Reported relationships
Latest disclosed role at each company.
| Company | Last reported as | Report date | Published |
|---|---|---|---|
| Cabaletta Bio, Inc.CABA · Entity 5418 | Chief Business Officer | March 02, 2026 | March 03, 2026 |
Disclosed balances
About these balances
Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.
Cabaletta Bio, Inc.
Report date March 02, 2026 · Filed March 03, 2026
| Security / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $3.30 · Expires 2036-03-01 | Direct | 175,000 |
Reported balance
After 2026-03-02 transaction · row 1
Instrument identity requires review; Table II rows are not merged.
1 source rowRow 1 · 2026-03-02 · Grant · Acquired 175,000 · Balance 175,000 F1: 25% of the shares underlying this option shall vest and become exercisable on March 1, 2027, with the remainder vesting in twelve substantially equal quarterly installments thereafter, subject to the reporting person's continued service on each such vesting date. |
Filing footnotes · ownership attribution and instrument terms
F1: 25% of the shares underlying this option shall vest and become exercisable on March 1, 2027, with the remainder vesting in twelve substantially equal quarterly installments thereafter, subject to the reporting person's continued service on each such vesting date.
Transaction history
JSON APIPurchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”
The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.
| Transaction date | Company | Activity / security | Shares / units | Reported price | Reported value | Details |
|---|---|---|---|---|---|---|
| March 02, 2026 Filed Mar 3, 2026 00:28 UTC | Cabaletta Bio, Inc. CABA · Entity 5418 | GrantStock Option (Right to Buy) · Derivative | 175,000 | $0.00 Strike: $3.30 | $0.00 |
DisclosureSEC source: 0001193125-26-086145 · ownership.xml · derivative · entry 1 Das Arun · CIK 0001903997 · Chief Business Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 175,000 Underlying: Common Stock · 175,000 shares Expires 2036-03-01 F1 · derivative.exercise_date: 25% of the shares underlying this option shall vest and become exercisable on March 1, 2027, with the remainder vesting in twelve substantially equal quarterly installments thereafter, subject to the reporting person's continued service on each such vesting date. Read SEC document |
| May 19, 2025 Filed May 20, 2025 01:34 UTC | Cabaletta Bio, Inc. CABA · Entity 5418 | GrantStock Option (Right to Buy) · Derivative | 100,000 | $0.00 Strike: $1.92 | $0.00 |
DisclosureSEC source: 0000950170-25-074811 · ownership.xml · derivative · entry 10 Das Arun · CIK 0001903997 · Chief Business Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 100,000 Underlying: Common Stock · 100,000 shares Expires 2034-02-28 F3 · derivative.exercise_price: The exercise price of the option is $1.92 per share, representing the fair market value per share of the Issuer's Common Stock on the Repricing Date. Under the terms of the stock option award repricing, a repriced stock option award will revert to its original exercise price if exercised during the Retention Period. The "Retention Period", through which the Reporting Person must remain in service to the Issuer, commenced on the Repricing Date and ends upon the earliest of (i) the one-year anniversary of the Repricing Date, (ii) a Sale Event (as defined in the 2018 Plan and 2019 Plan, as applicable) and (iii) the termination of the Reporting Person's Service Relationship (as defined in the 2018 Plan and 2019 Plan, as applicable) due to the Reporting Person's death or disability. F1 · kind: On May 15, 2025, the Issuer's board of directors approved an option repricing (the "Repricing"), to be effective May 19, 2025 (the "Repricing Date"). All of the other terms of the options remain unchanged. Such transactions were exempt pursuant to Rule 16b-6(d) and Rule 16b-3 of the Exchange Act, as applicable. F2 · derivative.exercise_date: This stock option award was issued pursuant to the Cabaletta Bio, Inc. 2018 Stock Option and Incentive Plan, as amended (the "2018 Plan") or the Cabaletta Bio, Inc. 2019 Stock Option and Incentive Plan, as amended (the "2019 Plan"), as applicable, and becomes exercisable in accordance with the vesting schedule specified in the award agreement and as previously reported on applicable Form 4, subject to the Reporting Person's continued service with the Issuer as of the applicable vesting date. Read SEC document |
