Quick Takeaways
- CABA - Cabaletta Bio, Inc. has 14 insiders with reported activity on this page.
- Net insider value flow over the last year: +$296,189.
- Recent transaction rows are available for direct filing-level review.
- Info
- Insider Trading
- Financials
- Holders
Insider Transactions Reported by 14 Insiders of Cabaletta Bio, Inc.
- Symbol
- CABA on Nasdaq
- Location
- Philadelphia, PA
What Changed
- Buy value: $296,189; sell value: $0.
- Net share flow: +132,073.
Why This Matters
- This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
- Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.
Official SEC Source
Insider trading overview
Last 12 monthsNet insider flow leans to buying over the last 12 months. Net value: +$296,189.
Buys
$296,189
Shares: 132,073
Insiders: 8
Sells
$0
Shares: 0
Insiders: 0
Net
+$296,189
Shares: +132,073
Insiders: 8
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 0-3 | 132,073 | 0 | $296,189 | $0 | +$296,189 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Cabaletta Bio, Inc. executives and other stock owners filed with the SEC include:
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| 5AM Ventures V, L.P. | 10%+ Owner | $6,771,685 | Mixed | 01 Nov 2021 | ||
| Nichtberger Steven | President & CEO, Director | $3,104,976 | +$100,778 | +3.4% | Mixed | 02 Mar 2026 |
| Mark Simon | Director | $351,516 | +$25,261 | +7.7% | Mixed | 21 Jan 2026 |
| Gwendolyn Binder | President, Science & Tech. | $68,545 | +$24,763 | +57% | Filing P/S | 02 Mar 2026 |
| Shawn Tomasello | Director | $50,322 | +$50,322 | +100% | Filing P/S | 21 Jan 2026 |
| Steve Gavel | Chief Commercial Officer | $50,215 | +$50,215 | +100% | Filing P/S | 21 Jan 2026 |
| David J. Chang | Chief Medical Officer | $19,887 | +$19,888 | +100% | Filing P/S | 02 Mar 2026 |
| Michael Gerard | General Counsel | $14,979 | +$14,979 | +100% | Filing P/S | 02 Mar 2026 |
| Catherine Bollard | Director | $12,248 | +$9,982 | +441% | Filing P/S | 21 Jan 2026 |
| Arun Das | Chief Business Officer | Mixed | 02 Mar 2026 | |||
| Brian Daniels | Director | Mixed | 01 Jun 2021 | |||
| Richard C. Henriques Jr. | Director | Mixed | 09 Jun 2025 | |||
| Anup Marda | Chief Financial Officer | Mixed | 02 Mar 2026 | |||
| Scott C. Brun | Director | Mixed | 09 Jun 2025 |
Top shareholders of Cabaletta Bio, Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| JENNISON ASSOCIATES LLC |
13D/G
13F
|
Company |
8.9%
|
12,584,537
|
$29,447,817 | +$5,797,046 | 30 Sep 2025 | |
| PRUDENTIAL FINANCIAL INC |
13D/G
|
— |
8.9%
|
12,584,537
|
$29,447,817 | +$5,132,486 | 30 Sep 2025 | |
| T. Rowe Price Investment Management, Inc. |
13F
13D/G
|
Company |
10%
from 13D/G
|
9,858,257
|
$21,590,000 | — | 31 Dec 2025 | |
| Bain Capital Life Sciences Investors, LLC |
13F
|
Company |
10%
|
9,677,125
|
$21,192,904 | — | 31 Dec 2025 | |
| Cormorant Asset Management, LP |
13D/G
13F
|
Company |
9.3%
|
9,400,000
|
$20,586,000 | -$420,443 | 31 Dec 2025 | |
| ADAGE CAPITAL PARTNERS GP, L.L.C. |
13F
|
Company |
9.1%
|
8,829,758
|
$19,337,170 | — | 31 Dec 2025 | |
| MILLENNIUM MANAGEMENT LLC |
13D/G
13F
|
Company |
5.3%
|
5,130,763
