Skip to main content Skip to main content
Institutional Ownership · SEC Form 13F

Who owns AMLX (AMLX)


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

171
Institutional holders
113,296,563
Shares held (tracked funds)

How the tape is positioned

59 tracked funds added or opened AMLX while 31 trimmed or exited it between 2025-Q4 and 2026-Q1 — 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

AMLX’s largest tracked holder by dollar value, FMR LLC, 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 AMLX more heavily than its largest holder by dollar value does.

Book-share is each fund’s reported value in AMLX 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 171 tracked filers holding AMLX, 89 increased or opened the position and 92 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.

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 AMLX 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 9

  • VANGUARD CAPITAL MANAGEMENT LLC$58M
  • Jones Hill Capital LP$22M
  • Siren, L.L.C.$17M
  • VANGUARD PORTFOLIO MANAGEMENT LLC$13M
  • VANGUARD FIDUCIARY TRUST CO$8M
  • iA Global Asset Management Inc.$4M

Full exits 17

  • VANGUARD GROUP INC$62M
  • Sofinnova Investments, Inc.$6M
  • SILVERARC CAPITAL MANAGEMENT, LLC$6M
  • AMERIPRISE FINANCIAL INC$6M
  • Patient Square Capital LP$4M
  • TWO SIGMA ADVISERS, LP$4M

Largest adds

  • FMR LLC$21M
  • FRANKLIN RESOURCES INC$17M
  • ADAGE CAPITAL PARTNERS GP, L.L.C.$16M
  • JANUS HENDERSON GROUP PLC$15M
  • PERCEPTIVE ADVISORS LLC$15M
  • BlackRock, Inc.$13M

Largest trims

  • Nantahala Capital Management, LLC$3M
  • Point72 Asset Management, L.P.$3M
  • UBS Group AG$2M
  • ACUTA CAPITAL PARTNERS, LLC$2M
  • TWO SIGMA INVESTMENTS, LP$2M
  • Alpha Wave Global, LP$2M