| May 19, 2025 Filed May 20, 2025 01:34 UTC | Cabaletta Bio, Inc. CABA · Entity 5418 | Disposition to issuerStock Option (Right to Buy) · Derivative | 100,000 | $0.00 Strike: $23.97 | $0.00 |
DisclosureSEC source: 0000950170-25-074811 · ownership.xml · derivative · entry 9 Das Arun · CIK 0001903997 · Chief Business Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 100,000 shares Expires 2034-02-28 F1 · kind: On May 15, 2025, the Issuer's board of directors approved an option repricing (the "Repricing"), to be effective May 19, 2025 (the "Repricing Date"). All of the other terms of the options remain unchanged. Such transactions were exempt pursuant to Rule 16b-6(d) and Rule 16b-3 of the Exchange Act, as applicable. F2 · derivative.exercise_date: This stock option award was issued pursuant to the Cabaletta Bio, Inc. 2018 Stock Option and Incentive Plan, as amended (the "2018 Plan") or the Cabaletta Bio, Inc. 2019 Stock Option and Incentive Plan, as amended (the "2019 Plan"), as applicable, and becomes exercisable in accordance with the vesting schedule specified in the award agreement and as previously reported on applicable Form 4, subject to the Reporting Person's continued service with the Issuer as of the applicable vesting date. Read SEC document |
| May 19, 2025 Filed May 20, 2025 01:34 UTC | Cabaletta Bio, Inc. CABA · Entity 5418 | GrantStock Option (Right to Buy) · Derivative | 150,000 | $0.00 Strike: $1.92 | $0.00 |
DisclosureSEC source: 0000950170-25-074811 · ownership.xml · derivative · entry 8 Das Arun · CIK 0001903997 · Chief Business Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 150,000 Underlying: Common Stock · 150,000 shares Expires 2033-01-17 F3 · derivative.exercise_price: The exercise price of the option is $1.92 per share, representing the fair market value per share of the Issuer's Common Stock on the Repricing Date. Under the terms of the stock option award repricing, a repriced stock option award will revert to its original exercise price if exercised during the Retention Period. The "Retention Period", through which the Reporting Person must remain in service to the Issuer, commenced on the Repricing Date and ends upon the earliest of (i) the one-year anniversary of the Repricing Date, (ii) a Sale Event (as defined in the 2018 Plan and 2019 Plan, as applicable) and (iii) the termination of the Reporting Person's Service Relationship (as defined in the 2018 Plan and 2019 Plan, as applicable) due to the Reporting Person's death or disability. F1 · kind: On May 15, 2025, the Issuer's board of directors approved an option repricing (the "Repricing"), to be effective May 19, 2025 (the "Repricing Date"). All of the other terms of the options remain unchanged. Such transactions were exempt pursuant to Rule 16b-6(d) and Rule 16b-3 of the Exchange Act, as applicable. F2 · derivative.exercise_date: This stock option award was issued pursuant to the Cabaletta Bio, Inc. 2018 Stock Option and Incentive Plan, as amended (the "2018 Plan") or the Cabaletta Bio, Inc. 2019 Stock Option and Incentive Plan, as amended (the "2019 Plan"), as applicable, and becomes exercisable in accordance with the vesting schedule specified in the award agreement and as previously reported on applicable Form 4, subject to the Reporting Person's continued service with the Issuer as of the applicable vesting date. Read SEC document |
| May 19, 2025 Filed May 20, 2025 01:34 UTC | Cabaletta Bio, Inc. CABA · Entity 5418 | Disposition to issuerStock Option (Right to Buy) · Derivative | 150,000 | $0.00 Strike: $11.09 | $0.00 |
DisclosureSEC source: 0000950170-25-074811 · ownership.xml · derivative · entry 7 Das Arun · CIK 0001903997 · Chief Business Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 150,000 shares Expires 2033-01-17 F1 · kind: On May 15, 2025, the Issuer's board of directors approved an option repricing (the "Repricing"), to be effective May 19, 2025 (the "Repricing Date"). All of the other terms of the options remain unchanged. Such transactions were exempt pursuant to Rule 16b-6(d) and Rule 16b-3 of the Exchange Act, as applicable. F2 · derivative.exercise_date: This stock option award was issued pursuant to the Cabaletta Bio, Inc. 2018 Stock Option and Incentive Plan, as amended (the "2018 Plan") or the Cabaletta Bio, Inc. 2019 Stock Option and Incentive Plan, as amended (the "2019 Plan"), as applicable, and becomes exercisable in accordance with the vesting schedule specified in the award agreement and as previously reported on applicable Form 4, subject to the Reporting Person's continued service with the Issuer as of the applicable vesting date. Read SEC document |