|
$15,494,904 | $0 | 11 Feb 2026 | |
| Bain Capital Life Sciences Opportunities III, LP |
13D/G
|
— |
10%
|
9,677,125
|
$15,483,400 | $0 | 30 Jun 2025 | |
| Adage Capital Management, L.P. |
13D/G
|
— |
10%
|
9,002,580
|
$14,404,128 | $0 | 30 Jun 2025 | |
| Alyeska Investment Group, L.P. |
13D/G
|
— |
4.7%
|
4,500,000
|
$9,855,000 | -$2,847,000 | 31 Dec 2025 | |
| VANGUARD GROUP INC |
13F
13D/G
|
Company · The Vanguard Group |
3.8%
from 13D/G
|
4,419,458
|
$9,678,613 | — | 31 Dec 2025 | |
| CITADEL ADVISORS LLC |
13D/G
13F
|
Kenneth Griffin · Company |
3.4%
|
3,150,275
|
$7,371,644 | -$3,903,787 | 30 Sep 2025 | |
| 5AM Ventures V, L.P. |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
333,144
|
$6,771,685 | — | 01 Nov 2021 | |
| BlackRock, Inc. |
13F
13D/G
|
Company |
1%
from 13D/G
|
2,328,470
|
$5,099,349 | — | 31 Dec 2025 | |
| SUPERSTRING CAPITAL MANAGEMENT LP |
13F
|
Company |
2.3%
|
2,253,550
|
$4,935,275 | — | 31 Dec 2025 | |
| Nichtberger Steven |
13D/G
3/4/5
|
President & CEO, Director |
3.3%
|
3,034,499
|
$4,855,198 | $0 | 30 Jun 2025 | |
| TWO SIGMA INVESTMENTS, LP |
13F
|
Company |
1.9%
|
1,839,799
|
$4,029,160 | — | 31 Dec 2025 | |
| RENAISSANCE TECHNOLOGIES LLC |
13F
|
Company |
1.6%
|
1,522,583
|
$3,334,457 | — | 31 Dec 2025 | |
| MORGAN STANLEY |
13F
|
Company |
1.4%
|
1,343,708
|
$2,942,720 | — | 31 Dec 2025 | |
| Woodline Partners LP |
13F
|
Company |
1.3%
|
1,250,242
|
$2,738,030 | — | 31 Dec 2025 | |
| Schonfeld Strategic Advisors LLC |
13F
|
Company |
1.2%
|
1,204,070
|
$2,636,910 | — | 31 Dec 2025 | |
| PRICE T ROWE ASSOCIATES INC /MD/ |
13F
|
Company |
1.1%
|
1,093,959
|
$2,397,000 | — | 31 Dec 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
1.1%
|
1,085,816
|
$2,378,961 | — | 31 Dec 2025 | |
| MARSHALL WACE, LLP |
13F
|
Company |
0.99%
|
959,076
|
$2,100,376 | — | 31 Dec 2025 | |
| Ikarian Capital, LLC |
13F
|
Company |
0.93%
|
900,000
|
$1,971,000 | — | 31 Dec 2025 | |
| Opaleye Management Inc. |
13F
|
Company |
0.93%
|
900,000
|
$1,971,000 | — | 31 Dec 2025 | |
| SCHRODER INVESTMENT MANAGEMENT GROUP |
13F
|
Company |
0.78%
|
756,637
|
$1,626,770 | — | 31 Dec 2025 | |
| TWO SIGMA ADVISERS, LP |
13F
|
Company |
0.76%
|
737,900
|
$1,616,001 | — | 31 Dec 2025 | |
| Burkehill Global Management, LP |
13F
|
Company |
0.72%
|
700,000
|
$1,533,000 | — | 31 Dec 2025 | |
| JANE STREET GROUP, LLC |
13F
|
Company |
0.68%
|
662,149
|
$1,450,107 | — | 31 Dec 2025 | |
| Ensign Peak Advisors, Inc |
13F
|
Company |
0.57%
|
550,000
|
$1,204,500 | — | 31 Dec 2025 | |
| KVP Capital Advisors, LP |
13F
|
Company |
0.52%
|
505,431
|
$1,106,894 | — | 31 Dec 2025 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
0.47%
|
452,039
|
$989,965 | — | 31 Dec 2025 | |
| Raiffeisen Bank International AG |
13F
|
Company |
0.46%
|
450,000
|
$967,500 | — | 31 Dec 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
0.44%
|
430,674
|
$943,176 | — | 31 Dec 2025 | |
| STATE STREET CORP |
13F
|
Company |
0.44%
|
425,478
|
$931,797 | — | 31 Dec 2025 | |
| UBS Group AG |
13F
|
Company |
0.43%
|
415,677
|
$910,333 | — | 31 Dec 2025 | |
| 683 Capital Management, LLC |
13F
|
