportable options, warrants, certain convertibles) held by managers with at least $100M in such securities — so managers below that threshold are absent entirely. No short positions, no cash, no non-13(f) assets — not a full portfolio, and not a census of institutional ownership.

Positions are quarter-end snapshots filed up to 45 days late — not current holdings: a position may have changed or closed since the quarter ended.

Values are the manager's stated market value at quarter-end in era-dependent units (whole dollars for form versions effective 2023-01-03 onward, thousands before), normalized here to whole dollars; each record notes its original unit.

Affiliated managers may report the same position, so one position can appear under more than one filer.

Positions under confidential treatment may be omitted until a later amendment discloses them.

These are disclosures, not investment advice.