| May 19, 2025 Filed May 20, 2025 01:34 UTC | Cabaletta Bio, Inc. CABA · Entity 5418 | GrantStock Option (Right to Buy) · Derivative | 100,000 | $0.00 Strike: $1.92 | $0.00 |
DisclosureSEC source: 0000950170-25-074811 · ownership.xml · derivative · entry 6 Das Arun · CIK 0001903997 · Chief Business Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 100,000 Underlying: Common Stock · 100,000 shares Expires 2032-01-17 F3 · derivative.exercise_price: The exercise price of the option is $1.92 per share, representing the fair market value per share of the Issuer's Common Stock on the Repricing Date. Under the terms of the stock option award repricing, a repriced stock option award will revert to its original exercise price if exercised during the Retention Period. The "Retention Period", through which the Reporting Person must remain in service to the Issuer, commenced on the Repricing Date and ends upon the earliest of (i) the one-year anniversary of the Repricing Date, (ii) a Sale Event (as defined in the 2018 Plan and 2019 Plan, as applicable) and (iii) the termination of the Reporting Person's Service Relationship (as defined in the 2018 Plan and 2019 Plan, as applicable) due to the Reporting Person's death or disability. F1 · kind: On May 15, 2025, the Issuer's board of directors approved an option repricing (the "Repricing"), to be effective May 19, 2025 (the "Repricing Date"). All of the other terms of the options remain unchanged. Such transactions were exempt pursuant to Rule 16b-6(d) and Rule 16b-3 of the Exchange Act, as applicable. F2 · derivative.exercise_date: This stock option award was issued pursuant to the Cabaletta Bio, Inc. 2018 Stock Option and Incentive Plan, as amended (the "2018 Plan") or the Cabaletta Bio, Inc. 2019 Stock Option and Incentive Plan, as amended (the "2019 Plan"), as applicable, and becomes exercisable in accordance with the vesting schedule specified in the award agreement and as previously reported on applicable Form 4, subject to the Reporting Person's continued service with the Issuer as of the applicable vesting date. Read SEC document |
| May 19, 2025 Filed May 20, 2025 01:34 UTC | Cabaletta Bio, Inc. CABA · Entity 5418 | Disposition to issuerStock Option (Right to Buy) · Derivative | 100,000 | $0.00 Strike: $3.21 | $0.00 |
DisclosureSEC source: 0000950170-25-074811 · ownership.xml · derivative · entry 5 Das Arun · CIK 0001903997 · Chief Business Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 100,000 shares Expires 2032-01-17 F1 · kind: On May 15, 2025, the Issuer's board of directors approved an option repricing (the "Repricing"), to be effective May 19, 2025 (the "Repricing Date"). All of the other terms of the options remain unchanged. Such transactions were exempt pursuant to Rule 16b-6(d) and Rule 16b-3 of the Exchange Act, as applicable. F2 · derivative.exercise_date: This stock option award was issued pursuant to the Cabaletta Bio, Inc. 2018 Stock Option and Incentive Plan, as amended (the "2018 Plan") or the Cabaletta Bio, Inc. 2019 Stock Option and Incentive Plan, as amended (the "2019 Plan"), as applicable, and becomes exercisable in accordance with the vesting schedule specified in the award agreement and as previously reported on applicable Form 4, subject to the Reporting Person's continued service with the Issuer as of the applicable vesting date. Read SEC document |
| May 19, 2025 Filed May 20, 2025 01:34 UTC | Cabaletta Bio, Inc. CABA · Entity 5418 | GrantStock Option (Right to Buy) · Derivative | 35,000 | $0.00 Strike: $1.92 | $0.00 |
DisclosureSEC source: 0000950170-25-074811 · ownership.xml · derivative · entry 4 Das Arun · CIK 0001903997 · Chief Business Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 35,000 Underlying: Common Stock · 35,000 shares Expires 2031-02-28 F3 · derivative.exercise_price: The exercise price of the option is $1.92 per share, representing the fair market value per share of the Issuer's Common Stock on the Repricing Date. Under the terms of the stock option award repricing, a repriced stock option award will revert to its original exercise price if exercised during the Retention Period. The "Retention Period", through which the Reporting Person must remain in service to the