Who owns Standard BioTools (LAB)
Which tracked institutional funds hold LAB, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See LAB 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.
Conviction spread
LAB’s largest tracked holder by dollar value, Casdin Capital, LLC, sizes it at 3.7% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 3.7pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in LAB 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, we do not read how tracked institutions changed their LAB positions: many holders could not be matched across the two filings, most often because the security’s identifier changed and our mapping is incomplete, or because funds are still filing for the newer quarter. 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
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 |
|---|---|---|---|---|
| Casdin Capital, LLC | 88,783,856 | $73M | 30.2% | 2026-Q2 |
| VIKING GLOBAL INVESTORS LP | 58,651,170 | $48M | 19.9% | 2026-Q2 |
| MAK CAPITAL ONE LLC added | 28,813,904 | $24M | 9.8% | 2026-Q2 |
| Long Focus Capital Management, LLC added | 23,500,000 | $19M | 8.0% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC trimmed | 12,252,998 | $10M | 4.2% | 2026-Q2 |
| BlackRock, Inc. trimmed | 8,254,443 | $7M | 2.8% | 2026-Q2 |
| Hollow Brook Wealth Management LLC trimmed | 5,503,381 | $5M | 1.9% | 2026-Q2 |
| NEUBERGER BERMAN GROUP LLC added | 4,958,620 | $4M | 1.7% | 2026-Q2 |
| Qube Research & Technologies Ltd added | 4,820,463 | $4M | 1.6% | 2026-Q2 |
| ROYCE & ASSOCIATES LP added | 4,525,333 | $4M | 1.5% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 3,896,574 | $3M | 1.3% | 2026-Q2 |
| Tikvah Management LLC trimmed | 3,551,058 | $3M | 1.2% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC added | 3,512,665 | $3M | 1.2% | 2026-Q2 |
| MORGAN STANLEY trimmed | 2,831,668 | $2M | 1.0% | 2026-Q2 |
| D. E. Shaw & Co., Inc. added | 2,818,026 | $2M | 1.0% | 2026-Q2 |
| JANE STREET GROUP, LLC added | 2,514,299 | $2M | 0.9% | 2026-Q2 |
| Peapod Lane Capital LLC added | 2,411,474 | $2M | 0.8% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 2,348,570 | $2M | 0.8% | 2026-Q2 |
| Mink Brook Asset Management LLC new | 2,190,973 | $2M | 0.7% | 2026-Q2 |
| Sone Capital Management, LLC added | 2,133,631 | $2M | 0.7% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP new | 1,991,426 | $2M | 0.7% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO trimmed | 1,889,846 | $2M | 0.6% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 1,759,038 | $1M | 0.6% | 2026-Q2 |
| JACOBS LEVY EQUITY MANAGEMENT, INC new | 1,633,112 | $1M | 0.6% | 2026-Q2 |
| STATE STREET CORP trimmed | 1,542,478 | $1M | 0.5% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 1,359,018 | $1M | 0.5% | 2026-Q2 |
| Loews Corp new | 1,250,000 | $1M | 0.4% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC added | 992,058 | $816K | 0.3% | 2026-Q2 |
| STALEY CAPITAL ADVISERS INC added | 800,000 | $658K | 0.3% | 2026-Q2 |
| NORTHERN TRUST CORP trimmed | 791,526 | $651K | 0.3% | 2026-Q2 |
| Man Group plc new | 742,793 | $611K | 0.3% | 2026-Q2 |
| Point72 Asset Management, L.P. added | 707,991 | $582K | 0.2% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC trimmed | 674,733 | $555K | 0.2% | 2026-Q2 |
| Aster Capital Management (DIFC) Ltd added | 541,130 | $445K | 0.2% | 2026-Q2 |
| Jain Global LLC new | 467,317 | $384K | 0.2% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 434,296 | $357K | 0.1% | 2026-Q2 |
| Rockefeller Capital Management L.P. trimmed | 428,510 | $353K | 0.1% | 2026-Q2 |
| UBS Group AG added | 425,977 | $351K | 0.1% | 2026-Q2 |
| Sumitomo Mitsui Trust Group, Inc. trimmed | 412,288 | $339K | 0.1% | 2026-Q2 |
| Amova Asset Management Americas, Inc. trimmed | 412,288 | $338K | 0.1% | 2026-Q2 |
| Intellectus Partners, LLC | 404,702 | $333K | 0.1% | 2026-Q2 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 328,553 | $270K | 0.1% | 2026-Q2 |
| OPPENHEIMER & CO INC trimmed | 326,600 | $269K | 0.1% | 2026-Q2 |
