Who owns Pacific Biosciences of California (PACB)
Which tracked institutional funds hold PACB, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See PACB 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 PACB is one-sided between 2026-Q1 and 2026-Q2: 35 added or opened and 10 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
PACB’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 gap the other way — the median holder sizes PACB more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in PACB 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 214 tracked filers holding PACB, 88 increased or opened the position and 116 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
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 PACB 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 4
- Longaeva Partners L.P.$4M
- Numerai GP LLC$1M
- Man Group plc$1M
- Connor, Clark & Lunn Investment Management Ltd.$585K
Full exits 3
- HRT FINANCIAL LP$2M
- PANAGORA ASSET MANAGEMENT INC$664K
- ACADIAN ASSET MANAGEMENT LLC$549K
Largest adds
- BlackRock, Inc.$21M
- Point72 Asset Management, L.P.$8M
- SOFTBANK GROUP CORP.$7M
- VANGUARD CAPITAL MANAGEMENT LLC$6M
- GOLDMAN SACHS GROUP INC$4M
- GEODE CAPITAL MANAGEMENT, LLC$4M
Largest trims
- Nuveen, LLC$2M
- JANE STREET GROUP, LLC$2M
- RENAISSANCE TECHNOLOGIES LLC$2M
- MORGAN STANLEY$2M
- Qube Research & Technologies Ltd$1M
- UBS Group AG$664K
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 32,339,550 | $54M | 17.1% | 2026-Q2 |
| ARK Investment Management LLC trimmed | 29,781,416 | $50M | 15.8% | 2026-Q2 |
| SOFTBANK GROUP CORP. | 20,451,570 | $34M | 10.8% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 13,397,934 | $23M | 7.1% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 7,606,518 | $13M | 4.0% | 2026-Q2 |
| Sumitomo Mitsui Trust Group, Inc. trimmed | 6,009,715 | $10M | 3.2% | 2026-Q2 |
| Amova Asset Management Americas, Inc. trimmed | 6,009,715 | $10M | 3.2% | 2026-Q2 |
| STATE STREET CORP trimmed | 5,961,175 | $10M | 3.2% | 2026-Q2 |
| Point72 Asset Management, L.P. added | 4,787,300 | $8M | 2.5% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 4,242,599 | $7M | 2.2% | 2026-Q2 |
| D. E. Shaw & Co., Inc. added | 4,208,146 | $7M | 2.2% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC trimmed | 3,962,442 | $7M | 2.1% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 3,229,887 | $5M | 1.7% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 2,845,903 | $5M | 1.5% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC trimmed | 2,671,916 | $4M | 1.4% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 2,652,298 | $4M | 1.4% | 2026-Q2 |
| NORTHERN TRUST CORP added | 2,352,786 | $4M | 1.2% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 2,187,627 | $4M | 1.2% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 2,129,263 | $4M | 1.1% | 2026-Q2 |
| Longaeva Partners L.P. new | 2,118,231 | $4M | 1.1% | 2026-Q2 |
| IQ EQ FUND MANAGEMENT (IRELAND) Ltd trimmed | 1,694,546 | $3M | 0.9% | 2026-Q2 |
| Birchview Capital, LP trimmed | 1,350,000 | $2M | 0.7% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 1,348,131 | $2M | 0.7% | 2026-Q2 |
| Invesco Ltd. trimmed | 1,297,091 | $2M | 0.7% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 1,296,684 | $2M | 0.7% | 2026-Q2 |
| Nuveen, LLC trimmed | 1,023,113 | $2M | 0.5% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 966,200 | $2M | 0.5% | 2026-Q2 |
| BOURNE LENT ASSET MANAGEMENT INC trimmed | 943,055 | $2M | 0.5% | 2026-Q2 |
| HHLR ADVISORS, LTD. | 918,892 | $2M | 0.5% | 2026-Q2 |
| UBS Group AG trimmed | 893,140 | $2M | 0.5% | 2026-Q2 |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 808,700 | $1M | 0.4% | 2026-Q2 |
| Bank of New York Mellon Corp trimmed | 767,567 | $1M | 0.4% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 759,783 | $1M | 0.4% | 2026-Q2 |
| Casdin Capital, LLC | 723,767 | $1M | 0.4% | 2026-Q2 |
| TUDOR INVESTMENT CORP ET AL | 684,707 | $1M | 0.4% | 2026-Q2 |
| XTX Topco Ltd added | 638,882 | $1M | 0.3% | 2026-Q2 |
| Numerai GP LLC new | 621,469 | $1M | 0.3% | 2026-Q2 |
| CARRET ASSET MANAGEMENT, LLC added | 600,140 | $1M | 0.3% | 2026-Q2 |
| Man Group plc added | 597,334 | $1M | 0.3% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 596,843 | $1M | 0.3% | 2026-Q2 |
| BALYASNY ASSET MANAGEMENT L.P. added | 564,339 | $948K | 0.3% | 2026-Q2 |
