CABA · Cabaletta Bio, Inc. · Shareholders & Ownership
Substantial doubt about the company's ability to continue as a going concern.
“we have concluded that substantial doubt exists about the Company’s ability to continue as a going concern.”View the 10-Q filed Aug 13, 2026
Every disclosed holder of CABA 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 CABA
13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positionsNo chart: the summed disclosures exceed shares outstanding, so they are not parts of one whole.
| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 157,919,092 | 93.14% |
| Insiders (Forms 3, 4, 5) | 0 | 0.00% |
| 13D/G-only blocks | 17,956,387 | 10.59% |
| Remaining | 6,330,034 | -3.73% |
| Registered funds (N-PORT, not summed) | 48,611,289 | 28.67% |
Shares outstanding: 169,545,445, 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 CABA
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
JENNISON ASSOCIATES LLC
13F
CIK 53417 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
20,033,730 | ||
| 2 |
T. Rowe Price Investment Management, Inc.
13F
CIK 1897612 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
18,869,907 | ||
| 2.1 |
T. Rowe Price Investment Management, Inc.
13G
CIK 1897612 · Investment adviser · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
|
18,869,907 | ||
| 3 |
Bain Capital Life Sciences Investors, LLC
13F
CIK 1703031 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
17,241,445 | ||
| 3.1 |
Bain Capital Life Sciences Opportunities III, LP
13G
CIK 1950105 · Unknown · Jun 30, 2026
Rule 13d-1(c), passive investor, not summed
|
17,241,445 | ||
| 4 |
BlackRock, Inc.
13F
CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
10,754,701 | ||
| 4.1 |
BlackRock, Inc.
13G
CIK 2012383 · Holding company · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
|
9,613,912 | ||
| 4.2 |
iShares Russell 2000 ETF
Fund
S000004344 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
2,926,762 | ||
| 4.3 |
iShares Biotechnology ETF
Fund
S000004350 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
1,007,313 | ||
| 4.4 |
iShares Russell 2000 Value ETF
Fund
S000004342 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
523,569 | ||
| 4.5 |
iShares Russell 2000 Growth ETF
Fund
S000004343 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
486,921 | ||
| 5 |
ADAGE CAPITAL PARTNERS GP, L.L.C.
13F
CIK 1165408 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
9,174,758 | ||
| 5.1 |
Adage Capital Management, L.P.
13G
CIK 1535978 · Investment adviser · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
|
14,174,758 | ||
| 6 |
|
7,839,305 | ||
| 6.1 |
State Street(R) SPDR(R) S&P(R) Biotech ETF
Fund
S000010018 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
5,256,225 | ||
| 6.2 |
STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO
Fund
S000050332 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
|
38,100 | ||
| 6.3 |
State Street Total Return V.I.S. Fund
Fund
S000001637 · Registered fund · Jun 30, 2026
STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
|
2,842 | ||
| 6.4 |
State Street Balanced Index Fund
Fund
S000082802 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
|
1,391 | ||
| 7 |
VANGUARD CAPITAL MANAGEMENT LLC
13F
CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
7,227,018 | ||
| 7.1 |
VANGUARD CAPITAL MANAGEMENT LLC
13G
CIK 2100119 · Registered investment adviser · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
|
8,295,783 | ||
| 8 |
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund
S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
5,215,188 | ||
| 9 |
Cormorant Asset Management, LP
13F
CIK 1583977 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
5,000,000 | ||
| 9.1 |
Cormorant Asset Management, LP
13G
CIK 1583977 · Registered investment adviser · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
|
10,000,000 | ||
| 10 |
PGIM Jennison Health Sciences Fund
Fund
S000004380 · Registered fund · May 29, 2026
Prudential Sector Funds, Inc., not summed
|
4,960,717 | ||
| 11 |
Alyeska Investment Group, L.P.