| Marquette Asset Management, LLC new | 325,345 | $268K | 0.1% | 2026-Q2 |
| JOHNSON & JOHNSON | 311,967 | $257K | 0.1% | 2026-Q2 |
| Susquehanna Portfolio Strategies, LLC new | 291,513 | $240K | 0.1% | 2026-Q2 |
| XTX Topco Ltd trimmed | 277,826 | $229K | 0.1% | 2026-Q2 |
| Squarepoint Ops LLC added | 277,375 | $228K | 0.1% | 2026-Q2 |
| HSBC HOLDINGS PLC added | 271,523 | $219K | 0.1% | 2026-Q2 |
| Y-Intercept (Hong Kong) Ltd new | 263,273 | $217K | 0.1% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 244,084 | $201K | 0.1% | 2026-Q2 |
| Brevan Howard Capital Management LP new | 242,320 | $199K | 0.1% | 2026-Q2 |
| QVIDTVM Management LLC trimmed | 222,000 | $183K | 0.1% | 2026-Q2 |
| Invesco Ltd. trimmed | 221,906 | $183K | 0.1% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 216,422 | $178K | 0.1% | 2026-Q2 |
| IEQ CAPITAL, LLC added | 199,864 | $164K | 0.1% | 2026-Q2 |
| PRIMECAP MANAGEMENT CO/CA/ | 153,374 | $126K | 0.1% | 2026-Q2 |
| Vanguard Global Advisers, LLC | 129,323 | $106K | 0.0% | 2026-Q2 |
| Evercore Wealth Management, LLC | 125,000 | $103K | 0.0% | 2026-Q2 |
| Schonfeld Strategic Advisors LLC new | 118,639 | $98K | 0.0% | 2026-Q2 |
| Catalyst Funds Management Pty Ltd new | 110,795 | $91K | 0.0% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC new | 104,805 | $86K | 0.0% | 2026-Q2 |
| MERCER GLOBAL ADVISORS INC /ADV added | 101,381 | $83K | 0.0% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 98,378 | $81K | 0.0% | 2026-Q2 |
| Mariner, LLC added | 91,537 | $75K | 0.0% | 2026-Q2 |
| Bank of New York Mellon Corp trimmed | 90,282 | $74K | 0.0% | 2026-Q2 |
| Creative Planning added | 80,331 | $66K | 0.0% | 2026-Q2 |
| State of Wyoming added | 75,269 | $62K | 0.0% | 2026-Q2 |
| BOOTHBAY FUND MANAGEMENT, LLC trimmed | 70,760 | $58K | 0.0% | 2026-Q2 |
| Engineers Gate Manager LP new | 68,665 | $56K | 0.0% | 2026-Q2 |
| Hudson Bay Capital Management LP new | 64,040 | $53K | 0.0% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC added | 60,321 | $50K | 0.0% | 2026-Q2 |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO new | 51,900 | $42K | 0.0% | 2026-Q2 |
| Cerity Partners LLC added | 49,980 | $41K | 0.0% | 2026-Q2 |
| Focus Partners Wealth added | 46,565 | $38K | 0.0% | 2026-Q2 |
| BARCLAYS PLC trimmed | 43,919 | $36K | 0.0% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC added | 43,405 | $36K | 0.0% | 2026-Q2 |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC added | 42,090 | $39K | 0.0% | 2026-Q2 |
| BALYASNY ASSET MANAGEMENT L.P. trimmed | 38,535 | $32K | 0.0% | 2026-Q2 |
| NEEDHAM INVESTMENT MANAGEMENT LLC | 34,435 | $28K | 0.0% | 2026-Q2 |
| Atom Investors LP new | 29,576 | $24K | 0.0% | 2026-Q2 |
| CAPTRUST FINANCIAL ADVISORS added | 28,742 | $24K | 0.0% | 2026-Q2 |
| EverSource Wealth Advisors, LLC added | 27,810 | $23K | 0.0% | 2026-Q2 |
| ExodusPoint Capital Management, LP trimmed | 26,867 | $22K | 0.0% | 2026-Q2 |
| Platform Technology Partners | 25,000 | $21K | 0.0% | 2026-Q2 |
| Corient Private Wealth LP added | 24,740 | $20K | 0.0% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 24,039 | $20K | 0.0% | 2026-Q2 |
| CITIGROUP INC trimmed | 23,402 | $19K | 0.0% | 2026-Q2 |
| BRIGHTON JONES LLC new | 21,944 | $18K | 0.0% | 2026-Q2 |
| Laurion Capital Management LP new | 21,821 | $18K | 0.0% | 2026-Q2 |
| Connor, Clark & Lunn Investment Management Ltd. new | 20,809 | $17K | 0.0% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 18,851 | $15K | 0.0% | 2026-Q2 |
| Jefferies Financial Group Inc. new | 17,675 | $15K | 0.0% | 2026-Q2 |
| Merit Financial Group, LLC added | 14,544 | $12K | 0.0% | 2026-Q2 |
| ALLSTATE CORP added | 14,234 | $12K | 0.0% | 2026-Q2 |
| Tower Research Capital LLC (TRC) trimmed | 14,153 | $12K | 0.0% | 2026-Q2 |
| LPL Financial LLC added | 12,553 | $10K | 0.0% | 2026-Q2 |
| Evolution Wealth Advisors, LLC | 12,210 | $10K | 0.0% | 2026-Q2 |
| CIBC Asset Management Inc trimmed | 12,062 | $10K | 0.0% | 2026-Q2 |
| Arax Advisory Partners added | 11,709 | $10K | 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.