Who owns CYBN (CYBN)
Which tracked institutional funds hold CYBN, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See CYBN 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
The tracked-fund tape on CYBN is one-sided between 2025-Q4 and 2026-Q1: 3 added or opened and 31 trimmed or exited — on balance reducing.
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
CYBN’s largest tracked holder by dollar value, Venrock Adviser, LLC, sizes it at 0.7% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.7pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in CYBN 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 80 tracked filers holding CYBN, 32 increased or opened the position and 38 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 CYBN 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 2
- HRT FINANCIAL LP$897K
- ROYCE & ASSOCIATES LP$744K
Full exits 4
- Spruce Street Capital LP$6M
- ArrowMark Colorado Holdings LLC$5M
- Squadron Capital Management LLC$4M
- Quadrature Capital Ltd$652K
Largest adds
- MILLENNIUM MANAGEMENT LLC$3M
Largest trims
- Point72 Asset Management, L.P.$36M
- ORBIMED ADVISORS LLC$13M
- Venrock Adviser, LLC$13M
- Deep Track Capital, LP$9M
- Rosalind Advisors, Inc.$6M
- MORGAN STANLEY$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 |
|---|---|---|---|---|
| Venrock Adviser, LLC added | 3,851,654 | $18M | 12.6% | 2026-Q1 |
| ORBIMED ADVISORS LLC trimmed | 3,832,843 | $18M | 12.6% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 2,415,841 | $12M | 7.9% | 2026-Q1 |
| ACORN CAPITAL ADVISORS, LLC trimmed | 1,540,266 | $7M | 5.1% | 2026-Q1 |
| Rosalind Advisors, Inc. trimmed | 1,531,814 | $7M | 5.0% | 2026-Q1 |
| EVENTIDE ASSET MANAGEMENT, LLC added | 1,410,815 | $7M | 4.6% | 2026-Q1 |
| Deep Track Capital, LP trimmed | 1,313,137 | $6M | 4.3% | 2026-Q1 |
| MORGAN STANLEY trimmed | 1,025,318 | $5M | 3.4% | 2026-Q1 |
| SPHERA FUNDS MANAGEMENT LTD. added | 987,090 | $5M | 3.2% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 877,347 | $4M | 2.9% | 2026-Q1 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 700,000 | $3M | 2.3% | 2026-Q1 |
| DCF Advisers, LLC trimmed | 691,988 | $3M | 2.3% | 2026-Q1 |
| Boxer Capital Management, LLC trimmed | 640,000 | $3M | 2.1% | 2026-Q1 |
| DAFNA Capital Management LLC added | 498,361 | $2M | 1.6% | 2026-Q1 |
| Nan Fung Group Holdings Ltd | 460,000 | $2M | 1.5% | 2026-Q1 |
| Knott David M Jr added | 350,000 | $2M | 1.1% | 2026-Q1 |
| UBS Group AG added | 238,302 | $1M | 0.8% | 2026-Q1 |
| AdvisorShares Investments LLC added | 195,604 | $939K | 0.6% | 2026-Q1 |
| HRT FINANCIAL LP added | 187,052 | $897K | 0.6% | 2026-Q1 |
| ROYCE & ASSOCIATES LP new | 155,050 | $744K | 0.5% | 2026-Q1 |
| Pale Fire Capital SE | 153,505 | $737K | 0.5% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 147,925 | $710K | 0.5% | 2026-Q1 |
| Stonepine Capital Management, LLC trimmed | 134,060 | $643K | 0.4% | 2026-Q1 |
| Ikarian Capital, LLC | 132,153 | $634K | 0.4% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 106,349 | $510K | 0.3% | 2026-Q1 |
| PEAK6 LLC trimmed | 62,597 | $300K | 0.2% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 51,588 | $248K | 0.2% | 2026-Q1 |
| Fore Capital, LLC trimmed | 36,421 | $175K | 0.1% | 2026-Q1 |
| ROYAL BANK OF CANADA trimmed | 31,592 | $151K | 0.1% | 2026-Q1 |
| ADAR1 Capital Management, LLC trimmed | 31,278 | $150K | 0.1% | 2026-Q1 |
| PDS Planning, Inc | 30,344 | $145K | 0.1% | 2026-Q1 |
| BOOTHBAY FUND MANAGEMENT, LLC | 29,404 | $141K | 0.1% | 2026-Q1 |
| BlackRock, Inc. added | 29,126 | $140K | 0.1% | 2026-Q1 |
| AXQ CAPITAL, LP new | 29,114 | $140K | 0.1% | 2026-Q1 |
| OXFORD ASSET MANAGEMENT LLP new | 22,277 | $107K | 0.1% | 2026-Q1 |
| Point72 Asset Management, L.P. trimmed | 19,684 | $94K | 0.1% | 2026-Q1 |
| Graham Capital Management, L.P. trimmed | 18,263 | $88K | 0.1% | 2026-Q1 |
| Formidable Asset Management, LLC trimmed | 10,649 | $87K | 0.1% | 2026-Q1 |
| Jump Financial, LLC trimmed | 18,000 | $86K | 0.1% | 2026-Q1 |
| Mitsubishi UFJ Asset Management (UK) Ltd. new | 15,000 | $72K | 0.0% | 2026-Q1 |
