Latest Period
Q1 2026
Security Snapshot
Cabaletta Bio, Inc. - Common Stock, par value $0.00001 per share (CABA) Institutional Ownership
CUSIP: 12674W109
13F Institutional Holders and Ownership History from Q4 2019 to Q1 2026
Institutions Reporting
107
Shares (Excl. Options)
84,676,032
Price
$2.69
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- Security type / class
- Equity / Common Stock, par value $0.00001 per share
- Symbol
- CABA on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 84,676,032
- Total 13F value
- $227,512,889
- Portfolio coverage rank
- 0%
- Share change
- +8,213,949
- Value change
- +$22,873,063
- Number of holders
- 107
- Shares outstanding
- 116,279,070
- SEC-reported price per share
- $3.63
- Insider filing price
- $3.63
Latest holder snapshot
5 facts
Issuer context
3 facts
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- CABA - Cabaletta Bio, Inc. - Common Stock, par value $0.00001 per share is tracked under CUSIP 12674W109.
- 107 institutions reported positions in Q1 2026.
- 12 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 93 to 107 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $166,934,120 to $227,512,889.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC Evidence
Latest holder context comes from 107 institutions filings for Q1 2026.
Security key
12674W109
Latest holder period
Q1 2026
13F holders
107
13D/G owners
12
CIK / CUSIP context first
Open Q1 2026 holders
CABA full holder history
Cabaletta Bio, Inc. SEC filings
Cabaletta Bio, Inc. company facts
Cabaletta Bio, Inc. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 12674W109:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
12
Security
CABA
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| PRUDENTIAL FINANCIAL INC | 8.9% | +21% | $29,447,817 | +$5,132,486 | 12,584,537 | +21% | PRUDENTIAL FINANCIAL INC | 30 Sep 2025 |
| JENNISON ASSOCIATES LLC | 8.9% | +24% | $29,447,817 | +$5,797,046 | 12,584,537 | +25% | Jennison Associates LLC | 30 Sep 2025 |
| Cormorant Asset Management, LP | 9% | -2.8% | $31,605,000 | +$3,311,000 | 10,500,000 | +12% | Cormorant Asset Management, LP | 31 Mar 2026 |
| T. Rowe Price Investment Management, Inc. | 10% | -10% | $21,589,583 | -$1,099,531 | 9,858,257 | -4.8% | T. Rowe Price Investment Management, Inc. | 31 Dec 2025 |
| Bain Capital Life Sciences Opportunities III, LP | 10% | $15,483,400 | 9,677,125 | Bain Capital Life Sciences Opportunities III, LP | 30 Jun 2025 | |||
| Adage Capital Management, L.P. | 10% | $14,404,128 | 9,002,580 | Adage Capital Management, L.P. | 30 Jun 2025 | |||
| MILLENNIUM MANAGEMENT LLC | 5.3% | $15,494,904 | 5,130,763 | Millennium Management LLC | 11 Feb 2026 | |||
| Alyeska Investment Group, L.P. | 4.7% | -23% | $9,855,000 | -$2,847,000 | 4,500,000 | -22% | Alyeska Investment Group, L.P. | 31 Dec 2025 |
| VANGUARD GROUP INC | 3.8% | $5,245,105 | 3,450,727 | The Vanguard Group | 30 Jun 2025 | |||
| CITADEL ADVISORS LLC | 3.4% | -36% | $7,371,644 | -$3,903,787 | 3,150,275 | -35% | Kenneth Griffin | 30 Sep 2025 |
| Nichtberger Steven | 3.3% | $4,855,198 | 3,034,499 | Nichtberger Steven | 30 Jun 2025 | |||
| BlackRock, Inc. | 1% | -86% | $1,359,774 | -$3,803,722 | 894,647 | -74% | BlackRock, Inc. | 30 Jun 2025 |
As of 31 Mar 2026, 107 institutional investors reported holding 84,676,032 shares of Cabaletta Bio, Inc. - Common Stock, par value $0.00001 per share (CABA). This represents 73% of the company’s total 116,279,070 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
66%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| T. Rowe Price Investment Management, Inc. | 9.5% | 11,080,005 | +12% | 0.02% | $29,806,000 |
