David M Whitney
CIK 1357113 · View on SEC EDGAR ↗
Insider
First SEC filing: June 6, 2025 · Latest: June 6, 2025
On this page
Insider at
Insider transactions
0 buys (P)
2 sells (S)
Net:
$-491,923
+ 90 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
90 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| June 10, 2026 | MGRC | S | 3,783 | $113.65 | $429,938 | 6,533 Indirect | -36.67% | Disposed | 5.0% (price as of 2026-08-19) |
| May 15, 2026 | MGRC | S | 539 | $115.00 | $61,985 | 10,316 Indirect | -4.97% | Disposed | 3.8% (price as of 2026-08-19) |
| June 6, 2025 | MGRC | S | 361 | $115.02 | $41,522 | 6,694 Indirect | -5.12% | Disposed | 3.8% (price as of 2026-08-19) |
| June 6, 2025 | MGRC | S | 1,860 | $114.05 | $212,133 | 7,055 Indirect | -20.86% | Disposed | 4.7% (price as of 2026-08-19) |
| June 4, 2025 | MGRC | S | 500 | $116.01 | $58,005 | 8,915 Indirect | -5.31% | Disposed | 2.9% (price as of 2026-08-19) |
| Oct. 30, 2024 | MGRC | S | 5,176 | $117.00 | $605,592 | 205 Direct | -96.19% | Disposed | 2.0% (price as of 2026-08-19) |
| Nov. 3, 2023 | MGRC | S | 4,325 | $102.00 | $441,150 | 4,073 Indirect | -51.50% | Disposed | 17.0% (price as of 2026-08-19) |
| Nov. 3, 2023 | MGRC | S | 1,950 | $102.00 | $198,900 | 3,820 Direct | -33.80% | Disposed | 17.0% (price as of 2026-08-19) |
| Feb. 28, 2023 | MGRC | S | 2,646 | $104.01 | $275,210 | 6,411 Indirect | -29.21% | Disposed | 14.8% (price as of 2026-08-19) |
| Feb. 28, 2023 | MGRC | S | 2,784 | $104.04 | $289,647 | 4,810 Direct | -36.66% | Disposed | 14.7% (price as of 2026-08-19) |
Showing latest 100 of 599 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 |
|---|---|---|---|---|---|---|---|
| Feb. 24, 2026 | MGRC | Restricted Stock Unit | Common Stock (354) | $0.00 | Feb. 24, 2030 | 354 | Disposed |
| Feb. 24, 2026 | MGRC | Restricted Stock Unit | Common Stock (1,060) | $0.00 | Feb. 24, 2030 | 1,060 | Disposed |
| Feb. 24, 2026 | MGRC | Restricted Stock Unit | Common Stock (511) | $0.00 | Feb. 24, 2030 | 511 | Disposed |
| Feb. 24, 2026 | MGRC | Restricted Stock Unit | Common Stock (1,530) | $0.00 | Feb. 24, 2030 | 1,530 | Disposed |
| Feb. 23, 2026 | MGRC | Restricted Stock Unit | Common Stock (587) | $0.00 | Feb. 23, 2031 | 587 | Disposed |
| Feb. 23, 2026 | MGRC | Restricted Stock Unit | Common Stock (933) | $0.00 | Feb. 24, 2031 | 933 | Disposed |
| Feb. 25, 2025 | MGRC | Restricted Stock Unit | Common Stock (524) | $0.00 | Feb. 25, 2029 | 524 | Disposed |
| Feb. 25, 2025 | MGRC | Restricted Stock Unit | Common Stock (1,570) | $0.00 | Feb. 25, 2029 | 1,570 | Disposed |
| Feb. 25, 2025 | MGRC | Restricted Stock Unit | Common Stock (391) | $0.00 | Feb. 25, 2029 | 391 | Disposed |
