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Institutional Ownership · SEC Form 13F

Who owns XFOR (XFOR)


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

84
Institutional holders
93,905,537
Shares held (tracked funds)

How the tape is positioned

26 tracked funds added or opened XFOR while 9 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

XFOR’s largest tracked holder by dollar value, MORGAN STANLEY, 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 conviction gap — its largest holder concentrates the name more heavily than the typical one.

Book-share is each fund’s reported value in XFOR 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 84 tracked filers holding XFOR, 40 increased or opened the position and 36 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 XFOR 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 4

  • VANGUARD CAPITAL MANAGEMENT LLC$14M
  • VANGUARD FIDUCIARY TRUST CO$2M
  • Venrock Adviser, LLC$1M
  • Brevan Howard Capital Management LP$526K

Full exits 5

  • VANGUARD GROUP INC$14M
  • Siren, L.L.C.$6M
  • Point72 Asset Management, L.P.$3M
  • SILVERARC CAPITAL MANAGEMENT, LLC$1M
  • CITADEL ADVISORS LLC$515K

Largest adds

  • MORGAN STANLEY$6M
  • Deep Track Capital, LP$6M
  • MILLENNIUM MANAGEMENT LLC$5M
  • Saturn V Capital Management LP$3M
  • SUSQUEHANNA INTERNATIONAL GROUP, LLP$3M
  • Rosalind Advisors, Inc.$3M

Largest trims

  • Stonepine Capital Management, LLC$989K
  • FMR LLC$529K
  • SAMSARA BIOCAPITAL, LLC$272K
  • ExodusPoint Capital Management, LP$256K

