William C Griffiths
CIK 1251789 · View on SEC EDGAR ↗
Insider
First SEC filing: Nov. 2, 2010 · Latest: Nov. 2, 2010
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 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. 4, 2023 | NX | S 10b5-1 | 28,296 | $32.20 | $911,131 | 52,619 Direct | -34.97% | Disposed | -35.4% (price as of 2026-08-19) |
| Dec. 1, 2023 | NX | S 10b5-1 | 24,108 | $31.25 | $753,375 | 80,915 Direct | -22.95% | Disposed | -33.5% (price as of 2026-08-19) |
| Nov. 15, 2023 | NX | S 10b5-1 | 5,892 | $31.04 | $182,888 | 105,023 Direct | -5.31% | Disposed | -33.0% (price as of 2026-08-19) |
| Nov. 14, 2023 | NX | S 10b5-1 | 25,000 | $30.23 | $755,750 | 110,915 Direct | -18.39% | Disposed | -31.2% (price as of 2026-08-19) |
| Sept. 1, 2023 | NX | S 10b5-1 | 25,000 | $29.09 | $727,250 | 135,915 Direct | -15.54% | Disposed | -28.5% (price as of 2026-08-19) |
| Aug. 1, 2023 | NX | S 10b5-1 | 6,321 | $28.09 | $177,557 | 160,915 Direct | -3.78% | Disposed | -26.0% (price as of 2026-08-19) |
| July 31, 2023 | NX | S 10b5-1 | 16,071 | $28.09 | $451,434 | 167,236 Direct | -8.77% | Disposed | -26.0% (price as of 2026-08-19) |
| July 28, 2023 | NX | S 10b5-1 | 806 | $28.05 | $22,608 | 183,307 Direct | -0.44% | Disposed | -25.9% (price as of 2026-08-19) |
| July 27, 2023 | NX | S 10b5-1 | 725 | $28.02 | $20,314 | 184,113 Direct | -0.39% | Disposed | -25.8% (price as of 2026-08-19) |
| July 26, 2023 | NX | S 10b5-1 | 2 | $28.01 | $56 | 184,838 Direct | 0.00% | Disposed | -25.8% (price as of 2026-08-19) |
| July 20, 2023 | NX | S 10b5-1 | 162 | $28.06 | $4,546 | 184,840 Direct | -0.09% | Disposed | -25.9% (price as of 2026-08-19) |
| July 18, 2023 | NX | S 10b5-1 | 913 | $28.03 | $25,591 | 185,002 Direct | -0.49% | Disposed | -25.8% (price as of 2026-08-19) |
| June 30, 2023 | NX | S 10b5-1 | 15,777 | $27.12 | $427,872 | 185,915 Direct | -7.82% | Disposed | -23.3% (price as of 2026-08-19) |
| June 29, 2023 | NX | S 10b5-1 | 9,223 | $27.03 | $249,298 | 201,692 Direct | -4.37% | Disposed | -23.1% (price as of 2026-08-19) |
| June 14, 2023 | NX | S 10b5-1 | 13,393 | $26.29 | $352,102 | 210,915 Direct | -5.97% | Disposed | -20.9% (price as of 2026-08-19) |
| June 13, 2023 | NX | S 10b5-1 | 26,607 | $26.81 | $713,334 | 224,308 Direct | -10.60% | Disposed | -22.5% (price as of 2026-08-19) |
| Feb. 13, 2023 | NX | S 10b5-1 | 300 | $27.00 | $8,100 | 250,915 Direct | -0.12% | Disposed | -23.0% (price as of 2026-08-19) |
| Feb. 3, 2023 | NX | S 10b5-1 | 1,000 | $27.02 | $27,020 | 251,215 Direct | -0.40% | Disposed | -23.1% (price as of 2026-08-19) |
| Feb. 2, 2023 | NX | S 10b5-1 | 404 | $27.01 | $10,912 | 252,215 Direct | -0.16% | Disposed | -23.0% (price as of 2026-08-19) |
| May 10, 2021 | NX | S 10b5-1 | 100 | $29.00 | $2,900 | 233,536 Direct | -0.04% | Disposed | -28.3% (price as of 2026-08-19) |
| Feb. 24, 2021 | NX | S 10b5-1 | 5,602 | $25.03 | $140,218 | 233,636 Direct | -2.34% | Disposed | -16.9% (price as of 2026-08-19) |
| Feb. 23, 2021 | NX | S 10b5-1 | 34,496 | $24.59 | $848,257 | 233,636 Direct | -12.87% | Disposed | -15.5% (price as of 2026-08-19) |
| Feb. 22, 2021 | NX | S 10b5-1 | 23,605 | $24.75 | $584,224 | 233,636 Direct | -9.18% | Disposed | -16.0% (price as of 2026-08-19) |
| Feb. 19, 2021 | NX | S 10b5-1 | 18,213 | $24.32 | $442,940 | 233,636 Direct | -7.23% | Disposed | -14.5% (price as of 2026-08-19) |
| Feb. 17, 2021 | NX | S 10b5-1 | 29,941 | $24.10 | $721,578 | 233,636 Direct | -11.36% | Disposed | -13.7% (price as of 2026-08-19) |