| Tower Research Capital LLC (TRC) added | 11,873 | $57K | 0.0% | 2026-Q1 |
| Millington Financial Advisors, LLC new | 10,000 | $54K | 0.0% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC new | 10,900 | $52K | 0.0% | 2026-Q1 |
| Mayflower Financial Advisors, LLC | 10,290 | $49K | 0.0% | 2026-Q1 |
| Centiva Capital, LP new | 10,000 | $48K | 0.0% | 2026-Q1 |
| China Universal Asset Management Co., Ltd. new | 6,400 | $31K | 0.0% | 2026-Q1 |
| CITIGROUP INC added | 5,952 | $29K | 0.0% | 2026-Q1 |
| Quent Capital, LLC new | 4,453 | $21K | 0.0% | 2026-Q1 |
| NATIONAL BANK OF CANADA /FI/ trimmed | 5,132 | $17K | 0.0% | 2026-Q1 |
| GROUP ONE TRADING LLC trimmed | 3,462 | $17K | 0.0% | 2026-Q1 |
| North Star Investment Management Corp. added | 3,380 | $16K | 0.0% | 2026-Q1 |
| Federation des caisses Desjardins du Quebec | 3,121 | $15K | 0.0% | 2026-Q1 |
| OSAIC HOLDINGS, INC. added | 2,978 | $14K | 0.0% | 2026-Q1 |
| IAG Wealth Partners, LLC | 2,750 | $13K | 0.0% | 2026-Q1 |
| Advisory Services Network, LLC trimmed | 2,060 | $10K | 0.0% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 2,244 | $10K | 0.0% | 2026-Q1 |
| BARCLAYS PLC | 862 | $4K | 0.0% | 2026-Q1 |
| Ancora Advisors LLC new | 653 | $3K | 0.0% | 2026-Q1 |
| HARBOUR INVESTMENTS, INC. | 250 | $1K | 0.0% | 2026-Q1 |
| Farther Finance Advisors, LLC trimmed | 221 | $1K | 0.0% | 2026-Q1 |
| IFP Advisors, Inc | 200 | $960 | 0.0% | 2026-Q1 |
| Avalon Trust Co | 197 | $946 | 0.0% | 2026-Q1 |
| Atlantic Edge Private Wealth Management, LLC | 137 | $658 | 0.0% | 2026-Q1 |
| Tidemark, LLC | 131 | $629 | 0.0% | 2026-Q1 |
| AMERIFLEX GROUP, INC. | 131 | $629 | 0.0% | 2026-Q1 |
| TD Waterhouse Canada Inc. trimmed | 117 | $580 | 0.0% | 2026-Q1 |
| Hilton Head Capital Partners, LLC | 117 | $562 | 0.0% | 2026-Q1 |
| NVWM, LLC | 59 | $283 | 0.0% | 2026-Q1 |
| TANG CAPITAL MANAGEMENT LLC | 1,830,097 | $11M | 7.4% | 2025-Q3 stale |
| Spruce Street Capital LP new | 770,000 | $6M | 4.3% | 2025-Q4 stale |
| ArrowMark Colorado Holdings LLC new | 598,419 | $5M | 3.3% | 2025-Q4 stale |
| Squadron Capital Management LLC new | 525,000 | $4M | 2.9% | 2025-Q4 stale |
| Bollard Group LLC new | 156,954 | $1M | 0.9% | 2025-Q2 stale |
| Quadrature Capital Ltd new | 79,697 | $652K | 0.4% | 2025-Q4 stale |
| MARSHALL WACE, LLP added | 86,911 | $512K | 0.3% | 2025-Q3 stale |
| DLD Asset Management, LP new | 80,000 | $471K | 0.3% | 2025-Q3 stale |
| Walleye Capital LLC new | 53,250 | $314K | 0.2% | 2025-Q3 stale |
| MYDA Advisors LLC new | 30,000 | $245K | 0.2% | 2025-Q4 stale |
| LPL Financial LLC added | 18,125 | $148K | 0.1% | 2025-Q4 stale |
| Diametric Capital, LP added | 17,758 | $145K | 0.1% | 2025-Q4 stale |
| CREDIT AGRICOLE S A new | 15,848 | $93K | 0.1% | 2025-Q3 stale |
| PNC Financial Services Group, Inc. new | 11,010 | $90K | 0.1% | 2025-Q4 stale |
| Lewis Asset Management, LLC trimmed | 13,946 | $82K | 0.1% | 2025-Q3 stale |
| COWA, LLC | 13,200 | $78K | 0.1% | 2025-Q3 stale |
| SIMPLEX TRADING, LLC trimmed | 8,236 | $48K | 0.0% | 2025-Q3 stale |
| BANK OF AMERICA CORP /DE/ trimmed | 4,248 | $35K | 0.0% | 2025-Q4 stale |
| Global Retirement Partners, LLC trimmed | 3,100 | $25K | 0.0% | 2025-Q4 stale |
| RAYMOND JAMES FINANCIAL INC new | 1,419 | $12K | 0.0% | 2025-Q2 stale |
| Steward Partners Investment Advisory, LLC | 2,000 | $12K | 0.0% | 2025-Q3 stale |
| Crewe Advisors LLC | 956 | $8K | 0.0% | 2025-Q2 stale |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 925 | $8K | 0.0% | 2025-Q4 stale |
| Global Wealth Strategies & Associates | 526 | $4K | 0.0% | 2025-Q4 stale |
| Wealthspire Advisors, LLC new | 253 | $1K | 0.0% | 2025-Q3 stale |
| Atlantic Union Bankshares Corp new | 250 | $1K | 0.0% | 2025-Q3 stale |
| FLAGSHIP HARBOR ADVISORS, LLC new | 105 | $859 | 0.0% | 2025-Q4 stale |
| NewEdge Advisors, LLC | 95 | $777 | 0.0% | 2025-Q4 stale |
| Root Financial Partners, LLC | 65 | $532 | 0.0% | 2025-Q4 stale |
| PRINCIPAL SECURITIES, INC. | 53 | $312 | 0.0% | 2025-Q3 stale |
| SBI Securities Co., Ltd. new | 40 | $254 | 0.0% | 2025-Q1 stale |
| Larson Financial Group LLC | 21 | $172 | 0.0% | 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.