Mark Andrew Sherman
CIK 1256708 · View on SEC EDGAR ↗
Insider
First SEC filing: May 30, 2024 · Latest: May 30, 2024
On this page
Insider at
Insider transactions
0 buys (P)
4 sells (S)
Net:
$-1,079,441
+ 62 non-open-market transactions below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
62 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Dec. 17, 2025 | DLB | S 10b5-1 | 2,491 | $67.26 | $167,545 | 70,563 Direct | -3.41% | Disposed | -7.4% (price as of 2026-08-19) |
| Dec. 16, 2025 | DLB | S 10b5-1 | 2,371 | $67.17 | $159,260 | 73,054 Direct | -3.14% | Disposed | -7.3% (price as of 2026-08-19) |
| Dec. 16, 2025 | DLB | S 10b5-1 | 6,738 | $66.58 | $448,616 | 75,425 Direct | -8.20% | Disposed | -6.5% (price as of 2026-08-19) |
| Dec. 1, 2025 | DLB | S | 4,500 | $67.56 | $304,020 | 62,397 Direct | -6.73% | Disposed | -7.8% (price as of 2026-08-19) |
| June 4, 2025 | DLB | S | 15,000 | $75.02 | $1,125,300 | 62,397 Direct | -19.38% | Disposed | -17.0% (price as of 2026-08-19) |
| May 30, 2025 | DLB | S | 350 | $74.97 | $26,240 | 62,397 Direct | -0.56% | Disposed | -16.9% (price as of 2026-08-19) |
| Jan. 30, 2025 | DLB | S | 25,000 | $86.00 | $2,150,000 | 62,397 Direct | -28.61% | Disposed | -27.6% (price as of 2026-08-19) |
| Jan. 30, 2025 | DLB | S | 15,000 | $83.00 | $1,245,000 | 87,397 Direct | -14.65% | Disposed | -25.0% (price as of 2026-08-19) |
| Dec. 17, 2024 | DLB | S | 7,713 | $78.22 | $603,311 | 62,397 Direct | -11.00% | Disposed | -20.4% (price as of 2026-08-19) |
| Dec. 17, 2024 | DLB | S | 4,625 | $77.83 | $359,964 | 70,110 Direct | -6.19% | Disposed | -20.0% (price as of 2026-08-19) |
| May 28, 2024 | DLB | S | 2,283 | $79.62 | $181,772 | 58,325 Direct | -3.77% | Disposed | -21.8% (price as of 2026-08-19) |
| Dec. 19, 2023 | DLB | S | 1,663 | $86.01 | $143,035 | 58,325 Direct | -2.77% | Disposed | -27.6% (price as of 2026-08-19) |
| Dec. 18, 2023 | DLB | S | 8,856 | $86.19 | $763,299 | 59,988 Direct | -12.86% | Disposed | -27.7% (price as of 2026-08-19) |
| July 12, 2023 | DLB | S | 21,000 | $89.00 | $1,869,000 | 56,730 Direct | -27.02% | Disposed | -30.0% (price as of 2026-08-19) |
| May 8, 2023 | DLB | S | 2,180 | $84.35 | $183,883 | 56,374 Direct | -3.72% | Disposed | -26.2% (price as of 2026-08-19) |
| May 8, 2023 | DLB | S | 12,820 | $83.47 | $1,070,085 | 58,554 Direct | -17.96% | Disposed | -25.4% (price as of 2026-08-19) |
| Feb. 7, 2023 | DLB | S | 2,413 | $83.65 | $201,847 | 56,374 Direct | -4.10% | Disposed | -25.5% (price as of 2026-08-19) |
| Feb. 3, 2023 | DLB | S | 12,000 | $85.00 | $1,020,000 | 58,787 Direct | -16.95% | Disposed | -26.7% (price as of 2026-08-19) |
| Dec. 20, 2022 | DLB | S | 1,638 | $68.09 | $111,531 | 58,787 Direct | -2.71% | Disposed | -8.5% (price as of 2026-08-19) |
| Dec. 19, 2022 | DLB | S | 332 | $70.44 | $23,386 | 60,425 Direct | -0.55% | Disposed | -11.6% (price as of 2026-08-19) |
| Dec. 19, 2022 | DLB | S | 4,738 | $69.80 | $330,712 | 60,757 Direct | -7.23% | Disposed | -10.8% (price as of 2026-08-19) |
| Dec. 16, 2022 | DLB | S | 2,334 | $70.66 | $164,920 | 67,107 Direct | -3.36% | Disposed | -11.9% (price as of 2026-08-19) |
| Feb. 9, 2022 | DLB | S | 1,798 | $77.23 | $138,860 | 51,601 Direct | -3.37% | Disposed | -19.4% (price as of 2026-08-19) |
| Dec. 20, 2021 | DLB | S | 1,638 | $90.69 | $148,550 | 53,399 Direct | -2.98% | Disposed | -31.3% (price as of 2026-08-19) |
| Dec. 17, 2021 | DLB | S | 1,663 | $90.17 | $149,953 | 55,037 Direct | -2.93% | Disposed | -30.9% (price as of 2026-08-19) |
| March 1, 2021 | DLB | S | 13,000 | $100.00 | $1,300,000 | 50,010 Direct | -20.63% | Disposed | -37.7% (price as of 2026-08-19) |
