STOCK TITAN
  1. Home
  2. Sec-filings
  3. CABA
  4. [Form 4] Cabaletta Bio, Inc. Insider Trading Activity

22,000 options granted to Cabaletta Bio (CABA) director Brun

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Cabaletta Bio director Scott C. Brun received a grant of stock options covering 22,000 shares of common stock. The options have an exercise price of $3.22 per share and expire on June 8, 2036. They vest in full on the earlier of June 9, 2027 or the date of the company’s next annual stockholder meeting. Following this award, Brun holds stock options for 22,000 shares. This is a compensation-related grant, not an open-market purchase or sale of shares.

Positive

  • None.

Negative

  • None.
Insider Brun Scott C.
Role null
Type Security Shares Price Value
Grant/Award Stock Option (Right to Buy) 22,000 $0.00 --
Holdings After Transaction: Stock Option (Right to Buy) — 22,000 shares (Direct, null)
Footnotes (1)
  1. [object Object]
Options granted 22,000 options Stock Option (Right to Buy) grant to director
Exercise price $3.22 per share Conversion or exercise price of stock options
Expiration date June 8, 2036 Option term end
Vesting date trigger June 9, 2027 Earlier of this date or next annual meeting
Underlying shares 22,000 shares Common stock subject to the option
Post-grant option holdings 22,000 options Total options following transaction
Stock Option (Right to Buy) financial
"security_title: Stock Option (Right to Buy)"
grant/award acquisition financial
"transaction_action: grant/award acquisition"
expiration date financial
"expiration_date: 2036-06-08T00:00:00.000Z"
The expiration date is the deadline after which a financial contract, such as an option or a futures agreement, is no longer valid or can be exercised. It matters to investors because it determines the timeframe during which they can take action or benefit from the contract, similar to how a coupon or a food item has a limited period of usefulness. Once the expiration date passes, the contract loses its value or ability to be used.
underlying security financial
"underlying_security_title: Common Stock"
See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google
Add on Google
Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Brun Scott C.
(Last)(First)(Middle)
C/O CABALETTA BIO, INC.
2929 ARCH STREET, SUITE 600
(Street)
PHILADELPHIA PENNSYLVANIA 19104
(City)(State)(Zip)
UNITED STATES
(Country)		2. Issuer Name and Ticker or Trading Symbol
Cabaletta Bio, Inc. [ CABA ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/09/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Option (Right to Buy)$3.2206/09/2026A22,000 (1)06/08/2036Common Stock22,000$022,000D
Explanation of Responses:
1. This option shall vest in full upon the earlier of (i) June 9, 2027 or (ii) the date of the next annual meeting of the Corporation's stockholders.
/s/ Michael Gerard, Attorney-in-Fact06/10/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR

FAQ

What did Cabaletta Bio (CABA) report in this Form 4 filing?

Cabaletta Bio reported a stock option grant to director Scott C. Brun. He received options for 22,000 shares of common stock as a compensation-related award, rather than buying or selling shares on the open market.

How many Cabaletta Bio (CABA) stock options were granted to Scott C. Brun?

Scott C. Brun was granted stock options for 22,000 shares of Cabaletta Bio common stock. These options give him the right to buy shares at a fixed exercise price if the options vest and he chooses to exercise them.

What is the exercise price of the Cabaletta Bio (CABA) options granted to Scott C. Brun?

The options granted to Scott C. Brun have an exercise price of $3.22 per share. This means he can purchase Cabaletta Bio common stock at $3.22 per share if the options vest and he exercises them before they expire.

When do Scott C. Brun’s Cabaletta Bio (CABA) stock options vest?

Scott C. Brun’s options vest in full on the earlier of June 9, 2027 or the date of Cabaletta Bio’s next annual stockholder meeting. Vested options can then be exercised to buy common shares at the set exercise price.

When do the Cabaletta Bio (CABA) stock options granted to Scott C. Brun expire?

The stock options granted to Scott C. Brun expire on June 8, 2036. If he does not exercise the options by that expiration date after they vest, his right to buy Cabaletta Bio shares under this grant will lapse.

Is this Cabaletta Bio (CABA) Form 4 an open-market purchase or sale?

No, this Form 4 reflects a compensation-related grant of stock options to director Scott C. Brun. It does not involve Cabaletta Bio shares being bought or sold on the open market, but rather an award of derivative securities.