Gregory C Walker
Insider
First SEC filing: May 4, 2017 · Latest: May 4, 2017
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 |
|---|---|---|---|---|---|---|---|---|---|
| July 1, 2018 | PDFS | F | 407 | $11.98 | $4,876 | 21,468 Direct | -1.86% | Disposed | 363.3% (price as of 2026-10-02) |
| June 1, 2018 | PDFS | F | 1,330 | $13.07 | $17,383 | 21,875 Direct | -5.73% | Disposed | 324.6% (price as of 2026-10-02) |
| Jan. 1, 2018 | PDFS | F | 206 | $15.70 | $3,234 | 21,707 Direct | -0.94% | Disposed | 253.5% (price as of 2026-10-02) |
| Dec. 1, 2017 | PDFS | F | 659 | $16.93 | $11,157 | 21,913 Direct | -2.92% | Disposed | 227.8% (price as of 2026-10-02) |
| July 1, 2017 | PDFS | F | 442 | $16.45 | $7,271 | 21,658 Direct | -2.00% | Disposed | 237.4% (price as of 2026-10-02) |
| June 1, 2017 | PDFS | A | 5,513 | · | · | 24,024 Direct | +29.78% | Acquired | (price as of 2026-10-02) |
| June 1, 2017 | PDFS | F | 1,924 | $16.50 | $31,746 | 22,100 Direct | -8.01% | Disposed | 236.4% (price as of 2026-10-02) |
| May 1, 2017 | PDFS | F | 320 | $17.58 | $5,626 | 18,511 Direct | -1.70% | Disposed | 215.7% (price as of 2026-10-02) |
| Jan. 1, 2017 | PDFS | F | 205 | $22.55 | $4,623 | 13,108 Direct | -1.54% | Disposed | 146.1% (price as of 2026-10-02) |
| Dec. 1, 2016 | PDFS | F | 659 | $21.95 | $14,465 | 13,313 Direct | -4.72% | Disposed | 152.8% (price as of 2026-10-02) |
| Nov. 8, 2016 | PDFS | S | 6,229 | $19.85 | $123,646 | 13,972 Direct | -30.84% | Disposed | 179.6% (price as of 2026-10-02) |
| Nov. 1, 2016 | PDFS | F | 327 | $19.32 | $6,318 | 20,201 Direct | -1.59% | Disposed | 187.3% (price as of 2026-10-02) |
| Sept. 12, 2016 | PDFS | S | 2,665 | $15.90 | $42,374 | 20,528 Direct | -11.49% | Disposed | 249.1% (price as of 2026-10-02) |
| Aug. 9, 2016 | PDFS | S | 2,382 | $17.00 | $40,494 | 23,193 Direct | -9.31% | Disposed | 226.5% (price as of 2026-10-02) |
| July 1, 2016 | PDFS | A | 6,563 | · | · | 25,365 Direct | +34.91% | Acquired | (price as of 2026-10-02) |
| July 1, 2016 | PDFS | F | 265 | $14.14 | $3,747 | 25,100 Direct | -1.04% | Disposed | 292.5% (price as of 2026-10-02) |
| June 1, 2016 | PDFS | F | 1,412 | $15.03 | $21,222 | 18,802 Direct | -6.99% | Disposed | 269.3% (price as of 2026-10-02) |
| May 28, 2016 | PDFS | F | 638 | $14.44 | $9,213 | 20,214 Direct | -3.06% | Disposed | 284.3% (price as of 2026-10-02) |
| May 1, 2016 | PDFS | F | 346 | $13.45 | $4,654 | 20,852 Direct | -1.63% | Disposed | 312.6% (price as of 2026-10-02) |
| Dec. 1, 2015 | PDFS | F | 913 | $11.22 | $10,244 | 19,765 Direct | -4.42% | Disposed | 394.7% (price as of 2026-10-02) |
| Nov. 1, 2015 | PDFS | F | 454 | $10.56 | $4,794 | 21,152 Direct | -2.10% | Disposed | 425.6% (price as of 2026-10-02) |
| Nov. 1, 2015 | PDFS | F | 454 | $10.56 | $4,794 | 20,678 Direct | -2.15% | Disposed | 425.6% (price as of 2026-10-02) |
| June 1, 2015 | PDFS | A | 9,750 | · | · | 22,684 Direct | +75.38% | Acquired | (price as of 2026-10-02) |
