Security key
12674W109
Cabaletta Bio, Inc. - Common Stock, $0.00001 par value per share (CABA)
CUSIP: 12674W109
Q2 2026 13F Holders as of 30 Jun 2026
- Security type / class
- Equity / Common Stock, $0.00001 par value per share
- Total 13F shares
- 157,871,743
- Total 13F value
- $490,441,760
- Share change
- +73,177,661
- Put/Call ratio
- 5%
- SEC-reported price per share
- $3.11
- Number of holders
- 140
- Value change
- +$228,195,028
- Number of buys
- 103
- Number of sells
- 43
- Shares outstanding
- 172,587,037
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2026
Institutions
140
Top holders
10
CABA full security history
Ownership snapshot
Full 13F holder table
Cabaletta Bio, Inc. SEC filings
Cabaletta Bio, Inc. company facts
Broader feeds
Ownership snapshot
Top reported holders of CABA - Cabaletta Bio, Inc. - Common Stock, $0.00001 par value per share (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
T. Rowe Price Investment ...
Disclosed value leader
JENNISON ASSOCIATES LLC
Comparable rows
15/15
Latest evidence
30 Jun 2026
13D/G
13F
3/4/5
Lead comparable stake: 12%
13D/G row: T. Rowe Price Investment Management, Inc.
Showing 1-6 of 15 holder rows.
Quick read
T. Rowe Price Investment Management, Inc. leads the comparable SEC ownership view at 12%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens T. Rowe Price Investment Management, Inc.'s linked filing trail.
Comparable ownership
Top 5
T. Rowe Price Investment Manageme...
12%
JENNISON ASSOCIATES LLC
11%
PRUDENTIAL FINANCIAL INC
11%
Bain Capital Life Sciences Opport...
10%
Adage Capital Management, L.P.
8.4%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| T. Rowe Price Investment Management, Inc. |
13D/G
13F
Company
|
12%
|
$52,269,642
18,869,907 shares
|
+$24,962,270 | 30 Jun 2026 |
| JENNISON ASSOCIATES LLC |
13D/G
13F
Company
|
11%
|
$88,092,767
24,267,980 shares
|
+$42,410,898 | 29 May 2026 |
| PRUDENTIAL FINANCIAL INC |
13D/G
|
11%
|
$88,092,767
24,267,980 shares
|
+$42,410,898 | 31 May 2026 |
| Bain Capital Life Sciences Opportunities III, LP |
13D/G
|
10%
|
$47,758,803
17,241,445 shares
|
+$20,953,166 | 30 Jun 2026 |
| Adage Capital Management, L.P. |
13D/G
|
8.4%
|
$39,264,080
14,174,758 shares
|
+$14,326,933 | 30 Jun 2026 |
| Cormorant Asset Management, LP |
13D/G
13F
Company
|
6%
|
$27,700,000
10,000,000 shares
|
-$1,385,000 | 30 Jun 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q2 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
140
Shares
157,871,743
Rows available
140
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q2 2026 vs Q1 2026 Across Filers
Q1 2026 holders
107
Q2 2026 holders
140
Holder diff
33
| Investor | Q1 2026 Shares | Q2 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q2 2026 value | Value change | Value Chg % |
|---|