Who owns Champions Oncology (CSBR)
Which tracked institutional funds hold CSBR, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See CSBR company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 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 CSBR is one-sided between 2026-Q1 and 2026-Q2: 3 added or opened and 0 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
CSBR’s largest tracked holder by dollar value, BATTERY MANAGEMENT CORP., sizes it at 4.1% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 4.1pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in CSBR 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 2026-Q1 and 2026-Q2, across 24 tracked filers holding CSBR, 8 increased or opened the position and 11 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 CSBR between the 2026-Q1 and 2026-Q2 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.
Largest adds
- BANK OF AMERICA CORP /DE/$1M
- BATTERY MANAGEMENT CORP.$993K
- NEA Management Company, LLC$703K
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 |
|---|---|---|---|---|
| BATTERY MANAGEMENT CORP. | 2,421,673 | $15M | 40.0% | 2026-Q2 |
| NEA Management Company, LLC | 1,713,720 | $11M | 28.3% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 301,353 | $2M | 5.0% | 2026-Q2 |
| TOCQUEVILLE ASSET MANAGEMENT L.P. trimmed | 295,658 | $2M | 4.9% | 2026-Q2 |
| MORGAN STANLEY trimmed | 235,400 | $1M | 3.9% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 214,058 | $1M | 3.5% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 139,039 | $856K | 2.3% | 2026-Q2 |
| BlackRock, Inc. added | 129,848 | $800K | 2.1% | 2026-Q2 |
| Mink Brook Asset Management LLC | 111,338 | $686K | 1.8% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 76,300 | $470K | 1.3% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 33,239 | $205K | 0.5% | 2026-Q2 |
| NORTHERN TRUST CORP trimmed | 27,910 | $172K | 0.5% | 2026-Q2 |
| STATE STREET CORP | 26,203 | $161K | 0.4% | 2026-Q2 |
| Bank of New York Mellon Corp | 21,614 | $133K | 0.4% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 18,295 | $113K | 0.3% | 2026-Q2 |
| ESSEX INVESTMENT MANAGEMENT CO LLC trimmed | 18,221 | $112K | 0.3% | 2026-Q2 |
| Mesirow Financial Investment Management, Inc. | 15,800 | $97K | 0.3% | 2026-Q2 |
| MERCER GLOBAL ADVISORS INC /ADV new | 12,775 | $79K | 0.2% | 2026-Q2 |
| Vanguard Global Advisers, LLC | 2,093 | $13K | 0.0% | 2026-Q2 |
| BARCLAYS PLC new | 13 | $80 | 0.0% | 2026-Q2 |
| JPMORGAN CHASE & CO | 11 | $71 | 0.0% | 2026-Q2 |
| Cassaday & Co Wealth Management LLC | 10 | $62 | 0.0% | 2026-Q2 |
| SBI Securities Co., Ltd. | 4 | $25 | 0.0% | 2026-Q2 |
| FMR LLC new | 1 | $5 | 0.0% | 2026-Q2 |
| HighTower Advisors, LLC | 35,158 | $202K | 0.5% | 2026-Q1 stale (1 quarter behind) |
| DIMENSIONAL FUND ADVISORS LP trimmed | 23,973 | $138K | 0.4% | 2026-Q1 stale (1 quarter behind) |
| ACADIAN ASSET MANAGEMENT LLC trimmed | 21,323 | $121K | 0.3% | 2026-Q1 stale (1 quarter behind) |
| Cambridge Investment Research Advisors, Inc. | 12,252 | $70K | 0.2% | 2026-Q1 stale (1 quarter behind) |
| Capital Advisors, Ltd. LLC | 48 | — | 0.0% | 2026-Q1 stale (1 quarter behind) |
| GSA CAPITAL PARTNERS LLP added | 20,978 | $145K | 0.4% | 2025-Q4 stale (2 quarters behind) |
| O'SHAUGHNESSY ASSET MANAGEMENT, LLC trimmed | 13,031 | $90K | 0.2% | 2025-Q4 stale (2 quarters behind) |
| MILLENNIUM MANAGEMENT LLC trimmed | 10,203 | $71K | 0.2% | 2025-Q4 stale (2 quarters behind) |
| WHITTIER TRUST CO | 800 | $5K | 0.0% | 2025-Q4 stale (2 quarters behind) |
| UBS Group AG trimmed | 190 | $1K | 0.0% | 2025-Q4 stale (2 quarters behind) |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 19,811 | $128K | 0.3% | 2025-Q3 stale (3 quarters behind) |
| ROYAL BANK OF CANADA trimmed | 6,614 | $43K | 0.1% | 2025-Q3 stale (3 quarters behind) |
| Hillsdale Investment Management Inc. trimmed | 25,100 | $185K | 0.5% | 2025-Q2 stale (4 quarters behind) |
| JANE STREET GROUP, LLC trimmed | 17,667 | $130K | 0.3% | 2025-Q2 stale (4 quarters behind) |
| XTX Topco Ltd new | 14,034 | $103K | 0.3% | 2025-Q2 stale (4 quarters behind) |
| LAZARD ASSET MANAGEMENT LLC new | 1,349 | $9K | 0.0% | 2025-Q2 stale (4 quarters behind) |
| Garde Capital, Inc. | 1 | $8 | 0.0% | 2025-Q2 stale (4 quarters behind) |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 0 | — | 0.0% | 2025-Q2 stale (4 quarters behind) |
1 parent filing withheld from the table above, and from the coverage figures, to avoid listing one book twice: VANGUARD GROUP INC (last filed 2025-Q4, 334,605 shares) reconciles to its 3 current affiliates (336,685 shares) — 0.622% apart.
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.