| Feb. 16, 2021 | DLB | S | 13,000 | $95.00 | $1,235,000 | 50,010 Direct | -20.63% | Disposed | -34.4% (price as of 2026-08-19) |
| Feb. 5, 2021 | DLB | S | 496 | $92.23 | $45,746 | 50,010 Direct | -0.98% | Disposed | -32.5% (price as of 2026-08-19) |
| Feb. 5, 2021 | DLB | S | 22,622 | $91.58 | $2,071,723 | 50,506 Direct | -30.93% | Disposed | -32.0% (price as of 2026-08-19) |
| Feb. 5, 2021 | DLB | S | 175 | $92.23 | $16,140 | 50,010 Direct | -0.35% | Disposed | -32.5% (price as of 2026-08-19) |
| Feb. 5, 2021 | DLB | S | 2,707 | $91.48 | $247,636 | 50,185 Direct | -5.12% | Disposed | -31.9% (price as of 2026-08-19) |
| Feb. 5, 2021 | DLB | S | 227 | $92.23 | $20,936 | 50,010 Direct | -0.45% | Disposed | -32.5% (price as of 2026-08-19) |
| Feb. 5, 2021 | DLB | S | 1,436 | $91.68 | $131,652 | 50,237 Direct | -2.78% | Disposed | -32.1% (price as of 2026-08-19) |
| Dec. 18, 2020 | DLB | S | 1,638 | $91.96 | $150,630 | 51,673 Direct | -3.07% | Disposed | -32.3% (price as of 2026-08-19) |
| Dec. 16, 2020 | DLB | S | 332 | $91.90 | $30,511 | 58,312 Direct | -0.57% | Disposed | -32.2% (price as of 2026-08-19) |
| Dec. 16, 2020 | DLB | S | 1,432 | $90.97 | $130,269 | 58,644 Direct | -2.38% | Disposed | -31.5% (price as of 2026-08-19) |
| Dec. 16, 2020 | DLB | S | 337 | $91.66 | $30,889 | 54,923 Direct | -0.61% | Disposed | -32.1% (price as of 2026-08-19) |
| Dec. 16, 2020 | DLB | S | 3,065 | $90.62 | $277,750 | 55,260 Direct | -5.26% | Disposed | -31.3% (price as of 2026-08-19) |
Showing latest 100 of 263 transactions
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II)
Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| Dec. 15, 2025 | DLB | Performance-Based Restricted Stock Unit | Class A Common Stock (5,915) | — | — | 5,915 | Disposed |
| Dec. 15, 2025 | DLB | Employee Stock Option (Right to Buy) | Class A Common Stock (56,440) | $66.62 | Dec. 15, 2035 | 56,440 | Acquired |
| Dec. 15, 2025 | DLB | Performance-Based Restricted Stock Unit | Class A Common Stock (12,816) | — | — | 12,816 | Acquired |
| Dec. 1, 2025 | DLB | Employee Stock Option (Right to Buy) | Class A Common Stock (4,500) | $64.60 | Dec. 17, 2025 | 4,500 | Disposed |
| June 4, 2025 | DLB | Employee Stock Option (Right to Buy) | Class A Common Stock (15,000) | $64.60 | Dec. 17, 2025 | 15,000 | Disposed |
| Jan. 30, 2025 | DLB | Employee Stock Option (Right to Buy) | Class A Common Stock (40,000) | $62.32 | Dec. 15, 2027 | 40,000 | Disposed |
| Dec. 16, 2024 | DLB | Performance-Based Restricted Stock Unit | Class A Common Stock (5,192) | — | — | 5,192 | Disposed |
| Dec. 16, 2024 | DLB | Employee Stock Option (Right to Buy) | Class A Common Stock (35,307) | $77.91 | Dec. 16, 2034 | 35,307 | Acquired |
| Dec. 16, 2024 | DLB | Performance-Based Restricted Stock Unit | Class A Common Stock (10,042) | — | — | 10,042 | Acquired |
| May 28, 2024 | DLB | Employee Stock Option (Right to Buy) | Class A Common Stock (1,998) | $62.32 | Dec. 15, 2024 | 1,998 | Disposed |
| Dec. 15, 2023 | DLB | Performance-Based Restricted Stock Unit | Class A Common Stock (5,738) | — | — | 5,738 | Disposed |
| Dec. 15, 2023 | DLB | Employee Stock Option (Right to Buy) | Class A Common Stock (29,316) | $87.49 | Dec. 15, 2033 | 29,316 | Acquired |
| Dec. 15, 2023 | DLB | Performance-Based Restricted Stock Unit | Class A Common Stock (8,363) | — | — | 8,363 | Acquired |
| July 12, 2023 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (21,000) | $62.32 | Dec. 15, 2024 | 21,000 | Disposed |
| May 8, 2023 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (3,882) | $62.32 | Dec. 15, 2024 | 3,882 | Disposed |
