카발레타바이오(주)
US ˙ NasdaqGS ˙ US12674W1099

SecurityCABA / Cabaletta Bio, Inc.
InstitutionMorgan Stanley
Latest Disclosed Ownership1,408,152 shares
Latest Disclosed Value $ 3,787,929
Morgan Stanley reports 4.80% increase in ownership of CABA / Cabaletta Bio, Inc.

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 1,408,152 shares of Cabaletta Bio, Inc. (US:CABA) valued at $3,787,929 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 1,343,708 shares of Cabaletta Bio, Inc.. This represents a change in shares of 4.80% during the quarter. The current value of the position is $4,576,494 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F CABALETTA BIO COM 12674W109 1,408,152 64,444 4.80 3,788 28.72 0.0002
2026-05-27 2025-12-31 13F/A-1 CABALETTA BIO COM 12674W109 1,343,708 -130,968 -8.88 2,943 -14.72 0.0002
2026-02-13 2025-12-31 13F CABALETTA BIO COM 12674W109 1,343,708 -130,968 2,943 0.0002
2026-05-27 2025-09-30 13F/A-1 CABALETTA BIO COM 12674W109 1,474,676 149,870 11.31 3,451 71.39 0.0002
2025-11-14 2025-09-30 13F CABALETTA BIO COM 12674W109 1,474,676 149,870 3,451 0.0002
2025-08-15 2025-06-30 13F CABALETTA BIO COM 12674W109 1,324,806 -384,082 -22.48 2,014 -14.92 0.0001
2025-05-15 2025-03-31 13F CABALETTA BIO COM 12674W109 1,708,888 269,723 18.74 2,367 -27.56 0.0002
2025-05-15 2024-12-31 13F/A-1 CABALETTA BIO COM 12674W109 1,439,165 610,336 73.64 3,267 -16.51 0.0002
2025-02-14 2024-12-31 13F CABALETTA BIO COM 12674W109 1,439,165 610,336 3,267 0.0002
2025-05-14 2024-09-30 13F/A-2 CABALETTA BIO COM 12674W109 828,829 533,320 180.48 3,912 77.01 0.0003
2025-02-14 2024-09-30 13F/A-1 CABALETTA BIO COM 12674W109 828,829 533,320 3,912 0.0003
2024-11-14 2024-09-30 13F CABALETTA BIO COM 12674W109 828,829 533,320 3,912 0.0000
2025-05-14 2024-06-30 13F/A-2 CABALETTA BIO COM 12674W109 295,509 -590,195 -66.64 2,210 -85.37 0.0002
2024-10-17 2024-06-30 13F/A-1 CABALETTA BIO COM 12674W109 295,509 -590,195 2,210 0.0002
2024-08-14 2024-06-30 13F CABALETTA BIO COM 12674W109 295,509 -590,195 2,210 0.0002
2024-10-17 2024-03-31 13F/A-2 CABALETTA BIO COM 12674W109 885,704 498,321 128.64 15,110 71.84 0.0012
2024-08-16 2024-03-31 13F/A-1 CABALETTA BIO COM 12674W109 885,704 498,321 15,110 0.0001
2024-05-15 2024-03-31 13F CABALETTA BIO COM 12674W109 885,704 498,321 15,110 0.0012
2024-08-16 2023-12-31 13F/A-1 CABALETTA BIO COM 12674W109 387,383 165,366 74.48 8,794 160.22 0.0008
2024-02-13 2023-12-31 13F CABALETTA BIO COM 12674W109 387,383 165,366 8,794 0.0008
2023-11-15 2023-09-30 13F CABALETTA BIO COM 12674W109 222,017 14,656 7.07 3,379 26.22 0.0003
2023-08-14 2023-06-30 13F CABALETTA BIO COM 12674W109 207,361 5,005 2.47 2,677 60.01 0.0003
2023-05-15 2023-03-31 13F CABALETTA BIO COM 12674W109 202,356 2,201 1.10 1,673 -9.62 0.0002
2023-02-14 2022-12-31 13F CABALETTA BIO COM 12674W109 200,155 30,735 18.14 1,851 1,582.73 0.0002
2022-11-14 2022-09-30 13F CABALETTA BIO COM 12674W109 169,420 47,520 38.98 110 -14.73 0.0000
2022-10-27 2022-06-30 13F/A-1 CABALETTA BIO COM 12674W109 121,900 22,003 22.03 129 -36.45 0.0000
2022-08-15 2022-06-30 13F CABALETTA BIO COM 12674W109 121,900 22,003 129 0.0000
2022-10-27 2022-03-31 13F/A-1 CABALETTA BIO COM 12674W109 99,897 49,326 97.54 203 6.28 0.0000
2022-05-13 2022-03-31 13F CABALETTA BIO COM 12674W109 99,897 49,326 203 0.0000
2022-02-14 2021-12-31 13F CABALETTA BIO COM 12674W109 50,571 -29,347 -36.72 191 -80.35 0.0000
2021-11-15 2021-09-30 13F CABALETTA BIO COM 12674W109 79,918 -29,291 -26.82 972 3.40 0.0001
2021-08-23 2021-06-30 13F/A-1 CABALETTA BIO COM 12674W109 109,209 85,531 361.23 940 257.41 0.0001
2021-08-16 2021-06-30 13F CABALETTA BIO COM 12674W109 109,209 85,531 940 0.0000
2021-05-17 2021-03-31 13F CABALETTA BIO COM 12674W109 23,678 -10,384 -30.49 263 -38.12 0.0000
2021-02-16 2020-12-31 13F CABALETTA BIO COM 12674W109 34,062 -11,282 -24.88 425 -13.62 0.0001
2020-11-13 2020-09-30 13F CABALETTA BIO COM 12674W109 45,344 8,357 22.59 492 19.42 0.0001
2020-08-14 2020-06-30 13F CABALETTA BIO COM 12674W109 36,987 31,386 560.36 412 904.88 0.0001
2020-05-26 2020-03-31 13F/A-1 CABALETTA BIO COM 12674W109 5,601 -4,729 -45.78 41 -71.53 0.0000
2020-05-15 2020-03-31 13F CABALETTA BIO COM 12674W109 5,601 -4,729 41 3.1497
2020-02-14 2019-12-31 13F CABALETTA BIO COM 12674W109 10,330 10,330 144 0.0000
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.