Who owns CCOI (CCOI)
Which tracked institutional funds hold CCOI, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See CCOI 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
37 tracked funds added or opened CCOI while 64 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
CCOI’s largest tracked holder by dollar value, TURTLE CREEK ASSET MANAGEMENT INC., sizes it at 4.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 3.9pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in CCOI 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 233 tracked filers holding CCOI, 120 increased or opened the position and 136 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
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 CCOI 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 14
- VANGUARD PORTFOLIO MANAGEMENT LLC$52M
- VANGUARD CAPITAL MANAGEMENT LLC$40M
- VANGUARD FIDUCIARY TRUST CO$6M
- PDT Partners, LLC$5M
- FourWorld Capital Management LLC$5M
- TUDOR INVESTMENT CORP ET AL$3M
Full exits 15
- VANGUARD GROUP INC$111M
- FIRST TRUST ADVISORS LP$25M
- MIG Capital, LLC$12M
- Redmond Asset Management, LLC$4M
- Nishkama Capital, LLC$4M
- 14B Captial Management LP$4M
Largest adds
- TURTLE CREEK ASSET MANAGEMENT INC.$68M
- HRT FINANCIAL LP$9M
- MORGAN STANLEY$8M
- D. E. Shaw & Co., Inc.$8M
- DigitalBridge Group, Inc.$8M
- Park West Asset Management LLC$6M
Largest trims
- BlackRock, Inc.$22M
- BANK OF AMERICA CORP /DE/$20M
- ROYAL BANK OF CANADA$11M
- Harspring Capital Management, LLC$10M
- FMR LLC$10M
- EdgePoint Investment Group Inc.$6M
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 |
|---|---|---|---|---|
| TURTLE CREEK ASSET MANAGEMENT INC. added | 8,252,844 | $155M | 10.6% | 2026-Q1 |
| BlackRock, Inc. trimmed | 7,075,372 | $133M | 9.1% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 2,748,759 | $52M | 3.5% | 2026-Q1 |
| EdgePoint Investment Group Inc. | 2,283,378 | $43M | 2.9% | 2026-Q1 |
| STATE STREET CORP added | 2,273,265 | $43M | 2.9% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 2,120,531 | $40M | 2.7% | 2026-Q1 |
| Park West Asset Management LLC added | 1,935,201 | $36M | 2.5% | 2026-Q1 |
| MORGAN STANLEY added | 1,883,072 | $35M | 2.4% | 2026-Q1 |
| Newtyn Management, LLC added | 1,600,000 | $30M | 2.0% | 2026-Q1 |
| MAGNOLIA GROUP, LLC added | 1,290,204 | $24M | 1.7% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,205,635 | $23M | 1.5% | 2026-Q1 |
| DigitalBridge Group, Inc. added | 1,142,952 | $22M | 1.5% | 2026-Q1 |
| Harspring Capital Management, LLC trimmed | 1,087,000 | $20M | 1.4% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 760,117 | $14M | 1.0% | 2026-Q1 |
| D. E. Shaw & Co., Inc. added | 738,815 | $14M | 0.9% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 712,934 | $13M | 0.9% | 2026-Q1 |
| Oakum Bay Capital LLC added | 690,374 | $13M | 0.9% | 2026-Q1 |
| Broad Run Investment Management, LLC trimmed | 663,200 | $12M | 0.8% | 2026-Q1 |
| HRT FINANCIAL LP added | 509,095 | $10M | 0.7% | 2026-Q1 |
