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Institutional Ownership · SEC Form 13F

Who owns Zura Bio (ZURA)


Which tracked institutional funds hold ZURA, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See ZURA 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.

95
Institutional holders
73M
Shares held (tracked funds)
99.0%
Of shares outstanding

How the tape is positioned

23 tracked funds added or opened ZURA while 18 trimmed or exited it between 2026-Q1 and 2026-Q2 — 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

ZURA’s largest tracked holder by dollar value, MONTANOVA CAPITAL, LLC, sizes it at 1.2% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 1.2pp conviction gap — its largest holder concentrates the name more heavily than the typical one.

Book-share is each fund’s reported value in ZURA 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 95 tracked filers holding ZURA, 60 increased or opened the position and 43 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 ZURA 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.

New buyers 5

  • MPM BIOIMPACT LLC$26M
  • VANGUARD PORTFOLIO MANAGEMENT LLC$2M
  • AMERIPRISE FINANCIAL INC$2M
  • Nuveen, LLC$745K
  • Bank of New York Mellon Corp$734K

Full exits 9

  • Cormorant Asset Management, LP$9M
  • Point72 Asset Management, L.P.$5M
  • MARSHALL WACE, LLP$5M
  • SILVERARC CAPITAL MANAGEMENT, LLC$3M
  • Qube Research & Technologies Ltd$3M
  • JANE STREET GROUP, LLC$2M

Largest adds

  • BlackRock, Inc.$19M
  • Saturn V Capital Management LP$8M
  • ADAR1 Capital Management, LLC$7M
  • GEODE CAPITAL MANAGEMENT, LLC$6M
  • STATE STREET CORP$5M
  • Vestal Point Capital, LP$4M

Largest trims

  • Pfizer Inc$14M
  • MILLENNIUM MANAGEMENT LLC$8M
  • Affinity Asset Advisors, LLC$7M
  • MORGAN STANLEY$2M
  • JPMORGAN CHASE & CO$809K
  • WELLINGTON MANAGEMENT GROUP LLP$465K

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).