| Feb. 25, 2025 | MGRC | Restricted Stock Unit | Common Stock (1,170) | $0.00 | Feb. 25, 2029 | 1,170 | Disposed |
| Feb. 24, 2025 | MGRC | Restricted Stock Unit | Common Stock (510) | $0.00 | Feb. 24, 2030 | 510 | Disposed |
| Feb. 24, 2025 | MGRC | Restricted Stock Unit | Common Stock (933) | $0.00 | Feb. 23, 2031 | 933 | Disposed |
| Feb. 24, 2025 | MGRC | Restricted Stock Unit | Common Stock (353) | $0.00 | Feb. 24, 2030 | 353 | Disposed |
| Feb. 24, 2025 | MGRC | Restricted Stock Unit | Common Stock (586) | $0.00 | Feb. 23, 2031 | 586 | Disposed |
| Feb. 26, 2024 | MGRC | Restricted Stock Unit | Common Stock (509) | $0.00 | Feb. 24, 2030 | 509 | Disposed |
| Feb. 26, 2024 | MGRC | Restricted Stock Unit | Common Stock (1,540) | $0.00 | Feb. 24, 2030 | 1,540 | Disposed |
| Feb. 26, 2024 | MGRC | Restricted Stock Unit | Common Stock (523) | $0.00 | Feb. 25, 2029 | 523 | Disposed |
| Feb. 26, 2024 | MGRC | Restricted Stock Unit | Common Stock (514) | $0.00 | Feb. 25, 2028 | 514 | Disposed |
| Feb. 26, 2024 | MGRC | Restricted Stock Unit | Common Stock (353) | $0.00 | Feb. 24, 2030 | 353 | Disposed |
| Feb. 26, 2024 | MGRC | Restricted Stock Unit | Common Stock (390) | $0.00 | Feb. 25, 2029 | 390 | Disposed |
| Feb. 26, 2024 | MGRC | Restricted Stock Unit | Common Stock (374) | $0.00 | Feb. 25, 2028 | 374 | Disposed |
| Feb. 26, 2024 | MGRC | Restricted Stock Unit | Common Stock (1,120) | $0.00 | Feb. 25, 2028 | 1,120 | Disposed |
| Feb. 23, 2024 | MGRC | Restricted Stock Unit | Common Stock (2,800) | $0.00 | Feb. 23, 2031 | 2,800 | Acquired |
| Feb. 23, 2024 | MGRC | Restricted Stock Unit | Common Stock (1,760) | $0.00 | Feb. 23, 2031 | 1,760 | Acquired |
| June 8, 2023 | MGRC | Stock Appreciation Right | Common Stock (5,845) | $34.57 | March 2, 2024 | 5,845 | Disposed |
| June 8, 2023 | MGRC | Stock Appreciation Right | Common Stock (2,800) | $34.57 | March 2, 2024 | 2,800 | Disposed |
| March 1, 2023 | MGRC | Restricted Stock Unit | Common Stock (380) | $0.00 | March 1, 2025 | 380 | Disposed |
| March 1, 2023 | MGRC | Restricted Stock Unit | Common Stock (200) | $0.00 | March 1, 2025 | 200 | Disposed |
| Feb. 27, 2023 | MGRC | Restricted Stock Unit | Common Stock (523) | $0.00 | Feb. 25, 2029 | 523 | Disposed |
| Feb. 27, 2023 | MGRC | Restricted Stock Unit | Common Stock (513) | $0.00 | Feb. 25, 2028 | 513 | Disposed |
| Feb. 27, 2023 | MGRC | Restricted Stock Unit | Common Stock (521) | $0.00 | Feb. 27, 2027 | 521 | Disposed |
| Feb. 27, 2023 | MGRC | Restricted Stock Unit | Common Stock (389) | $0.00 | Feb. 25, 2029 | 389 | Disposed |
| Feb. 27, 2023 | MGRC | Restricted Stock Unit | Common Stock (373) | $0.00 | Feb. 25, 2028 | 373 | Disposed |
