Who owns CMBT
Which tracked institutional funds hold CMBT, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See CMBT company fundamentals →
Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-18). 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
49 tracked funds added or opened CMBT while 19 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
CMBT’s largest tracked holder by dollar value, Encompass Capital Advisors LLC, sizes it at 1.8% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 1.8pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in CMBT 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 163 tracked filers holding CMBT, 82 increased or opened the position and 67 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 CMBT 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 17
- VANGUARD CAPITAL MANAGEMENT LLC$42M
- ARROWSTREET CAPITAL, LIMITED PARTNERSHIP$29M
- Qube Research & Technologies Ltd$14M
- VANGUARD FIDUCIARY TRUST CO$13M
- Trexquant Investment LP$8M
- Walleye Capital LLC$7M
Full exits 3
- VANGUARD GROUP INC$30M
- Sagil Capital LLP$13M
- Counterpoint Mutual Funds LLC$509K
Largest adds
- CITADEL ADVISORS LLC$21M
- Encompass Capital Advisors LLC$20M
- RENAISSANCE TECHNOLOGIES LLC$14M
- TWO SIGMA INVESTMENTS, LP$14M
- JPMORGAN CHASE & CO$13M
- Point72 Asset Management, L.P.$13M
Largest trims
- NORGES BANK$18M
- ROYAL BANK OF CANADA$10M
- MILLENNIUM MANAGEMENT LLC$9M
- GOLDMAN SACHS GROUP INC$4M
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$4M
- MARSHALL WACE, LLP$4M
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 |
|---|---|---|---|---|
| Encompass Capital Advisors LLC added | 3,500,000 | $44M | 7.2% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 3,241,144 | $42M | 6.8% | 2026-Q1 |
| FOLKETRYGDFONDET trimmed | 2,816,940 | $35M | 5.7% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 2,288,834 | $29M | 4.7% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 2,254,149 | $29M | 4.6% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC trimmed | 1,833,388 | $23M | 3.8% | 2026-Q1 |
| MORGAN STANLEY added | 1,564,063 | $20M | 3.2% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 1,408,300 | $18M | 2.9% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 1,387,612 | $18M | 2.9% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 1,209,818 | $15M | 2.5% | 2026-Q1 |
| Qube Research & Technologies Ltd added | 1,115,861 | $14M | 2.3% | 2026-Q1 |
| Point72 Asset Management, L.P. added | 1,084,740 | $14M | 2.2% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 1,072,822 | $14M | 2.2% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 1,080,655 | $13M | 2.2% | 2026-Q1 |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC added | 1,055,518 | $13M | 2.2% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 969,918 | $13M | 2.0% | 2026-Q1 |
| CITIGROUP INC added | 851,483 | $11M | 1.7% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS added | 838,669 | $11M | 1.7% | 2026-Q1 |
| FEARNLEY ASSET MANAGEMENT AS added | 700,737 | $9M | 1.4% | 2026-Q1 |
| BARCLAYS PLC added | 698,016 | $9M | 1.4% | 2026-Q1 |
| Trexquant Investment LP added | 654,098 | $8M | 1.3% | 2026-Q1 |
| Jump Financial, LLC added | 643,861 | $8M | 1.3% | 2026-Q1 |
| Walleye Capital LLC added | 570,371 | $7M | 1.2% | 2026-Q1 |
| Oceanic Investment Management LTD trimmed | 564,868 | $7M | 1.2% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 499,666 | $6M | 1.0% | 2026-Q1 |
| D. E. Shaw & Co., Inc. added | 492,158 | $6M | 1.0% | 2026-Q1 |
| Melqart Asset Management (UK) Ltd added | 418,161 | $5M | 0.9% | 2026-Q1 |
| GRAHAM CAPITAL WEALTH MANAGEMENT, LLC trimmed | 388,678 | $5M | 0.8% | 2026-Q1 |
| Allianz Asset Management GmbH trimmed | 380,147 | $5M | 0.8% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 378,364 | $5M | 0.8% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 371,253 | $5M | 0.8% | 2026-Q1 |
| XTX Topco Ltd added | 367,367 | $5M | 0.8% | 2026-Q1 |
| Aquatic Capital Management LLC added | 360,495 | $5M | 0.7% | 2026-Q1 |
| LPL Financial LLC added | 343,009 | $4M | 0.7% | 2026-Q1 |
| PDT Partners, LLC added | 328,763 | $4M | 0.7% | 2026-Q1 |
| BOOTHBAY FUND MANAGEMENT, LLC trimmed | 313,829 | $4M | 0.6% | 2026-Q1 |
| NORGES BANK trimmed | 403,092 | $4M | 0.6% | 2026-Q1 |
| Quantbot Technologies LP trimmed | 250,148 | $3M | 0.5% | 2026-Q1 |
| Swiss National Bank | 248,913 | $3M | 0.5% | 2026-Q1 |
