Steven C. Marshall
Insider
First SEC filing: Nov. 1, 2018 · Latest: Nov. 1, 2018
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net: $0
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Oct. 30, 2018 | AMT | M | 61,368 | $50.78 | $3,116,267 | 166,203 Direct | +58.54% | Acquired | 219.4% (price as of 2026-10-02) |
| Oct. 30, 2018 | AMT | S 10b5-1 | 61,368 | $154.00 | $9,450,672 | 104,835 Direct | -36.92% | Disposed | 5.3% (price as of 2026-10-02) |
| Oct. 30, 2018 | AMT | M | 71,798 | $62.00 | $4,451,476 | 176,633 Direct | +68.49% | Acquired | 161.6% (price as of 2026-10-02) |
| Oct. 30, 2018 | AMT | S 10b5-1 | 71,798 | $158.00 | $11,344,084 | 104,835 Direct | -40.65% | Disposed | 2.7% (price as of 2026-10-02) |
| Oct. 30, 2018 | AMT | M | 30,000 | $43.11 | $1,293,300 | 134,835 Direct | +28.62% | Acquired | 276.2% (price as of 2026-10-02) |
| Oct. 30, 2018 | AMT | S 10b5-1 | 30,000 | $160.00 | $4,800,000 | 104,835 Direct | -22.25% | Disposed | 1.4% (price as of 2026-10-02) |
| Oct. 30, 2018 | AMT | M | 61,368 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Oct. 30, 2018 | AMT | M | 71,798 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Oct. 30, 2018 | AMT | M | 30,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| March 12, 2018 | AMT | A | 11,856 | · | · | 104,694 Direct | +12.77% | Acquired | (price as of 2026-10-02) |
| March 10, 2018 | AMT | F | 13,118 | $143.58 | $1,883,482 | 92,838 Direct | -12.38% | Disposed | 13.0% (price as of 2026-10-02) |
| Feb. 27, 2018 | AMT | A | 6,468 | · | · | 105,956 Direct | +6.50% | Acquired | (price as of 2026-10-02) |
| June 27, 2017 | AMT | M | 17,162 | $28.39 | $487,229 | 119,994 Direct | +16.69% | Acquired | 471.3% (price as of 2026-10-02) |
| June 27, 2017 | AMT | S 10b5-1 | 20,548 | $134.92 | $2,772,336 | 99,446 Direct | -17.12% | Disposed | 20.2% (price as of 2026-10-02) |
| June 27, 2017 | AMT | M | 17,162 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| March 11, 2017 | AMT | F | 2,004 | $113.58 | $227,614 | 102,640 Direct | -1.92% | Disposed | 42.8% (price as of 2026-10-02) |
| March 10, 2017 | AMT | A | 14,087 | · | · | 109,372 Direct | +14.78% | Acquired | (price as of 2026-10-02) |
| March 10, 2017 | AMT | F | 4,728 | $113.58 | $537,006 | 104,644 Direct | -4.32% | Disposed | 42.8% (price as of 2026-10-02) |
| Feb. 27, 2017 | AMT | A | 5,539 | · | · | 95,285 Direct | +6.17% | Acquired | (price as of 2026-10-02) |
| July 12, 2016 | AMT | M | 50,000 | $44.92 | $2,246,000 | 139,689 Direct | +55.75% | Acquired | 261.1% (price as of 2026-10-02) |
| July 12, 2016 | AMT | S 10b5-1 | 25,000 | $115.00 | $2,875,000 | 114,689 Direct | -17.90% | Disposed | 41.0% (price as of 2026-10-02) |
| July 12, 2016 | AMT | S 10b5-1 | 25,000 | $116.00 | $2,900,000 | 89,689 Direct | -21.80% | Disposed | 39.8% (price as of 2026-10-02) |
| July 12, 2016 | AMT | M | 50,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| July 11, 2016 | AMT | M | 50,000 | $44.92 | $2,246,000 | 139,689 Direct | +55.75% | Acquired | 261.1% (price as of 2026-10-02) |
| July 11, 2016 | AMT | S 10b5-1 | 25,000 | $113.68 | $2,842,000 | 114,689 Direct | -17.90% | Disposed | 42.7% (price as of 2026-10-02) |
| July 11, 2016 | AMT | S 10b5-1 | 25,000 | $114.00 | $2,850,000 | 89,689 Direct | -21.80% | Disposed | 42.3% (price as of 2026-10-02) |
