Mitchall G. Clark
Insider
First SEC filing: May 18, 2016 · Latest: May 18, 2016
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 |
|---|---|---|---|---|---|---|---|---|---|
| May 18, 2018 | ATRA | S 10b5-1 | 25,860 | $50.03 | $1,293,776 | 107,972 Direct | -19.32% | Disposed | -99.2% (price as of 2026-10-06) |
| May 16, 2018 | ATRA | S 10b5-1 | 300 | $46.30 | $13,890 | 133,832 Direct | -0.22% | Disposed | -99.2% (price as of 2026-10-06) |
| May 16, 2018 | ATRA | S 10b5-1 | 4,347 | $46.04 | $200,136 | 134,132 Direct | -3.14% | Disposed | -99.2% (price as of 2026-10-06) |
| May 15, 2018 | ATRA | M | 4,808 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| May 15, 2018 | ATRA | M | 4,808 | · | · | 138,479 Direct | +3.60% | Acquired | (price as of 2026-10-06) |
| March 29, 2018 | ATRA | S 10b5-1 | 22,400 | $40.07 | $897,568 | 133,671 Direct | -14.35% | Disposed | -99.0% (price as of 2026-10-06) |
| March 27, 2018 | ATRA | M 10b5-1 | 11,406 | · | · | 3,125 Direct | -78.49% | Disposed | (price as of 2026-10-06) |
| March 27, 2018 | ATRA | M 10b5-1 | 32,500 | · | · | 32,500 Direct | -50.00% | Disposed | (price as of 2026-10-06) |
| March 27, 2018 | ATRA | M 10b5-1 | 28,848 | · | · | 11,194 Direct | -72.04% | Disposed | (price as of 2026-10-06) |
| March 27, 2018 | ATRA | S 10b5-1 | 11,103 | $41.10 | $456,333 | 156,071 Direct | -6.64% | Disposed | -99.1% (price as of 2026-10-06) |
| March 27, 2018 | ATRA | S 10b5-1 | 2,800 | $40.40 | $113,120 | 167,174 Direct | -1.65% | Disposed | -99.0% (price as of 2026-10-06) |
| March 27, 2018 | ATRA | S 10b5-1 | 2,170 | $39.53 | $85,780 | 169,974 Direct | -1.26% | Disposed | -99.0% (price as of 2026-10-06) |
| March 27, 2018 | ATRA | S 10b5-1 | 29,980 | $38.23 | $1,146,135 | 172,144 Direct | -14.83% | Disposed | -99.0% (price as of 2026-10-06) |
| March 27, 2018 | ATRA | S 10b5-1 | 31,356 | $37.10 | $1,163,308 | 202,124 Direct | -13.43% | Disposed | -98.9% (price as of 2026-10-06) |
| March 27, 2018 | ATRA | S 10b5-1 | 22,794 | $36.43 | $830,385 | 233,480 Direct | -8.89% | Disposed | -98.9% (price as of 2026-10-06) |
| March 27, 2018 | ATRA | M 10b5-1 | 11,406 | $11.00 | $125,466 | 256,274 Direct | +4.66% | Acquired | -96.5% (price as of 2026-10-06) |
| March 27, 2018 | ATRA | M 10b5-1 | 32,500 | $22.72 | $738,400 | 244,868 Direct | +15.30% | Acquired | -98.3% (price as of 2026-10-06) |
| March 27, 2018 | ATRA | M 10b5-1 | 28,848 | $25.15 | $725,527 | 212,368 Direct | +15.72% | Acquired | -98.5% (price as of 2026-10-06) |
| Feb. 15, 2018 | ATRA | M | 7,211 | · | · | 4,808 Direct | -60.00% | Disposed | (price as of 2026-10-06) |
| Feb. 15, 2018 | ATRA | F | 3,604 | $47.05 | $169,568 | 183,520 Direct | -1.93% | Disposed | -99.2% (price as of 2026-10-06) |
