ドルビーラボラトリーズ株式会社
US ˙ NYSE ˙ US25659T1079

SecurityDLB / Dolby Laboratories, Inc.
InstitutionRhumbline Advisers
Latest Disclosed Ownership260,172 shares
Latest Disclosed Value $ 15,625,878
Rhumbline Advisers reports 10.56% increase in ownership of DLB / Dolby Laboratories, Inc.

On May 12, 2026 - Rhumbline Advisers filed a 13F-HR form disclosing ownership of 260,172 shares of Dolby Laboratories, Inc. (US:DLB) valued at $15,625,930 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 235,313 shares of Dolby Laboratories, Inc.. This represents a change in shares of 10.56% during the quarter. The current value of the position is $13,992,050 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-12 2026-03-31 13F DOLBY LABORATORIES INC CL A COM STK COM 25659T107 260,172 24,859 10.56 15,626 3.40 0.0134
2026-02-13 2025-12-31 13F DOLBY LABORATORIES INC CL A COM STK COM 25659T107 235,313 -4,659 -1.94 15,112 -12.99 0.0122
2025-11-06 2025-09-30 13F DOLBY LABORATORIES INC CL A COM STK COM 25659T107 239,972 -36,562 -13.22 17,367 -15.43 0.0139
2025-08-12 2025-06-30 13F DOLBY LABORATORIES INC CL A COM STK COM 25659T107 276,534 867 0.31 20,535 -7.24 0.0176
2025-05-29 2025-03-31 13F/A-1 DOLBY LABORATORIES INC CL A COM STK COM 25659T107 275,667 25,546 10.21 22,139 13.33 0.0207
2025-04-08 2025-03-31 13F DOLBY LABORATORIES INC CL A COM STK COM 25659T107 275,667 25,546 22,139 0.0207
2025-05-29 2024-12-31 13F/A-1 DOLBY LABORATORIES INC CL A COM STK COM 25659T107 250,121 1,194 0.48 19,534 2.54 0.0175
2025-01-30 2024-12-31 13F DOLBY LABORATORIES INC CL A COM STK COM 25659T107 250,121 1,194 19,534 0.0175
2024-11-12 2024-09-30 13F DOLBY LABORATORIES INC CL A COM STK COM 25659T107 248,927 22,319 9.85 19,050 6.10 0.0172
2024-08-01 2024-06-30 13F DOLBY LABORATORIES INC CL A COM STK COM 25659T107 226,608 -8,223 -3.50 17,954 -8.73 0.0169
2024-05-09 2024-03-31 13F DOLBY LABORATORIES INC CL A COM STK COM 25659T107 234,831 -19,983 -7.84 19,672 -10.42 0.0189
2024-02-08 2023-12-31 13F DOLBY LABORATORIES INC CL A COM STK COM 25659T107 254,814 -8,508 -3.23 21,960 5.22 0.0230
2023-11-09 2023-09-30 13F DOLBY LABORATORIES INC CL A COM STK COM 25659T107 263,322 127,408 93.74 20,871 83.50 0.0242
2023-08-08 2023-06-30 13F DOLBY LABORATORIES INC CL A COM STK COM 25659T107 135,914 6,896 5.34 11,373 103,290.91 0.0127
2023-05-11 2023-03-31 13F DOLBY LABORATORIES INC CL A COM 25659T107 129,018 42,698 49.46 11 -99.82 0.0136
2023-02-14 2022-12-31 13F DOLBY LABORATORIES INC CL A COM 25659T107 86,320 4,169 5.07 6,089 13.77 0.0082
2022-11-10 2022-09-30 13F DOLBY LABORATORIES INC CL A COM 25659T107 82,151 4,894 6.33 5,352 -3.20 0.0080
2022-08-11 2022-06-30 13F DOLBY LABORATORIES INC CL A COM 25659T107 77,257 7,802 11.23 5,529 1.77 0.0081
2022-05-12 2022-03-31 13F DOLBY LABORATORIES INC CL A COM 25659T107 69,455 -43,436 -38.48 5,433 -49.46 0.0070
2022-02-10 2021-12-31 13F DOLBY LABORATORIES INC CL A COM 25659T107 112,891 799 0.71 10,749 8.97 0.0132
2021-11-12 2021-09-30 13F DOLBY LABORATORIES INC CL A COM 25659T107 112,092 34,331 44.15 9,864 29.06 0.0133
2021-08-05 2021-06-30 13F DOLBY LABORATORIES INC CL A COM 25659T107 77,761 -4,886 -5.91 7,643 -6.32 0.0100
2021-05-06 2021-03-31 13F DOLBY LABORATORIES INC CL A COM 25659T107 82,647 -1,636 -1.94 8,159 -0.33 0.0111
