SCHEDULE 13D/A

Dolby Laboratories Inc

Class A Common Stock · CUSIP: 25659T107

Event date: 2025-01-30

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• Dagmar DolbyReported CIK 0001537372

  Shares: 35,301,858 · Class: 36.6%

• Dagmar Dolby, as Trustee of the Marital Trust under the Dolby Family Trust Instrument dated May 7, 1999

  Shares: 24,108,162 · Class: 25%

• Dagmar Dolby, as Trustee of the Dagmar Dolby Trust under the Dolby Family Trust Instrument dated May 7, 1999Reported CIK 0001598813

  Shares: 8,572,117 · Class: 8.9%

• Dagmar Dolby, as Trustee of the Ray Dolby 2002 Trust A dated April 19, 2002Reported CIK 0001316241

  Shares: 160,592 · Class: 0.2%

• Dagmar Dolby, as Trustee of the Ray Dolby 2002 Trust B dated April 19, 2002

  Shares: 463,262 · Class: 0.5%

• Dolby Holdings II LLC

  Shares: 1,040,000 · Class: 1.1%

• Dolby Holdings III LLC

  Shares: 350,000 · Class: 0.4%

• Dagmar Dolby, as Trustee of the Dagmar Dolby 2016 Trust B dated March 23, 2016

  Shares: 403,600 · Class: 0.4%

• Thomas E. DolbyReported CIK 0001538127

  Shares: 680,592 · Class: 0.7%

• David E. DolbyReported CIK 0001511370

  Shares: 34,502,811 · Class: 35.8%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.