Who owns Standard BioTools Inc. (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-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 LAB is one-sided between 2025-Q4 and 2026-Q1: 9 added or opened and 29 trimmed or exited — on balance reducing.
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
LAB’s largest tracked holder by dollar value, Casdin Capital, LLC, sizes it at 6.2% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 6.2pp 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 2025-Q4 and 2026-Q1, across 155 tracked filers holding LAB, 76 increased or opened the position and 74 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 LAB 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 6
- VANGUARD CAPITAL MANAGEMENT LLC$12M
- VANGUARD PORTFOLIO MANAGEMENT LLC$2M
- Peapod Lane Capital LLC$2M
- VANGUARD FIDUCIARY TRUST CO$2M
- Sone Capital Management, LLC$2M
- STALEY CAPITAL ADVISERS INC$581K
Full exits 6
- VANGUARD GROUP INC$22M
- ARK Investment Management LLC$4M
- Nan Fung Group Holdings Ltd$2M
- JANE STREET GROUP, LLC$985K
- LANDSCAPE CAPITAL MANAGEMENT, L.L.C.$792K
- Pacific Capital Partners Ltd$608K
Largest adds
- Qube Research & Technologies Ltd$370K
- AQR CAPITAL MANAGEMENT LLC$304K
- GSA CAPITAL PARTNERS LLP$264K
Largest trims
- Casdin Capital, LLC$32M
- VIKING GLOBAL INVESTORS LP$21M
- BlackRock, Inc.$10M
- MORGAN STANLEY$7M
- Sumitomo Mitsui Trust Group, Inc.$5M
- Amova Asset Management Americas, Inc.$5M
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 |
|---|---|---|---|---|
| Casdin Capital, LLC | 88,783,856 | $82M | 26.2% | 2026-Q1 |
| VIKING GLOBAL INVESTORS LP | 58,651,170 | $54M | 17.3% | 2026-Q1 |
| MAK CAPITAL ONE LLC added | 26,172,626 | $24M | 7.7% | 2026-Q1 |
| BlackRock, Inc. trimmed | 24,756,084 | $23M | 7.3% | 2026-Q1 |
| Long Focus Capital Management, LLC added | 16,015,721 | $15M | 4.7% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 12,816,070 | $12M | 3.8% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 7,289,336 | $7M | 2.1% | 2026-Q1 |
| STATE STREET CORP added | 6,556,509 | $6M | 1.9% | 2026-Q1 |
| Hollow Brook Wealth Management LLC added | 5,653,381 | $5M | 1.7% | 2026-Q1 |
| NEUBERGER BERMAN GROUP LLC added | 4,657,585 | $4M | 1.4% | 2026-Q1 |
| Tikvah Management LLC | 3,551,152 | $3M | 1.0% | 2026-Q1 |
| ROYCE & ASSOCIATES LP added | 3,005,529 | $3M | 0.9% | 2026-Q1 |
| MORGAN STANLEY trimmed | 2,887,146 | $3M | 0.9% | 2026-Q1 |
| BARCLAYS PLC trimmed | 2,617,969 | $2M | 0.8% | 2026-Q1 |
| NORTHERN TRUST CORP added | 2,454,235 | $2M | 0.7% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 2,414,699 | $2M | 0.7% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 2,394,400 | $2M | 0.7% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 2,102,015 | $2M | 0.6% | 2026-Q1 |
| Peapod Lane Capital LLC new | 2,028,527 | $2M | 0.6% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 1,917,437 | $2M | 0.6% | 2026-Q1 |