Issuer, commenced on the Repricing Date and ends upon the earliest of (i) the one-year anniversary of the Repricing Date, (ii) a Sale Event (as defined in the 2018 Plan and 2019 Plan, as applicable) and (iii) the termination of the Reporting Person's Service Relationship (as defined in the 2018 Plan and 2019 Plan, as applicable) due to the Reporting Person's death or disability. F1 · kind: On May 15, 2025, the Issuer's board of directors approved an option repricing (the "Repricing"), to be effective May 19, 2025 (the "Repricing Date"). All of the other terms of the options remain unchanged. Such transactions were exempt pursuant to Rule 16b-6(d) and Rule 16b-3 of the Exchange Act, as applicable. F2 · derivative.exercise_date: This stock option award was issued pursuant to the Cabaletta Bio, Inc. 2018 Stock Option and Incentive Plan, as amended (the "2018 Plan") or the Cabaletta Bio, Inc. 2019 Stock Option and Incentive Plan, as amended (the "2019 Plan"), as applicable, and becomes exercisable in accordance with the vesting schedule specified in the award agreement and as previously reported on applicable Form 4, subject to the Reporting Person's continued service with the Issuer as of the applicable vesting date. Read SEC document |
| May 19, 2025 Filed May 20, 2025 01:34 UTC | Cabaletta Bio, Inc. CABA · Entity 5418 | Disposition to issuerStock Option (Right to Buy) · Derivative | 35,000 | $0.00 Strike: $11.47 | $0.00 |
DisclosureSEC source: 0000950170-25-074811 · ownership.xml · derivative · entry 3 Das Arun · CIK 0001903997 · Chief Business Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 35,000 shares Expires 2031-02-28 F1 · kind: On May 15, 2025, the Issuer's board of directors approved an option repricing (the "Repricing"), to be effective May 19, 2025 (the "Repricing Date"). All of the other terms of the options remain unchanged. Such transactions were exempt pursuant to Rule 16b-6(d) and Rule 16b-3 of the Exchange Act, as applicable. F2 · derivative.exercise_date: This stock option award was issued pursuant to the Cabaletta Bio, Inc. 2018 Stock Option and Incentive Plan, as amended (the "2018 Plan") or the Cabaletta Bio, Inc. 2019 Stock Option and Incentive Plan, as amended (the "2019 Plan"), as applicable, and becomes exercisable in accordance with the vesting schedule specified in the award agreement and as previously reported on applicable Form 4, subject to the Reporting Person's continued service with the Issuer as of the applicable vesting date. Read SEC document |
| May 19, 2025 Filed May 20, 2025 01:34 UTC | Cabaletta Bio, Inc. CABA · Entity 5418 | GrantStock Option (Right to Buy) · Derivative | 18,416 | $0.00 Strike: $1.92 | $0.00 |
DisclosureSEC source: 0000950170-25-074811 · ownership.xml · derivative · entry 2 Das Arun · CIK 0001903997 · Chief Business Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 18,416 Underlying: Common Stock · 18,416 shares Expires 2029-10-23 F3 · derivative.exercise_price: The exercise price of the option is $1.92 per share, representing the fair market value per share of the Issuer's Common Stock on the Repricing Date. Under the terms of the stock option award repricing, a repriced stock option award will revert to its original exercise price if exercised during the Retention Period. The "Retention Period", through which the Reporting Person must remain in service to the Issuer, commenced on the Repricing Date and ends upon the earliest of (i) the one-year anniversary of the Repricing Date, (ii) a Sale Event (as defined in the 2018 Plan and 2019 Plan, as applicable) and (iii) the termination of the Reporting Person's Service Relationship (as defined in the 2018 Plan and 2019 Plan, as applicable) due to the Reporting Person's death or disability. F1 · kind: On May 15, 2025, the Issuer's board of directors approved an option repricing (the "Repricing"), to be effective May 19, 2025 (the "Repricing Date"). All of the other terms of the options remain unchanged. Such transactions were exempt pursuant to Rule 16b-6(d) and Rule 16b-3 of the Exchange Act, as applicable. F2 · derivative.exercise_date: This stock option award was issued pursuant to the Cabaletta Bio, Inc. 2018 Stock Option and Incentive Plan, as amended (the "2018 Plan") or the Cabaletta Bio, Inc. 2019 Stock Option and Incentive Plan, as amended (the "2019 Plan"), as applicable, and becomes exercisable in accordance with the vesting schedule specified in the award agreement and as previously reported on applicable Form 4, subject to the Reporting Person's continued service with the Issuer as of the applicable vesting date. Read SEC document |
