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XFOR · X4 Pharmaceuticals, Inc · Shareholders & Ownership

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$3.25 +0.00 (+0.00%) At close · Oct 27 Q1 2025 earnings call transcript
Market Cap
$316.77M
Shares
99.15M
Volume · Oct 27 1.61M Avg daily vol (3M) 853.45K

Every disclosed holder of XFOR in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

Who Owns XFOR

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

No chart: the summed disclosures exceed shares outstanding, so they are not parts of one whole.

Holder group Shares % Out
Institutional (13F) 99,148,465 100.00%
Insiders (Forms 3, 4, 5) 0 0.00%
13D/G-only blocks 17,351,912 17.50%
Remaining 17,353,634 -17.50%
Registered funds (N-PORT, not summed) 22,203,259 22.39%

Shares outstanding: 99,146,743, the issuer's latest cover-page count restated onto today's split basis.

Insiders are listed but not summed: the issuer has more than one class of common stock and Forms 3, 4 and 5 report one issuer-wide balance across them.

Remaining is negative: the summed disclosures exceed shares outstanding, as when filings are dated at different times or holders that do not disclose their links count the same shares. It is flagged, not clipped.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of XFOR

# Holder Shares
1
MORGAN STANLEY
13F CIK 895421 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
9,461,279
1.1
Inception Portfolio
Fund S000002825 · Registered fund · Jun 30, 2026
MORGAN STANLEY INSTITUTIONAL FUND INC, not summed
2,308,518
2
Bain Capital Life Sciences Investors, LLC
13F CIK 1703031 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
7,967,454
3
PERCEPTIVE ADVISORS LLC
13F CIK 1224962 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
7,933,491
3.1
PERCEPTIVE ADVISORS LLC
13G CIK 1224962 · Registered investment adviser · Jun 30, 2026
Rule 13d-1(c), passive investor, not summed
8,085,006
4
Saturn V Capital Management LP
13F CIK 1964437 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
6,973,343
5
Empery Asset Management, LP
13F CIK 1469336 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
6,930,591
6
Deep Track Capital, LP
13F CIK 1856083 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
5,878,757
6.1
Deep Track Capital, LP
13G CIK 1856083 · Investment adviser · Jun 30, 2026
Rule 13d-1(c), passive investor, not summed
8,040,894
7
Venrock Healthcare Capital Partners III, L.P.
13G CIK 1738048 · Unknown · Sep 14, 2026
Rule 13d-1(c), passive investor
5,555,047
8
BlackRock, Inc.
13F CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
5,554,906
8.1
BlackRock, Inc.
13G CIK 2012383 · Holding company · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
5,529,573
8.2
iShares Russell 2000 ETF
Fund S000004344 · Registered fund · Jun 30, 2026
iShares Trust, not summed
1,907,416
8.3
iShares Russell 2000 Value ETF
Fund S000004342 · Registered fund · Jun 30, 2026
iShares Trust, not summed
758,220
8.4
iShares Micro-Cap ETF
Fund S000004439 · Registered fund · Jun 30, 2026
iShares Trust, not summed
271,214
8.5
Master Small Cap Index Series
Fund S000002716 · Registered fund · Jun 30, 2026
Quantitative Master Series LLC, not summed
151,139
9
Growth Equity Opportunities 18 VGE, LLC
13D CIK 1917895 · Unknown · Oct 27, 2025
Item 4 purpose: Passive investment
5,057,610
10
FMR LLC
13G CIK 315066 · Holding company · Sep 30, 2026
Rule 13d-1(b), qualified institution, not summed
4,558,616
10.1
FMR LLC
13F CIK 315066 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
8,321,657
10.2
Fidelity Small Cap Growth Fund
Fund S000007193 · Registered fund · Jul 31, 2026
Fidelity Securities Fund, not summed
3,386,200
10.3
Fidelity Small Cap Growth K6 Fund
Fund S000057285 · Registered fund · Jul 31, 2026
Fidelity Securities Fund, not summed
1,689,700
10.4
Select Biotechnology Portfolio
Fund S000007486 · Registered fund · Aug 31, 2026
Fidelity Select Portfolios, not summed
1,428,500
10.5
Fidelity Advisor Biotechnology Fund
Fund S000005321 · Registered fund · Jul 31, 2026
Fidelity Advisor Series VII, not summed
1,341,800
11
Kalehua Capital Management LLC
13F CIK 2106181 · Exempt reporting adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
3,722,840
12
VANGUARD CAPITAL MANAGEMENT LLC
13F CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
3,715,859
13
BIOTECHNOLOGY VALUE FUND L P
13G CIK 918923 · Unknown · Dec 31, 2025
Rule 13d-1(c), passive investor
3,411,993
14
NEA Management Company, LLC
13F CIK 1512848 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
3,233,743
15
Rosalind Advisors, Inc.
13F CIK 1622627 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
3,214,766
16
BRAIDWELL LP
13F CIK 1920938 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
2,922,754
17
Blackstone Inc.