| Feb. 16, 2021 | NX | S 10b5-1 | 26,744 | $24.44 | $653,623 | 233,636 Direct | -10.27% | Disposed | -14.9% (price as of 2026-08-19) |
| Feb. 12, 2021 | NX | S 10b5-1 | 45,657 | $24.68 | $1,126,815 | 233,636 Direct | -16.35% | Disposed | -15.8% (price as of 2026-08-19) |
| Feb. 11, 2021 | NX | S 10b5-1 | 26,024 | $24.35 | $633,684 | 233,636 Direct | -10.02% | Disposed | -14.6% (price as of 2026-08-19) |
| Feb. 10, 2021 | NX | S 10b5-1 | 15,792 | $24.46 | $386,272 | 233,636 Direct | -6.33% | Disposed | -15.0% (price as of 2026-08-19) |
| Feb. 9, 2021 | NX | S 10b5-1 | 28,750 | $24.71 | $710,412 | 233,636 Direct | -10.96% | Disposed | -15.9% (price as of 2026-08-19) |
| Feb. 8, 2021 | NX | S 10b5-1 | 37,576 | $24.97 | $938,273 | 233,636 Direct | -13.85% | Disposed | -16.7% (price as of 2026-08-19) |
| Dec. 24, 2020 | NX | S | 22,186 | $22.51 | $499,407 | 233,636 Direct | -8.67% | Disposed | -7.6% (price as of 2026-08-19) |
| Dec. 23, 2020 | NX | S | 41,664 | $22.51 | $937,857 | 233,636 Direct | -15.13% | Disposed | -7.6% (price as of 2026-08-19) |
| Dec. 21, 2020 | NX | S | 11,150 | $22.50 | $250,875 | 233,636 Direct | -4.55% | Disposed | -7.6% (price as of 2026-08-19) |
| Dec. 18, 2020 | NX | S | 100,000 | $22.67 | $2,267,000 | 233,636 Direct | -29.97% | Disposed | -8.3% (price as of 2026-08-19) |
| Dec. 17, 2020 | NX | S | 5,987 | $22.51 | $134,767 | 233,636 Direct | -2.50% | Disposed | -7.6% (price as of 2026-08-19) |
| Dec. 17, 2020 | NX | S | 8,132 | $22.51 | $183,051 | 233,636 Direct | -3.36% | Disposed | -7.6% (price as of 2026-08-19) |
| Oct. 2, 2020 | NX | S | 6,390 | $18.82 | $120,260 | 229,280 Direct | -2.71% | Disposed | 10.5% (price as of 2026-08-19) |
Showing latest 100 of 128 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 |
|---|---|---|---|---|---|---|---|
| Nov. 1, 2023 | NX | Restricted Stock Units | Common Stock (3,745) | — | — | 3,745 | Acquired |
| Nov. 1, 2022 | NX | Restricted Stock Units | Common Stock (4,838) | — | — | 4,838 | Acquired |
| Feb. 24, 2021 | NX | Stock Options (Right to Buy) | Common Stock (5,602) | $19.45 | Nov. 30, 2026 | 5,602 | Disposed |
| Feb. 23, 2021 | NX | Stock Options (Right to Buy) | Common Stock (34,496) | $19.45 | Nov. 30, 2026 | 34,496 | Disposed |
| Feb. 22, 2021 | NX | Stock Options (Right to Buy) | Common Stock (23,605) | $19.45 | Nov. 30, 2026 | 23,605 | Disposed |
| Feb. 19, 2021 | NX | Stock Options (Right to Buy) | Common Stock (18,213) | $19.45 | Nov. 30, 2026 | 18,213 | Disposed |
| Feb. 17, 2021 | NX | Stock Options (Right to Buy) | Common Stock (20,184) | $19.45 | Nov. 30, 2026 | 20,184 | Disposed |
| Feb. 17, 2021 | NX | Stock Options (Right to Buy) | Common Stock (9,757) | $19.31 | Dec. 2, 2025 | 9,757 | Disposed |
| Feb. 16, 2021 | NX | Stock Options (Right to Buy) | Common Stock (26,744) | $19.31 | Dec. 2, 2025 | 26,744 | Disposed |
| Feb. 12, 2021 | NX | Stock Options (Right to Buy) | Common Stock (45,657) | $19.31 | Dec. 2, 2025 | 45,657 | Disposed |
| Feb. 11, 2021 | NX | Stock Options (Right to Buy) | Common Stock (22,482) | $20.28 | Dec. 3, 2024 | 22,482 | Disposed |
| Feb. 11, 2021 | NX | Stock Options (Right to Buy) | Common Stock (3,542) | $19.31 | Dec. 2, 2025 | 3,542 | Disposed |
| Feb. 10, 2021 | NX | Stock Options (Right to Buy) | Common Stock (15,792) | $20.28 | Dec. 3, 2024 | 15,792 | Disposed |
| Feb. 9, 2021 | NX | Stock Options (Right to Buy) | Common Stock (10,026) | $20.28 | Dec. 3, 2024 | 10,026 | Disposed |