| July 11, 2016 | AMT | M | 50,000 | · | · | 50,000 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| July 8, 2016 | AMT | M | 50,000 | $44.92 | $2,246,000 | 139,689 Direct | +55.75% | Acquired | 261.1% (price as of 2026-10-02) |
| July 8, 2016 | AMT | S 10b5-1 | 50,000 | $112.81 | $5,640,500 | 89,689 Direct | -35.79% | Disposed | 43.8% (price as of 2026-10-02) |
| July 8, 2016 | AMT | M | 50,000 | · | · | 100,000 Direct | -33.33% | Disposed | (price as of 2026-10-02) |
| March 12, 2016 | AMT | F | 2,231 | $98.46 | $219,664 | 89,501 Direct | -2.43% | Disposed | 64.7% (price as of 2026-10-02) |
| March 11, 2016 | AMT | F | 2,036 | $98.46 | $200,465 | 91,732 Direct | -2.17% | Disposed | 64.7% (price as of 2026-10-02) |
| March 10, 2016 | AMT | A | 15,500 | · | · | 96,709 Direct | +19.09% | Acquired | (price as of 2026-10-02) |
| March 10, 2016 | AMT | F | 2,941 | $94.71 | $278,542 | 93,768 Direct | -3.04% | Disposed | 71.3% (price as of 2026-10-02) |
| Feb. 26, 2016 | AMT | A | 4,617 | · | · | 81,209 Direct | +6.03% | Acquired | (price as of 2026-10-02) |
| March 12, 2015 | AMT | F | 2,280 | $96.27 | $219,496 | 81,387 Direct | -2.73% | Disposed | 68.5% (price as of 2026-10-02) |
| March 11, 2015 | AMT | F | 2,081 | $94.63 | $196,925 | 78,627 Direct | -2.58% | Disposed | 71.4% (price as of 2026-10-02) |
| March 10, 2015 | AMT | A | 9,702 | · | · | 85,258 Direct | +12.84% | Acquired | (price as of 2026-10-02) |
| March 10, 2015 | AMT | F | 4,550 | $94.57 | $430,294 | 80,708 Direct | -5.34% | Disposed | 71.5% (price as of 2026-10-02) |
| March 10, 2015 | AMT | A | 121,604 | · | · | 121,604 Direct | · | Acquired | (price as of 2026-10-02) |
| March 12, 2014 | AMT | M | 5,041 | · | · | 28,926 Direct | +21.11% | Acquired | (price as of 2026-10-02) |
| March 12, 2014 | AMT | F | 2,293 | $80.84 | $185,366 | 26,633 Direct | -7.93% | Disposed | 100.6% (price as of 2026-10-02) |
| March 12, 2014 | AMT | M | 5,041 | · | · | 10,080 Direct | -33.34% | Disposed | (price as of 2026-10-02) |
| March 11, 2014 | AMT | M | 4,552 | · | · | 25,983 Direct | +21.24% | Acquired | (price as of 2026-10-02) |
| March 11, 2014 | AMT | F | 2,098 | $81.70 | $171,407 | 23,885 Direct | -8.07% | Disposed | 98.5% (price as of 2026-10-02) |
| March 11, 2014 | AMT | M | 4,552 | · | · | 13,654 Direct | -25.00% | Disposed | (price as of 2026-10-02) |
| March 10, 2014 | AMT | M | 5,219 | · | · | 20,578 Direct | +33.98% | Acquired | (price as of 2026-10-02) |
| March 10, 2014 | AMT | F | 1,896 | $81.18 | $153,917 | 18,682 Direct | -9.21% | Disposed | 99.8% (price as of 2026-10-02) |
| March 10, 2014 | AMT | M | 5,169 | · | · | 23,851 Direct | +27.67% | Acquired | (price as of 2026-10-02) |
| March 10, 2014 | AMT | F | 2,420 | $81.18 | $196,456 | 21,431 Direct | -10.15% | Disposed | 99.8% (price as of 2026-10-02) |
| March 10, 2014 | AMT | M | 5,219 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| March 10, 2014 | AMT | M | 5,169 | · | · | 5,169 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| March 10, 2014 | AMT | A | 107,817 | · | · | 107,817 Direct | · | Acquired | (price as of 2026-10-02) |
| March 10, 2014 | AMT | A | 19,710 | · | · | 19,710 Direct | · | Acquired | (price as of 2026-10-02) |
| March 12, 2013 | AMT | M | 5,041 | · | · | 17,357 Direct | +40.93% | Acquired | (price as of 2026-10-02) |
| March 12, 2013 | AMT | F | 2,330 | $76.03 | $177,150 | 15,027 Direct | -13.42% | Disposed | 113.3% (price as of 2026-10-02) |