13G
CIK 1453072 · Registered investment adviser · Dec 31, 2025
Rule 13d-1(b), qualified institution
|
4,500,000 | ||
| 12 |
PRICE T ROWE ASSOCIATES INC /MD/
13F
CIK 80255 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
4,418,674 | ||
| 12.1 |
T. Rowe Price Small-Cap Value Fund, Inc.
Fund
S000002121 · Registered fund · Jun 30, 2026
T. ROWE PRICE SMALL-CAP VALUE FUND, INC., not summed
|
7,865,614 | ||
| 12.2 |
T. Rowe Price Health Sciences Fund, Inc.
Fund
S000002088 · Registered fund · Jun 30, 2026
T. ROWE PRICE HEALTH SCIENCES FUND, INC., not summed
|
1,795,663 | ||
| 12.3 |
T. Rowe Price Small-Cap Stock Fund, Inc.
Fund
S000002120 · Registered fund · Jun 30, 2026
T. ROWE PRICE SMALL-CAP STOCK FUND, INC., not summed
|
1,387,457 | ||
| 12.4 |
T. Rowe Price New Horizons Fund, Inc.
Fund
S000002106 · Registered fund · Jun 30, 2026
T. ROWE PRICE NEW HORIZONS FUND, INC., not summed
|
1,369,957 | ||
| 12.5 |
T. Rowe Price Institutional Small-Cap Stock Fund
Fund
S000002094 · Registered fund · Jun 30, 2026
T. Rowe Price Equity Funds, Inc., not summed
|
746,576 | ||
| 13 |
Woodline Partners LP
13F
CIK 1784547 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
4,200,142 | ||
| 14 |
NORGES BANK
13F
CIK 1374170 · Non-US institution · Jun 30, 2026
carried, not yet filed for the newest quarter
|
4,112,401 | ||
| 14.1 |
NORGES BANK
13G
CIK 1374170 · Non-US institution · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
|
8,775,653 | ||
| 15 |
Opaleye Management Inc.
13F
CIK 1595855 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
3,863,800 | ||
| 16 |
CITADEL ADVISORS LLC
13F
CIK 1423053 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
3,522,112 | ||
| 17 |
GEODE CAPITAL MANAGEMENT, LLC
13F
CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
3,459,464 | ||
| 18 |
PGIM Jennison Small Company Fund
Fund
S000004629 · Registered fund · Jun 30, 2026
Prudential Jennison Small Co Fund, Inc., not summed
|
2,696,273 | ||
| 19 |
FRANKLIN RESOURCES INC
13F
CIK 38777 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,413,937 | ||
| 19.1 |
Franklin Biotechnology Discovery Fund
Fund
S000006882 · Registered fund · Jul 31, 2026
Franklin Strategic Series, not summed
|
876,846 | ||
| 20 |
GOLDMAN SACHS GROUP INC
13F
CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,211,825 | ||
| 20.1 |
Goldman Sachs Small Cap Equity Insights Fund
Fund
S000009329 · Registered fund · Jul 31, 2026
Goldman Sachs Trust, not summed
|
303,059 | ||
| 20.2 |
Goldman Sachs Small Cap Value Insights Fund
Fund
S000014929 · Registered fund · Jul 31, 2026
Goldman Sachs Trust, not summed
|
115,487 | ||
| 20.3 |
Goldman Sachs Small Cap Growth Insights Fund
Fund
S000014930 · Registered fund · Jul 31, 2026
Goldman Sachs Trust, not summed
|
66,996 | ||
| 20.4 |
Goldman Sachs Variable Insurance Trust Small Cap Equity Insights Fund
Fund
S000009355 · Registered fund · Jun 30, 2026
Goldman Sachs Variable Insurance Trust, not summed
|
48,754 | ||
| 20.5 |
Goldman Sachs Absolute Return Tracker Fund
Fund
S000020314 · Registered fund · Jun 30, 2026
GOLDMAN SACHS TRUST, not summed
|
30,249 | ||
| 21 |
Lynx1 Capital Management LP
13G
CIK 1910456 · Registered investment adviser · Dec 31, 2023
Rule 13d-1(c), passive investor
|
2,139,644 | ||
| 22 |
MILLENNIUM MANAGEMENT LLC
13F
CIK 1273087 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,068,491 | ||
| 22.1 |
MILLENNIUM MANAGEMENT LLC
13G
CIK 1273087 · Registered investment adviser · Jun 30, 2026
Rule 13d-1(c), passive investor, not summed
|
2,068,491 | ||
| 23 |
Deerfield Management Company, L.P.
13G
CIK 1352546 · Unknown · Dec 31, 2023
Rule 13d-1(c), passive investor
|
2,007,729 | ||
| 24 |
Commodore Capital LP
13G
CIK 1831942 · Registered investment adviser · Dec 31, 2023
Rule 13d-1(c), passive investor
|
1,900,000 | ||
| 25 |
VANGUARD EXTENDED MARKET INDEX FUND
Fund
S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
1,878,039 | ||
| 26 |
Venrock Healthcare Capital Partners III, L.P.