| June 1, 2015 | PDFS | F | 1,552 | $16.48 | $25,577 | 21,132 Direct | -6.84% | Disposed | 236.8% (price as of 2026-10-02) |
| May 28, 2015 | PDFS | F | 908 | $16.12 | $14,637 | 12,934 Direct | -6.56% | Disposed | 244.3% (price as of 2026-10-02) |
| May 1, 2015 | PDFS | F | 454 | $16.50 | $7,491 | 13,842 Direct | -3.18% | Disposed | 236.4% (price as of 2026-10-02) |
| Feb. 23, 2015 | PDFS | M | 117,401 | $6.09 | $714,972 | 131,697 Direct | +821.22% | Acquired | 811.3% (price as of 2026-10-02) |
| Feb. 23, 2015 | PDFS | S | 117,401 | $17.52 | $2,056,866 | 14,296 Direct | -89.14% | Disposed | 216.8% (price as of 2026-10-02) |
| Feb. 23, 2015 | PDFS | M | 117,401 | · | · | 33,750 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 20, 2015 | PDFS | M | 9,006 | $6.09 | $54,847 | 23,302 Direct | +63.00% | Acquired | 811.3% (price as of 2026-10-02) |
| Feb. 20, 2015 | PDFS | S | 9,006 | $17.75 | $159,856 | 14,296 Direct | -38.65% | Disposed | 212.7% (price as of 2026-10-02) |
| Feb. 20, 2015 | PDFS | M | 9,006 | · | · | 151,151 Direct | +6.34% | Acquired | (price as of 2026-10-02) |
| Feb. 19, 2015 | PDFS | M | 12,343 | $6.09 | $75,169 | 31,467 Direct | +64.54% | Acquired | 811.3% (price as of 2026-10-02) |
| Feb. 19, 2015 | PDFS | S | 1,612 | $17.91 | $28,871 | 29,855 Direct | -5.12% | Disposed | 209.9% (price as of 2026-10-02) |
| Feb. 19, 2015 | PDFS | S | 100 | $17.92 | $1,792 | 29,755 Direct | -0.33% | Disposed | 209.7% (price as of 2026-10-02) |
| Feb. 19, 2015 | PDFS | S | 200 | $17.90 | $3,580 | 29,555 Direct | -0.67% | Disposed | 210.1% (price as of 2026-10-02) |
| Feb. 19, 2015 | PDFS | S | 2,916 | $17.89 | $52,167 | 26,639 Direct | -9.87% | Disposed | 210.2% (price as of 2026-10-02) |
| Feb. 19, 2015 | PDFS | S | 18 | $12343.00 | $222,174 | 14,296 Direct | -0.13% | Disposed | -99.6% (price as of 2026-10-02) |
| Feb. 19, 2015 | PDFS | M | 12,343 | · | · | 160,157 Direct | +8.35% | Acquired | (price as of 2026-10-02) |
| Dec. 1, 2014 | PDFS | F | 353 | $12.67 | $4,473 | 18,233 Direct | -1.90% | Disposed | 338.0% (price as of 2026-10-02) |
| Nov. 1, 2014 | PDFS | F | 327 | $12.97 | $4,241 | 18,586 Direct | -1.73% | Disposed | 327.9% (price as of 2026-10-02) |
| June 1, 2014 | PDFS | A | 12,375 | · | · | 18,950 Direct | +188.21% | Acquired | (price as of 2026-10-02) |
| June 1, 2014 | PDFS | F | 459 | $19.92 | $9,143 | 18,491 Direct | -2.42% | Disposed | 178.6% (price as of 2026-10-02) |
| May 28, 2014 | PDFS | F | 654 | $20.07 | $13,126 | 6,575 Direct | -9.05% | Disposed | 176.5% (price as of 2026-10-02) |
| May 1, 2014 | PDFS | F | 327 | $18.93 | $6,190 | 7,229 Direct | -4.33% | Disposed | 193.2% (price as of 2026-10-02) |
| Feb. 11, 2014 | PDFS | S | 2,319 | $23.11 | $53,592 | 7,556 Direct | -23.48% | Disposed | 140.2% (price as of 2026-10-02) |
| Nov. 8, 2013 | PDFS | M | 3,750 | $6.09 | $22,838 | 15,598 Direct | +31.65% | Acquired | 811.3% (price as of 2026-10-02) |
