Dolby Laboratories, Inc.
US ˙ NYSE ˙ US25659T1079

SecurityDLB / Dolby Laboratories, Inc.
InstitutionSei Investments Co
Latest Disclosed Ownership244,001 shares
Latest Disclosed Value $ 15,669,830
Sei Investments Co reports 82.81% increase in ownership of DLB / Dolby Laboratories, Inc.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 244,001 shares of Dolby Laboratories, Inc. (US:DLB) valued at $15,669,744 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 133,473 shares of Dolby Laboratories, Inc.. This represents a change in shares of 82.81% during the quarter. The current value of the position is $13,393,215 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)
2026-02-13 2025-12-31 13F DOLBY LABORATORIES COM CL A 25659T107 244,001 110,528 82.81 15,670 62.22
2025-11-13 2025-09-30 13F DOLBY LABORATORIES COM CL A 25659T107 133,473 45,121 51.07 9,659 47.22 0.0104
2025-08-14 2025-06-30 13F DOLBY LABORATORIES COM CL A 25659T107 88,352 922 1.05 6,561 -6.54 0.0076
2025-05-14 2025-03-31 13F/A-1 DOLBY LABORATORIES COM CL A 25659T107 87,430 13,063 17.57 7,020 20.89 0.0090
2025-05-13 2025-03-31 13F DOLBY LABORATORIES COM CL A 25659T107 74,469 102 5,884 0.0064
2025-02-11 2024-12-31 13F DOLBY LABORATORIES COM CL A 25659T107 74,367 -2,940 -3.80 5,808 -1.84 0.0075
2024-11-12 2024-09-30 13F DOLBY LABORATORIES COM CL A 25659T107 77,307 16,946 28.07 5,916 23.71 0.0077
2024-08-13 2024-06-30 13F DOLBY LABORATORIES COM CL A 25659T107 60,361 -34,046 -36.06 4,782 -39.53 0.0068
2024-05-07 2024-03-31 13F DOLBY LABORATORIES COM CL A 25659T107 94,407 3,420 3.76 7,908 0.85 0.0116
2024-02-14 2023-12-31 13F DOLBY LABORATORIES COM CL A 25659T107 90,987 -110,128 -54.76 7,841 -50.81 0.0126
2023-11-14 2023-09-30 13F DOLBY LABORATORIES COM CL A 25659T107 201,115 -4,731 -2.30 15,939 -7.47 0.0286
2023-08-11 2023-06-30 13F DOLBY LABORATORIES COM CL A 25659T107 205,846 -56,527 -21.54 17,226 -23.14 0.0300
2023-05-12 2023-03-31 13F DOLBY LABORATORIES COM CL A 25659T107 262,373 -4,984 -1.86 22,412 18.84 0.0416
2023-02-10 2022-12-31 13F DOLBY LABORATORIES COM CL A 25659T107 267,357 -97,299 -26.68 18,859 -20.63 0.0419
2022-11-14 2022-09-30 13F DOLBY LABORATORIES COM CL A 25659T107 364,656 -170,333 -31.84 23,762 -37.93 0.0530
2022-08-15 2022-06-30 13F DOLBY LABORATORIES COM CL A 25659T107 534,989 -140,229 -20.77 38,285 -27.53 0.0827
2022-05-13 2022-03-31 13F DOLBY LABORATORIES COM CL A 25659T107 675,218 15,397 2.33 52,831 -15.91 0.1062
2022-02-14 2021-12-31 13F DOLBY LABORATORIES COM CL A 25659T107 659,821 127,752 24.01 62,828 34.27 0.1179
2021-11-12 2021-09-30 13F DOLBY LABORATORIES COM CL A 25659T107 532,069 33,744 6.77 46,794 -4.46 0.0982
2021-08-06 2021-06-30 13F DOLBY LABORATORIES COM CL A 25659T107 498,325 7,457 1.52 48,981 1.15 0.1086
2021-05-12 2021-03-31 13F DOLBY LABORATORIES COM CL A 25659T107 490,868 105,428 27.35 48,425 29.39 0.1220