| Bain Capital Life Sciences Investors, LLC | 8.3% | 9,677,125 | 0% | 2.3% | $26,031,466 |
| JENNISON ASSOCIATES LLC | 7.7% | 8,970,578 | +0.73% | 0.02% | $24,130,854 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 7.6% | 8,829,758 | 0% | 0.04% | $23,752,049 |
| MILLENNIUM MANAGEMENT LLC | 5.1% | 5,903,281 | +116% | 0.01% | $15,879,826 |
| Cormorant Asset Management, LP | 4.7% | 5,500,000 | +25% | 0.75% | $14,795,000 |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.5% | 4,028,991 | 0% | 0% | $10,837,986 |
| TWO SIGMA INVESTMENTS, LP | 2.1% | 2,497,917 | +36% | 0.01% | $6,719,397 |
| BlackRock, Inc. | 2% | 2,373,003 | +1.9% | 0% | $6,383,378 |
| MARSHALL WACE, LLP | 1.9% | 2,179,818 | +127% | 0.01% | $5,863,709 |
| RENAISSANCE TECHNOLOGIES LLC | 1.8% | 2,036,663 | +34% | 0.01% | $5,478,623 |
| Qube Research & Technologies Ltd | 1.7% | 1,934,990 | +484% | 0.01% | $5,205,123 |
| MORGAN STANLEY | 1.2% | 1,408,152 | +4.8% | 0% | $3,787,929 |
| Opaleye Management Inc. | 1.2% | 1,380,000 | +53% | 0.51% | $3,712,200 |
| Woodline Partners LP | 1.1% | 1,250,242 | 0% | 0.01% | $3,363,151 |
| GEODE CAPITAL MANAGEMENT, LLC | 0.97% | 1,133,245 | +4.4% | 0% | $3,049,912 |
| SUPERSTRING CAPITAL MANAGEMENT LP | 0.92% | 1,066,239 | -53% | 2% | $2,868,183 |
| Ikarian Capital, LLC | 0.77% | 900,000 | 0% | 0.35% | $2,421,000 |
| GOLDMAN SACHS GROUP INC | 0.67% | 783,220 | +82% | 0% | $2,106,862 |
| CANTOR FITZGERALD, L. P. | 0.66% | 765,000 | 0.07% | $2,057,850 | |
| SCHRODER INVESTMENT MANAGEMENT GROUP | 0.65% | 756,637 | 0% | 0% | $1,868,893 |
| DIMENSIONAL FUND ADVISORS LP | 0.64% | 740,648 | +64% | 0% | $1,990,152 |
| Burkehill Global Management, LP | 0.6% | 700,000 | 0% | 0.09% | $1,883,000 |
| UBS Group AG | 0.52% | 606,664 | +46% | 0% | $1,631,926 |
| VANGUARD FIDUCIARY TRUST CO | 0.49% | 570,191 | 0% | 0% | $1,533,814 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
26
Latest
Q1 2026
Rows shown
1-25 of 26
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 84,676,032 | $227,512,889 | +$22,873,063 | $2.69 | 107 |
| 2025 Q4 | 76,246,689 | $166,934,120 | +$13,771,729 | $2.19 | 93 |
| 2025 Q3 | 71,298,009 | $166,850,266 | -$6,956,298 | $2.34 | 75 |
| 2025 Q2 | 72,777,604 | $110,698,611 | +$55,724,802 | $1.52 | 85 |
| 2025 Q1 | 36,304,416 | $50,331,609 | -$5,413,459 | $1.38 | 91 |
| 2024 Q4 | 38,433,072 | $87,226,012 | -$42,983,423 | $2.27 | 104 |
| 2024 Q3 | 48,049,164 | $226,748,702 | -$34,699,190 | $4.72 | 116 |
| 2024 Q2 | 50,801,335 | $379,995,301 | -$32,124,100 | $7.48 | 137 |
| 2024 Q1 | 51,050,542 | $870,921,299 | +$27,212,602 | $17.06 | 157 |
| 2023 Q4 | 48,539,586 | $1,101,850,659 | +$176,650,504 | $22.70 | 128 |
| 2023 Q3 | 40,903,546 | $622,571,929 | +$72,079,488 | $15.22 | 97 |
| 2023 Q2 | 36,440,182 | $470,450,874 | +$156,067,581 | $12.91 | 84 |
| 2023 Q1 | 24,651,946 | $203,869,260 | +$38,611,553 | $8.27 | 70 |
| 2022 Q4 | 19,878,011 | $183,868,921 | +$77,826,088 | $9.25 | 60 |
| 2022 Q3 | 11,928,226 | $7,751,081 | -$5,492,347 | $0.65 | 45 |
| 2022 Q2 | 16,803,742 | $17,812,960 | -$3,030,205 | $1.06 | 48 |
| 2022 Q1 | 18,183,343 | $36,877,990 | -$1,968,981 | $2.03 | 56 |
| 2021 Q4 | 18,168,410 | $68,859,189 | -$10,075,938 | $3.79 | 60 |
| 2021 Q3 | 17,375,298 | $211,265,514 | +$20,553,121 | $12.16 | 60 |
| 2021 Q2 | 15,752,840 | $135,465,315 | -$5,391,551 | $8.60 | 60 |
| 2021 Q1 | 16,228,404 | $180,131,214 | +$595,907 | $11.10 | 67 |
| 2020 Q4 | 16,173,259 | $201,828,469 | -$2,182,506 | $12.48 | 54 |
| 2020 Q3 | 16,353,879 | $177,273,014 | -$991,132 | $10.84 | 54 |
| 2020 Q2 | 16,442,959 | $183,160,097 | +$5,139,597 | $11.14 | 51 |
| 2020 Q1 | 16,009,620 | $116,871,000 | -$3,057,830 | $7.30 | 41 |