Company |
0.4%
|
388,562
|
$850,951 | — | 31 Dec 2025 | |
| Almitas Capital LLC |
13F
|
Company |
0.4%
|
387,491
|
$848,605 | — | 31 Dec 2025 | |
| Qube Research & Technologies Ltd |
13F
|
Company |
0.34%
|
331,225
|
$725,383 | — | 31 Dec 2025 | |
| GSA CAPITAL PARTNERS LLP |
13F
|
Company |
0.31%
|
303,992
|
$666,000 | — | 31 Dec 2025 | |
| BOOTHBAY FUND MANAGEMENT, LLC |
13F
|
Company |
0.25%
|
243,445
|
$533,145 | — | 31 Dec 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.25%
|
238,442
|
$522,188 | — | 31 Dec 2025 | |
| BARCLAYS PLC |
13F
|
Company |
0.23%
|
220,696
|
$483,323 | — | 31 Dec 2025 | |
| Invesco Ltd. |
13F
|
Company |
0.2%
|
189,195
|
$414,337 | — | 31 Dec 2025 | |
| Stonepine Capital Management, LLC |
13F
|
Company |
0.18%
|
171,100
|
$374,709 | — | 31 Dec 2025 | |
| Mark Simon |
3/4/5
|
Director |
—
mixed-class rows
|
176,205
mixed-class rows
|
$351,516 | +$25,261 | 21 Jan 2026 | |
| XTX Topco Ltd |
13F
|
Company |
0.16%
|
155,387
|
$340,298 | — | 31 Dec 2025 | |
| Graham Capital Management, L.P. |
13F
|
Company |
0.16%
|
151,451
|
$331,678 | — | 31 Dec 2025 | |
| Squarepoint Ops LLC |
13F
|
Company |
0.15%
|
149,094
|
$326,516 | — | 31 Dec 2025 |
Recent Insider Transactions by Companies or Individuals for Cabaletta Bio, Inc.
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Arun Das | CABA | Stock Option (Right to Buy) | Award | 175,000 | 175,000 | 02 Mar 2026 | Direct | |||
| Michael Gerard | CABA | Stock Option (Right to Buy) | Award | 175,000 | 175,000 | 02 Mar 2026 | Direct | |||
| Gwendolyn Binder | CABA | Stock Option (Right to Buy) | Award | 225,000 | 225,000 | 02 Mar 2026 | Direct | |||
| David J. Chang | CABA | Stock Option (Right to Buy) | Award | 225,000 | 225,000 | 02 Mar 2026 | Direct | |||
| Steven Nichtberger | CABA | Stock Option (Right to Buy) | Award | 674,000 | 674,000 | 02 Mar 2026 | Direct | |||
| Anup Marda | CABA | Stock Option (Right to Buy) | Award | 225,000 | 225,000 | 02 Mar 2026 | Direct | |||
| David J. Chang | CABA | Common Stock | Purchase | $19,888 | $2.26 | 8,800 | 8,800 | 21 Jan 2026 | Direct | |
| Gwendolyn Binder | CABA | Common Stock | Purchase | 56.6% | $24,763 | $2.19 | 11,312 | 31,312 | 21 Jan 2026 | Direct |
| Shawn Tomasello | CABA | Common Stock | Purchase | $50,322 | $2.21 | 22,725 | 22,725 | 21 Jan 2026 | By Shawn Tomasello Consulting LLC | |
| Steve Gavel | CABA | Common Stock | Purchase | $50,215 | $2.26 | 22,170 | 22,170 | 21 Jan 2026 | Direct | |
| Catherine Bollard | CABA | Common Stock | Purchase | 440.5% | $9,982 | $2.27 | 4,405 | 5,405 | 21 Jan 2026 | Direct |
| Steven Nichtberger | CABA | Common Stock | Purchase | 4.56% | $100,778 | $2.24 | 45,000 | 1,031,483 | 21 Jan 2026 | Direct |
| Mark Simon | CABA | Common Stock | Purchase | 8.12% | $25,261 | $2.28 | 11,061 | 147,205 | 21 Jan 2026 | Direct |
| Michael Gerard | CABA | Common Stock | Purchase | $14,979 | $2.27 | 6,600 | 6,600 | 21 Jan 2026 | Direct | |
| Steve Gavel | CABA | Stock Option (Right to Buy) | Award | 275,000 | 275,000 | 13 Oct 2025 | Direct | |||
| Mark Simon | CABA | Stock Option (Right to Buy) | Award | 22,000 | 22,000 | 09 Jun 2025 | Direct | |||