| BlackBarn Capital Partners LP trimmed | 500,000 | $9M | 0.6% | 2026-Q1 |
| GILDER GAGNON HOWE & CO LLC added | 499,290 | $9M | 0.6% | 2026-Q1 |
| NORTHERN TRUST CORP trimmed | 497,195 | $9M | 0.6% | 2026-Q1 |
| CenterBook Partners LP trimmed | 494,283 | $9M | 0.6% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 492,468 | $9M | 0.6% | 2026-Q1 |
| 683 Capital Management, LLC trimmed | 450,300 | $8M | 0.6% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 426,280 | $8M | 0.5% | 2026-Q1 |
| UBS Group AG added | 425,968 | $8M | 0.5% | 2026-Q1 |
| FMR LLC trimmed | 424,535 | $8M | 0.5% | 2026-Q1 |
| FRONTIER CAPITAL MANAGEMENT CO LLC added | 399,208 | $8M | 0.5% | 2026-Q1 |
| BOOTHBAY FUND MANAGEMENT, LLC added | 378,929 | $7M | 0.5% | 2026-Q1 |
| Palliser Capital (UK) Ltd trimmed | 334,444 | $6M | 0.4% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 334,428 | $6M | 0.4% | 2026-Q1 |
| Granahan Investment Management, LLC added | 317,447 | $6M | 0.4% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 302,393 | $6M | 0.4% | 2026-Q1 |
| PDT Partners, LLC added | 283,629 | $5M | 0.4% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 277,486 | $5M | 0.4% | 2026-Q1 |
| FourWorld Capital Management LLC new | 265,500 | $5M | 0.3% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 264,569 | $5M | 0.3% | 2026-Q1 |
| HERALD INVESTMENT MANAGEMENT Ltd | 242,600 | $5M | 0.3% | 2026-Q1 |
| Invesco Ltd. trimmed | 242,426 | $5M | 0.3% | 2026-Q1 |
| Walleye Capital LLC added | 239,557 | $5M | 0.3% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC added | 232,206 | $4M | 0.3% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 228,396 | $4M | 0.3% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 201,739 | $4M | 0.3% | 2026-Q1 |
| Public Sector Pension Investment Board added | 169,759 | $3M | 0.2% | 2026-Q1 |
| Nuveen, LLC trimmed | 168,500 | $3M | 0.2% | 2026-Q1 |
| BLAIR WILLIAM & CO/IL trimmed | 166,521 | $3M | 0.2% | 2026-Q1 |
| Advisors Asset Management, Inc. trimmed | 149,698 | $3M | 0.2% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL added | 139,692 | $3M | 0.2% | 2026-Q1 |
| RHUMBLINE ADVISERS added | 137,920 | $3M | 0.2% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 136,701 | $3M | 0.2% | 2026-Q1 |
| BLUEFIN CAPITAL MANAGEMENT, LLC trimmed | 132,304 | $2M | 0.2% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 130,113 | $2M | 0.2% | 2026-Q1 |
| Quantinno Capital Management LP added | 108,875 | $2M | 0.1% | 2026-Q1 |
| Legal & General Group Plc trimmed | 106,632 | $2M | 0.1% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN added | 98,681 | $2M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 5,161,750 | $111M | 7.6% | 2025-Q4 stale |
| Hood River Capital Management LLC trimmed | 1,211,918 | $74M | 5.0% | 2025-Q1 stale |
| WESTWOOD HOLDINGS GROUP INC added | 673,921 | $41M | 2.8% | 2025-Q1 stale |
| Tyro Capital Management LLC added | 935,287 | $36M | 2.4% | 2025-Q3 stale |
| FIRST TRUST ADVISORS LP added | 1,177,398 | $25M | 1.7% | 2025-Q4 stale |