| Feb. 15, 2018 | ATRA | M | 7,211 | · | · | 187,124 Direct | +4.01% | Acquired | (price as of 2026-10-06) |
| Feb. 9, 2018 | ATRA | F | 3,704 | $41.70 | $154,457 | 179,913 Direct | -2.02% | Disposed | -99.1% (price as of 2026-10-06) |
| Feb. 6, 2018 | ATRA | A | 50,000 | · | · | 50,000 Direct | · | Acquired | (price as of 2026-10-06) |
| Feb. 6, 2018 | ATRA | F | 4,437 | $35.80 | $158,845 | 183,617 Direct | -2.36% | Disposed | -98.9% (price as of 2026-10-06) |
| Feb. 6, 2018 | ATRA | A | 25,000 | · | · | 188,054 Direct | +15.33% | Acquired | (price as of 2026-10-06) |
| Nov. 16, 2017 | ATRA | S | 3,290 | $14.20 | $46,718 | 163,052 Direct | -1.98% | Disposed | -97.3% (price as of 2026-10-06) |
| Nov. 15, 2017 | ATRA | M | 7,212 | · | · | 12,019 Direct | -37.50% | Disposed | (price as of 2026-10-06) |
| Nov. 15, 2017 | ATRA | M | 7,212 | · | · | 166,342 Direct | +4.53% | Acquired | (price as of 2026-10-06) |
| Aug. 16, 2017 | ATRA | S | 3,021 | $14.33 | $43,291 | 159,130 Direct | -1.86% | Disposed | -97.3% (price as of 2026-10-06) |
| Aug. 15, 2017 | ATRA | M | 7,211 | · | · | 19,231 Direct | -27.27% | Disposed | (price as of 2026-10-06) |
| Aug. 15, 2017 | ATRA | M | 7,211 | · | · | 162,151 Direct | +4.65% | Acquired | (price as of 2026-10-06) |
| May 16, 2017 | ATRA | S | 3,873 | $15.25 | $59,063 | 153,000 Direct | -2.47% | Disposed | -97.4% (price as of 2026-10-06) |
| May 15, 2017 | ATRA | M | 7,212 | · | · | 26,442 Direct | -21.43% | Disposed | (price as of 2026-10-06) |
| May 15, 2017 | ATRA | M | 7,212 | · | · | 156,873 Direct | +4.82% | Acquired | (price as of 2026-10-06) |
| Feb. 16, 2017 | ATRA | S | 3,059 | $15.96 | $48,822 | 149,661 Direct | -2.00% | Disposed | -97.6% (price as of 2026-10-06) |
| Feb. 15, 2017 | ATRA | M | 7,211 | · | · | 33,654 Direct | -17.65% | Disposed | (price as of 2026-10-06) |
| Feb. 15, 2017 | ATRA | M | 7,211 | · | · | 152,720 Direct | +4.96% | Acquired | (price as of 2026-10-06) |
| Feb. 6, 2017 | ATRA | A | 49,500 | · | · | 144,687 Direct | +52.00% | Acquired | (price as of 2026-10-06) |
| Nov. 16, 2016 | ATRA | S | 2,995 | $19.53 | $58,492 | 95,187 Direct | -3.05% | Disposed | -98.0% (price as of 2026-10-06) |
| Nov. 15, 2016 | ATRA | M | 7,212 | · | · | 40,865 Direct | -15.00% | Disposed | (price as of 2026-10-06) |
| Nov. 15, 2016 | ATRA | M | 7,212 | · | · | 98,182 Direct | +7.93% | Acquired | (price as of 2026-10-06) |
| Aug. 15, 2016 | ATRA | M | 7,211 | · | · | 48,077 Direct | -13.04% | Disposed | (price as of 2026-10-06) |
| Aug. 15, 2016 | ATRA | M | 7,211 | · | · | 90,970 Direct | +8.61% | Acquired | (price as of 2026-10-06) |
| May 16, 2016 | ATRA | M | 7,212 | · | · | 55,288 Direct | -11.54% | Disposed | (price as of 2026-10-06) |