| Sone Capital Management, LLC new | 1,766,781 | $2M | 0.5% | 2026-Q1 |
| Slate Path Capital LP | 1,615,000 | $1M | 0.5% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 1,225,310 | $1M | 0.4% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 943,185 | $867K | 0.3% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 914,523 | $841K | 0.3% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 766,953 | $705K | 0.2% | 2026-Q1 |
| Qube Research & Technologies Ltd added | 704,407 | $648K | 0.2% | 2026-Q1 |
| Nuveen, LLC added | 661,204 | $608K | 0.2% | 2026-Q1 |
| STALEY CAPITAL ADVISERS INC new | 632,392 | $581K | 0.2% | 2026-Q1 |
| Rockefeller Capital Management L.P. added | 527,408 | $485K | 0.2% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 519,783 | $478K | 0.2% | 2026-Q1 |
| Swiss National Bank | 489,660 | $450K | 0.1% | 2026-Q1 |
| Amova Asset Management Americas, Inc. trimmed | 442,784 | $407K | 0.1% | 2026-Q1 |
| Sumitomo Mitsui Trust Group, Inc. trimmed | 442,784 | $407K | 0.1% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. | 315,690 | $404K | 0.1% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 420,565 | $386K | 0.1% | 2026-Q1 |
| Intellectus Partners, LLC | 404,702 | $372K | 0.1% | 2026-Q1 |
| RHUMBLINE ADVISERS trimmed | 364,889 | $335K | 0.1% | 2026-Q1 |
| GSA CAPITAL PARTNERS LLP added | 353,471 | $325K | 0.1% | 2026-Q1 |
| OPPENHEIMER & CO INC added | 350,890 | $323K | 0.1% | 2026-Q1 |
| XTX Topco Ltd added | 328,929 | $302K | 0.1% | 2026-Q1 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 314,120 | $289K | 0.1% | 2026-Q1 |
| JOHNSON & JOHNSON | 311,967 | $287K | 0.1% | 2026-Q1 |
| UBS Group AG added | 305,122 | $280K | 0.1% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 285,775 | $263K | 0.1% | 2026-Q1 |
| Invesco Ltd. added | 258,344 | $237K | 0.1% | 2026-Q1 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 235,923 | $217K | 0.1% | 2026-Q1 |
| QVIDTVM Management LLC | 229,338 | $211K | 0.1% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 202,466 | $187K | 0.1% | 2026-Q1 |
| D. E. Shaw & Co., Inc. added | 199,084 | $183K | 0.1% | 2026-Q1 |
| Legal & General Group Plc trimmed | 159,541 | $147K | 0.0% | 2026-Q1 |
| PRIMECAP MANAGEMENT CO/CA/ | 153,374 | $141K | 0.0% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 153,343 | $141K | 0.0% | 2026-Q1 |
| STATE OF WISCONSIN INVESTMENT BOARD trimmed | 144,626 | $133K | 0.0% | 2026-Q1 |
| Front Street Capital Management, Inc. added | 141,231 | $130K | 0.0% | 2026-Q1 |
| JANUS HENDERSON GROUP PLC | 131,610 | $121K | 0.0% | 2026-Q1 |
| VANGUARD ASSET MANAGEMENT, Ltd new | 131,258 | $121K | 0.0% | 2026-Q1 |
| Vanguard Global Advisers, LLC new | 129,323 | $119K | 0.0% | 2026-Q1 |
| Evercore Wealth Management, LLC | 125,000 | $115K | 0.0% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN trimmed | 118,752 | $109K | 0.0% | 2026-Q1 |
| IEQ CAPITAL, LLC added | 118,550 | $109K | 0.0% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 117,886 | $109K | 0.0% | 2026-Q1 |
