Latest Period
Q2 2026
Security Snapshot
Cabaletta Bio, Inc. - Common Stock, $0.00001 par value per share (CABA) Institutional Ownership
CUSIP: 12674W109
13F Institutional Holders and Ownership History from Q4 2019 to Q2 2026
Institutions Reporting
140
Shares (Excl. Options)
157,871,743
Price
$3.11
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- Security type / class
- Equity / Common Stock, $0.00001 par value per share
- Symbol
- CABA on Nasdaq
- All holders as of 30 Jun 2026
- Q2 2026
- Total 13F shares
- 157,871,743
- Total 13F value
- $490,441,760
- Portfolio coverage rank
- 0%
- Share change
- +73,177,661
- Value change
- +$228,195,028
- Number of holders
- 140
- Shares outstanding
- 172,587,037
- SEC-reported price per share
- $2.72
- Insider filing price
- $2.72
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- CABA - Cabaletta Bio, Inc. - Common Stock, $0.00001 par value per share is tracked under CUSIP 12674W109.
- 140 institutions reported positions in Q2 2026.
- 14 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 107 to 140 between Q1 2026 and Q2 2026.
- SEC-reported value moved from $227,512,889 to $490,441,760.
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 140 institutions filings for Q2 2026.
Security key
12674W109
Latest holder period
Q2 2026
13F holders
140
13D/G owners
14
CIK / CUSIP context first
Open Q2 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
14
Security
CABA
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| JENNISON ASSOCIATES LLC | 11% | +28% | $88,092,767 | +$42,410,898 | 24,267,980 | +93% | Jennison Associates LLC | 29 May 2026 |
| PRUDENTIAL FINANCIAL INC | 11% | +28% | $88,092,767 | +$42,410,898 | 24,267,980 | +93% | PRUDENTIAL FINANCIAL INC | 31 May 2026 |
| T. Rowe Price Investment Management, Inc. | 12% | +14% | $52,269,642 | +$24,962,270 | 18,869,907 | +91% | T. Rowe Price Investment Management, Inc. | 30 Jun 2026 |
| Bain Capital Life Sciences Opportunities III, LP | 10% | 0% | $47,758,803 | +$20,953,166 | 17,241,445 | +78% | Bain Capital Life Sciences Opportunities III, LP | 30 Jun 2026 |
| Adage Capital Management, L.P. | 8.4% | -16% | $39,264,080 | +$14,326,933 | 14,174,758 | +57% | Adage Capital Management, L.P. | 30 Jun 2026 |
| Cormorant Asset Management, LP | 6% | -34% | $27,700,000 | -$1,385,000 | 10,000,000 | -4.8% | Cormorant Asset Management, LP | 30 Jun 2026 |
| BlackRock, Inc. | 5.9% | +490% | $29,899,266 | +$27,116,914 | 9,613,912 | +975% | BlackRock, Inc. | 30 Jun 2026 |
| NORGES BANK | 5.4% | $24,308,559 | 8,775,653 | Norges Bank | 30 Jun 2026 | |||
| VANGUARD CAPITAL MANAGEMENT LLC | 5.1% | $22,979,319 | 8,295,783 | Vanguard Capital Management | 30 Jun 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 | |||
| MILLENNIUM MANAGEMENT LLC | 1.3% | -80% | $6,433,007 | -$9,523,666 | 2,068,491 | -60% | Millennium Management LLC | 30 Jun 2026 |
As of 30 Jun 2026, 140 institutional investors reported holding 157,871,743 shares of Cabaletta Bio, Inc. - Common Stock, $0.00001 par value per share (CABA). This represents 91% of the company’s total 172,587,037 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
80%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| JENNISON ASSOCIATES LLC | 12% | 20,033,730 | +123% | 0.04% | $62,304,900 |
| T. Rowe Price Investment Management, Inc. | 11% | 18,869,907 | +70% | 0.04% | $58,686,000 |
| Bain Capital Life Sciences Investors, LLC | 10% | 17,241,445 | +78% | 3.2% | $53,620,894 |
| BlackRock, Inc. | 6.2% | 10,754,701 | +353% | 0% | $33,447,121 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 5.3% | 9,174,758 | +3.9% | 0.04% | $28,533,497 |
| STATE STREET CORP | 4.5% | 7,839,305 | +1568% | 0% | $24,380,239 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.2% | 7,227,018 | +79% | 0% | $22,476,026 |
| Cormorant Asset Management, LP | 2.9% | 5,000,000 | -9.1% | 0.8% | $15,550,000 |
| PRICE T ROWE ASSOCIATES INC /MD/ | 2.6% | 4,418,674 | +899% | 0% | $13,744,000 |
| Woodline Partners LP | 2.4% | 4,200,142 | +236% | 0.04% | $13,062,442 |
| NORGES BANK | 2.4% | 4,112,401 | 0% | $12,789,567 | |
| Opaleye Management Inc. | 2.2% | 3,863,800 | +180% | 1.1% | $12,016,418 |
| CITADEL ADVISORS LLC | 2% | 3,522,112 | 0.01% | $10,953,768 | |
| GEODE CAPITAL MANAGEMENT, LLC | 2% | 3,459,464 | +205% | 0% | $10,761,875 |
| FRANKLIN RESOURCES INC | 1.4% | 2,413,937 | 0% | $7,507,344 | |
| GOLDMAN SACHS GROUP INC | 1.3% | 2,211,825 | +182% | 0% | $6,878,776 |
| MILLENNIUM MANAGEMENT LLC | 1.2% | 2,068,491 | -65% | 0% | $6,433,007 |
| MARSHALL WACE, LLP | 0.91% | 1,565,939 | -28% | 0% | $4,870,070 |
| RENAISSANCE TECHNOLOGIES LLC | 0.89% | 1,535,300 | -25% | 0.01% | $4,774,783 |
| UBS Group AG | 0.85% | 1,471,895 | +143% | 0% | $4,577,594 |
| Qube Research & Technologies Ltd | 0.83% | 1,426,840 | -26% | 0% | $4,437,472 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 0.82% | 1,418,108 | 0% | $4,410,316 | |
| TWO SIGMA INVESTMENTS, LP | 0.82% | 1,410,931 | -44% | 0% | $4,387,995 |
| MORGAN STANLEY | 0.78% | 1,345,526 | -4.4% | 0% | $4,184,586 |
| SPHERA FUNDS MANAGEMENT LTD. | 0.77% | 1,329,012 | 0.59% | $4,133,227 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
27
Latest
Q2 2026
Rows shown
1-25 of 27
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q2 | 157,871,743 | $490,441,760 | +$228,195,028 | $3.11 | 140 |
| 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 |