Who owns Sirius XM Holdings (SIRI)
Which tracked institutional funds hold SIRI, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See SIRI company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
186 tracked funds added or opened SIRI while 77 trimmed or exited it between 2026-Q1 and 2026-Q2 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
SIRI’s largest tracked holder by dollar value, BERKSHIRE HATHAWAY INC, sizes it at 1.2% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 1.2pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in SIRI divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 568 tracked filers holding SIRI, 298 increased or opened the position and 243 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in SIRI between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 40
- Boston Partners$150M
- J. Goldman & Co LP$86M
- DEPRINCE RACE & ZOLLO INC$33M
- PRINCIPAL FINANCIAL GROUP INC$13M
- Fund 1 Investments, LLC$10M
- PLUSTICK MANAGEMENT LLC$8M
Full exits 49
- LSV ASSET MANAGEMENT$74M
- THOMPSON SIEGEL & WALMSLEY LLC$59M
- HRT FINANCIAL LP$36M
- HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND$21M
- Penserra Capital Management LLC$19M
- S&CO INC$13M
Largest adds
- BERKSHIRE HATHAWAY INC$806M
- BlackRock, Inc.$298M
- DIMENSIONAL FUND ADVISORS LP$165M
- STATE STREET CORP$95M
- Gates Capital Management, Inc.$71M
- VANGUARD PORTFOLIO MANAGEMENT LLC$67M
Largest trims
- SEIZERT CAPITAL PARTNERS, LLC$42M
- AMERIPRISE FINANCIAL INC$34M
- HSBC HOLDINGS PLC$26M
- CANADA PENSION PLAN INVESTMENT BOARD$19M
- TWO SIGMA INVESTMENTS, LP$18M
- JANE STREET GROUP, LLC$14M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BERKSHIRE HATHAWAY INC | 124,807,117 | $3.7B | 47.4% | 2026-Q2 |
| BlackRock, Inc. added | 17,602,229 | $520M | 6.7% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 10,512,352 | $311M | 4.0% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 9,082,629 | $268M | 3.5% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 8,386,784 | $248M | 3.2% | 2026-Q2 |
| Kontiki Capital Management (HK) Ltd. added | 6,082,824 | $180M | 2.3% | 2026-Q2 |
| STATE STREET CORP added | 5,992,497 | $177M | 2.3% | 2026-Q2 |
| Boston Partners added | 5,080,806 | $150M | 1.9% | 2026-Q2 |
| Gates Capital Management, Inc. added | 4,539,927 | $134M | 1.7% | 2026-Q2 |
| STATE OF WISCONSIN INVESTMENT BOARD added | 4,000,000 | $5M | 0.1% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 3,901,488 | $115M | 1.5% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 3,396,308 | $98M | 1.3% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 3,310,550 | $98M | 1.3% | 2026-Q2 |
| Bank of New York Mellon Corp added | 3,012,240 | $89M | 1.1% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 3,007,137 | $89M | 1.1% | 2026-Q2 |
| CHECK CAPITAL MANAGEMENT INC/CA trimmed | 2,927,799 | $86M | 1.1% | 2026-Q2 |
| J. Goldman & Co LP added | 2,921,651 | $86M | 1.1% | 2026-Q2 |
| CANADA PENSION PLAN INVESTMENT BOARD trimmed | 2,364,933 | $70M | 0.9% | 2026-Q2 |
| NORGES BANK added | 2,091,917 | $62M | 0.8% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 1,760,633 | $52M | 0.7% | 2026-Q2 |
| Squarepoint Ops LLC added | 1,649,327 | $49M | 0.6% | 2026-Q2 |
| MORGAN STANLEY trimmed | 1,641,435 | $48M | 0.6% | 2026-Q2 |
| NORTHERN TRUST CORP added | 1,584,505 | $47M | 0.6% | 2026-Q2 |
| Tidal Investments LLC added | 1,524,823 | $45M | 0.6% | 2026-Q2 |
| Gotham Asset Management, LLC added | 1,383,251 | $41M | 0.5% | 2026-Q2 |
| PRIVATE MANAGEMENT GROUP INC trimmed | 1,234,502 | $36M | 0.5% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 1,188,199 | $35M | 0.5% | 2026-Q2 |
| WEITZ INVESTMENT MANAGEMENT, INC. trimmed | 1,188,000 | $35M | 0.5% | 2026-Q2 |
| DEPRINCE RACE & ZOLLO INC new | 1,120,872 | $33M | 0.4% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 1,037,874 | $31M | 0.4% | 2026-Q2 |
| WITTENBERG INVESTMENT MANAGEMENT, INC. trimmed | 934,864 | $28M | 0.4% | 2026-Q2 |
| UBS Group AG trimmed | 911,488 | $27M | 0.3% | 2026-Q2 |
| Allianz Asset Management GmbH added | 907,187 | $27M | 0.3% | 2026-Q2 |
| FIRST TRUST ADVISORS LP trimmed | 882,128 | $26M | 0.3% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC trimmed | 854,987 | $25M | 0.3% | 2026-Q2 |
| HBK INVESTMENTS L P trimmed | 848,845 | $25M | 0.3% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP trimmed | 791,961 | $23M | 0.3% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 738,539 | $22M | 0.3% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 730,327 | $22M | 0.3% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC trimmed | 728,508 | $22M | 0.3% | 2026-Q2 |
