Key facts
- This page summarizes Dagmar Dolby's Form 4 filing for Dolby Laboratories, Inc. (DLB).
- 2 reported transactions and 30 derivative rows are listed below.
- Accepted by SEC: 02 Oct 2026, 18:42.
Dagmar Dolby - 02 Oct 2026 Form 4 Insider Report for Dolby Laboratories, Inc. (DLB)
- Reporting relationship
- 10%+ Owner
- Issuer ticker
- DLB
- Reported as of
- 02 Oct 2026
- Net transaction value
- $0
- SEC form
- 4
- Accepted by SEC
- 02 Oct 2026, 18:42:54 UTC
- Prior SEC filing
- 28 Aug 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/ Daniel Rodriguez, Attorney-in-Fact
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Filing notes and source
Key filing fact
Dagmar Dolby filed Form 4 for Dolby Laboratories, Inc. (DLB) on 02 Oct 2026.
Change
- Previous filing in this sequence was filed on 28 Aug 2026.
- Current net transaction value: $0.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (3)
CIK 0001537372
Primary reporting owner
Dolby Dagmar
- Relationship
- 10%+ Owner
- Address
- C/O DOLBY LABORATORIES, INC., 1275 MARKET STREET, SAN FRANCISCO
- Signature
- /s/ Daniel Rodriguez, Attorney-in-Fact
- Signature date
- 02 Oct 2026
CIK 0001598813
DAGMAR DOLBY TRUST UNDER DOLBY FAMILY TRUST INSTRUMENT DATED MAY 7, 1999
- Relationship
- 10%+ Owner
- Address
- C/O DOLBY LABORATORIES, INC., 1275 MARKET STREET, SAN FRANCISCO
- Signature
- /s/ Daniel Rodriguez, Attorney-in-Fact
- Signature date
- 02 Oct 2026
CIK 0001598817
MARITAL TRUST UNDER DOLBY FAMILY TRUST DATED MAY 7, 1999
- Relationship
- 10%+ Owner
- Address
- C/O DOLBY LABORATORIES, INC., 1275 MARKET STREET, SAN FRANCISCO
- Signature
- /s/ Daniel Rodriguez, Attorney-in-Fact
- Signature date
- 02 Oct 2026
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
DLB
transaction
Derivative
Class B Common Stock
Gift
- Transaction value
- Shares
- -24,108,162
- Change %
- -100%
- Price
- $0.000000*
- Shares after
- 0
- Date
- 02 Oct 2026
- Ownership
- By a trust
- Underlying class
- Class A Common Stock
- Underlying amount
- 24,108,162
- Exercise price
- Footnotes
- F1, F2, F3
DLB
transaction
Derivative
Class B Common Stock
Gift
- Transaction value
- Shares
- -24,108,162
- Change %
- -100%
- Price
- $0.000000*
- Shares after
- 0
- Date
- 02 Oct 2026
- Ownership
- By a trust
- Underlying class
- Class A Common Stock
- Underlying amount
- 24,108,162
- Exercise price
- Footnotes
- F1, F2, F3
DLB
transaction
Derivative
Class B Common Stock
Gift
- Transaction value
- Shares
- -24,108,162
- Change %
- -100%
- Price
- $0.000000*
- Shares after
- 0
- Date
- 02 Oct 2026
- Ownership
- By a trust
- Underlying class
- Class A Common Stock
- Underlying amount
- 24,108,162
- Exercise price
- Footnotes
- F1, F2, F3
DLB
transaction
Derivative
Class B Common Stock
Gift
- Transaction value
- Shares
- +24,108,162
- Change %
- +551%
- Price
- $0.000000*
- Shares after
- 28,480,279
- Date
- 02 Oct 2026
- Ownership
- By a trust
- Underlying class
- Class A Common Stock
- Underlying amount
- 24,108,162
- Exercise price
- Footnotes
- F1, F2, F4
DLB
transaction
Derivative
Class B Common Stock
Gift
- Transaction value
- Shares
- +24,108,162
- Change %
- +551%
- Price
- $0.000000*
- Shares after
- 28,480,279
- Date
- 02 Oct 2026
- Ownership
- By a trust
- Underlying class
- Class A Common Stock
- Underlying amount
- 24,108,162
- Exercise price
- Footnotes
- F1, F2, F4
DLB
transaction
Derivative
Class B Common Stock
Gift
- Transaction value
- Shares
- +24,108,162
- Change %
- +551%
- Price
- $0.000000*
- Shares after
- 28,480,279
- Date
- 02 Oct 2026
- Ownership
- By a trust
- Underlying class
- Class A Common Stock
- Underlying amount
- 24,108,162
- Exercise price
- Footnotes
- F1, F2, F4
DLB
holding
Derivative
Class B Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 160,592
- Date
- 02 Oct 2026
- Ownership
- By Trust
- Underlying class
- Class A Common Stock
- Underlying amount
- Exercise price
- Footnotes
- F1, F5
DLB
holding
Derivative
Class B Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 160,592
- Date
- 02 Oct 2026
- Ownership
- By Trust
- Underlying class
- Class A Common Stock
- Underlying amount
- Exercise price
- Footnotes
- F1, F5
DLB
holding
Derivative
Class B Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 160,592
- Date
- 02 Oct 2026
- Ownership
- By Trust
- Underlying class
- Class A Common Stock
- Underlying amount
- Exercise price
- Footnotes
- F1, F5
DLB
holding
Derivative
Class B Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 463,262
- Date
- 02 Oct 2026
- Ownership
- By Trust
- Underlying class
- Class A Common Stock
- Underlying amount
- Exercise price
- Footnotes
- F1, F6
DLB
holding
Derivative
Class B Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 463,262
- Date
- 02 Oct 2026
- Ownership
- By Trust
- Underlying class
- Class A Common Stock