| Feb. 27, 2023 | MGRC | Restricted Stock Unit | Common Stock (357) | $0.00 | Feb. 27, 2027 | 357 | Disposed |
| Feb. 24, 2023 | MGRC | Restricted Stock Unit | Common Stock (1,540) | $0.00 | Feb. 24, 2030 | 1,540 | Acquired |
| Feb. 24, 2023 | MGRC | Restricted Stock Unit | Common Stock (1,530) | $0.00 | Feb. 24, 2030 | 1,530 | Acquired |
| Feb. 24, 2023 | MGRC | Restricted Stock Unit | Common Stock (1,530) | $0.00 | Feb. 24, 2030 | 1,530 | Acquired |
| Feb. 24, 2023 | MGRC | Restricted Stock Unit | Common Stock (1,060) | $0.00 | Feb. 24, 2030 | 1,060 | Acquired |
| Feb. 24, 2023 | MGRC | Restricted Stock Unit | Common Stock (1,060) | $0.00 | Feb. 24, 2030 | 1,060 | Acquired |
| March 15, 2022 | MGRC | Stock Appreciation Right | Common Stock (5,715) | $24.60 | March 1, 2023 | 5,715 | Disposed |
| March 15, 2022 | MGRC | Stock Appreciation Right | Common Stock (3,015) | $24.60 | March 1, 2023 | 3,015 | Disposed |
| March 2, 2022 | MGRC | Restricted Stock Unit | Common Stock (1,200) | $0.00 | March 2, 2024 | 1,200 | Disposed |
| March 2, 2022 | MGRC | Restricted Stock Unit | Common Stock (560) | $0.00 | March 2, 2024 | 560 | Disposed |
| March 1, 2022 | MGRC | Restricted Stock Unit | Common Stock (380) | $0.00 | March 1, 2025 | 380 | Disposed |
| March 1, 2022 | MGRC | Restricted Stock Unit | Common Stock (200) | $0.00 | March 1, 2025 | 200 | Disposed |
| Feb. 28, 2022 | MGRC | Restricted Stock Unit | Common Stock (520) | $0.00 | Feb. 27, 2027 | 520 | Disposed |
| Feb. 28, 2022 | MGRC | Restricted Stock Unit | Common Stock (557) | $0.00 | Feb. 28, 2026 | 557 | Disposed |
| Feb. 28, 2022 | MGRC | Restricted Stock Unit | Common Stock (1,670) | $0.00 | Feb. 28, 2022 | 1,670 | Disposed |
| Feb. 28, 2022 | MGRC | Restricted Stock Unit | Common Stock (357) | $0.00 | Feb. 27, 2027 | 357 | Disposed |
| Feb. 28, 2022 | MGRC | Restricted Stock Unit | Common Stock (417) | $0.00 | Feb. 28, 2026 | 417 | Disposed |
| Feb. 28, 2022 | MGRC | Restricted Stock Unit | Common Stock (1,825) | $0.00 | Feb. 28, 2026 | 1,825 | Disposed |
| Feb. 25, 2022 | MGRC | Restricted Stock Unit | Common Stock (513) | $0.00 | Feb. 25, 2028 | 513 | Disposed |
| Feb. 25, 2022 | MGRC | Restricted Stock Unit | Common Stock (1,570) | $0.00 | Feb. 25, 2029 | 1,570 | Acquired |
| Feb. 25, 2022 | MGRC | Restricted Stock Unit | Common Stock (1,570) | $0.00 | Feb. 25, 2029 | 1,570 | Acquired |
| Feb. 25, 2022 | MGRC | Restricted Stock Unit | Common Stock (373) | $0.00 | Feb. 25, 2028 | 373 | Disposed |
| Feb. 25, 2022 | MGRC | Restricted Stock Unit | Common Stock (1,170) | $0.00 | Feb. 25, 2029 | 1,170 | Acquired |
| Feb. 25, 2022 | MGRC | Restricted Stock Unit | Common Stock (1,170) | $0.00 | Feb. 25, 2029 | 1,170 | Acquired |
