CABA in the 13F filings

Cabaletta Bio Inc · CUSIP 12674W109

Sector · Pharmaceuticals and biotechnology Theme · Biological products Theme · Healthcare: biopharma and medtech· L3VLUP-defined

Quarter

Q2 2026 Q2 2024 Q1 2024 Q4 2023 Q3 2023 Q2 2023 Q3 2021

Quarter end: 31 Mar 2024; the date the book describes
Filed: 17 May 2024; latest of these filings; the earliest 13 May 2024
Managers listing it: 2; at least, of 95 tracked, among listed positions
Comparable managers: 93; filed both Q4 2023 and Q1 2024; 1 listed it in both
Shares listed: 577,476; combined, among listed positions
Reported value: $9.9m; combined, at the quarter end

Among the 93 comparable managers: 2 buyers (opened or added shares) and 1 seller (trimmed or exited), at least, among listed positions. Their net change in shares is not known from listed positions, because at least one of them lists it in only one of the two quarters.

Managers listing CABA in Q1 2024

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2023, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

ActionShare of book at least

2 of 2 holders

				Action		Filing
Artisan Partners LP	334,813	$5.7m	under 0.1%	New	new	13 May 2024 (the filing on sec.gov)
Woodline Partners LP	242,663	$4.1m	under 0.1%	Added	+1,210	15 May 2024 (the filing on sec.gov)

Largest increases and reductions, by shares

Q4 2023 to Q1 2024, among managers that listed it in both quarters or opened it.

Increases

Artisan Partners LPnew position · 334,813 shares now+334,813
Woodline Partners LPexisting position · 242,663 shares now+1,210

Reductions

No reduction among listed positions.

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (1)

Artisan Partners LP$5.7m

Exited (1)

Rokos Capital Management LLPwas $1.8m

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.

1 in Q3 2021 to 1 in Q2 2026

Tracked managers listing it, at least.

the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

CABA and GILD →CABA and AMGN →CABA and ARGX →Choose a stock to compare with CABA →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own CABA, latest filings →Back to the 13F Explorer →

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Quarter	Holders	Reported value	Buyers	Sellers
Q3 2021	1	$11m	n.a.	n.a.
Q2 2023	1	$2.3m	n.a.	n.a.
Q3 2023	3	$23m	n.a.	n.a.
Q4 2023	4	$57m	3	1
Q1 2024	2	$9.9m	2	1
Q2 2024	2	$4.3m	1	1
Q2 2026	1	$13m	10	13