Who owns CNTX (CNTX)
Which tracked institutional funds hold CNTX, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See CNTX 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 CNTX is one-sided between 2025-Q4 and 2026-Q1: 26 added or opened and 5 trimmed or exited — on balance accumulating.
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
CNTX’s largest tracked holder by dollar value, MPM BIOIMPACT LLC, sizes it at 2.2% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 2.2pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in CNTX 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 59 tracked filers holding CNTX, 35 increased or opened the position and 21 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 CNTX 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 12
- Soleus Capital Management, L.P.$18M
- Octagon Capital Advisors LP$14M
- VANGUARD CAPITAL MANAGEMENT LLC$9M
- TCG Crossover Management, LLC$7M
- Squadron Capital Management LLC$3M
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$3M
Full exits 3
- VANGUARD GROUP INC$6M
- Blackstone Inc.$4M
- Alyeska Investment Group, L.P.$2M
Largest adds
- MPM BIOIMPACT LLC$12M
- Nextech Invest, Ltd.$9M
- Deep Track Capital, LP$9M
- FRANKLIN RESOURCES INC$4M
- MARSHALL WACE, LLP$4M
- Avidity Partners Management LP$4M
Largest trims
- GREAT POINT PARTNERS LLC$1M
- RENAISSANCE TECHNOLOGIES LLC$268K
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 |
|---|---|---|---|---|
| MPM BIOIMPACT LLC | 10,679,391 | $28M | 13.5% | 2026-Q1 |
| Deep Track Capital, LP | 7,419,355 | $19M | 9.4% | 2026-Q1 |
| Nextech Invest, Ltd. | 7,419,355 | $19M | 9.4% | 2026-Q1 |
| Soleus Capital Management, L.P. new | 6,963,141 | $18M | 8.8% | 2026-Q1 |
| Octagon Capital Advisors LP new | 5,250,000 | $14M | 6.6% | 2026-Q1 |
| Blue Owl Capital Holdings LP trimmed | 5,089,015 | $13M | 6.4% | 2026-Q1 |
| Avidity Partners Management LP trimmed | 4,998,267 | $12M | 5.7% | 2026-Q1 |
| FRANKLIN RESOURCES INC trimmed | 3,803,338 | $10M | 4.8% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 3,431,953 | $9M | 4.3% | 2026-Q1 |
| MARSHALL WACE, LLP added | 2,948,441 | $8M | 3.7% | 2026-Q1 |
| TCG Crossover Management, LLC new | 2,682,696 | $7M | 3.4% | 2026-Q1 |
| GREAT POINT PARTNERS LLC trimmed | 2,238,496 | $6M | 2.8% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 1,424,374 | $4M | 1.8% | 2026-Q1 |
| Squadron Capital Management LLC new | 1,100,000 | $3M | 1.4% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 1,093,894 | $3M | 1.4% | 2026-Q1 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. new | 1,000,000 | $3M | 1.3% | 2026-Q1 |
| Sio Capital Management, LLC trimmed | 917,922 | $2M | 1.2% | 2026-Q1 |
| BlackRock, Inc. trimmed | 846,696 | $2M | 1.1% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 603,767 | $2M | 0.8% | 2026-Q1 |
| Cormorant Asset Management, LP new | 529,550 | $1M | 0.7% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 436,931 | $1M | 0.6% | 2026-Q1 |
| ADAR1 Capital Management, LLC | 351,094 | $920K | 0.4% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 341,344 | $894K | 0.4% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC new | 287,299 | $753K | 0.4% | 2026-Q1 |
| Woodline Partners LP trimmed | 250,088 | $655K | 0.3% | 2026-Q1 |
| STATE STREET CORP added | 233,507 | $612K | 0.3% | 2026-Q1 |
| Seven Fleet Capital Management LP new | 190,785 | $500K | 0.2% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 182,999 | $479K | 0.2% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 140,017 | $367K | 0.2% | 2026-Q1 |
| HighTower Advisors, LLC added | 126,152 | $331K | 0.2% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 114,888 | $301K | 0.1% | 2026-Q1 |
| Pathstone Holdings, LLC | 110,244 | $289K | 0.1% | 2026-Q1 |
| HRT FINANCIAL LP added | 104,973 | $275K | 0.1% | 2026-Q1 |
| Mill Creek Capital Advisors, LLC | 104,631 | $274K | 0.1% | 2026-Q1 |
| NORTHERN TRUST CORP added | 103,256 | $271K | 0.1% | 2026-Q1 |
| Velan Capital Investment Management LP | 100,000 | $262K | 0.1% | 2026-Q1 |
| Clear Harbor Asset Management, LLC | 92,804 | $243K | 0.1% | 2026-Q1 |
| WINTON GROUP Ltd new | 81,303 | $213K | 0.1% | 2026-Q1 |
| OMERS ADMINISTRATION Corp new | 80,600 | $211K | 0.1% | 2026-Q1 |
| Point72 Asset Management, L.P. added | 57,231 | $150K | 0.1% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC new | 50,912 | $133K | 0.1% | 2026-Q1 |
| Corient Private Wealth LLC added | 26,534 | $70K | 0.0% | 2026-Q1 |
| Virtu Financial LLC trimmed | 23,100 | $61K | 0.0% | 2026-Q1 |
| Cerity Partners LLC | 20,000 | $52K | 0.0% | 2026-Q1 |
| Sanctuary Advisors, LLC new | 19,316 | $51K | 0.0% | 2026-Q1 |
| Vanguard Global Advisers, LLC new | 12,612 | $33K | 0.0% | 2026-Q1 |
| TWO SIGMA SECURITIES, LLC trimmed | 12,573 | $33K | 0.0% | 2026-Q1 |
| CITIGROUP INC added | 12,182 | $32K | 0.0% | 2026-Q1 |
| Qube Research & Technologies Ltd trimmed | 11,398 | $30K | 0.0% | 2026-Q1 |
| OSAIC HOLDINGS, INC. trimmed | 10,500 | $28K | 0.0% | 2026-Q1 |
| Legacy Capital Wealth Partners, LLC new | 10,315 | $27K | 0.0% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 10,422 | $26K | 0.0% | 2026-Q1 |
| MORGAN STANLEY added | 9,077 | $24K | 0.0% | 2026-Q1 |
| UBS Group AG added | 6,188 | $16K | 0.0% | 2026-Q1 |
| FNY Investment Advisers, LLC new | 6,000 | $15K | 0.0% | 2026-Q1 |
| Strive Financial Group ,LLC | 1,700 | $4K | 0.0% | 2026-Q1 |
| Farther Finance Advisors, LLC | 1,500 | $4K | 0.0% | 2026-Q1 |
| Tower Research Capital LLC (TRC) trimmed | 1,232 | $3K | 0.0% | 2026-Q1 |
| SBI Securities Co., Ltd. trimmed | 78 | $204 | 0.0% | 2026-Q1 |
| VANGUARD GROUP INC added | 3,785,909 | $6M | 2.7% | 2025-Q4 stale |
| Blackstone Inc. | 2,440,330 | $4M | 1.7% | 2025-Q4 stale |
| Alyeska Investment Group, L.P. | 1,663,355 | $2M | 1.2% | 2025-Q4 stale |
| Ally Bridge Group (NY) LLC trimmed | 1,157,448 | $708K | 0.3% | 2025-Q1 stale |
| Allostery Investments LP | 950,166 | $582K | 0.3% | 2025-Q1 stale |
| Affinity Asset Advisors, LLC trimmed | 402,653 | $390K | 0.2% | 2025-Q3 stale |
| LUMINUS MANAGEMENT LLC new | 328,222 | $215K | 0.1% | 2025-Q2 stale |
| Walleye Capital LLC | 132,786 | $195K | 0.1% | 2025-Q4 stale |
| XTX Topco Ltd added | 101,605 | $149K | 0.1% | 2025-Q4 stale |
| Shay Capital LLC added | 189,853 | $116K | 0.1% | 2025-Q1 stale |
| Quadrature Capital Ltd new | 46,220 | $68K | 0.0% | 2025-Q4 stale |
| Nantahala Capital Management, LLC trimmed | 37,837 | $56K | 0.0% | 2025-Q4 stale |
| GTS SECURITIES LLC new | 44,176 | $29K | 0.0% | 2025-Q2 stale |
| CAXTON CORP | 18,403 | $27K | 0.0% | 2025-Q4 stale |
| LANDSCAPE CAPITAL MANAGEMENT, L.L.C. trimmed | 41,216 | $25K | 0.0% | 2025-Q1 stale |
| CW Advisors, LLC | 15,000 | $10K | 0.0% | 2025-Q2 stale |
| Newbridge Financial Services Group, Inc. new | 2,000 | $1K | 0.0% | 2025-Q2 stale |
| BARCLAYS PLC new | 167 | $162 | 0.0% | 2025-Q3 stale |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 0 | — | 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.