| May 19, 2025 Filed May 20, 2025 01:34 UTC | Cabaletta Bio, Inc. CABA · Entity 5418 | Disposition to issuerStock Option (Right to Buy) · Derivative | 18,416 | $0.00 Strike: $11.00 | $0.00 |
DisclosureSEC source: 0000950170-25-074811 · ownership.xml · derivative · entry 1 Das Arun · CIK 0001903997 · Chief Business Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 18,416 shares Expires 2029-10-23 F1 · kind: On May 15, 2025, the Issuer's board of directors approved an option repricing (the "Repricing"), to be effective May 19, 2025 (the "Repricing Date"). All of the other terms of the options remain unchanged. Such transactions were exempt pursuant to Rule 16b-6(d) and Rule 16b-3 of the Exchange Act, as applicable. F2 · derivative.exercise_date: This stock option award was issued pursuant to the Cabaletta Bio, Inc. 2018 Stock Option and Incentive Plan, as amended (the "2018 Plan") or the Cabaletta Bio, Inc. 2019 Stock Option and Incentive Plan, as amended (the "2019 Plan"), as applicable, and becomes exercisable in accordance with the vesting schedule specified in the award agreement and as previously reported on applicable Form 4, subject to the Reporting Person's continued service with the Issuer as of the applicable vesting date. Read SEC document |
| March 03, 2025 Filed Mar 4, 2025 21:48 UTC | Cabaletta Bio, Inc. CABA · Entity 5418 | GrantStock Option (Right to Buy) · Derivative | 115,000 | $0.00 Strike: $1.67 | $0.00 |
DisclosureSEC source: 0000950170-25-032299 · ownership.xml · derivative · entry 1 Das Arun · CIK 0001903997 · Chief Business Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 115,000 Underlying: Common Stock · 115,000 shares Expires 2035-03-02 F1 · derivative.exercise_date: 25% of the shares underlying this option shall vest and become exercisable on March 3, 2026, with the remainder vesting in twelve substantially equal quarterly installments thereafter, subject to the reporting person's continued service on each such vesting date. Read SEC document |
| March 01, 2024 Filed Mar 4, 2024 22:36 UTC | Cabaletta Bio, Inc. CABA · Entity 5418 | GrantStock Option (Right to Buy) · Derivative | 100,000 | $0.00 Strike: $23.97 | $0.00 |
DisclosureSEC source: 0000950170-24-025002 · ownership.xml · derivative · entry 1 Das Arun · CIK 0001903997 · Chief Business Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 100,000 Underlying: Common Stock · 100,000 shares Expires 2034-02-28 F1 · derivative.exercise_date: 25% of the shares underlying this option shall vest and become exercisable on March 1, 2025, with the remainder vesting in twelve substantially equal quarterly installments thereafter, subject to the reporting person's continued service on each such vesting date. Read SEC document |
| January 18, 2023 Filed Jan 28, 2023 01:51 UTC | Cabaletta Bio, Inc. CABA · Entity 5418 | GrantStock Option (Right to Buy) · Derivative | 150,000 | $0.00 Strike: $11.09 | $0.00 |
DisclosureSEC source: 0000899243-23-002912 · doc4.xml · derivative · entry 1 Das Arun · CIK 0001903997 · Chief Business Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 150,000 Underlying: Common Stock · 150,000 shares Expires 2033-01-17 F1 · derivative.exercise_date: 25% of the shares underlying this option shall vest and become exercisable on January 18, 2024, with the remainder vesting in twelve substantially equal quarterly installments thereafter, subject to the reporting person's continued service on each such vesting date. Read SEC document |
| January 18, 2022 Filed Jan 20, 2022 00:57 UTC | Cabaletta Bio, Inc. CABA · Entity 5418 | GrantStock Option (Right to Buy) · Derivative | 100,000 | $0.00 Strike: $3.21 | $0.00 |
DisclosureSEC source: 0000899243-22-002514 · doc4.xml · derivative · entry 1 Das Arun · CIK 0001903997 · Chief Business Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 100,000 Underlying: Common Stock · 100,000 shares Expires 2032-01-17 F1 · derivative.exercise_date: 25% of the shares underlying this option shall vest and become exercisable on January 18, 2023, with the remainder vesting in twelve substantially equal quarterly installments thereafter, subject to the reporting person's continued service on each such vesting date. Read SEC document |
Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.