2021-02-10 2020-12-31 13F DOLBY LABORATORIES INC CL A COM 25659T107 84,283 4,103 5.12 8,186 54.05 0.0113
2020-11-12 2020-09-30 13F DOLBY LABORATORIES INC CL A COM 25659T107 80,180 1,983 2.54 5,314 3.16 0.0083
2020-08-13 2020-06-30 13F DOLBY LABORATORIES INC CL A COM 25659T107 78,197 -690 -0.87 5,151 20.46 0.0086
2020-05-06 2020-03-31 13F DOLBY LABORATORIES INC CL A COM 25659T107 78,887 23,650 42.82 4,276 12.53 0.0090
2020-02-05 2019-12-31 13F DOLBY LABORATORIES INC CL A COM 25659T107 55,237 423 0.77 3,800 7.25 0.0064
2019-10-23 2019-09-30 13F DOLBY LABORATORIES INC CL A COM 25659T107 54,814 1,492 2.80 3,543 2.84 0.0065
2019-08-14 2019-06-30 13F DOLBY LABORATORIES INC CL A COM 25659T107 53,322 -6,522 -10.90 3,445 -8.57 0.0065
2019-05-01 2019-03-31 13F DOLBY LABORATORIES INC CL A COM 25659T107 59,844 -9,774 -14.04 3,768 -12.47 0.0073
2019-01-31 2018-12-31 13F DOLBY LABORATORIES INC CL A COM 25659T107 69,618 2,313 3.44 4,305 -8.58 0.0094
2018-11-07 2018-09-30 13F DOLBY LABORATORIES INC CL A COM 25659T107 67,305 -31 -0.05 4,709 13.36 0.0091
2018-08-06 2018-06-30 13F DOLBY LABORATORIES INC CL A COM 25659T107 67,336 3,026 4.71 4,154 1.61 0.0084
2018-05-02 2018-03-31 13F DOLBY LABORATORIES INC CL A COM 25659T107 64,310 -4,267 -6.22 4,088 -3.86 0.0085
2018-02-09 2017-12-31 13F DOLBY LABORATORIES INC CL A COM 25659T107 68,577 -7 -0.01 4,252 7.78 0.0086
2017-11-06 2017-09-30 13F DOLBY LABORATORIES INC CL A COM 25659T107 68,584 -426 -0.62 3,945 16.75 0.0086
2017-08-02 2017-06-30 13F DOLBY LABORATORIES INC CL A COM 25659T107 69,010 12,790 22.75 3,379 14.70 0.0077
2017-05-02 2017-03-31 13F DOLBY LABORATORIES INC CL A COM 25659T107 56,220 -1,048 -1.83 2,946 13.83 0.0069
2017-01-27 2016-12-31 13F DOLBY LABORATORIES INC CL A COM 25659T107 57,268 4,129 7.77 2,588 -10.29 0.0066
2016-11-08 2016-09-30 13F DOLBY LABORATORIES INC CL A COM 25659T107 53,139 11,458 27.49 2,885 44.68 0.0079
2016-08-11 2016-06-30 13F DOLBY LABORATORIES INC CL A COM 25659T107 41,681 5,539 15.33 1,994 26.93 0.0059
2016-05-02 2016-03-31 13F DOLBY LABORATORIES INC CL A COM 25659T107 36,142 290 0.81 1,571 30.27 0.0049
2016-02-03 2015-12-31 13F DOLBY LABORATORIES INC CL A COM 25659T107 35,852 81 0.23 1,206 3.43 0.0039
2015-11-04 2015-09-30 13F DOLBY LABORATORIES INC CL A COM 25659T107 35,771 2,241 6.68 1,166 -12.33 0.0040
2015-08-04 2015-06-30 13F DOLBY LABORATORIES INC CL A COM 25659T107 33,530 1,355 4.21 1,330 8.31 0.0042
2015-05-12 2015-03-31 13F DOLBY LABORATORIES INC CL A COM 25659T107 32,175 -70 -0.22 1,228 -11.65 0.0035
2015-02-06 2014-12-31 13F DOLBY LABORATORIES INC CL A COM 25659T107 32,245 1,340 4.34 1,390 7.59 0.0040
2014-11-12 2014-09-30 13F DOLBY LABORATORIES INC CL A COM 25659T107 30,905 100 0.32 1,292 -2.93 0.0039
2014-08-06 2014-06-30 13F DOLBY LABORATORIES INC CL A COM 25659T107 30,805 -3,505 -10.22 1,331 -12.84 0.0039
2014-05-06 2014-03-31 13F DOLBY LABORATORIES INC CL A COM 25659T107 34,310 -784 -2.23 1,527 12.86 0.0045
2014-02-03 2013-12-31 13F DOLBY LABORATORIES INC CL A COM 25659T107 35,094 -3,760 -9.68 1,353 0.89 0.0040
2013-11-05 2013-09-30 13F DOLBY LABORATORIES INC CL A COM 25659T107 38,854 -195 -0.50 1,341 2.68 0.0042
2013-08-07 2013-06-30 13F DOLBY LABORATORIES INC CL A COM 25659T107 39,049 39,049 1,306 0.0042
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.