Gregg R. Honigblum
CIK 1408053 · View on SEC EDGAR ↗
Insider
First SEC filing: Feb. 10, 2026 · Latest: Feb. 10, 2026
On this page
Insider transactions
27 buys (P)
0 sells (S)
Net:
$507,146
+ 2 non-open-market transactions below
Avg return of open purchases vs now:
-60.0%
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
2 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Dec. 8, 2025 | SINT | P | 3,200 | $4.28 | $13,696 | 196,067 Direct | +1.66% | Acquired | -64.5% (price as of 2026-08-24) |
| Dec. 8, 2025 | SINT | P | 5,000 | $4.24 | $21,200 | 201,067 Direct | +2.55% | Acquired | -64.2% (price as of 2026-08-24) |
| Dec. 5, 2025 | SINT | P | 5,000 | $3.95 | $19,750 | 79,000 Direct | +6.76% | Acquired | -61.5% (price as of 2026-08-24) |
| Dec. 5, 2025 | SINT | P | 5,000 | $3.94 | $19,700 | 84,000 Direct | +6.33% | Acquired | -61.4% (price as of 2026-08-24) |
| Dec. 5, 2025 | SINT | P | 5,000 | $4.00 | $20,000 | 89,000 Direct | +5.95% | Acquired | -62.0% (price as of 2026-08-24) |
| Dec. 5, 2025 | SINT | P | 5,000 | $4.07 | $20,350 | 94,000 Direct | +5.62% | Acquired | -62.7% (price as of 2026-08-24) |
| Dec. 5, 2025 | SINT | P | 5,000 | $4.02 | $20,100 | 99,000 Direct | +5.32% | Acquired | -62.2% (price as of 2026-08-24) |
| Dec. 5, 2025 | SINT | P | 5,000 | $3.94 | $19,700 | 104,000 Direct | +5.05% | Acquired | -61.4% (price as of 2026-08-24) |
| Dec. 5, 2025 | SINT | P | 5,000 | $3.91 | $19,550 | 109,000 Direct | +4.81% | Acquired | -61.1% (price as of 2026-08-24) |
| Dec. 5, 2025 | SINT | P | 5,000 | $3.91 | $19,550 | 114,000 Direct | +4.59% | Acquired | -61.1% (price as of 2026-08-24) |
| Dec. 5, 2025 | SINT | P | 5,000 | $3.91 | $19,550 | 119,000 Direct | +4.39% | Acquired | -61.1% (price as of 2026-08-24) |
| Dec. 5, 2025 | SINT | P | 5,000 | $3.88 | $19,400 | 124,000 Direct | +4.20% | Acquired | -60.8% (price as of 2026-08-24) |
| Dec. 5, 2025 | SINT | P | 5,000 | $3.86 | $19,300 | 129,000 Direct | +4.03% | Acquired | -60.6% (price as of 2026-08-24) |
| Dec. 5, 2025 | SINT | P | 5,000 | $3.91 | $19,550 | 134,000 Direct | +3.88% | Acquired | -61.1% (price as of 2026-08-24) |
| Dec. 5, 2025 | SINT | P | 5,000 | $3.77 | $18,850 | 139,000 Direct | +3.73% | Acquired | -59.7% (price as of 2026-08-24) |
| Nov. 7, 2025 | SINT | P | 5,000 | $3.20 | $16,000 | 69,000 Direct | +7.81% | Acquired | -52.5% (price as of 2026-08-24) |
| Nov. 7, 2025 | SINT | P | 5,000 | $3.18 | $15,900 | 74,000 Direct | +7.25% | Acquired | -52.2% (price as of 2026-08-24) |
| Aug. 26, 2025 | SINT | P | 5,000 | $3.60 | $18,000 | 19,000 Direct | +35.71% | Acquired | -57.8% (price as of 2026-08-24) |
| Aug. 26, 2025 | SINT | P | 5,000 | $3.66 | $18,300 | 24,000 Direct | +26.32% | Acquired | -58.5% (price as of 2026-08-24) |
| Aug. 26, 2025 | SINT | P | 5,000 | $3.70 | $18,500 | 29,000 Direct | +20.83% | Acquired | -58.9% (price as of 2026-08-24) |
| Aug. 26, 2025 | SINT | P | 5,000 | $3.68 | $18,400 | 34,000 Direct | +17.24% | Acquired | -58.7% (price as of 2026-08-24) |
| Aug. 26, 2025 | SINT | P | 5,000 | $3.74 | $18,700 | 39,000 Direct | +14.71% | Acquired | -59.4% (price as of 2026-08-24) |
| Aug. 26, 2025 | SINT | P | 5,000 | $3.73 | $18,650 | 44,000 Direct | +12.82% | Acquired | -59.2% (price as of 2026-08-24) |
| Aug. 26, 2025 | SINT | P | 5,000 | $3.69 | $18,450 | 49,000 Direct | +11.36% | Acquired | -58.8% (price as of 2026-08-24) |
| Aug. 26, 2025 | SINT | P | 5,000 | $3.72 | $18,600 | 54,000 Direct | +10.20% | Acquired | -59.1% (price as of 2026-08-24) |
| Aug. 26, 2025 | SINT | P | 5,000 | $3.75 | $18,750 | 59,000 Direct | +9.26% | Acquired | -59.5% (price as of 2026-08-24) |
| Aug. 26, 2025 | SINT | P | 5,000 | $3.73 | $18,650 | 64,000 Direct | +8.47% | Acquired | -59.2% (price as of 2026-08-24) |
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. 6, 2026 | SINT | Restricted Stock Units | Common Stock (75,000) | — | — | 75,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).