Cabaletta Bio CABA Insider Ownership

NASDAQ CABA
$1.98 -0.02 (-1.00%)
At close: Sep 29, 2026 · 4:00 PM EDT

Insider Holdings by Owner

1.66Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026
Insider Ownership
1.10%
■0% pp QoQ
Shares Held by Insiders
1.67Mn
filed for Sep 2026
■0.00% QoQ
Shares Outstanding
151.16Mn
151,160,280 shares
Direct Holdings
1.30Mn
Indirect: 362.87K
Net Shares Traded (QoQ)
0
no net change in Sep 2026
Insiders Holding Shares
10
with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding
Latest —
Average ownership —
Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold
Latest quarter —
Net over range —
Buying quarters —

Insider Ownership Summary

Quarter ending 30 Sep, 2026

Cabaletta Bio's top three insider shareholders as of September 29, 2026 are Steven Nichtberger (President Ceo, 1.03Mn shares), Ventures V, L.P. 5Am (TenPercentOwner, 333.14K shares), Mark Simon (Director, 147.21K shares).

Form 4 Holdings

Insiders Holding CABA

Insiders 10
Shares held 1.66Mn
Of outstanding 1.10%
# Insider Position Direct Indirect Total Share of Insiders Last Filed
1 Steven Nichtberger President Ceo 1,031,483 0 1,031,483 62.2% 21 Jan, 2026
2 Ventures V, L.P. 5Am TenPercentOwner 0 333,144 333,144 20.1% 03 Nov, 2021
3 Mark Simon Director 147,205 0 147,205 8.9% 21 Jan, 2026
4 Anup Marda Chief Financial Officer 50,000 0 50,000 3.0% 18 Oct, 2022
5 Gwendolyn Binder President, Science Tech. 31,312 0 31,312 1.9% 21 Jan, 2026
6 Shawn Tomasello Director 0 22,725 22,725 1.4% 21 Jan, 2026
7 Steve Gavel Chief Commercial Officer 22,170 0 22,170 1.3% 21 Jan, 2026
8 David J. Chang Chief Medical Officer 8,800 0 8,800 0.5% 21 Jan, 2026
9 Michael Gerard General Counsel 6,600 0 6,600 0.4% 21 Jan, 2026
10 Catherine Bollard Director 5,405 0 5,405 0.3% 21 Jan, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

256 Insider Transactions

Source SEC Form 4
Latest quarter Sep 2026
Download Data
Date Insider Position Transaction Shares Price Value Shares Held After Ownership
09 Jun, 2026 Scott C. Brun Director Acquired A 22,000 $0.00 $0 22,000 Direct
09 Jun, 2026 Richard C Jr Henriques Director Acquired A 22,000 $0.00 $0 22,000 Direct
09 Jun, 2026 Shawn Tomasello Director Acquired A 22,000 $0.00 $0 22,000 Direct
09 Jun, 2026 Mark Simon Director Acquired A 22,000 $0.00 $0 22,000 Direct
09 Jun, 2026 Catherine Bollard Director Acquired A 22,000 $0.00 $0 22,000 Direct
02 Mar, 2026 Anup Marda Chief Financial Officer Acquired A 225,000 $0.00 $0 225,000 Direct
02 Mar, 2026 Arun Das Chief Business Officer Acquired A 175,000 $0.00 $0 175,000 Direct
02 Mar, 2026 Steven Nichtberger President Ceo Acquired A 674,000 $0.00 $0 674,000 Direct
02 Mar, 2026 David J. Chang Chief Medical Officer Acquired A 225,000 $0.00 $0 225,000 Direct
02 Mar, 2026 Gwendolyn Binder President, Science Tech. Acquired A 225,000 $0.00 $0 225,000 Direct
02 Mar, 2026 Michael Gerard General Counsel Acquired A 175,000 $0.00 $0 175,000 Direct
21 Jan, 2026 Michael Gerard General Counsel Acquired P 6,600 $2.27 $14.98K 6,600 Direct
21 Jan, 2026 Mark Simon Director Acquired P 11,061 $2.28 $25.26K 147,205 Direct
21 Jan, 2026 David J. Chang Chief Medical Officer Acquired P 8,800 $2.26 $19.89K 8,800 Direct
21 Jan, 2026 Steven Nichtberger President Ceo Acquired P 45,000 $2.24 $100.78K 1,031,483 Direct
21 Jan, 2026 Gwendolyn Binder President, Science Tech. Acquired P 11,312 $2.19 $24.76K 31,312 Direct
21 Jan, 2026 Catherine Bollard Director Acquired P 4,405 $2.27 $9.98K 5,405 Direct
21 Jan, 2026 Steve Gavel Chief Commercial Officer Acquired P 22,170 $2.27 $50.22K 22,170 Direct
21 Jan, 2026 Shawn Tomasello Director Acquired P 22,725 $2.21 $50.32K 22,725 Indirect
13 Oct, 2025 Steve Gavel Chief Commercial Officer Acquired A 275,000 $0.00 $0 275,000 Direct