| PEAK6 LLC trimmed | 555,552 | $933K | 0.3% | 2026-Q2 |
| Vestmark Advisory Solutions, Inc. trimmed | 478,205 | $803K | 0.3% | 2026-Q2 |
| MORGAN STANLEY trimmed | 477,776 | $803K | 0.3% | 2026-Q2 |
| ArrowMark Colorado Holdings LLC | 468,382 | $787K | 0.2% | 2026-Q2 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 441,639 | $742K | 0.2% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. | 387,060 | $511K | 0.2% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 356,996 | $600K | 0.2% | 2026-Q2 |
| Connor, Clark & Lunn Investment Management Ltd. new | 348,324 | $585K | 0.2% | 2026-Q2 |
| Mirador Capital Partners LP trimmed | 342,482 | $575K | 0.2% | 2026-Q2 |
| LPL Financial LLC added | 337,502 | $567K | 0.2% | 2026-Q2 |
| Creative Planning trimmed | 322,990 | $543K | 0.2% | 2026-Q2 |
| Qube Research & Technologies Ltd trimmed | 297,951 | $501K | 0.2% | 2026-Q2 |
| GROUP ONE TRADING LLC trimmed | 290,860 | $489K | 0.2% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 283,099 | $476K | 0.2% | 2026-Q2 |
| HSBC HOLDINGS PLC added | 280,306 | $463K | 0.1% | 2026-Q2 |
| BARCLAYS PLC added | 276,988 | $465K | 0.1% | 2026-Q2 |
| WATER ISLAND CAPITAL LLC added | 273,666 | $460K | 0.1% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 267,386 | $449K | 0.1% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 231,783 | $390K | 0.1% | 2026-Q2 |
| Quadrature Capital Ltd added | 185,654 | $312K | 0.1% | 2026-Q2 |
| Green Alpha Advisors, LLC trimmed | 178,655 | $300K | 0.1% | 2026-Q2 |
| OSAIC HOLDINGS, INC. added | 164,522 | $276K | 0.1% | 2026-Q2 |
| MARSHALL WACE, LLP added | 163,642 | $275K | 0.1% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC trimmed | 159,749 | $268K | 0.1% | 2026-Q2 |
| MetLife Investment Management, LLC added | 157,198 | $264K | 0.1% | 2026-Q2 |
| AdvisorNet Financial, Inc added | 152,122 | $256K | 0.1% | 2026-Q2 |
| Main Street Research LLC | 152,100 | $256K | 0.1% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 145,948 | $252K | 0.1% | 2026-Q2 |
| CITIGROUP INC added | 139,424 | $234K | 0.1% | 2026-Q2 |
| Voleon Capital Management LP new | 134,834 | $227K | 0.1% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC trimmed | 132,926 | $223K | 0.1% | 2026-Q2 |
| IEQ CAPITAL, LLC added | 123,782 | $208K | 0.1% | 2026-Q2 |
| Vanguard Global Advisers, LLC | 121,781 | $205K | 0.1% | 2026-Q2 |
| Koa Wealth Management, LLC | 120,000 | $202K | 0.1% | 2026-Q2 |
| BENJAMIN EDWARDS INC trimmed | 107,715 | $181K | 0.1% | 2026-Q2 |
| KAVAR CAPITAL PARTNERS GROUP, LLC added | 103,319 | $174K | 0.1% | 2026-Q2 |
| Bridgewater Associates, LP new | 102,761 | $173K | 0.1% | 2026-Q2 |
| GABELLI FUNDS LLC | 100,000 | $168K | 0.1% | 2026-Q2 |
| Cerity Partners LLC added | 98,511 | $165K | 0.1% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND | 84,825 | $143K | 0.0% | 2026-Q2 |
| Police & Firemen's Retirement System of New Jersey | 79,955 | $134K | 0.0% | 2026-Q2 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE added | 75,341 | $127K | 0.0% | 2026-Q2 |
| HUB Investment Partners, LLC added | 75,000 | $126K | 0.0% | 2026-Q2 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM | 71,941 | $121K | 0.0% | 2026-Q2 |
| HARTLINE INVESTMENT CORP/ | 69,000 | $116K | 0.0% | 2026-Q2 |
| STIFEL FINANCIAL CORP trimmed | 68,249 | $115K | 0.0% | 2026-Q2 |
| INTECH INVESTMENT MANAGEMENT LLC trimmed | 67,410 | $113K | 0.0% | 2026-Q2 |
| SIMPLEX TRADING, LLC trimmed | 65,659 | $110K | 0.0% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 59,230 | $100K | 0.0% | 2026-Q2 |
| VOYA INVESTMENT MANAGEMENT LLC added | 57,145 | $96K | 0.0% | 2026-Q2 |
| CAPTRUST FINANCIAL ADVISORS added | 56,461 | $95K | 0.0% | 2026-Q2 |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC added | 54,981 | $86K | 0.0% | 2026-Q2 |
| Cetera Investment Advisers added | 54,663 | $92K | 0.0% | 2026-Q2 |
| State of Wyoming trimmed | 54,267 | $91K | 0.0% | 2026-Q2 |
| MERCER GLOBAL ADVISORS INC /ADV added | 51,769 | $87K | 0.0% | 2026-Q2 |
| Abacus Planning Group, Inc. | 51,238 | $86K | 0.0% | 2026-Q2 |
| Evolution Wealth Advisors, LLC | 50,000 | $84K | 0.0% | 2026-Q2 |
| China Universal Asset Management Co., Ltd. trimmed | 49,432 | $83K | 0.0% | 2026-Q2 |
| Wealth Architects, LLC | 48,725 | $82K | 0.0% | 2026-Q2 |
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.