| May 8, 2023 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (11,118) | $45.50 | Dec. 15, 2026 | 11,118 | Disposed |
| Feb. 3, 2023 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (12,000) | $45.50 | Dec. 15, 2026 | 12,000 | Disposed |
| Dec. 16, 2022 | DLB | Performance-Based Restricted Stock Unit | Class A Common Stock (5,344) | — | — | 5,344 | Disposed |
| Dec. 15, 2022 | DLB | Employee Stock Option (Right to Buy) | Class A Common Stock (32,944) | $71.07 | Dec. 15, 2032 | 32,944 | Acquired |
| Dec. 15, 2022 | DLB | Performance-Based Restricted Stock Unit | Class A Common Stock (9,149) | — | — | 9,149 | Acquired |
| Dec. 15, 2021 | DLB | Employee Stock Option (Right to Buy) | Class A Common Stock (30,545) | $91.80 | Dec. 15, 2031 | 30,545 | Acquired |
| Dec. 15, 2021 | DLB | Performance-Based Restricted Stock Unit | Class A Common Stock (7,378) | — | — | 7,378 | Acquired |
| March 1, 2021 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (13,000) | $45.50 | Dec. 15, 2026 | 13,000 | Disposed |
| Feb. 16, 2021 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (13,000) | $45.50 | Dec. 15, 2026 | 13,000 | Disposed |
| Feb. 5, 2021 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (23,118) | $45.50 | Dec. 15, 2023 | 23,118 | Disposed |
| Feb. 5, 2021 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (2,882) | $45.50 | Dec. 15, 2026 | 2,882 | Disposed |
| Dec. 15, 2020 | DLB | Employee Stock Option (Right to Buy) | Class A Common Stock (30,553) | $92.08 | Dec. 15, 2030 | 30,553 | Acquired |
| Dec. 15, 2020 | DLB | Performance-Based Restricted Stock Unit | Class A Common Stock (7,136) | — | — | 7,136 | Acquired |
| Nov. 3, 2020 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (1,582) | $45.50 | Dec. 15, 2023 | 1,582 | Disposed |
| Nov. 3, 2020 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (23,418) | $42.98 | Dec. 15, 2024 | 23,418 | Disposed |
| Nov. 2, 2020 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (25,000) | $42.98 | Dec. 15, 2024 | 25,000 | Disposed |
| Feb. 19, 2020 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (20,000) | $42.98 | Dec. 15, 2024 | 20,000 | Disposed |
| Feb. 6, 2020 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (29,821) | $37.35 | Dec. 16, 2023 | 29,821 | Disposed |
| Feb. 6, 2020 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (6,794) | $42.98 | Dec. 15, 2024 | 6,794 | Disposed |
| Feb. 5, 2020 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (38,176) | $37.35 | Dec. 16, 2023 | 38,176 | Disposed |
| Feb. 5, 2020 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (5,209) | $33.15 | Dec. 15, 2025 | 5,209 | Disposed |
| Dec. 16, 2019 | DLB | Employee Stock Option (Right to Buy) | Class A Common Stock (60,000) | $68.40 | Dec. 16, 2029 | 60,000 | Acquired |
| Dec. 16, 2019 | DLB | Performance-Based Restricted Stock Unit | Class A Common Stock (6,600) | — | — | 6,600 | Acquired |
| Aug. 1, 2019 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (6,040) | $37.35 | Dec. 16, 2023 | 6,040 | Disposed |
| Aug. 1, 2019 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (1,460) | $33.15 | Dec. 15, 2022 | 1,460 | Disposed |
| July 31, 2019 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (29,790) | $33.15 | Dec. 15, 2022 | 29,790 | Disposed |
| July 31, 2019 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (20,210) | $33.15 | Dec. 15, 2025 | 20,210 | Disposed |
| Feb. 22, 2019 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (5,063) | $33.15 | Dec. 15, 2025 | 5,063 | Disposed |
| Feb. 21, 2019 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (19,518) | $33.15 | Dec. 15, 2025 | 19,518 | Disposed |
