Tim Chao-Ming Chen
Insider
First SEC filing: Nov. 3, 2021 · Latest: Nov. 3, 2021
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 |
|---|---|---|---|---|---|---|---|---|---|
| Sept. 1, 2026 | NRDS | F | 7,723 | $9.78 | $75,531 | 539,160 Direct | -1.41% | Disposed | -9.7% (price as of 2026-10-05) |
| June 1, 2026 | NRDS | F | 15,309 | $8.75 | $133,954 | 546,883 Direct | -2.72% | Disposed | 0.9% (price as of 2026-10-05) |
| March 2, 2026 | NRDS | F | 11,095 | $11.08 | $122,933 | 562,192 Direct | -1.94% | Disposed | -20.3% (price as of 2026-10-05) |
| Dec. 2, 2025 | NRDS | F | 15,309 | $15.41 | $235,912 | 573,287 Direct | -2.60% | Disposed | -42.7% (price as of 2026-10-05) |
| Nov. 24, 2025 | NRDS | G | 3,741,387 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-05) |
| Nov. 24, 2025 | NRDS | G | 2,740,027 | · | · | 19,380,838 Indirect | +16.47% | Acquired | (price as of 2026-10-05) |
| Nov. 24, 2025 | NRDS | G | 1,001,360 | · | · | 3,640,481 Indirect | +37.94% | Acquired | (price as of 2026-10-05) |
| Sept. 2, 2025 | NRDS | F | 15,310 | $10.26 | $157,081 | 588,596 Direct | -2.54% | Disposed | -13.9% (price as of 2026-10-05) |
| June 2, 2025 | NRDS | F | 15,309 | $10.52 | $161,051 | 603,906 Direct | -2.47% | Disposed | -16.1% (price as of 2026-10-05) |
| March 3, 2025 | NRDS | F | 11,077 | $10.09 | $111,767 | 619,215 Direct | -1.76% | Disposed | -12.5% (price as of 2026-10-05) |
| Dec. 2, 2024 | NRDS | F | 15,310 | $14.04 | $214,952 | 630,292 Direct | -2.37% | Disposed | -37.1% (price as of 2026-10-05) |
| Sept. 3, 2024 | NRDS | F | 14,485 | $12.60 | $182,511 | 645,602 Direct | -2.19% | Disposed | -29.9% (price as of 2026-10-05) |
| June 3, 2024 | NRDS | F | 10,779 | $13.89 | $149,720 | 660,087 Direct | -1.61% | Disposed | -36.4% (price as of 2026-10-05) |
| March 1, 2024 | NRDS | F | 10,930 | $16.91 | $184,826 | 670,866 Direct | -1.60% | Disposed | -47.8% (price as of 2026-10-05) |
| Dec. 12, 2023 | NRDS | G | 4,405,720 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-05) |
| Dec. 12, 2023 | NRDS | G | 1,468,573 | · | · | 1,468,573 Indirect | · | Acquired | (price as of 2026-10-05) |
| Dec. 12, 2023 | NRDS | G | 1,468,573 | · | · | 1,468,573 Indirect | · | Acquired | (price as of 2026-10-05) |
| Dec. 12, 2023 | NRDS | G | 1,468,574 | · | · | 1,468,574 Indirect | · | Acquired | (price as of 2026-10-05) |
| Dec. 12, 2023 | NRDS | G | 1,319,560 | · | · | 1,319,561 Indirect | -50.00% | Disposed | (price as of 2026-10-05) |
| Dec. 12, 2023 | NRDS | G | 1,319,560 | · | · | 1,319,560 Indirect | · | Acquired | (price as of 2026-10-05) |
| Dec. 12, 2023 | NRDS | G | 1,932,076 | · | · | 16,744,369 Indirect | -10.34% | Disposed | (price as of 2026-10-05) |
| Dec. 12, 2023 | NRDS | G | 966,038 | · | · | 966,038 Indirect | · | Acquired | (price as of 2026-10-05) |
| Dec. 12, 2023 | NRDS | G | 966,038 | · | · | 966,038 Indirect | · | Acquired | (price as of 2026-10-05) |
| Dec. 5, 2023 | NRDS | F | 13,377 | $12.08 | $161,594 | 681,796 Direct | -1.92% | Disposed | -26.9% (price as of 2026-10-05) |
| Sept. 12, 2023 | NRDS | P | 6,650 | $8.21 | $54,596 | 695,173 Direct | +0.97% | Acquired | 7.6% (price as of 2026-10-05) |
