Companies / Cabaletta Bio, Inc.

Cabaletta Bio, Inc.

Nasdaq: CABACIK 1759138PHILADELPHIA, PA

Financials

Revenue—
Net income$-167.86M
Total debt—
Cash$225.10M
Diluted EPS$-2.10
Shares outstanding169.5M

Ownership

169.5M shares outstanding · as of Aug 7, 2026
0.75%Insiders
Ownership
Insiders0.75%1,275,700
10%+ / strategic28.33%48,026,237
Institutions50.14%85,015,131
Public float20.78%35,228,377

% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.

Insiders 11

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Insider% of sharesShares
Nichtberger StevenCEOPresident & CEO · Director
0.61%1,031,483
Simon MarkDirector
0.09%147,205
Binder GwendolynPresident, Science & Tech.
0.02%31,312
Tomasello ShawnDirector
0.01%22,725
Gavel SteveChief Commercial Officer
0.01%22,170
Chang David J.Chief Medical Officer
<0.01%8,800
Gerard MichaelGeneral Counsel
<0.01%6,600
Bollard CatherineDirector
<0.01%5,405
Das ArunChief Business Officer
——
Henriques Richard C JrDirector
——

Institutional holders 104

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HolderValue% of shares
BlackRock, Inc.$33.45M6.34%
State Street Corporation$24.38M4.62%
Adage Capital Partners Gp, L.L.C.$23.75M5.21%
Bain Capital Life Sciences Investors, LLC$21.19M5.71%
Jennison Associates LLC$19.50M5.25%
Millennium Management LLC$15.88M3.48%
Vanguard Group Inc$9.68M2.61%
Cormorant Asset Management, LP$9.64M2.60%
Two Sigma Investments, LP$6.72M1.47%
Marshall Wace, LLP$5.86M1.29%

Activity

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InsidersInstitutions
What insiders are doing in this stock (Form 4).
DateActorActionSecurityValueShares ΔPosition afterImpact
Jan 21, 2026Nichtberger Steven
CEO
BuyCommon Stock$100.8K+45K
+4.56%
1,031,483
0.61% of shares
medium
Jan 21, 2026Tomasello Shawn
Director
BuyCommon Stock$50.3K+23K
22,725
0.01% of shares
low
Jan 21, 2026Gavel Steve
Executive
BuyCommon Stock$50.2K+22K
22,170
0.01% of shares
low
Jan 21, 2026Simon Mark
Director
BuyCommon Stock$25.3K+11K
+8.12%
147,205
0.09% of shares
low
Jan 21, 2026Binder Gwendolyn
Executive
BuyCommon Stock$24.8K+11K
+56.56%
31,312
0.02% of shares
low
Jan 21, 2026Chang David J.
Executive
BuyCommon Stock$19.9K+9K
8,800
<0.01% of shares
low
Jan 21, 2026Gerard Michael
Executive
BuyCommon Stock$15.0K+7K
6,600
<0.01% of shares
low
Jan 21, 2026Bollard Catherine
Director
BuyCommon Stock$10.0K+4K
+440.50%
5,405
<0.01% of shares
low

5%+ ownership events

Schedule 13D / 13G
FilerStance% of classSharesDate
Millennium Management LLCPassive13G———
Alyeska Investment Group, L.P.Passive13G/A—4,500,000—
Cormorant Asset Management, LPPassive13G/A—9,400,000—
T. Rowe Price Investment Management, Inc.Passive13G/A—9,858,257—
Prudential Financial IncPassive13G/A—24,267,980—

Securities

via CUSIP / OpenFIGI
SymbolTypeMarketCUSIPFIGI
CABA——12674W109—