- Underlying amount
- Exercise price
- Footnotes
- F1, F6
DLB
holding
Derivative
Class B Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 463,262
- Date
- 02 Oct 2026
- Ownership
- By Trust
- Underlying class
- Class A Common Stock
- Underlying amount
- Exercise price
- Footnotes
- F1, F6
DLB
holding
Derivative
Class B Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 403,600
- Date
- 02 Oct 2026
- Ownership
- By Trust
- Underlying class
- Class A Common Stock
- Underlying amount
- Exercise price
- Footnotes
- F1, F7
DLB
holding
Derivative
Class B Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 403,600
- Date
- 02 Oct 2026
- Ownership
- By Trust
- Underlying class
- Class A Common Stock
- Underlying amount
- Exercise price
- Footnotes
- F1, F7
DLB
holding
Derivative
Class B Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 403,600
- Date
- 02 Oct 2026
- Ownership
- By Trust
- Underlying class
- Class A Common Stock
- Underlying amount
- Exercise price
- Footnotes
- F1, F7
DLB
holding
Derivative
Class B Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 1,040,000
- Date
- 02 Oct 2026
- Ownership
- By LLC
- Underlying class
- Class A Common Stock
- Underlying amount
- Exercise price
- Footnotes
- F1, F8
DLB
holding
Derivative
Class B Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 1,040,000
- Date
- 02 Oct 2026
- Ownership
- By LLC
- Underlying class
- Class A Common Stock
- Underlying amount
- Exercise price
- Footnotes
- F1, F8
DLB
holding
Derivative
Class B Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 1,040,000
- Date
- 02 Oct 2026
- Ownership
- By LLC
- Underlying class
- Class A Common Stock
- Underlying amount
- Exercise price
- Footnotes
- F1, F8
DLB
holding
Derivative
Class B Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 350,000
- Date
- 02 Oct 2026
- Ownership
- By LLC
- Underlying class
- Class A Common Stock
- Underlying amount
- Exercise price
- Footnotes
- F1, F9
DLB
holding
Derivative
Class B Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 350,000
- Date
- 02 Oct 2026
- Ownership
- By LLC
- Underlying class
- Class A Common Stock
- Underlying amount
- Exercise price
- Footnotes
- F1, F9
DLB
holding
Derivative
Class B Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 350,000
- Date
- 02 Oct 2026
- Ownership
- By LLC
- Underlying class
- Class A Common Stock
- Underlying amount
- Exercise price
- Footnotes
- F1, F9
DLB
holding
Derivative
Class B Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 1,000,000
- Date
- 02 Oct 2026
- Ownership
- By Trust
- Underlying class
- Class A Common Stock
- Underlying amount
- Exercise price
- Footnotes
- F1, F10
DLB
holding
Derivative
Class B Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 1,000,000
- Date
- 02 Oct 2026
- Ownership
- By Trust
- Underlying class
- Class A Common Stock
- Underlying amount
- Exercise price
- Footnotes
- F1, F10
DLB
holding
Derivative
Class B Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 1,000,000
- Date
- 02 Oct 2026
- Ownership
- By Trust
- Underlying class
- Class A Common Stock
- Underlying amount
- Exercise price
- Footnotes
- F1, F10
DLB
holding
Derivative
Class B Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 1,000,000
- Date
- 02 Oct 2026
- Ownership
- By Trust
- Underlying class
- Class A Common Stock
- Underlying amount
- Exercise price
- Footnotes
- F1, F11
DLB
holding
Derivative
Class B Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 1,000,000
- Date
- 02 Oct 2026
- Ownership
- By Trust
- Underlying class
- Class A Common Stock
- Underlying amount
- Exercise price
- Footnotes
- F1, F11
DLB
holding
Derivative
Class B Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 1,000,000
- Date
- 02 Oct 2026
- Ownership
- By Trust
- Underlying class
- Class A Common Stock
- Underlying amount
- Exercise price
- Footnotes
- F1, F11
DLB
holding
Derivative
Class B Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 1,000,000
- Date
- 02 Oct 2026
- Ownership
- By Trust
- Underlying class
- Class A Common Stock
- Underlying amount
- Exercise price
- Footnotes
- F1, F12
DLB
holding
Derivative
Class B Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 1,000,000
- Date
- 02 Oct 2026
- Ownership
- By Trust
- Underlying class
- Class A Common Stock
- Underlying amount
- Exercise price
- Footnotes
- F1, F12
DLB
holding
Derivative
Class B Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 1,000,000
- Date
- 02 Oct 2026
- Ownership
- By Trust
- Underlying class
- Class A Common Stock
- Underlying amount
- Exercise price
- Footnotes
- F1, F12
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 12 footnotes
Footnote F1
Shares of Class B Common Stock are convertible, at no cost, at any time at the election of the holder into shares of Class A Common Stock on a 1-for-1 basis.