| DIMENSIONAL FUND ADVISORS LP added | 348,066 | $21M | 1.4% | 2025-Q1 stale |
| Capital World Investors trimmed | 528,382 | $20M | 1.4% | 2025-Q3 stale |
| Senator Investment Group LP trimmed | 483,295 | $19M | 1.3% | 2025-Q3 stale |
| SG Capital Management LLC added | 313,250 | $15M | 1.0% | 2025-Q2 stale |
| JENNISON ASSOCIATES LLC added | 342,316 | $13M | 0.9% | 2025-Q3 stale |
| CAPTRUST FINANCIAL ADVISORS trimmed | 336,061 | $13M | 0.9% | 2025-Q3 stale |
| Ulysses Management LLC trimmed | 335,982 | $13M | 0.9% | 2025-Q3 stale |
| MIG Capital, LLC trimmed | 569,220 | $12M | 0.8% | 2025-Q4 stale |
| River Road Asset Management, LLC added | 242,051 | $11M | 0.7% | 2025-Q2 stale |
| Medina Value Partners, LLC new | 277,172 | $11M | 0.7% | 2025-Q3 stale |
| M&G PLC trimmed | 256,041 | $10M | 0.7% | 2025-Q3 stale |
| INTRINSIC EDGE CAPITAL MANAGEMENT LLC added | 180,000 | $9M | 0.6% | 2025-Q2 stale |
| Ceredex Value Advisors LLC | 206,800 | $8M | 0.5% | 2025-Q3 stale |
| LOOMIS SAYLES & CO L P added | 121,751 | $7M | 0.5% | 2025-Q1 stale |
| Redmond Asset Management, LLC added | 200,082 | $4M | 0.3% | 2025-Q4 stale |
| MARSHALL WACE, LLP added | 104,906 | $4M | 0.3% | 2025-Q3 stale |
| Nishkama Capital, LLC added | 179,661 | $4M | 0.3% | 2025-Q4 stale |
| 14B Captial Management LP trimmed | 170,000 | $4M | 0.2% | 2025-Q4 stale |
| NORGES BANK trimmed | 47,181 | $4M | 0.2% | 2025-Q3 stale |
| Edgestream Partners, L.P. added | 165,979 | $4M | 0.2% | 2025-Q4 stale |
| BEACONLIGHT CAPITAL, LLC trimmed | 92,910 | $4M | 0.2% | 2025-Q3 stale |
| EMERALD MUTUAL FUND ADVISERS TRUST trimmed | 87,356 | $3M | 0.2% | 2025-Q3 stale |
| Madison Asset Management, LLC trimmed | 83,719 | $3M | 0.2% | 2025-Q3 stale |
| HUSSMAN STRATEGIC ADVISORS, INC. added | 63,000 | $3M | 0.2% | 2025-Q2 stale |
| Crescent Park Management, L.P. trimmed | 62,368 | $3M | 0.2% | 2025-Q2 stale |
| ENVESTNET ASSET MANAGEMENT INC trimmed | 60,647 | $3M | 0.2% | 2025-Q2 stale |
| Taylor Frigon Capital Management LLC added | 73,271 | $3M | 0.2% | 2025-Q3 stale |
| DARK FOREST CAPITAL MANAGEMENT LP added | 54,788 | $3M | 0.2% | 2025-Q2 stale |
| Advantage Alpha Capital Partners LP trimmed | 68,826 | $3M | 0.2% | 2025-Q3 stale |
| Holocene Advisors, LP added | 68,150 | $3M | 0.2% | 2025-Q3 stale |
| Inspire Advisors, LLC added | 64,875 | $2M | 0.2% | 2025-Q3 stale |
| GLOBALT Investments LLC / GA trimmed | 49,360 | $2M | 0.2% | 2025-Q2 stale |
| Qube Research & Technologies Ltd trimmed | 61,841 | $2M | 0.2% | 2025-Q3 stale |
| Azimuth Capital Investment Management LLC trimmed | 44,655 | $2M | 0.1% | 2025-Q2 stale |
| ALGERT GLOBAL LLC added | 55,520 | $2M | 0.1% | 2025-Q3 stale |
| Harber Asset Management LLC trimmed | 54,944 | $2M | 0.1% | 2025-Q3 stale |
| CPC Advisors, LLC added | 52,218 | $2M | 0.1% | 2025-Q3 stale |
| State of New Jersey Common Pension Fund D added | 41,034 | $2M | 0.1% | 2025-Q2 stale |
| Atom Investors LP added | 49,792 | $2M | 0.1% | 2025-Q3 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.