Who owns CTKB (CTKB)
Which tracked institutional funds hold CTKB, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See CTKB 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
11 tracked funds added or opened CTKB while 29 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
CTKB’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in CTKB 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 165 tracked filers holding CTKB, 90 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 CTKB 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 4
- VANGUARD CAPITAL MANAGEMENT LLC$21M
- VANGUARD PORTFOLIO MANAGEMENT LLC$10M
- CenterBook Partners LP$3M
- VANGUARD FIDUCIARY TRUST CO$3M
Full exits 3
- VANGUARD GROUP INC$34M
- WELLINGTON MANAGEMENT GROUP LLP$4M
- Point72 Asset Management, L.P.$577K
Largest adds
- MILLENNIUM MANAGEMENT LLC$3M
- Simcoe Capital LLC$2M
- CITADEL ADVISORS LLC$1M
- GOLDMAN SACHS GROUP INC$1M
- Russell Investments Group, Ltd.$887K
- TUDOR INVESTMENT CORP ET AL$535K
Largest trims
- BlackRock, Inc.$12M
- Topline Capital Management, LLC$7M
- HHLR ADVISORS, LTD.$5M
- M&T Bank Corp$4M
- BROWN CAPITAL MANAGEMENT LLC$4M
- STATE STREET CORP$3M
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 |
|---|---|---|---|---|
| BlackRock, Inc. trimmed | 17,007,269 | $74M | 18.0% | 2026-Q1 |
| Topline Capital Management, LLC trimmed | 7,064,481 | $31M | 7.5% | 2026-Q1 |
| HHLR ADVISORS, LTD. | 6,657,030 | $29M | 7.0% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 6,291,798 | $27M | 6.6% | 2026-Q1 |
| Boston Partners added | 5,802,773 | $25M | 6.1% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 4,762,904 | $21M | 5.0% | 2026-Q1 |
| STATE STREET CORP trimmed | 4,123,748 | $18M | 4.4% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 2,833,955 | $12M | 3.0% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 2,663,329 | $12M | 2.8% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 2,344,735 | $10M | 2.5% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 2,311,858 | $10M | 2.4% | 2026-Q1 |
| MORGAN STANLEY added | 1,718,875 | $8M | 1.8% | 2026-Q1 |
| ROYCE & ASSOCIATES LP trimmed | 1,642,368 | $7M | 1.7% | 2026-Q1 |
| BROWN CAPITAL MANAGEMENT LLC trimmed | 1,480,506 | $6M | 1.6% | 2026-Q1 |
| Russell Investments Group, Ltd. added | 1,359,900 | $6M | 1.4% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 1,104,601 | $5M | 1.2% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 1,009,054 | $4M | 1.1% | 2026-Q1 |
| NORTHERN TRUST CORP added | 1,005,193 | $4M | 1.1% | 2026-Q1 |
| Simcoe Capital LLC added | 882,113 | $4M | 0.9% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 875,792 | $4M | 0.9% | 2026-Q1 |
| CenterBook Partners LP trimmed | 729,874 | $3M | 0.8% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 717,011 | $3M | 0.8% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 676,700 | $3M | 0.7% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 608,647 | $3M | 0.6% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC trimmed | 534,759 | $2M | 0.6% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 471,392 | $2M | 0.5% | 2026-Q1 |
| HRT FINANCIAL LP trimmed | 414,052 | $2M | 0.4% | 2026-Q1 |
| ACADIAN ASSET MANAGEMENT LLC trimmed | 398,988 | $2M | 0.4% | 2026-Q1 |
| Public Sector Pension Investment Board added | 394,718 | $2M | 0.4% | 2026-Q1 |
| Invesco Ltd. trimmed | 388,233 | $2M | 0.4% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL added | 320,715 | $1M | 0.3% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP trimmed | 319,909 | $1M | 0.3% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 299,090 | $1M | 0.3% | 2026-Q1 |
| FMR LLC added | 283,386 | $1M | 0.3% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC trimmed | 281,681 | $1M | 0.3% | 2026-Q1 |
| D. E. Shaw & Co., Inc. trimmed | 260,125 | $1M | 0.3% | 2026-Q1 |
| JACOBS LEVY EQUITY MANAGEMENT, INC trimmed | 257,292 | $1M | 0.3% | 2026-Q1 |
| RHUMBLINE ADVISERS added | 254,589 | $1M | 0.3% | 2026-Q1 |
| Nuveen, LLC trimmed | 245,521 | $1M | 0.3% | 2026-Q1 |
| Connor, Clark & Lunn Investment Management Ltd. trimmed | 241,504 | $1M | 0.3% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC trimmed | 187,270 | $818K | 0.2% | 2026-Q1 |
| UBS Group AG trimmed | 186,881 | $817K | 0.2% | 2026-Q1 |
| Legal & General Group Plc trimmed | 182,860 | $799K | 0.2% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. | 141,048 | $712K | 0.2% | 2026-Q1 |
