Who owns SIRI (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-Q1 13F filings. 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
153 tracked funds added or opened SIRI while 55 trimmed or exited it between 2025-Q4 and 2026-Q1 — 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 1.1% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 1.1pp 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 2025-Q4 and 2026-Q1, across 558 tracked filers holding SIRI, 301 increased or opened the position and 196 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
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 2025-Q4 and 2026-Q1 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
- VANGUARD PORTFOLIO MANAGEMENT LLC$201M
- VANGUARD CAPITAL MANAGEMENT LLC$192M
- Gates Capital Management, Inc.$63M
- VANGUARD FIDUCIARY TRUST CO$27M
- HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND$21M
- PANAGORA ASSET MANAGEMENT INC$15M
Full exits 24
- VANGUARD GROUP INC$338M
- Pacer Advisors, Inc.$35M
- TWO SIGMA ADVISERS, LP$19M
- J. Goldman & Co LP$14M
- Alberta Investment Management Corp$12M
- Cadence Bank$8M
Largest adds
- BERKSHIRE HATHAWAY INC$385M
- DIMENSIONAL FUND ADVISORS LP$111M
- CITADEL ADVISORS LLC$59M
- CANADA PENSION PLAN INVESTMENT BOARD$52M
- AQR CAPITAL MANAGEMENT LLC$39M
- HRT FINANCIAL LP$35M
Largest trims
- D. E. Shaw & Co., Inc.$64M
- NORGES BANK$19M
- Point72 Asset Management, L.P.$11M
- TWO SIGMA INVESTMENTS, LP$9M
- HBK INVESTMENTS L P$7M
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$7M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BERKSHIRE HATHAWAY INC | 124,807,117 | $2.9B | 44.8% | 2026-Q1 |
| BlackRock, Inc. trimmed | 9,625,184 | $222M | 3.5% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 8,704,748 | $201M | 3.1% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 8,303,630 | $192M | 3.0% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 6,301,181 | $145M | 2.3% | 2026-Q1 |
| Kontiki Capital Management (HK) Ltd. trimmed | 5,696,724 | $131M | 2.0% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 3,913,128 | $90M | 1.4% | 2026-Q1 |
| CANADA PENSION PLAN INVESTMENT BOARD added | 3,860,924 | $89M | 1.4% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 3,706,711 | $86M | 1.3% | 2026-Q1 |
| STATE STREET CORP added | 3,547,616 | $82M | 1.3% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 3,261,642 | $75M | 1.2% | 2026-Q1 |
| LSV ASSET MANAGEMENT added | 3,219,977 | $74M | 1.2% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 2,983,163 | $68M | 1.1% | 2026-Q1 |
| CHECK CAPITAL MANAGEMENT INC/CA added | 2,942,595 | $68M | 1.1% | 2026-Q1 |
| Gates Capital Management, Inc. new | 2,742,359 | $63M | 1.0% | 2026-Q1 |
| THOMPSON SIEGEL & WALMSLEY LLC added | 2,564,565 | $59M | 0.9% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC added | 2,414,999 | $56M | 0.9% | 2026-Q1 |
| Bank of New York Mellon Corp added | 2,177,761 | $50M | 0.8% | 2026-Q1 |
| MORGAN STANLEY added | 2,156,763 | $50M | 0.8% | 2026-Q1 |
| SEIZERT CAPITAL PARTNERS, LLC trimmed | 1,840,822 | $42M | 0.7% | 2026-Q1 |
| HSBC HOLDINGS PLC trimmed | 1,795,954 | $42M | 0.6% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP trimmed | 1,777,219 | $41M | 0.6% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 1,740,191 | $40M | 0.6% | 2026-Q1 |
| NORGES BANK trimmed | 1,700,664 | $38M | 0.6% | 2026-Q1 |
| HRT FINANCIAL LP added | 1,565,725 | $36M | 0.6% | 2026-Q1 |
| PRIVATE MANAGEMENT GROUP INC added | 1,352,602 | $31M | 0.5% | 2026-Q1 |
| WEITZ INVESTMENT MANAGEMENT, INC. trimmed | 1,293,000 | $30M | 0.5% | 2026-Q1 |
| Gotham Asset Management, LLC added | 1,238,571 | $29M | 0.4% | 2026-Q1 |
| Tidal Investments LLC trimmed | 1,208,449 | $28M | 0.4% | 2026-Q1 |
| UBS Group AG trimmed | 1,180,876 | $27M | 0.4% | 2026-Q1 |
| HBK INVESTMENTS L P trimmed | 1,164,203 | $27M | 0.4% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 1,161,228 | $27M | 0.4% | 2026-Q1 |
| WITTENBERG INVESTMENT MANAGEMENT, INC. added | 1,107,416 | $26M | 0.4% | 2026-Q1 |
| NORTHERN TRUST CORP added | 1,096,087 | $25M | 0.4% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC added | 953,340 | $22M | 0.3% | 2026-Q1 |
| FIRST TRUST ADVISORS LP added | 952,013 | $22M | 0.3% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 955,854 | $22M | 0.3% | 2026-Q1 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND added | 901,000 | $21M | 0.3% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 899,785 | $21M | 0.3% | 2026-Q1 |