| Feb. 21, 2019 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (2,919) | $30.49 | Dec. 21, 2022 | 2,919 | Disposed |
| Dec. 17, 2018 | DLB | Employee Stock Option (Right to Buy) | Class A Common Stock (52,000) | $64.60 | Dec. 17, 2028 | 52,000 | Acquired |
| Dec. 17, 2018 | DLB | Performance-Based Stock Option (Right to Buy) | Class A Common Stock (26,000) | $64.60 | Dec. 17, 2025 | 26,000 | Acquired |
| Aug. 23, 2018 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (10,000) | $30.49 | Dec. 21, 2022 | 10,000 | Disposed |
| Feb. 26, 2018 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (10,000) | $30.49 | Dec. 21, 2022 | 10,000 | Disposed |
| Feb. 8, 2018 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (31,554) | $30.49 | Dec. 21, 2022 | 31,554 | Disposed |
| Feb. 7, 2018 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (7,227) | $30.49 | Dec. 21, 2022 | 7,227 | Disposed |
| Feb. 7, 2018 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (41,219) | $28.24 | Dec. 15, 2021 | 41,219 | Disposed |
| Jan. 12, 2018 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (10,000) | $28.24 | Dec. 15, 2021 | 10,000 | Disposed |
| Dec. 15, 2017 | DLB | Employee Stock Option (Right to Buy) | Class A Common Stock (56,000) | $62.32 | Dec. 15, 2027 | 56,000 | Acquired |
| Dec. 15, 2017 | DLB | Performance-Based Stock Option (Right to Buy) | Class A Common Stock (28,000) | $62.32 | Dec. 15, 2024 | 28,000 | Acquired |
| Oct. 18, 2017 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (7,000) | $28.24 | Dec. 15, 2021 | 7,000 | Disposed |
| Sept. 13, 2017 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (14,000) | $28.24 | Dec. 15, 2021 | 14,000 | Disposed |
| March 29, 2017 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (6,000) | $28.24 | Dec. 15, 2021 | 6,000 | Disposed |
| March 1, 2017 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (6,000) | $28.24 | Dec. 15, 2021 | 6,000 | Disposed |
| Jan. 30, 2017 | DLB | Employee Stock Option (right to buy) | Class A Common Stock (10,000) | $28.24 | Dec. 15, 2021 | 10,000 | Disposed |
| Dec. 15, 2016 | DLB | Employee Stock Option (Right to Buy) | Class A Common Stock (52,000) | $45.50 | Dec. 15, 2026 | 52,000 | Acquired |
| Dec. 15, 2016 | DLB | Performance-Based Stock Option (Right to Buy) | Class A Common Stock (26,000) | $45.50 | Dec. 15, 2023 | 26,000 | Acquired |
| Dec. 15, 2015 | DLB | Employee Stock Option (Right to Buy) | Class A Common Stock (50,000) | $33.15 | Dec. 15, 2025 | 50,000 | Acquired |
| Dec. 15, 2015 | DLB | Performance-Based Stock Option (Right to Buy) | Class A Common Stock (25,000) | $33.15 | Dec. 15, 2022 | 25,000 | Acquired |
| Dec. 15, 2014 | DLB | Employee Stock Option (Right to Buy) | Class A Common Stock (75,212) | — | Dec. 15, 2024 | 75,212 | Acquired |
| Dec. 15, 2014 | DLB | Employee Stock Option (Right to Buy) | Class A Common Stock (75,212) | $44.14 | Dec. 15, 2024 | 75,212 | Acquired |
| Dec. 16, 2013 | DLB | Employee Stock Option (Right to Buy) | Class A Common Stock (74,037) | $37.35 | Dec. 16, 2023 | 74,037 | Acquired |
| Dec. 21, 2012 | DLB | Employee Stock Option (Right to Buy) | Class A Common Stock (61,700) | $30.49 | Dec. 21, 2022 | 61,700 | Acquired |
| Aug. 10, 2012 | DLB | Employee Stock Option (Right to Buy) | Class A Common Stock (69,000) | $60.69 | Jan. 18, 2021 | 69,000 | Disposed |
| Dec. 15, 2011 | DLB | Employee Stock Option (Right to Buy) | Class A Common Stock (84,600) | $31.45 | Dec. 15, 2021 | 84,600 | Acquired |
| Jan. 18, 2011 | DLB | Employee Stock Option (Right to Buy) | Class A Common Stock (69,000) | $60.69 | Jan. 18, 2021 | 69,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).