| March 1, 2021 | MGRC | Restricted Stock Units | Common Stock (519) | $0.00 | Feb. 27, 2027 | 519 | Disposed |
| March 1, 2021 | MGRC | Restricted Stock Units | Common Stock (356) | $0.00 | Feb. 27, 2027 | 356 | Disposed |
| March 1, 2021 | MGRC | Restricted Stock Units | Common Stock (417) | $0.00 | Feb. 28, 2026 | 417 | Acquired |
| March 1, 2021 | MGRC | Restricted Stock Units | Common Stock (557) | $0.00 | Feb. 28, 2026 | 557 | Disposed |
| March 1, 2021 | MGRC | Restricted Stock Units | Common Stock (380) | $0.00 | March 1, 2025 | 380 | Disposed |
| March 1, 2021 | MGRC | Restricted Stock Units | Common Stock (1,900) | $0.00 | March 1, 2025 | 1,900 | Disposed |
| March 1, 2021 | MGRC | Restricted Stock Units | Common Stock (2,000) | $0.00 | March 1, 2025 | 2,000 | Disposed |
| March 1, 2021 | MGRC | Restricted Stock Units | Common Stock (200) | $0.00 | March 1, 2025 | 200 | Disposed |
| Feb. 25, 2021 | MGRC | Restricted Stock Units | Common Stock (1,540) | $0.00 | Feb. 25, 2028 | 1,540 | Acquired |
| Feb. 25, 2021 | MGRC | Restricted Stock Units | Common Stock (1,540) | $0.00 | Feb. 25, 2028 | 1,540 | Acquired |
| Feb. 25, 2021 | MGRC | Restricted Stock Units | Common Stock (1,120) | $0.00 | Feb. 25, 2028 | 1,120 | Acquired |
| Feb. 25, 2021 | MGRC | Restricted Stock Units | Common Stock (1,120) | $0.00 | Feb. 25, 2028 | 1,120 | Acquired |
| Aug. 13, 2020 | MGRC | Stock Appreciation Right | Common Stock (5,715) | $24.60 | March 1, 2023 | 5,715 | Disposed |
| Aug. 13, 2020 | MGRC | Stock Appreciation Right | Common Stock (3,015) | $24.60 | March 1, 2023 | 3,015 | Disposed |
| Aug. 13, 2020 | MGRC | Stock Appreciation Right | Common Stock (2,505) | $34.57 | March 2, 2024 | 2,505 | Disposed |
| Aug. 13, 2020 | MGRC | Stock Appreciation Right | Common Stock (1,260) | $31.99 | March 2, 2022 | 1,260 | Disposed |
| Aug. 13, 2020 | MGRC | Stock Appreciation Right | Common Stock (1,200) | $34.57 | March 2, 2024 | 1,200 | Disposed |
| Aug. 13, 2020 | MGRC | Stock Appreciation Right | Common Stock (670) | $31.99 | March 2, 2022 | 670 | Disposed |
| March 2, 2020 | MGRC | Restricted Stock Units | Common Stock (1,680) | $0.00 | March 2, 2024 | 1,680 | Disposed |
| March 2, 2020 | MGRC | Restricted Stock Units | Common Stock (3,600) | $0.00 | March 2, 2024 | 3,600 | Disposed |
| March 2, 2020 | MGRC | Restricted Stock Units | Common Stock (380) | $0.00 | March 1, 2025 | 380 | Disposed |
| March 2, 2020 | MGRC | Restricted Stock Units | Common Stock (594) | $0.00 | March 2, 2022 | 594 | Disposed |
| March 2, 2020 | MGRC | Restricted Stock Units | Common Stock (200) | $0.00 | March 1, 2025 | 200 | Disposed |
| Feb. 28, 2020 | MGRC | Restricted Stock Units | Common Stock (416) | $0.00 | Feb. 28, 2026 | 416 | Disposed |