| March 12, 2013 | AMT | M | 5,041 | · | · | 15,121 Direct | -25.00% | Disposed | (price as of 2026-10-02) |
| March 11, 2013 | AMT | A | 72,539 | · | · | 72,539 Direct | · | Acquired | (price as of 2026-10-02) |
| March 11, 2013 | AMT | A | 18,206 | · | · | 18,206 Direct | · | Acquired | (price as of 2026-10-02) |
| March 10, 2013 | AMT | M | 5,283 | · | · | 8,693 Direct | +154.93% | Acquired | (price as of 2026-10-02) |
| March 10, 2013 | AMT | F | 1,897 | $77.14 | $146,335 | 6,796 Direct | -21.82% | Disposed | 110.3% (price as of 2026-10-02) |
| March 10, 2013 | AMT | M | 5,219 | · | · | 12,015 Direct | +76.80% | Acquired | (price as of 2026-10-02) |
| March 10, 2013 | AMT | F | 2,446 | $77.14 | $188,684 | 9,569 Direct | -20.36% | Disposed | 110.3% (price as of 2026-10-02) |
| March 10, 2013 | AMT | M | 5,170 | · | · | 14,739 Direct | +54.03% | Acquired | (price as of 2026-10-02) |
| March 10, 2013 | AMT | F | 2,423 | $77.14 | $186,910 | 12,316 Direct | -16.44% | Disposed | 110.3% (price as of 2026-10-02) |
| March 10, 2013 | AMT | M | 5,283 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| March 10, 2013 | AMT | M | 5,219 | · | · | 5,219 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| March 10, 2013 | AMT | M | 5,170 | · | · | 10,338 Direct | -33.34% | Disposed | (price as of 2026-10-02) |
| Aug. 1, 2012 | AMT | M | 30,000 | $43.11 | $1,293,300 | 33,410 Direct | +879.77% | Acquired | 276.2% (price as of 2026-10-02) |
| Aug. 1, 2012 | AMT | S 10b5-1 | 30,000 | $74.00 | $2,220,000 | 3,410 Direct | -89.79% | Disposed | 119.2% (price as of 2026-10-02) |
| Aug. 1, 2012 | AMT | M | 30,000 | · | · | 30,000 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| July 10, 2012 | AMT | M | 32,500 | $37.70 | $1,225,250 | 35,910 Direct | +953.08% | Acquired | 330.2% (price as of 2026-10-02) |
| July 10, 2012 | AMT | S 10b5-1 | 32,500 | $72.00 | $2,340,000 | 3,410 Direct | -90.50% | Disposed | 125.3% (price as of 2026-10-02) |
| July 10, 2012 | AMT | M | 32,500 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| June 29, 2012 | AMT | M | 51,488 | $28.39 | $1,461,744 | 54,898 Direct | +1509.91% | Acquired | 471.3% (price as of 2026-10-02) |
| June 29, 2012 | AMT | S 10b5-1 | 51,488 | $70.13 | $3,610,853 | 3,410 Direct | -93.79% | Disposed | 131.3% (price as of 2026-10-02) |
| June 29, 2012 | AMT | M | 51,488 | · | · | 17,162 Direct | -75.00% | Disposed | (price as of 2026-10-02) |
| June 19, 2012 | AMT | S 10b5-1 | 14,272 | $69.00 | $984,768 | 3,410 Direct | -80.71% | Disposed | 135.1% (price as of 2026-10-02) |
| June 14, 2012 | AMT | S 10b5-1 | 7,564 | $67.00 | $506,788 | 17,682 Direct | -29.96% | Disposed | 142.1% (price as of 2026-10-02) |
| March 17, 2012 | AMT | M | 2,322 | · | · | 25,800 Direct | +9.89% | Acquired | (price as of 2026-10-02) |
| March 17, 2012 | AMT | F | 981 | $63.34 | $62,137 | 24,819 Direct | -3.80% | Disposed | 156.1% (price as of 2026-10-02) |
| March 17, 2012 | AMT | M | 2,322 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| March 12, 2012 | AMT | A | 71,798 | · | · | 71,798 Direct | · | Acquired | (price as of 2026-10-02) |
| March 12, 2012 | AMT | A | 20,162 | · | · | 20,162 Direct | · | Acquired | (price as of 2026-10-02) |
| March 10, 2012 | AMT | M | 5,284 | · | · | 18,827 Direct | +39.02% | Acquired | (price as of 2026-10-02) |
| March 10, 2012 | AMT | F | 1,707 | $62.22 | $106,210 | 17,120 Direct | -9.07% | Disposed | 160.7% (price as of 2026-10-02) |