2021-02-08 2020-12-31 13F DOLBY LABORATORIES COM CL A 25659T107 385,440 331,168 610.20 37,426 941.06 0.0968
2020-12-04 2020-09-30 13F/A-1 DOLBY LABORATORIES COM CL A 25659T107 54,272 -4,482 -7.63 3,595 -8.78 0.0104
2020-11-06 2020-09-30 13F DOLBY LABORATORIES COM CL A 25659T107 55,163 -3,591 3,654 8,798.0196
2020-08-17 2020-06-30 13F/A-1 DOLBY LABORATORIES COM CL A 25659T107 58,754 2,881 5.16 3,941 31.02 0.0122
2020-08-11 2020-06-30 13F DOLBY LABORATORIES COM CL A 25659T107 41,830 -14,043 2,834 7,687.3759
2020-05-14 2020-03-31 13F DOLBY LABORATORIES COM CL A 25659T107 55,873 15,686 39.03 3,008 6.44 0.0110
2020-02-06 2019-12-31 13F DOLBY LABORATORIES COM CL A 25659T107 40,187 -24,595 -37.97 2,826 -31.95 0.0084
2019-11-12 2019-09-30 13F DOLBY LABORATORIES COM CL A 25659T107 64,782 -8,778 -11.93 4,153 -12.03 0.0106
2019-08-14 2019-06-30 13F DOLBY LABORATORIES COM CL A 25659T107 73,560 12,909 21.28 4,721 21.74 0.0154
2019-05-15 2019-03-31 13F DOLBY LABORATORIES COM CL A 25659T107 60,651 34,414 131.17 3,878 116.89 0.0130
2019-02-13 2018-12-31 13F DOLBY LABORATORIES COM 25659T107 26,237 5,992 29.60 1,788 26.18 0.0064
2018-11-08 2018-09-30 13F DOLBY LABORATORIES COM 25659T107 20,245 7,106 54.08 1,417 74.94 0.0051
2018-08-03 2018-06-30 13F DOLBY LABORATORIES COM 25659T107 13,139 -219 -1.64 810 -4.59 0.0028
2018-05-11 2018-03-31 13F DOLBY LABORATORIES COM 25659T107 13,358 2,784 26.33 849 29.62 0.0033
2018-02-08 2017-12-31 13F DOLBY LABORATORIES COM 25659T107 10,574 1,483 16.31 655 25.24 0.0023
2017-11-06 2017-09-30 13F DOLBY LABORATORIES COM 25659T107 9,091 8,370 1,160.89 523 1,394.29 0.0019
2017-07-31 2017-06-30 13F DOLBY LABORATORIES COM 25659T107 721 186 34.77 35 25.00 0.0001
2017-05-05 2017-03-31 13F DOLBY LABORATORIES COM 25659T107 535 -52 -8.86 28 7.69 0.0001
2017-02-02 2016-12-31 13F DOLBY LABORATORIES COM 25659T107 587 -47 -7.41 26 -25.71 0.0001
2016-11-04 2016-09-30 13F DOLBY LABORATORIES COM 25659T107 634 94 17.41 35 34.62 0.0002
2016-08-11 2016-06-30 13F DOLBY LABORATORIES COM 25659T107 540 -1,171 -68.44 26 -64.86 0.0002
2016-05-10 2016-03-31 13F/A-1 DOLBY LABORATORIES COM 25659T107 1,711 229 15.45 74 48.00 0.0005
2016-02-03 2015-12-31 13F DOLBY LABORATORIES COM 25659T107 1,482 1,219 463.50 50 455.56 0.0003
2015-11-02 2015-09-30 13F/A-1 DOLBY LABORATORIES COM 25659T107 263 -163 -38.26 9 -47.06 0.0001
2015-10-30 2015-09-30 13F DOLBY LABORATORIES COM 25659T107 263 9
2015-08-07 2015-06-30 13F/A-1 DOLBY LABORATORIES COM 25659T107 426 20 4.93 17 13.33 0.0002
2015-08-04 2015-06-30 13F DOLBY LABORATORIES COM 25659T107 426 20 17 0.0002
2015-05-14 2015-03-31 13F/A-1 DOLBY LABORATORIES COM 25659T107 406 141 53.21 15 15.38 0.0001
2015-05-01 2015-03-31 13F DOLBY LABORATORIES COM 25659T107 406 15
2015-02-10 2014-12-31 13F DOLBY LABORATORIES COM 25659T107 265 265 13 0.0001
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.