13G
CIK 1738048 · Unknown · Sep 30, 2024
Rule 13d-1(c), passive investor
|
1,590,696 | ||
| 27 |
MARSHALL WACE, LLP
13F
CIK 1318757 · Exempt reporting adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,565,939 | ||
| 28 |
RENAISSANCE TECHNOLOGIES LLC
13F
CIK 1037389 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,535,300 | ||
| 29 |
|
1,471,895 | ||
| 30 |
BAKER BROS. ADVISORS LP
13G
CIK 1263508 · Registered investment adviser · Dec 31, 2023
Rule 13d-1(b), qualified institution
|
1,457,626 | ||
| 31 |
Qube Research & Technologies Ltd
13F
CIK 1729829 · Exempt reporting adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,426,840 | ||
| 32 |
VANGUARD PORTFOLIO MANAGEMENT LLC
13F
CIK 2100121 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,418,108 | ||
| 33 |
TWO SIGMA INVESTMENTS, LP
13F
CIK 1179392 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,410,931 | ||
| 34 |
Nichtberger Steven
Insider
CIK 1487989 · Jan 21, 2026
Director, President & CEO, issuer-wide, not summed
|
1,394,483 | ||
| 34.1 |
|
3,034,499 | ||
| 35 |
MORGAN STANLEY
13F
CIK 895421 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,345,526 | ||
| 36 |
SPHERA FUNDS MANAGEMENT LTD.
13F
CIK 1496201 · Exempt reporting adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,329,012 | ||
| 37 |
Alger Associates, Inc. 13-3017981
13G
CIK 1000264 · Holding company · Nov 30, 2024
Rule 13d-1(b), qualified institution
|
1,326,193 | ||
| 38 |
SUPERSTRING CAPITAL MANAGEMENT LP
13F
CIK 1931118 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,278,652 | ||
| 39 |
VANGUARD FIDUCIARY TRUST CO
13F
CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,088,595 | ||
| 40 |
NORTHERN TRUST CORP
13F
CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,007,102 | ||
| 40.1 |
Small Cap Index Fund
Fund
S000001245 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
55,350 | ||
| 40.2 |
Small Cap Core Fund
Fund
S000001244 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
8,572 | ||
| 41 |
DIMENSIONAL FUND ADVISORS LP
13F
CIK 354204 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
967,195 | ||
| 41.1 |
Dimensional U.S. Small Cap ETF
Fund
S000070906 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
334,526 | ||
| 41.2 |
U.S. SMALL CAP PORTFOLIO
Fund
S000000971 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
301,437 | ||
| 41.3 |
U.S. MICRO CAP PORTFOLIO
Fund
S000000948 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
80,701 | ||
| 41.4 |
Dimensional US Core Equity Market ETF
Fund
S000069432 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
22,315 | ||
| 41.5 |
U.S. CORE EQUITY 1 PORTFOLIO
Fund
S000000979 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
17,765 | ||
| 42 |
Stonepine Capital Management, LLC
13F
CIK 1440771 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
917,100 | ||
| 43 |
SCHRODER INVESTMENT MANAGEMENT GROUP
13F
CIK 1086619 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
856,637 | ||
| 44 |
AMERIPRISE FINANCIAL INC
13F
CIK 820027 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
828,145 | ||
| 44.1 |
Columbia Research Enhanced Small Cap ETF
Fund
S000095313 · Registered fund · Jun 30, 2026
Columbia ETF Trust I, not summed
|
167 | ||
| 45 |
CANTOR FITZGERALD, L. P.
13F
CIK 1024896 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
800,001 | ||
| 46 |
HEIGHTS CAPITAL MANAGEMENT, INC
13F
CIK 1081698 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
755,626 | ||
| 47 |
Blue Owl Capital Holdings LP
13F
CIK 1858703 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
714,710 | ||
| 48 |
Burkehill Global Management, LP
13F
CIK 1904549 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
700,000 | ||
| 49 |
Ikarian Capital, LLC
13F
CIK 1778253 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
700,000 | ||
| 50 |
GSA CAPITAL PARTNERS LLP
13F
CIK 1362033 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
668,563 |
18 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 215 holders
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