| March 10, 2012 | AMT | M | 5,219 | · | · | 22,339 Direct | +30.48% | Acquired | (price as of 2026-10-02) |
| March 10, 2012 | AMT | F | 1,844 | $62.22 | $114,734 | 20,495 Direct | -8.25% | Disposed | 160.7% (price as of 2026-10-02) |
| March 10, 2012 | AMT | M | 5,170 | · | · | 25,665 Direct | +25.23% | Acquired | (price as of 2026-10-02) |
| March 10, 2012 | AMT | F | 2,187 | $62.22 | $136,075 | 23,478 Direct | -8.52% | Disposed | 160.7% (price as of 2026-10-02) |
| March 10, 2012 | AMT | M | 5,284 | · | · | 5,283 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| March 10, 2012 | AMT | M | 5,219 | · | · | 10,438 Direct | -33.33% | Disposed | (price as of 2026-10-02) |
| March 10, 2012 | AMT | M | 5,170 | · | · | 15,508 Direct | -25.00% | Disposed | (price as of 2026-10-02) |
| March 17, 2011 | AMT | M | 2,322 | · | · | 13,274 Direct | +21.20% | Acquired | (price as of 2026-10-02) |
| March 17, 2011 | AMT | F | 821 | $51.04 | $41,904 | 12,453 Direct | -6.19% | Disposed | 217.8% (price as of 2026-10-02) |
| March 17, 2011 | AMT | M | 2,322 | · | · | 2,322 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| March 10, 2011 | AMT | M | 5,284 | · | · | 9,517 Direct | +124.83% | Acquired | (price as of 2026-10-02) |
| March 10, 2011 | AMT | F | 1,602 | $50.78 | $81,350 | 7,915 Direct | -16.83% | Disposed | 219.4% (price as of 2026-10-02) |
| March 10, 2011 | AMT | M | 5,220 | · | · | 13,135 Direct | +65.95% | Acquired | (price as of 2026-10-02) |
| March 10, 2011 | AMT | F | 1,582 | $50.78 | $80,334 | 11,553 Direct | -12.04% | Disposed | 219.4% (price as of 2026-10-02) |
Showing latest 100 of 121 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 |
|---|---|---|---|---|---|---|---|
| Oct. 30, 2018 | AMT | Option to Purchase Common Stock | Common Stock | $50.78 | March 10, 2021 | 61,368 | Disposed |
| Oct. 30, 2018 | AMT | Option to Purchase Common Stock | Common Stock | $62.00 | March 12, 2022 | 71,798 | Disposed |
| Oct. 30, 2018 | AMT | Option to Purchase Common Stock | Common Stock | $43.11 | March 10, 2020 | 30,000 | Disposed |
| June 27, 2017 | AMT | Option to Purchase Common Stock | Common Stock | $28.39 | March 10, 2019 | 17,162 | Disposed |
| July 12, 2016 | AMT | Option to purchase common stock | Common Stock | $44.92 | Dec. 3, 2017 | 50,000 | Disposed |
| July 11, 2016 | AMT | Option to purchase common stock | Common Stock | $44.92 | Dec. 3, 2017 | 50,000 | Disposed |
| July 8, 2016 | AMT | Option to purchase common stock | Common Stock | $44.92 | Dec. 3, 2017 | 50,000 | Disposed |
| March 10, 2015 | AMT | Option to Purchase Common Stock | Common Stock | $94.57 | March 10, 2025 | 121,604 | Acquired |
| March 12, 2014 | AMT | Restricted Stock Units | Common Stock | · | · | 5,041 | Disposed |
| March 11, 2014 | AMT | Restricted Stock Units | Common Stock | · | · | 4,552 | Disposed |
| March 10, 2014 | AMT | Restricted Stock Units | Common Stock | · | · | 5,219 | Disposed |
| March 10, 2014 | AMT | Restricted Stock Units | Common Stock | · | · | 5,169 | Disposed |
| March 10, 2014 | AMT | Option to Purchase Common Stock | Common Stock | $81.18 | March 10, 2024 | 107,817 | Acquired |
| March 10, 2014 | AMT | Restricted Stock Units | Common Stock | · | · | 19,710 | Acquired |
| March 12, 2013 | AMT | Restricted Stock Units | Common Stock | · | · | 5,041 | Disposed |