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
MORGAN STANLEY added9,466,992$39M9.3%2026-Q1
Empery Asset Management, LP trimmed8,944,118$37M8.8%2026-Q1
FMR LLC trimmed8,103,400$33M7.9%2026-Q1
Bain Capital Life Sciences Investors, LLC7,967,454$33M7.8%2026-Q1
PERCEPTIVE ADVISORS LLC added6,737,648$28M6.6%2026-Q1
Saturn V Capital Management LP added6,456,646$27M6.3%2026-Q1
Deep Track Capital, LP added6,339,535$26M6.2%2026-Q1
Kalehua Capital Management LLC3,722,840$15M3.7%2026-Q1
VANGUARD CAPITAL MANAGEMENT LLC new3,497,612$14M3.4%2026-Q1
BRAIDWELL LP trimmed3,272,954$14M3.2%2026-Q1
NEA Management Company, LLC3,233,743$13M3.2%2026-Q1
Rosalind Advisors, Inc. added3,214,766$13M3.2%2026-Q1
Blackstone Inc.2,681,922$11M2.6%2026-Q1
Trails Edge Capital Partners, LP2,571,478$11M2.5%2026-Q1
Nantahala Capital Management, LLC2,449,468$10M2.4%2026-Q1
BVF INC/IL2,233,742$9M2.2%2026-Q1
SAMSARA BIOCAPITAL, LLC trimmed1,832,566$8M1.8%2026-Q1
BlackRock, Inc. trimmed1,211,794$5M1.2%2026-Q1
MILLENNIUM MANAGEMENT LLC added1,210,514$5M1.2%2026-Q1
Woodline Partners LP added1,001,095$4M1.0%2026-Q1
GEODE CAPITAL MANAGEMENT, LLC trimmed939,726$4M0.9%2026-Q1
GOLDMAN SACHS GROUP INC added882,134$4M0.9%2026-Q1
SUSQUEHANNA INTERNATIONAL GROUP, LLP added856,222$4M0.8%2026-Q1
STEMPOINT CAPITAL LP trimmed850,742$4M0.8%2026-Q1
VANGUARD FIDUCIARY TRUST CO new480,733$2M0.5%2026-Q1
STATE STREET CORP added403,534$2M0.4%2026-Q1
MARSHALL WACE, LLP added336,834$1M0.3%2026-Q1
Stonepine Capital Management, LLC trimmed335,309$1M0.3%2026-Q1
Venrock Adviser, LLC new330,525$1M0.3%2026-Q1
UBS Group AG added267,340$1M0.3%2026-Q1
ACORN CAPITAL ADVISORS, LLC trimmed234,039$967K0.2%2026-Q1
Qube Research & Technologies Ltd added218,954$904K0.2%2026-Q1
NORTHERN TRUST CORP178,235$736K0.2%2026-Q1
Pale Fire Capital SE167,590$692K0.2%2026-Q1
BANK OF AMERICA CORP /DE/ added150,676$622K0.1%2026-Q1
Affinity Asset Advisors, LLC145,000$599K0.1%2026-Q1
Palumbo Wealth Management LLC added131,014$541K0.1%2026-Q1
Brevan Howard Capital Management LP new127,321$526K0.1%2026-Q1
Susquehanna Portfolio Strategies, LLC added102,599$424K0.1%2026-Q1
Dynamic Technology Lab Private Ltd new36,221$385K0.1%2026-Q1
CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed66,749$276K0.1%2026-Q1
OMERS ADMINISTRATION Corp trimmed57,300$237K0.1%2026-Q1
Hudson Bay Capital Management LP added50,287$208K0.0%2026-Q1
Catalyst Funds Management Pty Ltd new47,383$196K0.0%2026-Q1
JANE STREET GROUP, LLC trimmed37,143$153K0.0%2026-Q1
CITIGROUP INC added35,765$148K0.0%2026-Q1
Vanguard Global Advisers, LLC new32,977$136K0.0%2026-Q1
Diametric Capital, LP trimmed28,973$120K0.0%2026-Q1
STIFEL FINANCIAL CORP added21,789$90K0.0%2026-Q1
Invesco Ltd. trimmed19,968$82K0.0%2026-Q1
Schonfeld Strategic Advisors LLC added19,514$81K0.0%2026-Q1
Jefferies Financial Group Inc. trimmed19,474$80K0.0%2026-Q1
CAXTON CORP15,557$64K0.0%2026-Q1
ExodusPoint Capital Management, LP trimmed14,703$61K0.0%2026-Q1
TWO SIGMA INVESTMENTS, LP trimmed13,868$57K0.0%2026-Q1
Creative Planning trimmed13,819$57K0.0%2026-Q1
Virtu Financial LLC trimmed12,730$53K0.0%2026-Q1
Jump Financial, LLC added12,317$51K0.0%2026-Q1
QUADRANT CAPITAL GROUP LLC new128$49K0.0%2026-Q1
Vanguard Personalized Indexing Management, LLC trimmed11,525$48K0.0%2026-Q1
SummitTX Capital, L.P. new11,200$46K0.0%2026-Q1
WINTON GROUP Ltd new10,600$44K0.0%2026-Q1
Indivisible Partners10,000$37K0.0%2026-Q1
BNP PARIBAS FINANCIAL MARKETS added4,756$20K0.0%2026-Q1
BARCLAYS PLC trimmed2,814$12K0.0%2026-Q1
VANGUARD GROUP INC added3,423,662$14M3.3%2025-Q4 stale
Siren, L.L.C. new1,500,000$6M1.4%2025-Q4 stale
Point72 Asset Management, L.P. added808,154$3M0.8%2025-Q4 stale
KINGDON CAPITAL MANAGEMENT, L.L.C. added933,332$3M0.8%2025-Q3 stale
ORBIMED ADVISORS LLC trimmed6,776,515$2M0.4%2025-Q1 stale
SILVERARC CAPITAL MANAGEMENT, LLC new357,387$1M0.3%2025-Q4 stale
BOOTHBAY FUND MANAGEMENT, LLC added343,963$1M0.3%2025-Q3 stale
Ensign Peak Advisors, Inc trimmed2,235,655$529K0.1%2025-Q1 stale
CITADEL ADVISORS LLC added128,675$515K0.1%2025-Q4 stale
Balyasny Asset Management L.P. new64,505$258K0.1%2025-Q4 stale
GSA CAPITAL PARTNERS LLP trimmed132,724$252K0.1%2025-Q2 stale
CIBC WORLD MARKET INC. new35,000$248K0.1%2025-Q1 stale
AXA S.A. trimmed691,116$163K0.0%2025-Q1 stale
Man Group plc new24,187$97K0.0%2025-Q4 stale
Lighthouse Investment Partners, LLC trimmed22,200$89K0.0%2025-Q4 stale
Bank of New York Mellon Corp344,747$81K0.0%2025-Q1 stale
RENAISSANCE TECHNOLOGIES LLC added19,177$66K0.0%2025-Q3 stale
DEUTSCHE BANK AG\267,628$64K0.0%2025-Q1 stale
AQR CAPITAL MANAGEMENT LLC trimmed26,382$50K0.0%2025-Q2 stale
Squarepoint Ops LLC trimmed12,518$50K0.0%2025-Q4 stale
RHUMBLINE ADVISERS added188,415$44K0.0%2025-Q1 stale
SIMPLEX TRADING, LLC trimmed111,704$26K0.0%2025-Q1 stale
ALLIANCEBERNSTEIN L.P.109,570$26K0.0%2025-Q1 stale
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added100,693$24K0.0%2025-Q1 stale
SG Americas Securities, LLC trimmed91,487$22K0.0%2025-Q1 stale
HRT FINANCIAL LP trimmed10,548$20K0.0%2025-Q2 stale
PRICE T ROWE ASSOCIATES INC /MD/ added83,015$20K0.0%2025-Q1 stale
Corebridge Financial, Inc. added83,602$20K0.0%2025-Q1 stale
VOYA INVESTMENT MANAGEMENT LLC added59,322$14K0.0%2025-Q1 stale
INTECH INVESTMENT MANAGEMENT LLC new57,960$14K0.0%2025-Q1 stale
XTX Topco Ltd trimmed57,803$14K0.0%2025-Q1 stale
NEW YORK STATE COMMON RETIREMENT FUND51,639$12K0.0%2025-Q1 stale
NEUBERGER BERMAN GROUP LLC new44,667$11K0.0%2025-Q1 stale
Point72 Asia (Singapore) Pte. Ltd. new2,914$10K0.0%2025-Q3 stale
CANTOR FITZGERALD, L. P.40,251$10K0.0%2025-Q1 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