| Quadrature Capital Ltd added | 114,899 | $106K | 0.0% | 2026-Q1 |
| MetLife Investment Management, LLC trimmed | 86,220 | $79K | 0.0% | 2026-Q1 |
| Police & Firemen's Retirement System of New Jersey | 85,970 | $79K | 0.0% | 2026-Q1 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE trimmed | 81,553 | $75K | 0.0% | 2026-Q1 |
| NEW YORK STATE COMMON RETIREMENT FUND | 79,000 | $73K | 0.0% | 2026-Q1 |
| BOOTHBAY FUND MANAGEMENT, LLC added | 72,608 | $67K | 0.0% | 2026-Q1 |
| HRT FINANCIAL LP trimmed | 70,522 | $64K | 0.0% | 2026-Q1 |
| ARIZONA STATE RETIREMENT SYSTEM trimmed | 68,201 | $63K | 0.0% | 2026-Q1 |
| INTECH INVESTMENT MANAGEMENT LLC trimmed | 63,430 | $58K | 0.0% | 2026-Q1 |
| MERCER GLOBAL ADVISORS INC /ADV added | 62,777 | $58K | 0.0% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 61,181 | $56K | 0.0% | 2026-Q1 |
| SEI INVESTMENTS CO trimmed | 60,090 | $55K | 0.0% | 2026-Q1 |
| VOYA INVESTMENT MANAGEMENT LLC trimmed | 56,336 | $52K | 0.0% | 2026-Q1 |
| HighTower Advisors, LLC added | 54,491 | $50K | 0.0% | 2026-Q1 |
| VANGUARD GROUP INC added | 17,297,599 | $22M | 7.1% | 2025-Q4 stale |
| MIRABELLA FINANCIAL SERVICES LLP added | 3,434,387 | $4M | 1.3% | 2025-Q2 stale |
| ARK Investment Management LLC added | 3,066,665 | $4M | 1.3% | 2025-Q4 stale |
| Nan Fung Group Holdings Ltd | 1,883,179 | $2M | 0.8% | 2025-Q4 stale |
| Kent Lake PR LLC trimmed | 1,000,000 | $1M | 0.4% | 2025-Q2 stale |
| JBF Capital, Inc. new | 770,654 | $1M | 0.3% | 2025-Q3 stale |
| JANE STREET GROUP, LLC added | 769,231 | $985K | 0.3% | 2025-Q4 stale |
| LANDSCAPE CAPITAL MANAGEMENT, L.L.C. new | 619,129 | $792K | 0.3% | 2025-Q4 stale |
| Pacific Capital Partners Ltd trimmed | 475,000 | $608K | 0.2% | 2025-Q4 stale |
| TANG CAPITAL MANAGEMENT LLC | 407,755 | $530K | 0.2% | 2025-Q3 stale |
| GM Advisory Group, LLC added | 300,000 | $390K | 0.1% | 2025-Q3 stale |
| Impact Partnership Wealth, LLC added | 192,830 | $247K | 0.1% | 2025-Q4 stale |
| Bradley & Co. Private Wealth Management, LLC | 179,364 | $194K | 0.1% | 2025-Q1 stale |
| Corebridge Financial, Inc. trimmed | 144,511 | $156K | 0.1% | 2025-Q1 stale |
| IQ EQ FUND MANAGEMENT (IRELAND) Ltd added | 108,416 | $139K | 0.0% | 2025-Q4 stale |
| Abich Financial Wealth Management LLC new | 91,448 | $119K | 0.0% | 2025-Q3 stale |
| BALYASNY ASSET MANAGEMENT L.P. | 86,005 | $112K | 0.0% | 2025-Q3 stale |
| DIMENSIONAL FUND ADVISORS LP trimmed | 97,175 | $105K | 0.0% | 2025-Q1 stale |
| WEXFORD CAPITAL LP | 83,638 | $100K | 0.0% | 2025-Q2 stale |
| Point72 Asia (Singapore) Pte. Ltd. trimmed | 71,690 | $86K | 0.0% | 2025-Q2 stale |
| Schoolcraft Capital LLC | 74,224 | $80K | 0.0% | 2025-Q1 stale |
| Virtu Financial LLC added | 62,129 | $80K | 0.0% | 2025-Q4 stale |
| HSBC HOLDINGS PLC trimmed | 45,685 | $59K | 0.0% | 2025-Q3 stale |
| Squarepoint Ops LLC trimmed | 43,253 | $52K | 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.