Cabaletta Bio, Inc. (CABA) Insider Ownership

Historic Insider Ownership Trends

Over the 90-day window ending February 07, 2026, Cabaletta Bio's three dominant insider ownership positions are held by President & Ceo Steven Nichtberger (1.03Mn shares), TenPercentOwner Ventures V, L.P. 5am (333.14K shares), Director Mark Simon (154.21K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares Report Date
Steven Nichtberger President & Ceo 1,031,483 21 Jan, 2026
Ventures V, L.P. 5am 333,144 03 Nov, 2021
Mark Simon 154,205 21 Jan, 2026
Anup Marda Chief Financial Officer 50,000 18 Oct, 2022
Gwendolyn Binder President And Science & Tech. 31,312 21 Jan, 2026
Shawn Tomasello 22,725 21 Jan, 2026
Steve Gavel Chief Commercial Officer 22,170 21 Jan, 2026
David J. Chang Chief Medical Officer 8,800 21 Jan, 2026
Michael Gerard General Counsel 6,600 21 Jan, 2026
Catherine Bollard 5,405 21 Jan, 2026

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
21 Jan, 2026 Mark Simon Common Stock A 11,061 $2.28 147,205 D P
21 Jan, 2026 Steven Nichtberger Common Stock A 45,000 $2.24 1,031,483 D P
21 Jan, 2026 Shawn Tomasello Common Stock A 22,725 $2.21 22,725 I P
21 Jan, 2026 Catherine Bollard Common Stock A 4,405 $2.27 5,405 D P
21 Jan, 2026 David J. Chang Common Stock A 8,800 $2.26 8,800 D P
21 Jan, 2026 Gwendolyn Binder Common Stock A 11,312 $2.19 31,312 D P
21 Jan, 2026 Michael Gerard Common Stock A 6,600 $2.27 6,600 D P
21 Jan, 2026 Steve Gavel Common Stock A 22,170 $2.26 22,170 D P
19 Jan, 2024 Gwendolyn Binder Common Stock A 11,000 $1.01 31,000 D M
19 Jan, 2024 Gwendolyn Binder Common Stock D 10,300 $19.54 20,700 D S
19 Jan, 2024 Gwendolyn Binder Common Stock D 700 $20.33 20,000 D S
19 Dec, 2023 Gwendolyn Binder Common Stock D 3,132 $22.22 20,000 D S
19 Dec, 2023 Gwendolyn Binder Common Stock A 11,000 $1.01 31,000 D M
19 Dec, 2023 Gwendolyn Binder Common Stock D 7,868 $21.76 23,132 D S
20 Nov, 2023 Gwendolyn Binder Common Stock D 7,458 $18.02 20,000 D S
20 Nov, 2023 Gwendolyn Binder Common Stock D 3,542 $17.39 27,458 D S
20 Nov, 2023 Gwendolyn Binder Common Stock A 11,000 $1.01 31,000 D M
19 Oct, 2023 Gwendolyn Binder Common Stock D 10,592 $13.32 20,408 D S
19 Oct, 2023 Gwendolyn Binder Common Stock D 408 $14.28 20,000 D S
19 Oct, 2023 Gwendolyn Binder Common Stock A 11,000 $1.01 31,000 D M