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Thomas C Chen
Insider
First SEC filing: March 28, 2025 · Latest: March 28, 2025
Insider at
Insider transactions
9 buys (P)
0 sells (S)
Net: $443,097
Avg return of open purchases vs now: -29.0%
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. 14, 2026 | NTHI | P | 5,242 | $3.82 | $20,024 | 24,503 Indirect | +27.22% | Acquired | -21.7% (price as of 2026-10-02) |
| Sept. 11, 2026 | NTHI | P | 5,556 | $3.60 | $20,002 | 19,261 Indirect | +40.54% | Acquired | -16.9% (price as of 2026-10-02) |
| Aug. 18, 2026 | NTHI | P | 12,757 | $5.49 | $70,036 | 13,705 Indirect | +1345.68% | Acquired | -45.5% (price as of 2026-10-02) |
| Aug. 17, 2026 | NTHI | P | 2,472 | $4.04 | $9,987 | 583,531 Direct | +0.43% | Acquired | -26.0% (price as of 2026-10-02) |
| Aug. 17, 2026 | NTHI | P | 2,472 | $4.04 | $9,987 | 583,531 Direct | +0.43% | Acquired | -26.0% (price as of 2026-10-02) |
| Aug. 14, 2026 | NTHI | P | 33,787 | $3.85 | $130,080 | 581,059 Direct | +6.17% | Acquired | -22.3% (price as of 2026-10-02) |
| Aug. 14, 2026 | NTHI | P | 33,787 | $3.85 | $130,080 | 581,059 Direct | +6.17% | Acquired | -22.3% (price as of 2026-10-02) |
| April 24, 2026 | NTHI | P | 10,000 | $4.80 | $48,000 | 10,000 Indirect | · | Acquired | -37.7% (price as of 2026-10-02) |
| April 10, 2026 | NTHI | P | 948 | $5.17 | $4,901 | 948 Indirect | · | Acquired | -42.2% (price as of 2026-10-02) |
| May 22, 2025 | NTHI | P | 2,709 | $7.38 | $19,992 | 551,668 Direct | +0.49% | Acquired | -59.5% (price as of 2026-10-02) |
| May 21, 2025 | NTHI | P | 2,759 | $7.25 | $20,003 | 548,959 Direct | +0.51% | Acquired | -58.8% (price as of 2026-10-02) |
| May 12, 2025 | NTHI | P | 400 | $7.00 | $2,800 | 546,200 Direct | +0.07% | Acquired | -57.3% (price as of 2026-10-02) |
| March 26, 2025 | NTHI | S | 38,250 | $25.00 | $956,250 | 262,225 Indirect | -12.73% | Disposed | -88.0% (price as of 2026-10-02) |
| March 26, 2025 | NTHI | X | 79,688 | $12.00 | $956,256 | 300,475 Indirect | +36.09% | Acquired | -75.1% (price as of 2026-10-02) |
| March 26, 2025 | NTHI | J | 4,076 | · | · | 220,787 Indirect | -1.81% | Disposed | (price as of 2026-10-02) |
| March 26, 2025 | NTHI | X | 79,688 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| March 26, 2025 | NTHI | S | 983 | $19.13 | $18,805 | 261,242 Indirect | -0.37% | Disposed | -84.4% (price as of 2026-10-02) |
| March 26, 2025 | NTHI | X | 79,688 | $12.00 | $956,256 | 300,475 Indirect | +36.09% | Acquired | -75.1% (price as of 2026-10-02) |
| March 26, 2025 | NTHI | J | 4,076 | · | · | 220,787 Indirect | -1.81% | Disposed | (price as of 2026-10-02) |
| March 26, 2025 | NTHI | X | 79,688 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| March 26, 2025 | NTHI | S | 983 | $19.13 | $18,805 | 261,242 Indirect | -0.37% | Disposed | -84.4% (price as of 2026-10-02) |
| March 26, 2025 | NTHI | S | 38,250 | $25.00 | $956,250 | 262,225 Indirect | -12.73% | Disposed | -88.0% (price as of 2026-10-02) |
| March 26, 2025 | NTHI | J | 4,076 | · | · | 220,787 Indirect | -1.81% | Disposed | (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 |
|---|---|---|---|---|---|---|---|
| March 26, 2025 | NTHI | Warrant (right to buy) | Common Stock | $12.00 | · | 79,688 | Disposed |
| March 26, 2025 | NTHI | Warrant (right to buy) | Common Stock | $12.00 | · | 79,688 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).