| Nov. 8, 2013 | PDFS | S | 4,292 | $22.80 | $97,858 | 11,306 Direct | -27.52% | Disposed | 143.4% (price as of 2026-10-02) |
| Nov. 8, 2013 | PDFS | M | 3,750 | · | · | 172,500 Direct | +2.22% | Acquired | (price as of 2026-10-02) |
| Nov. 8, 2013 | PDFS | M | 3,750 | $6.09 | $22,838 | 15,598 Direct | +31.65% | Acquired | 811.3% (price as of 2026-10-02) |
| Nov. 8, 2013 | PDFS | S | 4,292 | $22.80 | $97,858 | 7,556 Direct | -36.23% | Disposed | 143.4% (price as of 2026-10-02) |
| Nov. 8, 2013 | PDFS | M | 3,750 | · | · | 172,500 Direct | +2.22% | Acquired | (price as of 2026-10-02) |
| Nov. 1, 2013 | PDFS | F | 327 | $22.80 | $7,456 | 11,848 Direct | -2.69% | Disposed | 143.4% (price as of 2026-10-02) |
| Aug. 1, 2013 | PDFS | S | 1,181 | $20.83 | $24,600 | 12,175 Direct | -8.84% | Disposed | 166.4% (price as of 2026-10-02) |
| June 7, 2013 | PDFS | S | 1,086 | $18.28 | $19,852 | 12,175 Direct | -8.19% | Disposed | 203.6% (price as of 2026-10-02) |
| May 28, 2013 | PDFS | A | 13,915 | · | · | 13,915 Direct | · | Acquired | (price as of 2026-10-02) |
| May 28, 2013 | PDFS | F | 654 | $18.59 | $12,158 | 13,261 Direct | -4.70% | Disposed | 198.5% (price as of 2026-10-02) |
| April 30, 2013 | PDFS | S | 2,688 | $17.05 | $45,830 | 0 Direct | -100.00% | Disposed | 225.5% (price as of 2026-10-02) |
| April 30, 2013 | PDFS | S | 2,688 | $17.05 | $45,830 | 0 Direct | -100.00% | Disposed | 225.5% (price as of 2026-10-02) |
| Dec. 3, 2012 | PDFS | M | 3,750 | $6.09 | $22,838 | 6,392 Direct | +141.94% | Acquired | 811.3% (price as of 2026-10-02) |
| Dec. 3, 2012 | PDFS | S | 3,750 | $14.56 | $54,600 | 2,642 Direct | -58.67% | Disposed | 281.2% (price as of 2026-10-02) |
| Dec. 3, 2012 | PDFS | S | 2,462 | $14.59 | $35,921 | 0 Direct | -100.00% | Disposed | 280.4% (price as of 2026-10-02) |
| Dec. 3, 2012 | PDFS | M | 3,750 | · | · | 176,250 Direct | +2.17% | Acquired | (price as of 2026-10-02) |
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. 23, 2015 | PDFS | Stock Options (Right to Buy) | Common Stock | $6.09 | Nov. 15, 2021 | 117,401 | Acquired |
| Feb. 20, 2015 | PDFS | Stock Options (Right to Buy) | Common Stock | $6.09 | Nov. 15, 2021 | 9,006 | Acquired |
| Feb. 19, 2015 | PDFS | Stock Options (Right to Buy) | Common Stock | $6.09 | Nov. 15, 2021 | 12,343 | Acquired |
| Nov. 8, 2013 | PDFS | Stock Options (Right to Buy) | Common Stock | $6.09 | Nov. 7, 2022 | 3,750 | Acquired |
| Nov. 8, 2013 | PDFS | Stock Options (Right to Buy) | Common Stock | $6.09 | Nov. 7, 2022 | 3,750 | Acquired |
| Dec. 3, 2012 | PDFS | Stock Options (Right to Buy) | Common Stock | $6.09 | Nov. 15, 2021 | 3,750 | 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 | $275,000 | · | · | · | · | · | $55,338 | $330,338 |
| 2016 | $330,000 | · | $92,801 | · | · | · | $192 | $422,993 |
| 2015 | $325,000 | $4,875 | $160,680 | · | · | · | $144 | $490,699 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.