| March 11, 2013 | AMT | Option to Purchase Common Stock | Common Stock | $76.90 | March 11, 2023 | 72,539 | Acquired |
| March 11, 2013 | AMT | Restricted Stock Units | Common Stock | · | · | 18,206 | Acquired |
| March 10, 2013 | AMT | Restricted Stock Units | Common Stock | · | · | 5,283 | Disposed |
| March 10, 2013 | AMT | Restricted Stock Units | Common Stock | · | · | 5,219 | Disposed |
| March 10, 2013 | AMT | Restricted Stock Units | Common Stock | · | · | 5,170 | Disposed |
| Aug. 1, 2012 | AMT | Option to Purchase Common Stock | Common Stock | $43.11 | March 10, 2020 | 30,000 | Disposed |
| July 10, 2012 | AMT | Option to Purchase Common Stock | Common Stock | $37.70 | March 17, 2018 | 32,500 | Disposed |
| June 29, 2012 | AMT | Option to Purchase Common Stock | Common Stock | $28.39 | March 10, 2019 | 51,488 | Disposed |
| March 17, 2012 | AMT | Restricted Stock Units | Common Stock | · | · | 2,322 | Disposed |
| March 12, 2012 | AMT | Option to Purchase Common Stock | Common Stock | $62.00 | March 12, 2022 | 71,798 | Acquired |
| March 12, 2012 | AMT | Restricted Stock Units | Common Stock | · | · | 20,162 | Acquired |
| March 10, 2012 | AMT | Restricted Stock Units | Common Stock | · | · | 5,284 | Disposed |
| March 10, 2012 | AMT | Restricted Stock Units | Common Stock | · | · | 5,219 | Disposed |
| March 10, 2012 | AMT | Restricted Stock Units | Common Stock | · | · | 5,170 | Disposed |
| March 17, 2011 | AMT | Restricted Stock Units | Class A Common Stock | · | · | 2,322 | Disposed |
| March 10, 2011 | AMT | Option to Purchase Class A Common Stock | Class A Common Stock | $50.78 | March 10, 2021 | 61,368 | Acquired |
| March 10, 2011 | AMT | Restricted Stock Units | Class A Common Stock | · | · | 20,678 | Acquired |
| March 10, 2011 | AMT | Restricted Stock Units | Class A Common Stock | · | · | 5,284 | Disposed |
| March 10, 2011 | AMT | Restricted Stock Units | Class A Common Stock | · | · | 5,220 | Disposed |
| March 17, 2010 | AMT | Restricted Stock Units | Class A Common Stock | · | · | 2,323 | Disposed |
| March 10, 2010 | AMT | Option to Purchase Class A Common Stock | Class A Common Stock | $43.11 | March 10, 2020 | 60,000 | Acquired |
| March 10, 2010 | AMT | Restricted Stock Units | Class A Common Stock | · | · | 20,877 | Acquired |
| March 10, 2010 | AMT | Restricted Stock Units | Class A Common Stock | · | · | 5,284 | Disposed |
| March 17, 2009 | AMT | Restricted Stock Units | Class A Common Stock | · | · | 2,323 | Disposed |
| March 10, 2009 | AMT | Option to Purchase Class A Common Stock | Class A Common Stock | $28.39 | March 10, 2019 | 68,650 | Acquired |
| March 10, 2009 | AMT | Restricted Stock Units | Class A Common Stock | · | · | 21,135 | Acquired |
| March 17, 2008 | AMT | Option to purchase Class A Common Stock | Class A Common Stock | $37.70 | March 17, 2018 | 32,500 | Acquired |
| March 17, 2008 | AMT | Restricted Stock Units | Class A Common Stock | · | · | 9,290 | Acquired |
| Dec. 3, 2007 | AMT | Option to Purchase Class A Common Stock | Class A Common Stock | $44.92 | Dec. 3, 2017 | 150,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2018 | $649,347 | · | · | · | $736,266 | · | $277,467 | $5,963,251 |
| 2017 | $664,300 | · | $4,000,060 | · | $864,586 | · | $208,417 | $5,737,363 |
| 2016 | $650,000 | · | $3,670,013 | · | $672,750 | · | $145,671 | $5,138,434 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.