| Feb. 28, 2020 | MGRC | Restricted Stock Units | Common Stock (556) | $0.00 | Feb. 28, 2026 | 556 | Disposed |
| Feb. 27, 2020 | MGRC | Restricted Stock Units | Common Stock (1,070) | $0.00 | Feb. 27, 2027 | 1,070 | Acquired |
| Feb. 27, 2020 | MGRC | Restricted Stock Units | Common Stock (1,560) | $0.00 | Feb. 27, 2027 | 1,560 | Acquired |
| Feb. 27, 2020 | MGRC | Restricted Stock Units | Common Stock (1,070) | $0.00 | Feb. 27, 2027 | 1,070 | Acquired |
| Feb. 27, 2020 | MGRC | Restricted Stock Units | Common Stock (1,560) | $0.00 | Feb. 27, 2027 | 1,560 | Acquired |
| Oct. 31, 2019 | MGRC | Stock Appreciation Right | Common Stock (400) | $34.57 | March 2, 2024 | 400 | Disposed |
| Oct. 31, 2019 | MGRC | Stock Appreciation Right | Common Stock (1,905) | $24.60 | March 1, 2023 | 1,905 | Disposed |
| Oct. 31, 2019 | MGRC | Stock Appreciation Right | Common Stock (835) | $34.57 | March 2, 2024 | 835 | Disposed |
| Oct. 31, 2019 | MGRC | Stock Appreciation Right | Common Stock (335) | $31.99 | March 2, 2022 | 335 | Disposed |
| Oct. 31, 2019 | MGRC | Stock Appreciation Right | Common Stock (1,005) | $24.60 | March 1, 2023 | 1,005 | Disposed |
| Oct. 31, 2019 | MGRC | Stock Appreciation Right | Common Stock (630) | $31.99 | March 2, 2022 | 630 | Disposed |
| Aug. 2, 2019 | MGRC | Stock Appreciation Right | Common Stock (1,005) | $24.60 | March 1, 2023 | 1,005 | Disposed |
| Aug. 2, 2019 | MGRC | Stock Appreciation Right | Common Stock (335) | $31.99 | March 2, 2022 | 335 | Disposed |
| Aug. 2, 2019 | MGRC | Stock Appreciation Right | Common Stock (835) | $34.57 | March 2, 2024 | 835 | Disposed |
| Aug. 2, 2019 | MGRC | Stock Appreciation Right | Common Stock (1,905) | $24.60 | March 1, 2023 | 1,905 | Disposed |
| Aug. 2, 2019 | MGRC | Stock Appreciation Right | Common Stock (630) | $31.99 | March 2, 2022 | 630 | Disposed |
| Aug. 2, 2019 | MGRC | Stock Appreciation Right | Common Stock (400) | $34.57 | March 2, 2024 | 400 | Disposed |
| March 2, 2017 | MGRC | Restricted Stock Units | Common Stock (1,200) | $0.00 | March 2, 2024 | 1,200 | Disposed |
| March 2, 2017 | MGRC | Restricted Stock Units | Common Stock (560) | $0.00 | March 2, 2024 | 560 | Disposed |
Showing latest 100 of 235 transactions
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 4 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| March 31, 2006 | MGRC | Common Stock | 9,890 | Direct |
| March 31, 2006 | MGRC | Option to Buy (Officer's Option)→ Common Stock (19,900) | 19,900 | Direct |
| March 31, 2006 | MGRC | Option to Buy (Officer's Option)→ Common Stock (8,000) | 8,000 | Direct |
| March 31, 2006 | MGRC | Option to Buy (Officer's Option)→ Common Stock (13,000) | 13,000 | Direct |