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
FMR LLC trimmed15,862,576$220M12.7%2026-Q1
BlackRock, Inc. trimmed8,828,836$123M7.1%2026-Q1
PERCEPTIVE ADVISORS LLC8,284,882$115M6.6%2026-Q1
TCG Crossover Management, LLC6,243,812$87M5.0%2026-Q1
Commodore Capital LP5,650,000$79M4.5%2026-Q1
JANUS HENDERSON GROUP PLC added4,986,073$69M4.0%2026-Q1
Saturn V Capital Management LP trimmed4,349,885$60M3.5%2026-Q1
VANGUARD CAPITAL MANAGEMENT LLC new4,141,575$58M3.3%2026-Q1
ADAGE CAPITAL PARTNERS GP, L.L.C. added3,560,764$49M2.9%2026-Q1
First Light Asset Management, LLC trimmed3,190,645$44M2.6%2026-Q1
Driehaus Capital Management LLC trimmed2,987,147$42M2.4%2026-Q1
GOLDMAN SACHS GROUP INC added2,625,991$37M2.1%2026-Q1
STATE STREET CORP added2,363,161$33M1.9%2026-Q1
FRANKLIN RESOURCES INC added2,261,569$31M1.8%2026-Q1
GEODE CAPITAL MANAGEMENT, LLC added2,210,932$31M1.8%2026-Q1
MORGAN STANLEY trimmed2,175,547$30M1.7%2026-Q1
Almitas Capital LLC2,122,597$30M1.7%2026-Q1
GREAT POINT PARTNERS LLC1,750,000$24M1.4%2026-Q1
Jones Hill Capital LP new1,598,794$22M1.3%2026-Q1
683 Capital Management, LLC trimmed1,530,000$21M1.2%2026-Q1
EVENTIDE ASSET MANAGEMENT, LLC added1,513,958$21M1.2%2026-Q1
BANK OF AMERICA CORP /DE/ trimmed1,330,689$18M1.1%2026-Q1
DEUTSCHE BANK AG\ trimmed1,267,785$18M1.0%2026-Q1
Siren, L.L.C. new1,230,000$17M1.0%2026-Q1
BALYASNY ASSET MANAGEMENT L.P. added1,107,271$15M0.9%2026-Q1
ADAR1 Capital Management, LLC added1,000,604$14M0.8%2026-Q1
BARCLAYS PLC added971,854$14M0.8%2026-Q1
VANGUARD PORTFOLIO MANAGEMENT LLC new944,781$13M0.8%2026-Q1
DIMENSIONAL FUND ADVISORS LP added903,192$13M0.7%2026-Q1
Connor, Clark & Lunn Investment Management Ltd. trimmed868,325$12M0.7%2026-Q1
Woodline Partners LP added845,800$12M0.7%2026-Q1
Boxer Capital Management, LLC800,000$11M0.6%2026-Q1
NORTHERN TRUST CORP trimmed779,908$11M0.6%2026-Q1
CHARLES SCHWAB INVESTMENT MANAGEMENT INC added716,225$10M0.6%2026-Q1
Qube Research & Technologies Ltd added702,236$10M0.6%2026-Q1
Logos Global Management LP trimmed700,000$10M0.6%2026-Q1
STEMPOINT CAPITAL LP added669,685$9M0.5%2026-Q1
Parkman Healthcare Partners LLC added621,458$9M0.5%2026-Q1
JUPITER ASSET MANAGEMENT LTD added592,654$8M0.5%2026-Q1
VANGUARD FIDUCIARY TRUST CO new586,152$8M0.5%2026-Q1
Nantahala Capital Management, LLC trimmed535,684$7M0.4%2026-Q1
Rock Springs Capital Management LP499,764$7M0.4%2026-Q1
CITADEL ADVISORS LLC added411,532$6M0.3%2026-Q1
FEDERATED HERMES, INC. trimmed363,546$5M0.3%2026-Q1
HighVista Strategies LLC added352,085$5M0.3%2026-Q1
Cormorant Asset Management, LP trimmed350,000$5M0.3%2026-Q1
UBS Group AG trimmed324,319$5M0.3%2026-Q1
Tetragon Partners GP Ltd added317,877$4M0.3%2026-Q1
iA Global Asset Management Inc. new304,786$4M0.2%2026-Q1
Nuveen, LLC trimmed264,897$4M0.2%2026-Q1
Bank of New York Mellon Corp added251,104$3M0.2%2026-Q1
SummitTX Capital, L.P. added227,010$3M0.2%2026-Q1
Aldebaran Capital, LLC trimmed197,892$3M0.2%2026-Q1
Invesco Ltd. trimmed171,620$2M0.1%2026-Q1
TWO SIGMA INVESTMENTS, LP trimmed161,945$2M0.1%2026-Q1
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added157,089$2M0.1%2026-Q1
WELLINGTON MANAGEMENT GROUP LLP trimmed156,128$2M0.1%2026-Q1
ACUTA CAPITAL PARTNERS, LLC trimmed151,067$2M0.1%2026-Q1
JPMORGAN CHASE & CO added159,663$2M0.1%2026-Q1
PFM Health Sciences, LP added145,275$2M0.1%2026-Q1
Alpha Wave Global, LP trimmed142,336$2M0.1%2026-Q1
Swiss National Bank trimmed130,300$2M0.1%2026-Q1
PRICE T ROWE ASSOCIATES INC /MD/ added121,439$2M0.1%2026-Q1
Squarepoint Ops LLC added114,877$2M0.1%2026-Q1
Elmind Capital, LP112,000$2M0.1%2026-Q1
RHUMBLINE ADVISERS added108,467$2M0.1%2026-Q1
Point72 Asset Management, L.P. trimmed106,535$1M0.1%2026-Q1
ALPS ADVISORS INC trimmed89,983$1M0.1%2026-Q1
SEI INVESTMENTS CO added85,279$1M0.1%2026-Q1
Schonfeld Strategic Advisors LLC added77,794$1M0.1%2026-Q1
WELLS FARGO & COMPANY/MN trimmed75,083$1M0.1%2026-Q1
D. E. Shaw & Co., Inc. added74,230$1M0.1%2026-Q1
STATE OF WISCONSIN INVESTMENT BOARD trimmed72,061$1M0.1%2026-Q1
VANGUARD GROUP INC trimmed5,106,289$62M3.6%2025-Q4 stale
Paradigm Biocapital Advisors LP new1,900,000$26M1.5%2025-Q3 stale
ORBIMED ADVISORS LLC added750,600$10M0.6%2025-Q3 stale
BRAIDWELL LP new612,841$8M0.5%2025-Q3 stale
JENNISON ASSOCIATES LLC new578,659$8M0.5%2025-Q3 stale
Sofinnova Investments, Inc. added527,099$6M0.4%2025-Q4 stale
SILVERARC CAPITAL MANAGEMENT, LLC trimmed506,242$6M0.4%2025-Q4 stale
AMERIPRISE FINANCIAL INC added502,366$6M0.3%2025-Q4 stale
Ally Bridge Group (NY) LLC added437,391$6M0.3%2025-Q3 stale
Aberdeen Group plc trimmed738,657$5M0.3%2025-Q2 stale
Patient Square Capital LP added350,000$4M0.2%2025-Q4 stale
TWO SIGMA ADVISERS, LP added328,401$4M0.2%2025-Q4 stale
JANE STREET GROUP, LLC added263,235$3M0.2%2025-Q4 stale
ACADIAN ASSET MANAGEMENT LLC trimmed254,328$3M0.2%2025-Q4 stale
Longaeva Partners L.P. new200,000$3M0.2%2025-Q3 stale
Alyeska Investment Group, L.P. trimmed750,412$3M0.2%2025-Q1 stale
RENAISSANCE TECHNOLOGIES LLC added192,500$2M0.1%2025-Q4 stale
XTX Topco Ltd added189,673$2M0.1%2025-Q4 stale
FRED ALGER MANAGEMENT, LLC added164,042$2M0.1%2025-Q3 stale
VOLORIDGE INVESTMENT MANAGEMENT, LLC trimmed153,363$2M0.1%2025-Q4 stale
Atom Investors LP trimmed139,422$2M0.1%2025-Q4 stale
BANK OF MONTREAL /CAN/ trimmed138,525$2M0.1%2025-Q4 stale
J. Goldman & Co LP added258,600$2M0.1%2025-Q2 stale
Y-Intercept (Hong Kong) Ltd added240,379$2M0.1%2025-Q2 stale
DIADEMA PARTNERS LP new100,000$1M0.1%2025-Q3 stale
TANG CAPITAL MANAGEMENT LLC100,000$1M0.1%2025-Q3 stale
DARK FOREST CAPITAL MANAGEMENT LP trimmed86,795$1M0.1%2025-Q3 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.

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