| Feb. 9, 2021 | NX | Stock Options (Right to Buy) | Common Stock (18,724) | $17.63 | Dec. 5, 2023 | 18,724 | Disposed |
| Feb. 8, 2021 | NX | Stock Options (Right to Buy) | Common Stock (37,076) | $17.63 | Dec. 5, 2023 | 37,076 | Disposed |
| Feb. 8, 2021 | NX | Stock Options (Right to Buy) | Common Stock (500) | $16.72 | July 9, 2023 | 500 | Disposed |
| Dec. 24, 2020 | NX | Stock Options (Right to Buy) | Common Stock (22,186) | $16.72 | July 9, 2023 | 22,186 | Disposed |
| Dec. 23, 2020 | NX | Stock Options (Right to Buy) | Common Stock (41,664) | $16.72 | July 9, 2023 | 41,664 | Disposed |
| Dec. 21, 2020 | NX | Stock Options (Right to Buy) | Common Stock (11,150) | $16.72 | July 9, 2023 | 11,150 | Disposed |
| Dec. 18, 2020 | NX | Stock Options (Right to Buy) | Common Stock (100,000) | $16.72 | July 9, 2023 | 100,000 | Disposed |
| Dec. 17, 2020 | NX | Stock Options (Right to Buy) | Common Stock (5,987) | $19.77 | Oct. 31, 2022 | 5,987 | Disposed |
| Dec. 17, 2020 | NX | Stock Options (Right to Buy) | Common Stock (8,132) | $14.75 | Oct. 31, 2021 | 8,132 | Disposed |
| Oct. 2, 2020 | NX | Stock Options (Right to Buy) | Common Stock (6,390) | $18.02 | Oct. 29, 2020 | 6,390 | Disposed |
| June 28, 2019 | NX | Stock Options (Right to Buy) | Common Stock (5,000) | $15.58 | Feb. 26, 2020 | 5,000 | Disposed |
| June 28, 2019 | NX | Stock Options (Right to Buy) | Common Stock (5,489) | $14.87 | Oct. 30, 2019 | 5,489 | Disposed |
| Nov. 30, 2016 | NX | Stock Options (Right to Buy) | Common Stock (102,100) | $19.45 | Nov. 30, 2026 | 102,100 | Acquired |
| Dec. 2, 2015 | NX | Stock Options (Right to Buy) | Common Stock (85,700) | $19.31 | Dec. 2, 2025 | 85,700 | Acquired |
| Dec. 3, 2014 | NX | Stock Options (Right to Buy) | Common Stock (48,300) | $20.28 | Dec. 3, 2024 | 48,300 | Acquired |
| Dec. 5, 2013 | NX | Stock Options (Right to Buy) | Common Stock (55,800) | $17.63 | Dec. 5, 2023 | 55,800 | Acquired |
| July 9, 2013 | NX | Stock Options (Right to Buy) | Common Stock (175,500) | $16.72 | July 9, 2023 | 175,500 | Acquired |
| Oct. 31, 2012 | NX | Restricted Stock Units | Common Stock (1,272) | — | — | 1,272 | Acquired |
| Oct. 31, 2012 | NX | Stock Options (Right to Buy) | Common Stock (5,987) | $19.77 | Oct. 31, 2022 | 5,987 | Acquired |
| Oct. 31, 2011 | NX | Restricted Stock Units | Common Stock (1,713) | — | — | 1,713 | Acquired |
| Oct. 31, 2011 | NX | Stock Options (Right to Buy) | Common Stock (8,132) | $14.75 | Oct. 31, 2021 | 8,132 | Acquired |
| Oct. 29, 2010 | NX | Stock Options (Right to Buy) | Common Stock (6,390) | $18.02 | Oct. 29, 2020 | 6,390 | Acquired |
| Oct. 29, 2010 | NX | Restricted Stock Units | Common Stock (1,398) | — | — | 1,398 | Acquired |
| Feb. 26, 2010 | NX | Stock Options (Right to Buy) | Common Stock (5,000) | $15.58 | Feb. 26, 2020 | 5,000 | Acquired |
| Oct. 30, 2009 | NX | Stock Options (Right to Buy) | Common Stock (5,489) | $14.87 | Oct. 30, 2019 | 5,489 | Acquired |
| Oct. 30, 2009 | NX | Stock Options (Right to Buy) | Common Stock (5,489) | $14.87 | Oct. 30, 2019 | 5,489 | Acquired |
| Oct. 30, 2009 | NX | Restricted Stock Units | Common Stock (1,571) | — | — | 1,571 | 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 |
|---|---|---|---|---|---|---|---|---|
| 2019 | $815,000 | — | $1,146,283 | — | $838,795 | $66,245 | $60,140 | $2,926,463 |
| 2018 | $815,000 | — | $1,535,940 | — | $1,391,312 | $168,039 | $44,725 | $3,952,016 |
| 2017 | $815,000 | — | $1,398,744 | $569,905 | $254,043 | $109,202 | $41,907 | $3,188,801 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.