| Scott C. Brun | CABA | Stock Option (Right to Buy) | Award | 22,000 | 22,000 | 09 Jun 2025 | Direct | |||
| Catherine Bollard | CABA | Stock Option (Right to Buy) | Award | 22,000 | 22,000 | 09 Jun 2025 | Direct | |||
| Shawn Tomasello | CABA | Stock Option (Right to Buy) | Award | 22,000 | 22,000 | 09 Jun 2025 | Direct | |||
| Richard C. Henriques Jr. | CABA | Stock Option (Right to Buy) | Award | 22,000 | 22,000 | 09 Jun 2025 | Direct | |||
| Scott C. Brun | CABA | Stock Option (Right to Buy) | Award | 88,000 | 44,000 | 19 May 2025 | Direct | |||
| Scott C. Brun | CABA | Stock Option (Right to Buy) | Disposed to Issuer | -100% | -88,000 | 0 | 19 May 2025 | Direct | ||
| Steven Nichtberger | CABA | Stock Option (Right to Buy) | Award | 1,877,814 | 411,600 | 19 May 2025 | Direct | |||
| Steven Nichtberger | CABA | Stock Option (Right to Buy) | Disposed to Issuer | -100% | -1,877,814 | 0 | 19 May 2025 | Direct | ||
| Michael Gerard | CABA | Stock Option (Right to Buy) | Award | 387,500 | 112,500 | 19 May 2025 | Direct | |||
| Michael Gerard | CABA | Stock Option (Right to Buy) | Disposed to Issuer | -100% | -387,500 | 0 | 19 May 2025 | Direct | ||
| Richard C. Henriques Jr. | CABA | Stock Option (Right to Buy) | Award | 112,428 | 46,428 | 19 May 2025 | Direct | |||
| Richard C. Henriques Jr. | CABA | Stock Option (Right to Buy) | Disposed to Issuer | -100% | -112,428 | 0 | 19 May 2025 | Direct | ||
| Shawn Tomasello | CABA | Stock Option (Right to Buy) | Award | 66,000 | 44,000 | 19 May 2025 | Direct | |||
| Shawn Tomasello | CABA | Stock Option (Right to Buy) | Disposed to Issuer | -100% | -66,000 | 0 | 19 May 2025 | Direct | ||
| Anup Marda | CABA | Stock Option (Right to Buy) | Award | 745,456 | 150,000 | 19 May 2025 | Direct | |||
| Anup Marda | CABA | Stock Option (Right to Buy) | Disposed to Issuer | -100% | -745,456 | 0 | 19 May 2025 | Direct | ||
| Mark Simon | CABA | Stock Option (Right to Buy) | Award | 84,460 | 22,000 | 19 May 2025 | Direct | |||
| Mark Simon | CABA | Stock Option (Right to Buy) | Disposed to Issuer | -100% | -84,460 | 0 | 19 May 2025 | Direct | ||
| Gwendolyn Binder | CABA | Stock Option (Right to Buy) | Award | 687,575 | 176,000 | 19 May 2025 | Direct | |||
| Gwendolyn Binder | CABA | Stock Option (Right to Buy) | Disposed to Issuer | -100% | -687,575 | 0 | 19 May 2025 | Direct | ||
| Arun Das | CABA | Stock Option (Right to Buy) | Award | 403,416 | 150,000 | 19 May 2025 | Direct | |||
| Arun Das | CABA | Stock Option (Right to Buy) | Disposed to Issuer | -100% | -403,416 | 0 | 19 May 2025 | Direct | ||
| Catherine Bollard | CABA | Stock Option (Right to Buy) | Award | 112,428 | 46,428 | 19 May 2025 | Direct | |||
| Catherine Bollard | CABA | Stock Option (Right to Buy) | Disposed to Issuer | -100% | -112,428 | 0 | 19 May 2025 | Direct | ||
| David J. Chang | CABA | Stock Option (Right to Buy) | Award | 801,283 | 185,709 | 19 May 2025 | Direct | |||
| David J. Chang | CABA | Stock Option (Right to Buy) | Disposed to Issuer | -100% | -801,283 | 0 | 19 May 2025 | Direct |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.