$CABA

$1.35 -$0.12 (8.16%) Close

$CABA Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 169.5M shares outstanding

Who owns CABA?

By type of holder

Institutions 92.3% Insiders 1.0% Everyone else 6.7%

Concentration Top 10 holders own 60.5%

Jennison Associates LLC 11.8% · T. Rowe Price Investment Management, Inc. 11.1%

Institutional ownership

92.3%

+42.4 pts vs last qtr

Institutional holders

135

+27 vs last qtr

Net shares bought

+71.8M

by institutions in Q2 2026

New / sold out

51 / 24

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Jennison Associates LLC +11.1M
BlackRock, Inc. +8.4M

Biggest sellers in Q2 2026

Millennium Management LLC −3.8M
Two Sigma Investments, LP −1.1M

Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for Cabaletta Bio, Inc. in the last 12 months.

Is your stake being diluted?

There are not yet two fiscal years of reported share counts for Cabaletta Bio, Inc..

How patient are the owners?

Institutional shares by how long they've been held

5+ years29% 3–5 years28% 1–3 years25% Under 1 year18%

Quarterly turnover

54.0%

of institutional shares changed hands

Top 10 managers, median time held

3.3 years

Super Investors

Investment managers reporting CABA on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
JA Jennison Associates LLC	20.0M	11.82%	+11.1M (+123.3%)	2023	0.0%
Shares held by quarter Peak holding20.0M (Q2'26) Change over 8 quarters+14.4M Share of the company11.820% Jennison Associates LLC's full portfolio →
TR T. Rowe Price Investment Management, Inc.	18.9M	11.13%	+7.8M (+70.3%)	2023	0.0%
Shares held by quarter Peak holding18.9M (Q2'26) Change over 8 quarters+15.2M Share of the company11.130% T. Rowe Price Investment Management, Inc.'s full portfolio →

Jennison Associates LLC

20.0M

% of company

11.82%

Change vs last qtr

+11.1M (+123.3%)

Held since

2023

T. Rowe Price Investment Management, Inc.

18.9M

% of company

11.13%

Change vs last qtr

+7.8M (+70.3%)

Held since

2023

28 more super investors behind a free account

See every manager holding Cabaletta Bio, Inc., how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting CABA on Form N-PORT; together they hold 28.7% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
TR T. Rowe Price Small-Cap Value Fund, Inc. T. Rowe Price Small-Cap Value Fund, Inc.	$24.5M	7.9M	4.64%	0.23%	June 30, 2026
PJ PGIM Jennison Health Sciences Fund Prudential Sector Funds, Inc.	$18.8M	5.0M	2.93%	1.35%	May 29, 2026

T. Rowe Price Small-Cap Value Fund, Inc.

Position value

$24.5M

% of company

4.64%

% of the fund

0.23%

As of

June 30, 2026

PGIM Jennison Health Sciences Fund

Prudential Sector Funds, Inc.

Position value

$18.8M

% of company

2.93%

% of the fund

1.35%

As of

May 29, 2026

23 more funds behind a free account

See every fund holding Cabaletta Bio, Inc. and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
NS Nichtberger Steven Insider	1.4M	0.82%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.820% Nichtberger Steven's insider activity →
SM Simon Mark Insider	154.2K	0.09%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.090% Simon Mark's insider activity →

Nichtberger Steven

Insider

1.4M

% of company

0.82%

Change vs last qtr

—

Held since

—

Simon Mark

Insider

154.2K

% of company

0.09%

Change vs last qtr

—

Held since

—

6 more holders behind a free account

See every insider and 5%+ holder of Cabaletta Bio, Inc..

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