| Sept. 11, 2023 | NRDS | P | 23,938 | $8.40 | $201,079 | 688,523 Direct | +3.60% | Acquired | 5.1% (price as of 2026-10-05) |
| Sept. 1, 2023 | NRDS | F | 10,446 | $9.14 | $95,476 | 664,585 Direct | -1.55% | Disposed | -3.4% (price as of 2026-10-05) |
| June 1, 2023 | NRDS | F | 10,446 | $9.58 | $100,073 | 675,031 Direct | -1.52% | Disposed | -7.8% (price as of 2026-10-05) |
| May 9, 2023 | NRDS | P | 30,838 | $8.38 | $258,422 | 685,477 Direct | +4.71% | Acquired | 5.4% (price as of 2026-10-05) |
| March 15, 2023 | NRDS | A | 234,785 | · | · | 645,639 Direct | +57.15% | Acquired | (price as of 2026-10-05) |
| March 1, 2023 | NRDS | F | 5,322 | $20.42 | $108,675 | 410,854 Direct | -1.28% | Disposed | -56.8% (price as of 2026-10-05) |
| Dec. 16, 2022 | NRDS | P | 26,888 | $9.29 | $249,790 | 416,176 Direct | +6.91% | Acquired | -5.0% (price as of 2026-10-05) |
| Dec. 1, 2022 | NRDS | F | 5,042 | $13.17 | $66,403 | 389,288 Direct | -1.28% | Disposed | -33.0% (price as of 2026-10-05) |
| Sept. 1, 2022 | NRDS | F | 5,177 | $10.28 | $53,220 | 394,330 Direct | -1.30% | Disposed | -14.1% (price as of 2026-10-05) |
| Aug. 11, 2022 | NRDS | P | 10,000 | $9.85 | $98,500 | 399,507 Direct | +2.57% | Acquired | -10.4% (price as of 2026-10-05) |
| Aug. 9, 2022 | NRDS | P | 30,000 | $9.60 | $288,000 | 389,507 Direct | +8.34% | Acquired | -8.0% (price as of 2026-10-05) |
| July 1, 2022 | NRDS | A | 239,507 | · | · | 359,507 Direct | +199.59% | Acquired | (price as of 2026-10-05) |
| July 1, 2022 | NRDS | A | 11,990 | · | · | 11,990 Direct | · | Acquired | (price as of 2026-10-05) |
| July 1, 2022 | NRDS | A | 586,778 | · | · | 586,778 Direct | · | Acquired | (price as of 2026-10-05) |
| March 16, 2022 | NRDS | P | 10,000 | $10.60 | $106,000 | 120,000 Direct | +9.09% | Acquired | -16.7% (price as of 2026-10-05) |
| March 15, 2022 | NRDS | P | 10,000 | $10.58 | $105,800 | 120,000 Direct | +9.09% | Acquired | -16.5% (price as of 2026-10-05) |
| March 14, 2022 | NRDS | P | 10,000 | $9.78 | $97,800 | 110,000 Direct | +10.00% | Acquired | -9.7% (price as of 2026-10-05) |
| March 9, 2022 | NRDS | P | 13,794 | $11.33 | $156,286 | 100,000 Direct | +16.00% | Acquired | -22.1% (price as of 2026-10-05) |
| March 8, 2022 | NRDS | P | 25,100 | $10.19 | $255,769 | 86,206 Direct | +41.08% | Acquired | -13.3% (price as of 2026-10-05) |
| March 7, 2022 | NRDS | P | 61,106 | $9.80 | $598,839 | 61,106 Direct | · | Acquired | -9.9% (price as of 2026-10-05) |
| Nov. 8, 2021 | NRDS | C | 16,190,811 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-05) |
| Nov. 8, 2021 | NRDS | C | 4,405,720 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-05) |
| Nov. 8, 2021 | NRDS | C | 2,639,121 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-05) |
| Nov. 8, 2021 | NRDS | C | 8,450,000 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-05) |
| Nov. 8, 2021 | NRDS | C | 16,190,811 | · | · | 16,190,811 Indirect | · | Acquired | (price as of 2026-10-05) |
| Nov. 8, 2021 | NRDS | C | 4,405,720 | · | · | 4,405,720 Indirect | · | Acquired | (price as of 2026-10-05) |
| Nov. 8, 2021 | NRDS | C | 2,639,121 | · | · | 2,639,121 Indirect | · | Acquired | (price as of 2026-10-05) |
| Nov. 8, 2021 | NRDS | C | 8,450,000 | · | · | 8,450,000 Indirect | · | Acquired | (price as of 2026-10-05) |