| May 16, 2016 | ATRA | S 10b5-1 | 4,153 | $15.15 | $62,918 | 83,759 Direct | -4.72% | Disposed | -97.4% (price as of 2026-10-06) |
| May 16, 2016 | ATRA | M | 7,212 | · | · | 87,912 Direct | +8.94% | Acquired | (price as of 2026-10-06) |
| Feb. 16, 2016 | ATRA | M | 7,211 | · | · | 62,500 Direct | -10.34% | Disposed | (price as of 2026-10-06) |
| Feb. 16, 2016 | ATRA | S 10b5-1 | 4,153 | $15.35 | $63,749 | 80,700 Direct | -4.89% | Disposed | -97.5% (price as of 2026-10-06) |
| Feb. 16, 2016 | ATRA | M | 7,211 | · | · | 84,853 Direct | +9.29% | Acquired | (price as of 2026-10-06) |
| Feb. 9, 2016 | ATRA | A | 42,857 | · | · | 77,642 Direct | +123.21% | Acquired | (price as of 2026-10-06) |
| Dec. 17, 2015 | ATRA | A | 65,000 | · | · | 65,000 Direct | · | Acquired | (price as of 2026-10-06) |
| Nov. 16, 2015 | ATRA | M | 4,808 | · | · | 69,711 Direct | -6.45% | Disposed | (price as of 2026-10-06) |
| Nov. 16, 2015 | ATRA | S 10b5-1 | 4,153 | $31.67 | $131,526 | 34,785 Direct | -10.67% | Disposed | -98.8% (price as of 2026-10-06) |
| Nov. 16, 2015 | ATRA | M | 4,808 | · | · | 38,938 Direct | +14.09% | Acquired | (price as of 2026-10-06) |
| Aug. 17, 2015 | ATRA | M | 9,615 | · | · | 74,519 Direct | -11.43% | Disposed | (price as of 2026-10-06) |
| Aug. 17, 2015 | ATRA | M 10b5-1 | 1,291 | · | · | 40,042 Direct | -3.12% | Disposed | (price as of 2026-10-06) |
| Aug. 17, 2015 | ATRA | M 10b5-1 | 469 | · | · | 14,531 Direct | -3.13% | Disposed | (price as of 2026-10-06) |
| Aug. 17, 2015 | ATRA | S 10b5-1 | 7,829 | $46.19 | $361,622 | 34,130 Direct | -18.66% | Disposed | -99.2% (price as of 2026-10-06) |
| Aug. 17, 2015 | ATRA | M 10b5-1 | 469 | $11.00 | $5,159 | 41,959 Direct | +1.13% | Acquired | -96.5% (price as of 2026-10-06) |
| Aug. 17, 2015 | ATRA | M 10b5-1 | 1,291 | $25.15 | $32,469 | 41,490 Direct | +3.21% | Acquired | -98.5% (price as of 2026-10-06) |
| Aug. 17, 2015 | ATRA | M | 9,615 | · | · | 40,199 Direct | +31.44% | Acquired | (price as of 2026-10-06) |
| May 15, 2015 | ATRA | M | 31,250 | · | · | 84,134 Direct | +59.09% | Acquired | (price as of 2026-10-06) |
| May 15, 2015 | ATRA | F | 13,066 | $37.30 | $487,362 | 30,584 Direct | -29.93% | Disposed | -99.0% (price as of 2026-10-06) |
| May 15, 2015 | ATRA | M | 31,250 | · | · | 43,650 Direct | +252.02% | Acquired | (price as of 2026-10-06) |
| Jan. 16, 2015 | ATRA | M | 41,333 | · | · | 41,333 Direct | · | Acquired | (price as of 2026-10-06) |
| Jan. 16, 2015 | ATRA | A | 12,400 | · | · | 12,400 Direct | · | Acquired | (price as of 2026-10-06) |
| Oct. 21, 2014 | ATRA | A | 115,384 | · | · | 115,384 Direct | · | Acquired | (price as of 2026-10-06) |
| Oct. 15, 2014 | ATRA | M | 15,000 | · | · | 15,000 Direct | · | Acquired | (price as of 2026-10-06) |