FundSharesReported value% of valueQuarter
MONTANOVA CAPITAL, LLC added9,443,001$56M12.3%2026-Q2
Venrock Adviser, LLC6,434,990$38M8.4%2026-Q2
MPM BIOIMPACT LLC new4,472,843$26M5.8%2026-Q2
GREAT POINT PARTNERS LLC4,215,930$25M5.5%2026-Q2
JPMORGAN CHASE & CO trimmed4,354,715$25M5.4%2026-Q2
BRAIDWELL LP trimmed3,980,295$23M5.2%2026-Q2
Siren, L.L.C.3,734,866$22M4.9%2026-Q2
BlackRock, Inc. added3,614,695$21M4.7%2026-Q2
Commodore Capital LP3,250,000$19M4.2%2026-Q2
ADAGE CAPITAL PARTNERS GP, L.L.C.2,750,000$16M3.6%2026-Q2
Saturn V Capital Management LP added2,101,119$12M2.7%2026-Q2
QVT Financial LP added1,895,153$11M2.5%2026-Q2
ADAR1 Capital Management, LLC added1,759,295$10M2.3%2026-Q2
ARMISTICE CAPITAL, LLC added1,636,000$10M2.1%2026-Q2
GEODE CAPITAL MANAGEMENT, LLC added1,584,209$9M2.1%2026-Q2
Affinity Asset Advisors, LLC trimmed1,464,303$9M1.9%2026-Q2
STEMPOINT CAPITAL LP added1,368,215$8M1.8%2026-Q2
Ikarian Capital, LLC added1,218,492$7M1.6%2026-Q2
EcoR1 Capital, LLC1,179,715$7M1.5%2026-Q2
Vestal Point Capital, LP added1,173,956$7M1.5%2026-Q2
STATE STREET CORP added1,001,637$6M1.3%2026-Q2
Boxer Capital Management, LLC900,000$5M1.2%2026-Q2
VANGUARD CAPITAL MANAGEMENT LLC added747,352$4M1.0%2026-Q2
GOLDMAN SACHS GROUP INC added573,946$3M0.7%2026-Q2
FMR LLC trimmed528,284$3M0.7%2026-Q2
MORGAN STANLEY trimmed505,953$3M0.7%2026-Q2
NORTHERN TRUST CORP added500,086$3M0.6%2026-Q2
Pfizer Inc trimmed538,841$3M0.6%2026-Q2
Foresite Capital Management VI LLC450,000$3M0.6%2026-Q2
VANGUARD PORTFOLIO MANAGEMENT LLC new407,532$2M0.5%2026-Q2
VANGUARD FIDUCIARY TRUST CO added406,450$2M0.5%2026-Q2
BOOTHBAY FUND MANAGEMENT, LLC added379,177$2M0.5%2026-Q2
KVP Capital Advisors, LP373,128$2M0.5%2026-Q2
TWO SIGMA INVESTMENTS, LP added350,902$2M0.5%2026-Q2
RENAISSANCE TECHNOLOGIES LLC added321,702$2M0.4%2026-Q2
CITADEL ADVISORS LLC added300,719$2M0.4%2026-Q2
AMERIPRISE FINANCIAL INC trimmed282,207$2M0.4%2026-Q2
UBS Group AG added265,314$2M0.3%2026-Q2
Jump Financial, LLC added231,600$1M0.3%2026-Q2
CHARLES SCHWAB INVESTMENT MANAGEMENT INC added174,395$1M0.2%2026-Q2
MILLENNIUM MANAGEMENT LLC trimmed137,639$812K0.2%2026-Q2
XTX Topco Ltd added136,224$804K0.2%2026-Q2
Alberta Investment Management Corp133,200$786K0.2%2026-Q2
Nuveen, LLC added126,204$745K0.2%2026-Q2
Bank of New York Mellon Corp added124,365$734K0.2%2026-Q2
BARCLAYS PLC trimmed105,746$624K0.1%2026-Q2
BANK OF AMERICA CORP /DE/ trimmed97,033$572K0.1%2026-Q2
ALPS ADVISORS INC added96,414$569K0.1%2026-Q2
BRIDGEWAY CAPITAL MANAGEMENT, LLC85,348$504K0.1%2026-Q2
Verdad Advisers, LP trimmed66,919$395K0.1%2026-Q2
RHUMBLINE ADVISERS added65,888$389K0.1%2026-Q2
BNP PARIBAS FINANCIAL MARKETS added59,437$351K0.1%2026-Q2
DEUTSCHE BANK AG\ added58,648$346K0.1%2026-Q2
RBF Capital, LLC58,193$343K0.1%2026-Q2
DIMENSIONAL FUND ADVISORS LP added55,129$325K0.1%2026-Q2
WELLS FARGO & COMPANY/MN added53,776$317K0.1%2026-Q2
PRICE T ROWE ASSOCIATES INC /MD/ added48,385$286K0.1%2026-Q2
AMERICAN CENTURY COMPANIES INC added40,461$239K0.1%2026-Q2
WELLINGTON MANAGEMENT GROUP LLP trimmed38,800$229K0.1%2026-Q2
MetLife Investment Management, LLC added36,749$217K0.0%2026-Q2
Invesco Ltd. new32,029$189K0.0%2026-Q2
ALLIANCEBERNSTEIN L.P. added31,740$189K0.0%2026-Q2
RAYMOND JAMES FINANCIAL INC added28,820$170K0.0%2026-Q2
EntryPoint Capital, LLC new28,806$170K0.0%2026-Q2
CITIGROUP INC added27,763$164K0.0%2026-Q2
Squarepoint Ops LLC trimmed27,164$160K0.0%2026-Q2
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. trimmed27,030$159K0.0%2026-Q2
Forefront Analytics, LLC added26,968$159K0.0%2026-Q2
Mariner, LLC trimmed23,102$136K0.0%2026-Q2
INSIGNEO ADVISORY SERVICES, LLC trimmed20,650$122K0.0%2026-Q2
Police & Firemen's Retirement System of New Jersey added17,387$103K0.0%2026-Q2
MANUFACTURERS LIFE INSURANCE COMPANY, THE trimmed17,042$101K0.0%2026-Q2
LOS ANGELES CAPITAL MANAGEMENT LLC new16,916$100K0.0%2026-Q2
Vanguard Global Advisers, LLC16,821$99K0.0%2026-Q2
China Universal Asset Management Co., Ltd. trimmed16,000$94K0.0%2026-Q2
Abel Hall, LLC added13,229$78K0.0%2026-Q2
NEW YORK STATE COMMON RETIREMENT FUND added13,200$78K0.0%2026-Q2
VOYA INVESTMENT MANAGEMENT LLC trimmed11,616$69K0.0%2026-Q2
State of Wyoming added9,878$58K0.0%2026-Q2
Allworth Financial LP trimmed5,788$34K0.0%2026-Q2
Legal & General Group Plc added5,726$34K0.0%2026-Q2
Ameritas Investment Partners, Inc. added5,350$32K0.0%2026-Q2
Russell Investments Group, Ltd. new4,714$28K0.0%2026-Q2
Tower Research Capital LLC (TRC) trimmed3,383$20K0.0%2026-Q2
ROYAL BANK OF CANADA added2,819$17K0.0%2026-Q2
SIMPLEX TRADING, LLC trimmed2,640$16K0.0%2026-Q2
Steward Partners Investment Advisory, LLC1,000$6K0.0%2026-Q2
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed812$5K0.0%2026-Q2
NISA INVESTMENT ADVISORS, LLC702$4K0.0%2026-Q2
Quarry LP new323$2K0.0%2026-Q2
US BANCORP \DE\318$2K0.0%2026-Q2
Sterling Capital Management LLC added207$1K0.0%2026-Q2
SBI Securities Co., Ltd. trimmed77$4540.0%2026-Q2
Caitong International Asset Management Co., Ltd added50$2950.0%2026-Q2
Arax Advisory Partners24$1420.0%2026-Q2
Cormorant Asset Management, LP new1,450,000$9M1.9%2026-Q1 stale (1 quarter behind)
Point72 Asset Management, L.P. added872,662$5M1.1%2026-Q1 stale (1 quarter behind)
MARSHALL WACE, LLP trimmed844,404$5M1.1%2026-Q1 stale (1 quarter behind)
SILVERARC CAPITAL MANAGEMENT, LLC trimmed560,651$3M0.7%2026-Q1 stale (1 quarter behind)
VANGUARD GROUP INC added568,118$3M0.7%2025-Q4 stale (2 quarters behind)

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.

HoldersTotal shares

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.

Learn how to read institutional ownership