| IEQ CAPITAL, LLC added | 144,392 | $631K | 0.2% | 2026-Q1 |
| VOYA INVESTMENT MANAGEMENT LLC added | 141,385 | $618K | 0.1% | 2026-Q1 |
| PRUDENTIAL FINANCIAL INC added | 117,597 | $514K | 0.1% | 2026-Q1 |
| FRANKLIN RESOURCES INC added | 113,973 | $498K | 0.1% | 2026-Q1 |
| Numerai GP LLC trimmed | 112,460 | $491K | 0.1% | 2026-Q1 |
| GSA CAPITAL PARTNERS LLP added | 109,116 | $477K | 0.1% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 104,437 | $456K | 0.1% | 2026-Q1 |
| STATE OF WISCONSIN INVESTMENT BOARD trimmed | 104,046 | $455K | 0.1% | 2026-Q1 |
| Creative Planning trimmed | 89,937 | $393K | 0.1% | 2026-Q1 |
| PDT Partners, LLC trimmed | 86,869 | $380K | 0.1% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 80,142 | $351K | 0.1% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 78,044 | $341K | 0.1% | 2026-Q1 |
| Thrivent Financial for Lutherans trimmed | 73,399 | $321K | 0.1% | 2026-Q1 |
| MetLife Investment Management, LLC added | 64,517 | $282K | 0.1% | 2026-Q1 |
| State of Alaska, Department of Revenue | 61,269 | $267K | 0.1% | 2026-Q1 |
| Illinois Municipal Retirement Fund new | 60,877 | $266K | 0.1% | 2026-Q1 |
| CWM, LLC added | 60,724 | $265K | 0.1% | 2026-Q1 |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC added | 72,700 | $260K | 0.1% | 2026-Q1 |
| Cerity Partners LLC added | 58,123 | $254K | 0.1% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 56,010 | $245K | 0.1% | 2026-Q1 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 55,145 | $241K | 0.1% | 2026-Q1 |
| PANAGORA ASSET MANAGEMENT INC | 51,593 | $225K | 0.1% | 2026-Q1 |
| Quantinno Capital Management LP added | 51,212 | $224K | 0.1% | 2026-Q1 |
| Louisiana State Employees Retirement System trimmed | 48,800 | $213K | 0.1% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN trimmed | 45,277 | $198K | 0.0% | 2026-Q1 |
| Vanguard Global Advisers, LLC new | 45,212 | $198K | 0.0% | 2026-Q1 |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM trimmed | 44,829 | $196K | 0.0% | 2026-Q1 |
| ALGERT GLOBAL LLC trimmed | 42,560 | $186K | 0.0% | 2026-Q1 |
| CANADA PENSION PLAN INVESTMENT BOARD added | 41,300 | $180K | 0.0% | 2026-Q1 |
| nVerses Capital, LLC new | 38,319 | $167K | 0.0% | 2026-Q1 |
| NEW YORK STATE COMMON RETIREMENT FUND | 34,922 | $153K | 0.0% | 2026-Q1 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM | 34,670 | $152K | 0.0% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 6,742,091 | $34M | 8.2% | 2025-Q4 stale |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 764,279 | $4M | 0.9% | 2025-Q4 stale |
| Acuitas Investments, LLC new | 331,219 | $1M | 0.3% | 2025-Q1 stale |
| GLOBEFLEX CAPITAL L P | 290,511 | $988K | 0.2% | 2025-Q2 stale |
| Swiss National Bank | 212,100 | $721K | 0.2% | 2025-Q2 stale |
| Point72 Asset Management, L.P. trimmed | 114,256 | $577K | 0.1% | 2025-Q4 stale |
| Cubist Systematic Strategies, LLC added | 156,359 | $543K | 0.1% | 2025-Q3 stale |
| MARSHALL WACE, LLP trimmed | 134,286 | $466K | 0.1% | 2025-Q3 stale |
| JANE STREET GROUP, LLC trimmed | 78,758 | $398K | 0.1% | 2025-Q4 stale |
| Graham Capital Management, L.P. added | 82,286 | $330K | 0.1% | 2025-Q1 stale |
| TEACHER RETIREMENT SYSTEM OF TEXAS added | 92,638 | $315K | 0.1% | 2025-Q2 stale |
| Allianz Asset Management GmbH added | 74,000 | $297K | 0.1% | 2025-Q1 stale |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO added | 81,106 | $281K | 0.1% | 2025-Q3 stale |
| Corebridge Financial, Inc. trimmed | 61,718 | $247K | 0.1% | 2025-Q1 stale |
| CAXTON ASSOCIATES LLP trimmed | 45,376 | $229K | 0.1% | 2025-Q4 stale |
| JANUS HENDERSON GROUP PLC | 64,873 | $221K | 0.1% | 2025-Q2 stale |
| Summit Global Investments added | 54,873 | $220K | 0.1% | 2025-Q1 stale |
| ExodusPoint Capital Management, LP trimmed | 62,970 | $219K | 0.1% | 2025-Q3 stale |
| TWO SIGMA ADVISERS, LP trimmed | 61,600 | $214K | 0.1% | 2025-Q3 stale |
| Quantbot Technologies LP added | 38,533 | $195K | 0.0% | 2025-Q4 stale |
| XTX Topco Ltd trimmed | 34,565 | $175K | 0.0% | 2025-Q4 stale |
| Brevan Howard Capital Management LP trimmed | 47,480 | $165K | 0.0% | 2025-Q3 stale |
| EntryPoint Capital, LLC trimmed | 47,746 | $162K | 0.0% | 2025-Q2 stale |
| Trexquant Investment LP trimmed | 45,131 | $153K | 0.0% | 2025-Q2 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.