| Penserra Capital Management LLC added | 815,137 | $19M | 0.3% | 2026-Q1 |
| Allianz Asset Management GmbH added | 809,069 | $19M | 0.3% | 2026-Q1 |
| BARCLAYS PLC added | 720,775 | $17M | 0.3% | 2026-Q1 |
| Empyrean Capital Partners, LP | 692,775 | $16M | 0.2% | 2026-Q1 |
| PRUDENTIAL FINANCIAL INC added | 691,237 | $16M | 0.2% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 668,355 | $15M | 0.2% | 2026-Q1 |
| Hi-Line Capital Management, LLC added | 667,677 | $15M | 0.2% | 2026-Q1 |
| PANAGORA ASSET MANAGEMENT INC added | 650,212 | $15M | 0.2% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 614,562 | $14M | 0.2% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 609,494 | $14M | 0.2% | 2026-Q1 |
| BISLETT MANAGEMENT, LLC | 600,000 | $14M | 0.2% | 2026-Q1 |
| S&CO INC trimmed | 581,427 | $13M | 0.2% | 2026-Q1 |
| CAPITAL MANAGEMENT CORP /VA added | 530,536 | $12M | 0.2% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 509,053 | $12M | 0.2% | 2026-Q1 |
| PDT Partners, LLC added | 475,186 | $11M | 0.2% | 2026-Q1 |
| Advisors Asset Management, Inc. trimmed | 452,870 | $10M | 0.2% | 2026-Q1 |
| GABELLI FUNDS LLC trimmed | 452,758 | $10M | 0.2% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS added | 449,827 | $10M | 0.2% | 2026-Q1 |
| READYSTATE ASSET MANAGEMENT LP trimmed | 439,294 | $10M | 0.2% | 2026-Q1 |
| swisspartners Advisors Ltd added | 419,336 | $10M | 0.1% | 2026-Q1 |
| CastleKnight Management LP added | 413,700 | $10M | 0.1% | 2026-Q1 |
| Chou Associates Management Inc. | 409,589 | $9M | 0.1% | 2026-Q1 |
| GAMCO INVESTORS, INC. ET AL trimmed | 403,959 | $9M | 0.1% | 2026-Q1 |
| Cambria Investment Management, L.P. new | 398,191 | $9M | 0.1% | 2026-Q1 |
| Aequim Alternative Investments LP added | 393,124 | $9M | 0.1% | 2026-Q1 |
| Swiss National Bank | 365,085 | $8M | 0.1% | 2026-Q1 |
| Point72 Asset Management, L.P. trimmed | 355,082 | $8M | 0.1% | 2026-Q1 |
| Ninety One UK Ltd | 342,090 | $8M | 0.1% | 2026-Q1 |
| TOWERVIEW LLC | 335,300 | $8M | 0.1% | 2026-Q1 |
| SEI INVESTMENTS CO added | 311,310 | $7M | 0.1% | 2026-Q1 |
| Invesco Ltd. trimmed | 310,575 | $7M | 0.1% | 2026-Q1 |
| Nuveen, LLC added | 286,806 | $7M | 0.1% | 2026-Q1 |
| BALYASNY ASSET MANAGEMENT L.P. trimmed | 283,289 | $7M | 0.1% | 2026-Q1 |
| Creative Planning added | 276,284 | $6M | 0.1% | 2026-Q1 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. trimmed | 275,309 | $6M | 0.1% | 2026-Q1 |
| ExodusPoint Capital Management, LP added | 269,655 | $6M | 0.1% | 2026-Q1 |
| Mitsubishi UFJ Trust & Banking Corp added | 255,349 | $6M | 0.1% | 2026-Q1 |
| OSAIC HOLDINGS, INC. trimmed | 250,075 | $6M | 0.1% | 2026-Q1 |
| Legal & General Group Plc trimmed | 238,790 | $6M | 0.1% | 2026-Q1 |
| FIRST MANHATTAN CO. LLC. trimmed | 228,472 | $5M | 0.1% | 2026-Q1 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 216,894 | $5M | 0.1% | 2026-Q1 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 216,448 | $5M | 0.1% | 2026-Q1 |
| State of Alaska, Department of Revenue | 204,242 | $5M | 0.1% | 2026-Q1 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM trimmed | 197,409 | $5M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 16,889,411 | $338M | 5.3% | 2025-Q4 stale |
| FPR PARTNERS LLC trimmed | 4,395,520 | $99M | 1.5% | 2025-Q1 stale |
| Smead Capital Management, Inc. trimmed | 2,450,931 | $55M | 0.9% | 2025-Q1 stale |
| Brandywine Global Investment Management, LLC trimmed | 1,740,601 | $39M | 0.6% | 2025-Q1 stale |
| Pacer Advisors, Inc. added | 1,727,827 | $35M | 0.5% | 2025-Q4 stale |
| Wealthquest Corp new | 343,360 | $30M | 0.5% | 2025-Q1 stale |
| TWO SIGMA ADVISERS, LP added | 973,804 | $19M | 0.3% | 2025-Q4 stale |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP trimmed | 736,453 | $17M | 0.3% | 2025-Q1 stale |
| J. Goldman & Co LP trimmed | 710,364 | $14M | 0.2% | 2025-Q4 stale |
| Alberta Investment Management Corp trimmed | 620,000 | $12M | 0.2% | 2025-Q4 stale |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC added | 367,534 | $9M | 0.1% | 2025-Q3 stale |
| Cadence Bank trimmed | 384,859 | $8M | 0.1% | 2025-Q4 stale |
| Cubist Systematic Strategies, LLC trimmed | 282,177 | $7M | 0.1% | 2025-Q3 stale |
| Hall Kathryn A. | 262,033 | $6M | 0.1% | 2025-Q3 stale |
| Susquehanna Portfolio Strategies, LLC added | 252,012 | $6M | 0.1% | 2025-Q3 stale |
| CW Advisors, LLC added | 229,406 | $5M | 0.1% | 2025-Q2 stale |
| Weiss Asset Management LP new | 236,149 | $5M | 0.1% | 2025-Q4 stale |
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.