| UBS Group AG trimmed | 233,250 | $3M | 0.5% | 2026-Q1 |
| SG Americas Securities, LLC added | 223,691 | $3M | 0.5% | 2026-Q1 |
| OCCUDO QUANTITATIVE STRATEGIES LP added | 176,863 | $2M | 0.4% | 2026-Q1 |
| Squarepoint Ops LLC added | 148,695 | $2M | 0.3% | 2026-Q1 |
| Engineers Gate Manager LP added | 146,255 | $2M | 0.3% | 2026-Q1 |
| Legal & General Group Plc trimmed | 144,313 | $2M | 0.3% | 2026-Q1 |
| Marnell Management LLC trimmed | 140,594 | $2M | 0.3% | 2026-Q1 |
| HRT FINANCIAL LP added | 129,923 | $2M | 0.3% | 2026-Q1 |
| GROUP ONE TRADING LLC trimmed | 110,934 | $1M | 0.2% | 2026-Q1 |
| Persistent Asset Partners Ltd added | 111,110 | $1M | 0.2% | 2026-Q1 |
| Numerai GP LLC new | 106,802 | $1M | 0.2% | 2026-Q1 |
| VANGUARD ASSET MANAGEMENT, Ltd new | 104,443 | $1M | 0.2% | 2026-Q1 |
| Nuveen, LLC | 91,122 | $1M | 0.2% | 2026-Q1 |
| BTG Pactual Asset Management US LLC new | 89,003 | $1M | 0.2% | 2026-Q1 |
| BlackRock, Inc. added | 83,483 | $1M | 0.2% | 2026-Q1 |
| PRELUDE CAPITAL MANAGEMENT, LLC trimmed | 80,374 | $1M | 0.2% | 2026-Q1 |
| Mitsubishi UFJ Asset Management Co., Ltd. added | 73,376 | $928K | 0.2% | 2026-Q1 |
| Kovack Advisors, Inc. trimmed | 63,698 | $806K | 0.1% | 2026-Q1 |
| Mariner, LLC trimmed | 62,618 | $792K | 0.1% | 2026-Q1 |
| Centiva Capital, LP added | 56,200 | $711K | 0.1% | 2026-Q1 |
| WINTON GROUP Ltd added | 53,000 | $670K | 0.1% | 2026-Q1 |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC | 51,269 | $649K | 0.1% | 2026-Q1 |
| Summit Financial, LLC added | 50,039 | $633K | 0.1% | 2026-Q1 |
| Quantinno Capital Management LP trimmed | 49,976 | $632K | 0.1% | 2026-Q1 |
| Tower Research Capital LLC (TRC) added | 49,312 | $624K | 0.1% | 2026-Q1 |
| IMC-Chicago, LLC trimmed | 45,632 | $577K | 0.1% | 2026-Q1 |
| ROYAL BANK OF CANADA trimmed | 44,985 | $569K | 0.1% | 2026-Q1 |
| Zurcher Kantonalbank (Zurich Cantonalbank) added | 42,519 | $536K | 0.1% | 2026-Q1 |
| Sigma Planning Corp added | 41,143 | $520K | 0.1% | 2026-Q1 |
| SIMPLEX TRADING, LLC trimmed | 39,909 | $505K | 0.1% | 2026-Q1 |
| HIGHLAND CAPITAL MANAGEMENT, LLC trimmed | 36,750 | $465K | 0.1% | 2026-Q1 |
| Sciencast Management LP trimmed | 36,275 | $459K | 0.1% | 2026-Q1 |
| FMR LLC trimmed | 35,389 | $457K | 0.1% | 2026-Q1 |
| Vident Advisory, LLC trimmed | 35,446 | $448K | 0.1% | 2026-Q1 |
| Vanguard Investments Australia, Ltd. new | 33,539 | $433K | 0.1% | 2026-Q1 |
| OSAIC HOLDINGS, INC. added | 33,872 | $428K | 0.1% | 2026-Q1 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM | 33,391 | $422K | 0.1% | 2026-Q1 |
| Lester Murray Antman dba SimplyRich trimmed | 33,166 | $419K | 0.1% | 2026-Q1 |
| Schonfeld Strategic Advisors LLC trimmed | 31,964 | $404K | 0.1% | 2026-Q1 |
| Vanguard Global Advisers, LLC new | 31,043 | $401K | 0.1% | 2026-Q1 |
| Focus Partners Wealth new | 30,233 | $382K | 0.1% | 2026-Q1 |
| TWO SIGMA SECURITIES, LLC added | 28,847 | $365K | 0.1% | 2026-Q1 |
| Headlands Technologies LLC trimmed | 28,176 | $356K | 0.1% | 2026-Q1 |
| MARSHALL WACE, LLP trimmed | 27,410 | $347K | 0.1% | 2026-Q1 |
| Bellecapital International Ltd. new | 26,185 | $331K | 0.1% | 2026-Q1 |
| Vanguard Personalized Indexing Management, LLC trimmed | 23,998 | $304K | 0.0% | 2026-Q1 |
| STATE STREET CORP trimmed | 23,724 | $300K | 0.0% | 2026-Q1 |
| Pictet Asset Management Holding SA | 22,774 | $287K | 0.0% | 2026-Q1 |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO added | 22,709 | $286K | 0.0% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 3,203,786 | $30M | 4.9% | 2025-Q4 stale |
| MIRABELLA FINANCIAL SERVICES LLP added | 2,384,078 | $22M | 3.6% | 2025-Q3 stale |
| Sagil Capital LLP added | 1,397,397 | $13M | 2.2% | 2025-Q4 stale |
| Verition Fund Management LLC added | 529,283 | $5M | 0.8% | 2025-Q3 stale |
| Uniplan Investment Counsel, Inc. added | 391,064 | $4M | 0.6% | 2025-Q3 stale |
| Cubist Systematic Strategies, LLC trimmed | 102,096 | $959K | 0.2% | 2025-Q3 stale |
| ENVESTNET ASSET MANAGEMENT INC added | 72,320 | $679K | 0.1% | 2025-Q3 stale |
| AdvisorShares Investments LLC new | 54,373 | $511K | 0.1% | 2025-Q3 stale |
| Counterpoint Mutual Funds LLC new | 52,764 | $509K | 0.1% | 2025-Q4 stale |
| FourWorld Capital Management LLC added | 53,607 | $503K | 0.1% | 2025-Q3 stale |
| WIT Partners Advisory Pte. Ltd. | 51,735 | $474K | 0.1% | 2025-Q4 stale |
| National Philanthropic Trust added | 43,598 | $421K | 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.