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. 24, 2025 | NRDS | Class B Common Stock | Class A Common Stock | · | · | 3,741,387 | Disposed |
| Nov. 24, 2025 | NRDS | Class B Common Stock | Class A Common Stock | · | · | 2,740,027 | Acquired |
| Nov. 24, 2025 | NRDS | Class B Common Stock | Class B Common Stock | · | · | 1,001,360 | Acquired |
| Dec. 12, 2023 | NRDS | Class B Common Stock | Class A Common Stock | · | · | 4,405,720 | Disposed |
| Dec. 12, 2023 | NRDS | Class B Common Stock | Class A Common Stock | · | · | 1,468,573 | Acquired |
| Dec. 12, 2023 | NRDS | Class B Common Stock | Class A Common Stock | · | · | 1,468,573 | Acquired |
| Dec. 12, 2023 | NRDS | Class B Common Stock | Class A Common Stock | · | · | 1,468,574 | Acquired |
| Dec. 12, 2023 | NRDS | Class B Common Stock | Class A Common Stock | · | · | 1,319,560 | Disposed |
| Dec. 12, 2023 | NRDS | Class B Common Stock | Class A Common Stock | · | · | 1,319,560 | Acquired |
| Dec. 12, 2023 | NRDS | Class B Common Stock | Class A Common Stock | · | · | 1,932,076 | Disposed |
| Dec. 12, 2023 | NRDS | Class B Common Stock | Class A Common Stock | · | · | 966,038 | Acquired |
| Dec. 12, 2023 | NRDS | Class B Common Stock | Class A Common Stock | · | · | 966,038 | Acquired |
| July 1, 2022 | NRDS | Employee Stock Options (right to buy) | Class A Common Stock | $9.17 | July 1, 2027 | 11,990 | Acquired |
| July 1, 2022 | NRDS | Employee Stock Options (right to buy) | Class A Common Stock | $8.34 | July 1, 2032 | 586,778 | Acquired |
| Nov. 8, 2021 | NRDS | Class F Common Stock | Class B Common Stock | · | · | 16,190,811 | Disposed |
| Nov. 8, 2021 | NRDS | Class F Common Stock | Class B Common Stock | · | · | 4,405,720 | Disposed |
| Nov. 8, 2021 | NRDS | Class F Common Stock | Class B Common Stock | · | · | 2,639,121 | Disposed |
| Nov. 8, 2021 | NRDS | Class F Common Stock | Class B Common Stock | · | · | 8,450,000 | Disposed |
| Nov. 8, 2021 | NRDS | Class B Common Stock | Class B Common Stock | · | · | 16,190,811 | Acquired |
| Nov. 8, 2021 | NRDS | Class B Common Stock | Class B Common Stock | · | · | 4,405,720 | Acquired |
| Nov. 8, 2021 | NRDS | Class B Common Stock | Class B Common Stock | · | · | 2,639,121 | Acquired |
| Nov. 8, 2021 | NRDS | Class B Common Stock | Class B Common Stock | · | · | 8,450,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 6 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Nov. 3, 2021 | NRDS | Class F Common Stock | 16,190,811 | Indirect |
| Nov. 3, 2021 | NRDS | Class F Common Stock | 4,405,720 | Indirect |
| Nov. 3, 2021 | NRDS | Class F Common Stock | 2,639,121 | Indirect |
| Nov. 3, 2021 | NRDS | Class F Common Stock | 8,450,000 | Indirect |
| Nov. 3, 2021 | NRDS | Employee Stock Options (right to buy) | 19,840 | Direct |
| Nov. 3, 2021 | NRDS | Employee Stock Options (right to buy) | 455,160 | Direct |
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 |
|---|---|---|---|---|---|---|---|---|
| 2025 | $700,000 | · | · | · | $825,024 | · | $16,100 | $1,541,124 |
| 2024 | $700,000 | · | · | · | $770,800 | · | $16,304 | $1,487,104 |
| 2023 | $687,500 | · | · | · | · | · | $15,300 | $6,546,670 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.