| Invesco Ltd. added | 723,901 | $21M | 0.3% | 2026-Q2 |
| Empyrean Capital Partners, LP | 692,775 | $20M | 0.3% | 2026-Q2 |
| Hi-Line Capital Management, LLC added | 677,658 | $20M | 0.3% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 660,839 | $20M | 0.3% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 652,397 | $19M | 0.2% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 642,939 | $19M | 0.2% | 2026-Q2 |
| PANAGORA ASSET MANAGEMENT INC trimmed | 641,689 | $19M | 0.2% | 2026-Q2 |
| BISLETT MANAGEMENT, LLC | 600,000 | $18M | 0.2% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 586,624 | $17M | 0.2% | 2026-Q2 |
| HSBC HOLDINGS PLC trimmed | 541,149 | $16M | 0.2% | 2026-Q2 |
| ExodusPoint Capital Management, LP added | 531,934 | $16M | 0.2% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 515,725 | $15M | 0.2% | 2026-Q2 |
| GABELLI FUNDS LLC added | 511,034 | $15M | 0.2% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC added | 427,966 | $13M | 0.2% | 2026-Q2 |
| CAPITAL MANAGEMENT CORP /VA trimmed | 426,391 | $13M | 0.2% | 2026-Q2 |
| swisspartners Advisors Ltd trimmed | 413,569 | $12M | 0.2% | 2026-Q2 |
| Chou Associates Management Inc. | 409,589 | $12M | 0.2% | 2026-Q2 |
| Advisors Asset Management, Inc. trimmed | 409,272 | $12M | 0.2% | 2026-Q2 |
| PDT Partners, LLC trimmed | 404,711 | $12M | 0.2% | 2026-Q2 |
| GAMCO INVESTORS, INC. ET AL trimmed | 399,304 | $12M | 0.2% | 2026-Q2 |
| Swiss National Bank added | 369,485 | $11M | 0.1% | 2026-Q2 |
| SEI INVESTMENTS CO added | 363,684 | $11M | 0.1% | 2026-Q2 |
| HUNTINGTON NATIONAL BANK trimmed | 352,041 | $10M | 0.1% | 2026-Q2 |
| Fund 1 Investments, LLC new | 349,173 | $10M | 0.1% | 2026-Q2 |
| FRANKLIN RESOURCES INC added | 339,272 | $10M | 0.1% | 2026-Q2 |
| Creative Planning added | 334,653 | $10M | 0.1% | 2026-Q2 |
| Cambria Investment Management, L.P. trimmed | 328,725 | $10M | 0.1% | 2026-Q2 |
| Legal & General Group Plc added | 324,043 | $10M | 0.1% | 2026-Q2 |
| BARCLAYS PLC trimmed | 306,451 | $9M | 0.1% | 2026-Q2 |
| Engineers Gate Manager LP added | 303,029 | $9M | 0.1% | 2026-Q2 |
| WINTON GROUP Ltd added | 298,563 | $9M | 0.1% | 2026-Q2 |
| Nuveen, LLC added | 293,705 | $9M | 0.1% | 2026-Q2 |
| TOWERVIEW LLC trimmed | 282,500 | $8M | 0.1% | 2026-Q2 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. trimmed | 273,288 | $8M | 0.1% | 2026-Q2 |
| PLUSTICK MANAGEMENT LLC new | 270,000 | $8M | 0.1% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 266,477 | $8M | 0.1% | 2026-Q2 |
| PEREGRINE CAPITAL MANAGEMENT LLC new | 264,181 | $8M | 0.1% | 2026-Q2 |
| CastleKnight Management LP trimmed | 256,900 | $8M | 0.1% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. added | 247,087 | $6M | 0.1% | 2026-Q2 |
| CITIGROUP INC added | 226,636 | $7M | 0.1% | 2026-Q2 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM added | 226,554 | $7M | 0.1% | 2026-Q2 |
| Cannell & Spears LLC new | 225,978 | $7M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 212,827 | $6M | 0.1% | 2026-Q2 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE added | 212,389 | $6M | 0.1% | 2026-Q2 |
| READYSTATE ASSET MANAGEMENT LP trimmed | 198,950 | $6M | 0.1% | 2026-Q2 |
| Quantinno Capital Management LP added | 198,100 | $6M | 0.1% | 2026-Q2 |
| Retirement Systems of Alabama new | 194,970 | $6M | 0.1% | 2026-Q2 |
| Aequim Alternative Investments LP trimmed | 177,041 | $5M | 0.1% | 2026-Q2 |
| Verition Fund Management LLC added | 174,184 | $5M | 0.1% | 2026-Q2 |
| FIRST MANHATTAN CO. LLC. trimmed | 172,064 | $5M | 0.1% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 171,502 | $5M | 0.1% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. new | 170,537 | $5M | 0.1% | 2026-Q2 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. trimmed | 167,289 | $5M | 0.1% | 2026-Q2 |
| OSAIC HOLDINGS, INC. trimmed | 161,938 | $5M | 0.1% | 2026-Q2 |
| Waratah Capital Advisors Ltd. new | 160,836 | $5M | 0.1% | 2026-Q2 |
| IEQ CAPITAL, LLC trimmed | 156,252 | $5M | 0.1% | 2026-Q2 |
| Cerity Partners LLC added | 152,702 | $5M | 0.1% | 2026-Q2 |
| ALGERT GLOBAL LLC added | 151,892 | $4M | 0.1% | 2026-Q2 |
| Bridgewater Associates, LP added | 148,290 | $4M | 0.1% | 2026-Q2 |
| STOREBRAND ASSET MANAGEMENT AS | 147,000 | $4M | 0.1% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.