Footnote F2
On October 2, 2026, the Marital Trust (as defined below) transferred 24,108,162 shares of Class B Common Stock to the Dagmar Dolby Trust (as defined below). Such share transfer was effected solely for tax and estate planning purposes, and was a transfer for no value without the payment or receipt of any funds or other consideration by any reporting person in exchange therefor. As a change in form of indirect beneficial ownership only, the share transfer would be exempt from the reporting requirements of Section 16(a) and the provisions of Section 16(b) of the Act. The reporting persons are voluntarily reporting the share transfer on this Form 4.
Footnote F3
Reflects shares of Class B Common Stock held of record by Dagmar Dolby as the Trustee of the Marital Trust under the Dolby Family Trust instrument, dated May 7, 1999 (the "Marital Trust"), voting power of which is shared by the Trustee and David E. Dolby as Special Trustee of the Marital Trust. This report is filed jointly by Dagmar Dolby and the Marital Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust.The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.
Footnote F4
Reflects shares held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby Trust under the Dolby Family Trust Instrument, dated May 7, 1999 (the "Dagmar Dolby Trust"), voting power of which is shared by the Trustee and David E. Dolby, son of Dagmar Dolby, as Special Trustee of the Dagmar Dolby Trust. This report is filed jointly by Dagmar Dolby and the Dagmar Dolby Trust with respect to the securities held and transactions effected by the Dagmar Dolby Trust. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.
Footnote F5
Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Ray Dolby 2002 Trust A, dated April 19, 2002 (the "Ray Dolby 2002 Trust A"), voting power of which is held by Thomas E. Dolby, son of Dagmar Dolby, as Special Trustee of the Ray Dolby 2002 Trust A. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.
Footnote F6
Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Ray Dolby 2002 Trust B, dated April 19, 2002 (the "Ray Dolby 2002 Trust B"), voting power of which is held by David E. Dolby, as Special Trustee of the Ray Dolby 2002 Trust B. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.
Footnote F7
Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby 2016 Trust B, dated March 23, 2016 (the "Dagmar Dolby 2016 Trust B"), voting power of which is held by David E. Dolby as Special Trustee of the Dagmar Dolby 2016 Trust B. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.
Footnote F8
Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dolby Holdings II LLC, a limited liability company ("Dolby Holdings II"), investment power over which is held by Dagmar Dolby, manager of Dolby Holdings II, and voting power over which is held by (i) Thomas E. Dolby, a Special Manager of Dolby Holdings II, with respect to 50% of such shares, and (ii) David E. Dolby, a Special Manager of Dolby Holdings II, with respect to 50% of such shares. This report is filed by Dagmar Dolby with respect to the securities held by Dolby Holdings II. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein
Footnote F9
Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dolby Holdings III LLC, a limited liability company ("Dolby Holdings III"), investment power over which is held by Dagmar Dolby, the manager of Dolby Holdings III, and voting power over which is held by David E. Dolby, the Special Manager of Dolby Holdings III. This report is filed by Dagmar Dolby with respect to the securities held by Dolby Holdings III. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.
Footnote F10
Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby 2026 Trust AA, dated February 25, 2026 (the "Dagmar Dolby 2026 Trust AA"), voting power over which is held by David E. Dolby as Special Trustee of the Dagmar Dolby 2026 Trust AA. This report is filed by Dagmar Dolby with respect to the securities held by the Dagmar Dolby 2026 Trust AA. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.
Footnote F11
Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby 2026 Trust AA-2, dated August 25, 2026 (the "Dagmar Dolby 2026 Trust AA-2"), voting power over which is held by David E. Dolby as Special Trustee of the Dagmar Dolby 2026 Trust AA-2. This report is filed by Dagmar Dolby with respect to the securities held by the Dagmar Dolby 2026 Trust AA-2. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.
Footnote F12
Reflects shares of Class B Common Stock (convertible into a like number of shares of Class A Common Stock) held of record by Dagmar Dolby as the Trustee of the Dagmar Dolby 2026 Trust BB, dated August 25, 2026 (the "Dagmar Dolby 2026 Trust BB"), voting power over which is held by David E. Dolby as Special Trustee of the Dagmar Dolby 2026 Trust BB. This report is filed by Dagmar Dolby with respect to the securities held by the Dagmar Dolby 2026 Trust BB. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein.