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Cabaletta Bio, Inc. (CABA) institutional ownership

Latest close $2.75 Jul 20, 2026
Market cap$130M 52-week range SectorHealthcare
Funds holding · Q1 2026
96
reported CABA position changes
Top owners · Q1 2026
No disclosed owners are available.
Institutional activity · Q1 2026
Activity unavailable N/A
57 buyers · 39 sellers

Cabaletta Bio, Inc. (CABA) price and institutional activity

Dates

Q1 2026

$0 bought by 57 investors
Millennium Management LLCQube Research & Technologies Ltd +55 more
$0 sold by 39 investors
Superstring Capital Management LPSchonfeld Strategic Advisors LLC +37 more
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Bought Sold Totals per quarter; hover a bar for the names.

Cabaletta Bio, Inc. (CABA) institutional activity · 96

Investor Type Est. change Change Δ Own Date
Millennium Management LLC · Added
Change +3.2M Date Q1 2026
Millennium Management LLC Added· Q1 2026 +3.2M Q1 2026
Qube Research & Technologies Ltd · Added
Change +1.6M Date Q1 2026
Qube Research & Technologies Ltd Added· Q1 2026 +1.6M Q1 2026
T. Rowe Price Investment Management, Inc. · Added
Change +1.2M Date Q1 2026
T. Rowe Price Investment Management, Inc. Added· Q1 2026 +1.2M Q1 2026
Marshall Wace, LLP · Added
Change +1.2M Date Q1 2026
Marshall Wace, LLP Added· Q1 2026 +1.2M Q1 2026
Superstring Capital Management LP · Reduced
Change −1.2M Date Q1 2026
Superstring Capital Management LP Reduced· Q1 2026 −1.2M Q1 2026
Schonfeld Strategic Advisors LLC · Reduced
Change −1.2M Date Q1 2026
Schonfeld Strategic Advisors LLC Reduced· Q1 2026 −1.2M Q1 2026
Cormorant Asset Management, LP · Added
Change +1.1M Date Q1 2026
Cormorant Asset Management, LP Added· Q1 2026 +1.1M Q1 2026
Cantor Fitzgerald, L. P. · New
Change +765K Date Q1 2026
Cantor Fitzgerald, L. P. New· Q1 2026 +765K Q1 2026
Two Sigma Advisers, LP · Exited
Change −738K Δ Own −100.0% Date Q1 2026
Two Sigma Advisers, LP Exited· Q1 2026 −738K −100.0% Q1 2026
Two Sigma Investments, LP · Added
Change +658K Δ Own +35.8% Date Q1 2026
Two Sigma Investments, LP Added· Q1 2026 +658K +35.8% Q1 2026
T. Rowe Price Associates · Reduced
Change −652K Date Q1 2026
T. Rowe Price Associates Reduced· Q1 2026 −652K Q1 2026
Ensign Peak Advisors, Inc · Exited
Change −550K Δ Own −100.0% Date Q1 2026
Ensign Peak Advisors, Inc Exited· Q1 2026 −550K −100.0% Q1 2026
Renaissance Technologies LLC Added· Q1 2026 +514K +33.8% Q1 2026
Opaleye Management Inc. · Added
Change +480K Date Q1 2026
Opaleye Management Inc. Added· Q1 2026 +480K Q1 2026
Jane Street Group, LLC · Reduced
Change −414K Date Q1 2026
Jane Street Group, LLC Reduced· Q1 2026 −414K Q1 2026
Data through Q1 2026 · filed May 15, 2026
15 of 96

Famous investor activity in Cabaletta Bio, Inc. (CABA)

Cabaletta Bio, Inc. (CABA) insider trading

Company insiders, action and economics first; trade and filed dates last.
Dates
Insider Title Type Price Qty Value Owned ΔOwn Trade date Filed date
Tomasello Shawn · Director Grant (A) 22K
Owned 22K Trade date Jun 9, 2026 Filed date Jun 10, 2026
Tomasello Shawn Director Grant (A) 22K 22K Jun 9, 2026 Jun 10, 2026
Simon Mark · Director Grant (A) 22K
Owned 22K Trade date Jun 9, 2026 Filed date Jun 10, 2026
Simon Mark Director Grant (A) 22K 22K Jun 9, 2026 Jun 10, 2026
Henriques Richard C. Jr · Director Grant (A) 22K
Owned 22K Trade date Jun 9, 2026 Filed date Jun 10, 2026
Henriques Richard C. Jr Director Grant (A) 22K 22K Jun 9, 2026 Jun 10, 2026
Bollard Catherine · Director Grant (A) 22K
Owned 22K Trade date Jun 9, 2026 Filed date Jun 10, 2026
Bollard Catherine Director Grant (A) 22K 22K Jun 9, 2026 Jun 10, 2026
Brun Scott C. · Director Grant (A) 22K
Owned 22K Trade date Jun 9, 2026 Filed date Jun 10, 2026
Brun Scott C. Director Grant (A) 22K 22K Jun 9, 2026 Jun 10, 2026
Das Arun · Officer Grant (A) 175K
Owned 175K Trade date Mar 2, 2026 Filed date Mar 2, 2026
Das Arun Officer Grant (A) 175K 175K Mar 2, 2026 Mar 2, 2026
Gerard Michael · Officer Grant (A) 175K
Owned 175K Trade date Mar 2, 2026 Filed date Mar 2, 2026
Gerard Michael Officer Grant (A) 175K 175K Mar 2, 2026 Mar 2, 2026
Binder Gwendolyn · Officer Grant (A) 225K
Owned 225K Trade date Mar 2, 2026 Filed date Mar 2, 2026
Binder Gwendolyn Officer Grant (A) 225K 225K Mar 2, 2026 Mar 2, 2026
Chang David J. · Officer Grant (A) 225K
Owned 225K Trade date Mar 2, 2026 Filed date Mar 2, 2026
Chang David J. Officer Grant (A) 225K 225K Mar 2, 2026 Mar 2, 2026
Nichtberger Steven · Director, Officer Grant (A) 674K
Owned 674K Trade date Mar 2, 2026 Filed date Mar 2, 2026
Nichtberger Steven Director, Officer Grant (A) 674K 674K Mar 2, 2026 Mar 2, 2026
Marda Anup · Officer Grant (A) 225K
Owned 225K Trade date Mar 2, 2026 Filed date Mar 2, 2026
Marda Anup Officer Grant (A) 225K 225K Mar 2, 2026 Mar 2, 2026
Chang David J. · Officer Buy +$20K
Price $2.26 Qty +9K Owned 9K Trade date Jan 21, 2026 Filed date Jan 21, 2026
Chang David J. Officer Buy $2.26 +9K +$20K 9K Jan 21, 2026 Jan 21, 2026
Binder Gwendolyn · Officer Buy +$25K
Price $2.19 Qty +11K Owned 31K Trade date Jan 21, 2026 Filed date Jan 21, 2026
Binder Gwendolyn Officer Buy $2.19 +11K +$25K 31K Jan 21, 2026 Jan 21, 2026
Tomasello Shawn · Director Buy +$50K
Price $2.21 Qty +23K Owned 23K Trade date Jan 21, 2026 Filed date Jan 21, 2026
Tomasello Shawn Director Buy $2.21 +23K +$50K 23K Jan 21, 2026 Jan 21, 2026
Gavel Steve · Officer Buy +$50K
Price $2.27 Qty +22K Owned 22K Trade date Jan 21, 2026 Filed date Jan 21, 2026
Gavel Steve Officer Buy $2.27 +22K +$50K 22K Jan 21, 2026 Jan 21, 2026
15 of 20
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Cabaletta Bio, Inc. (CABA) activist and large shareholders

What are Schedules 13D and 13G?

Dates
Owner/Filer identity Shares reported % of shares outstanding Filing date
Prudential Financial Inc 24.3M
% of shares outstanding 11.4% Filing date Jun 5, 2026
Prudential Financial Inc 24.3M 11.4% Jun 5, 2026
Jennison Associates LLC 24.3M
% of shares outstanding 11.4% Filing date Jun 4, 2026
Jennison Associates LLC 24.3M 11.4% Jun 4, 2026
T. Rowe Price Investment Management, Inc. 9.9M
% of shares outstanding 10.2% Filing date Feb 17, 2026
T. Rowe Price Investment Management, Inc. 9.9M 10.2% Feb 17, 2026
Bain Capital Life Sciences Opportunities Iii, LP 9.7M
% of shares outstanding 10.0% Filing date Aug 14, 2025
Bain Capital Life Sciences Opportunities Iii, LP 9.7M 10.0% Aug 14, 2025
Adage Capital Management, L.P. 9.0M
% of shares outstanding 10.0% Filing date Aug 12, 2025
Adage Capital Management, L.P. 9.0M 10.0% Aug 12, 2025
Cormorant Asset Management, LP 10.5M
% of shares outstanding 9.0% Filing date May 15, 2026
Cormorant Asset Management, LP 10.5M 9.0% May 15, 2026
Jennison Associates LLC 12.6M
% of shares outstanding 8.9% Filing date Nov 5, 2025
Jennison Associates LLC 12.6M 8.9% Nov 5, 2025
T. Rowe Price Investment Management, Inc. 3.7M
% of shares outstanding 7.5% Filing date Nov 14, 2024
T. Rowe Price Investment Management, Inc. 3.7M 7.5% Nov 14, 2024
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Cabaletta Bio, Inc. (CABA) ownership FAQ

Who owns CABA?

96 reporting institutions disclosed CABA position changes in the Q1 2026 snapshot.

How is institutional activity calculated?

For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.

What are activist and large shareholder filings?

An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.

Where does this data come from?

Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.

Why are ownership reports delayed?

Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.

How are missing table values shown?

A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.