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 |
|---|---|---|---|---|---|---|---|
| May 15, 2018 | ATRA | Restricted Stock Units | Common Stock | · | · | 4,808 | Disposed |
| March 27, 2018 | ATRA | Employee Stock Option (Right to Buy) | Common Stock | $11.00 | Oct. 14, 2021 | 11,406 | Disposed |
| March 27, 2018 | ATRA | Employee Stock Option (Right to Buy) | Common Stock | $22.72 | Dec. 17, 2022 | 32,500 | Disposed |
| March 27, 2018 | ATRA | Employee Stock Option (Right to Buy) | Common Stock | $25.15 | Jan. 16, 2022 | 28,848 | Disposed |
| Feb. 15, 2018 | ATRA | Restricted Stock Units | Common Stock | · | · | 7,211 | Disposed |
| Feb. 6, 2018 | ATRA | Employee Stock Option (Right to Buy) | Common Stock | $35.80 | Feb. 6, 2025 | 50,000 | Acquired |
| Nov. 15, 2017 | ATRA | Restricted Stock Unites | Common Stock | · | · | 7,212 | Disposed |
| Aug. 15, 2017 | ATRA | Restricted Stock Unites | Common Stock | · | · | 7,211 | Disposed |
| May 15, 2017 | ATRA | Restricted Stock Unites | Common Stock | · | · | 7,212 | Disposed |
| Feb. 15, 2017 | ATRA | Restricted Stock Unites | Common Stock | · | · | 7,211 | Disposed |
| Nov. 15, 2016 | ATRA | Restricted Stock Unites | Common Stock | · | · | 7,212 | Disposed |
| Aug. 15, 2016 | ATRA | Restricted Stock Unites | Common Stock | · | · | 7,211 | Disposed |
| May 16, 2016 | ATRA | Restricted Stock Unites | Common Stock | · | · | 7,212 | Disposed |
| Feb. 16, 2016 | ATRA | Restricted Stock Unites | Common Stock | · | · | 7,211 | Disposed |
| Dec. 17, 2015 | ATRA | Employee Stock Option (Right to Buy) | Common Stock | $22.72 | Dec. 17, 2022 | 65,000 | Acquired |
| Nov. 16, 2015 | ATRA | Restricted Stock Units | Common Stock | · | · | 4,808 | Disposed |
| Aug. 17, 2015 | ATRA | Restricted Stock Units | Common Stock | · | · | 9,615 | Disposed |
| Aug. 17, 2015 | ATRA | Employee Stock Option (Right to Buy) | Common Stock | $25.15 | Jan. 16, 2022 | 1,291 | Disposed |
| Aug. 17, 2015 | ATRA | Employee Stock Option (Right to Buy) | Common Stock | $11.00 | Oct. 14, 2021 | 469 | Disposed |
| May 15, 2015 | ATRA | Restricted Stock Units | Common Stock | · | · | 31,250 | Acquired |
| Jan. 16, 2015 | ATRA | Employee Stock Option (Right to Buy) | Common Stock | $25.15 | Jan. 16, 2022 | 41,333 | Acquired |
| Oct. 21, 2014 | ATRA | Restricted Stock Unit | Common Stock | · | · | 115,384 | Acquired |
| Oct. 15, 2014 | ATRA | Employee Stock Option (Right to Buy) | Common Stock | $11.00 | Oct. 14, 2021 | 15,000 | 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 |
|---|---|---|---|---|---|---|---|---|
| 2014 | $231,806 | $90,620 | $991,495 | $87,750 | · | · | $1,240 | $1,402,911 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.