13F CIK 1393818 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
2,681,922
18
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
2,599,387
19
Trails Edge Capital Partners, LP
13F CIK 2077247 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
2,571,478
20
Coastlands Capital LP
13G CIK 2068530 · Investment adviser · Oct 3, 2025
Rule 13d-1(b), qualified institution
2,491,638
21
Nantahala Capital Management, LLC
13F CIK 1472322 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
2,449,468
22
BVF INC/IL
13F CIK 1056807 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
2,233,742
23
GEODE CAPITAL MANAGEMENT, LLC
13F CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
2,098,047
24
Venrock Adviser, LLC
13F CIK 1615982 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,934,253
25
EQ/Morgan Stanley Small Cap Growth Portfolio
Fund S000044689 · Registered fund · Jun 30, 2026
EQ Advisors Trust, not summed
1,817,124
26
SAMSARA BIOCAPITAL, LLC
13F CIK 1744967 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,395,587
27
STATE STREET CORP
13F CIK 93751 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
1,296,017
27.1
STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO
Fund S000050332 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
29,000
27.2
State Street Total Return V.I.S. Fund
Fund S000001637 · Registered fund · Jun 30, 2026
STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
2,041
27.3
State Street Balanced Index Fund
Fund S000082802 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
1,031
28
VANGUARD EXTENDED MARKET INDEX FUND
Fund S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
1,032,028
29
Woodline Partners LP
13F CIK 1784547 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,001,095
30
GOLDMAN SACHS GROUP INC
13F CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
916,536
31
NORTHERN TRUST CORP
13F CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
652,849
31.1
Small Cap Index Fund
Fund S000001245 · Registered fund · Jun 30, 2026
Northern Funds, not summed
41,980
32
Anders Hove
13G CIK 1766853 · Unknown · Dec 31, 2023
Rule 13d-1(c), passive investor
591,862
33
VANGUARD FIDUCIARY TRUST CO
13F CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
572,038
34
VANGUARD PORTFOLIO MANAGEMENT LLC
13F CIK 2100121 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
542,128
35
Verdad Advisers, LP
13F CIK 1812822 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
352,093
36
Craig Adam R
Insider CIK 1339498 · Oct 16, 2026
Director, Executive Chairman, issuer-wide, not summed
333,251
37
Volpone John
Insider CIK 2081729 · Aug 12, 2026
President, issuer-wide, not summed
265,305
38
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
13F CIK 884546 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
263,264
38.1
Schwab Small-Cap Index Fund
Fund S000005912 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
196,530
38.2
Schwab Total Stock Market Index Fund
Fund S000005913 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
66,731
39
Stonepine Capital Management, LLC
13F CIK 1440771 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
224,989
40
Bank of New York Mellon Corp
13F CIK 1390777 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
196,340
41
KIRSKE DAVID
Insider CIK 1276750 · Oct 1, 2026
Chief Financial Officer, issuer-wide, not summed
155,983
42
Affinity Asset Advisors, LLC
13F CIK 1773195 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
145,000
43
ORBIMED ADVISORS LLC
13G CIK 1055951 · Registered investment adviser · Jun 30, 2025
Rule 13d-1(c), passive investor
134,947
44
Ragan Paula
Insider CIK 1769914 · Feb 12, 2025
Director, issuer-wide, not summed
111,246
45
Nuveen, LLC
13F CIK 1871926 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
107,389
45.1
Nuveen Small Cap Blend Index Fund
Fund S000005367 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
107,389
46
Invesco Ltd.
13F CIK 914208 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
96,772
46.1
Invesco RAFI US 1500 Small-Mid ETF
Fund S000013120 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
30,166
47
ALPS ADVISORS INC
13F CIK 1376113 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
95,726
48
RHUMBLINE ADVISERS
13F CIK 1115418 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
95,081
49
Susquehanna Portfolio Strategies, LLC
13F CIK 1996449 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
87,282
50
EQ/2000 Managed Volatility Portfolio
Fund S000025800 · Registered fund · Jun 30, 2026
EQ Advisors Trust, not summed
86,641

11 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 156 holders

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Key facts CIK 1501697 CUSIP 98420X202 13F (30d) 8 filings 8 filers Visit website Investor relations