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CABA · Cabaletta Bio, Inc. · Shareholders & Ownership

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$1.61 +0.13 (+8.78%) At close · Oct 20
Market Cap
$272.97M
Shares
169.55M
Volume · Oct 20 3.46M Avg daily vol (3M) 4.85M

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 positions

No 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
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
STATE STREET CORP
13F CIK 93751 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
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
UBS Group AG
13F CIK 1610520 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
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
Nichtberger Steven
13G CIK 1487989 · Unknown · Jun 30, 2025
Rule 13d-1(d), exempt investor
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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Key facts CIK 1759138 CUSIP 12674W109 13F (30d) 7 filings 7 filers Visit website Investor relations