Insider at

04

Insider transactions

05
0 buys (P) 0 sells (S) Net: $0 + 7 non-open-market transactions below 12 months to the week close of 2026-10-23

Price change vs the latest weekly close (updated to the current quote in your browser when available), split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

No open-market trades on record; showing all filings.

DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
Jan. 4, 2016 SINT A 50,000 · · 220,000 Direct +29.41% Acquired
March 9, 2015 SINT A 67,491 · · 67,491 Direct · Acquired
March 9, 2015 SINT F 40,755 $0.58 $23,638 67,491 Direct -37.65% Disposed -100.0% (price as of )
Jan. 8, 2015 SINT D 100,000 · · 70,000 Direct -58.82% Disposed
Jan. 8, 2015 SINT A 100,000 · · 170,000 Direct +142.86% Acquired
Jan. 7, 2015 SINT A 70,000 · · 170,000 Direct +70.00% Acquired
Aug. 13, 2014 SINT A 100,000 · · 100,000 Direct · Acquired

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.

06
DateTickerSecurityUnderlying Exercise priceExpirationSharesA/D
Jan. 4, 2016 SINT Stock Option Common Stock (50,000) $0.11 Jan. 4, 2026 50,000 Acquired
Jan. 8, 2015 SINT Stock Options Common Stock (100,000) $2.95 Aug. 13, 2024 100,000 Disposed
Jan. 8, 2015 SINT Stock Options Common Stock (100,000) $0.95 Aug. 13, 2024 100,000 Acquired
Jan. 7, 2015 SINT Stock Option Common Stock (70,000) $0.97 Jan. 7, 2025 70,000 Acquired
Aug. 13, 2014 SINT Stock Options Common Stock (100,000) $2.95 Aug. 13, 2024 100,000 Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 2 holdings

07

Securities held when first becoming an insider, per SEC Form 3.

DateTickerSecuritySharesOwnership
Feb. 12, 2014 SINT Common Stock 17,071 Direct
Feb. 12, 2014 SINT Stock Options (right to buy)→ Common Stock · Direct