Thomas Caulfield
Insider
First SEC filing: June 4, 2026 · Latest: June 4, 2026
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
No open-market trades on record; showing all filings.
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| July 7, 2026 | USAR | A | 271 | · | · | 3,226 Direct | +9.17% | Acquired | (price as of 2026-10-05) |
| June 3, 2026 | USAR | A | 407 | · | · | 407 Direct | · | Acquired | (price as of 2026-10-05) |
| June 3, 2026 | USAR | M | 2,548 | · | · | 2,955 Direct | +626.04% | Acquired | (price as of 2026-10-05) |
| June 3, 2026 | USAR | M | 2,548 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| June 3, 2026 | USAR | A | 6,438 | · | · | 6,438 Direct | · | Acquired | (price as of 2026-10-05) |
| May 12, 2026 | SNDK | G | 9,666 | · | · | 4,834 Indirect | -66.66% | Disposed | (price as of 2026-10-05) |
| May 1, 2026 | GFS | A | 146,199 | · | · | 188,256 Direct | +347.62% | Acquired | (price as of 2026-10-05) |
| March 19, 2026 | USAR | A | 2,548 | · | · | 2,548 Direct | · | Acquired | (price as of 2026-10-05) |
| March 3, 2026 | SNDK | G | 14,500 | · | · | 2,312 Direct | -86.25% | Disposed | (price as of 2026-10-05) |
| March 3, 2026 | SNDK | G | 14,500 | · | · | 14,500 Indirect | · | Acquired | (price as of 2026-10-05) |
| Nov. 18, 2025 | SNDK | A | 979 | · | · | 16,812 Direct | +6.18% | Acquired | (price as of 2026-10-05) |
| March 3, 2025 | SNDK | A | 4,148 | · | · | 15,833 Direct | +35.50% | Acquired | (price as of 2026-10-05) |
| Feb. 28, 2025 | SNDK | A | 5,693 | · | · | 11,685 Direct | +95.01% | Acquired | (price as of 2026-10-05) |
| Nov. 20, 2024 | WDC | A | 3,759 | · | · | 21,737 Direct | +20.91% | Acquired | (price as of 2026-10-05) |
| Nov. 15, 2023 | WDC | A | 5,213 | · | · | 17,978 Direct | +40.84% | Acquired | (price as of 2026-10-05) |
| Nov. 16, 2022 | WDC | A | 6,589 | · | · | 12,765 Direct | +106.69% | Acquired | (price as of 2026-10-05) |
| Nov. 16, 2021 | WDC | A | 4,103 | · | · | 6,176 Direct | +197.93% | Acquired | (price as of 2026-10-05) |
| July 6, 2021 | WDC | A | 2,073 | · | · | 2,073 Direct | · | Acquired | (price as of 2026-10-05) |
| Sept. 11, 2013 | PDFS | G | 500 | · | · | 30,714 Direct | -1.60% | Disposed | (price as of 2026-10-05) |
| May 28, 2013 | PDFS | A | 7,374 | · | · | 31,214 Direct | +30.93% | Acquired | (price as of 2026-10-05) |
| May 22, 2012 | PDFS | A | 3,750 | $8.79 | $32,962 | 25,715 Direct | +17.07% | Acquired | 538.0% (price as of 2026-10-05) |
| May 22, 2012 | PDFS | A | 11,250 | · | · | 11,250 Direct | · | Acquired | (price as of 2026-10-05) |
| May 27, 2011 | PDFS | A | 3,750 | · | · | 21,965 Direct | +20.59% | Acquired | (price as of 2026-10-05) |
| May 27, 2011 | PDFS | A | 11,250 | · | · | 11,250 Direct | · | Acquired | (price as of 2026-10-05) |
| May 18, 2010 | PDFS | A | 22,500 | · | · | 22,500 Direct | · | Acquired | (price as of 2026-10-05) |
| Dec. 16, 2009 | PDFS | D | 15,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Dec. 16, 2009 | PDFS | A | 7,500 | · | · | 18,215 Direct | +70.00% | Acquired | (price as of 2026-10-05) |
| July 31, 2009 | PDFS | A | 20,000 | · | · | 20,000 Direct | · | Acquired | (price as of 2026-10-05) |
| Aug. 19, 2008 | PDFS | A | 3,572 | · | · | 3,572 Direct | · | Acquired | (price as of 2026-10-05) |
| Aug. 19, 2008 | PDFS | A | 7,143 | · | · | 7,143 Direct | · | Acquired | (price as of 2026-10-05) |
| Aug. 19, 2008 | PDFS | D | 15,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Aug. 19, 2008 | PDFS | D | 30,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Aug. 18, 2008 | PDFS | A | 3,572 | · | · | 3,572 Direct | · | Acquired | (price as of 2026-10-05) |
| Aug. 18, 2008 | PDFS | A | 7,143 | · | · | 7,143 Direct | · | Acquired | (price as of 2026-10-05) |
| Aug. 18, 2008 | PDFS | D | 15,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Aug. 18, 2008 | PDFS | D | 30,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| May 22, 2008 | PDFS | A | 15,000 | · | · | 15,000 Direct | · | Acquired | (price as of 2026-10-05) |
| May 30, 2007 | PDFS | A | 15,000 | · | · | 15,000 Direct | · | Acquired | (price as of 2026-10-05) |
| Sept. 15, 2006 | PDFS | A | 30,000 | · | · | 30,000 Direct | · | 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 |
|---|---|---|---|---|---|---|---|
| June 3, 2026 | USAR | Restricted Stock Units | Common Stock, par value $0.0001 per share | · | · | 2,548 | Disposed |
| June 3, 2026 | USAR | Restricted Stock Units | Common Stock, par value $0.0001 per share | · | · | 6,438 | Acquired |
| March 19, 2026 | USAR | Restricted Stock Units | Common Stock, par value $0.0001 per share | · | · | 2,548 | Acquired |
| May 22, 2012 | PDFS | Stock Options (Right to Buy) | Common Stock | $8.79 | May 21, 2022 | 11,250 | Acquired |
| May 27, 2011 | PDFS | 2001 Stock Plan Option (right to buy) | Common Stock | $6.21 | May 27, 2021 | 11,250 | Acquired |
| May 18, 2010 | PDFS | 2001 Stock Plan Option (right to buy) | Common Stock | $4.82 | May 18, 2020 | 22,500 | Acquired |
| Dec. 16, 2009 | PDFS | 2001 Stock Plan Option (Right to Buy) | Common Stock | $5.40 | May 21, 2018 | 15,000 | Disposed |
| July 31, 2009 | PDFS | 2001 Stock Plan Option (right to buy) | Common Stock | $2.30 | July 30, 2019 | 20,000 | Acquired |
| Aug. 19, 2008 | PDFS | Restricted Stock Right | Common Stock | · | · | 3,572 | Acquired |
| Aug. 19, 2008 | PDFS | Restricted Stock Right | Common Stock | · | · | 7,143 | Acquired |
| Aug. 19, 2008 | PDFS | 2001 Stock Plan Option (right to buy) | Common Stock | $10.43 | May 29, 2017 | 15,000 | Disposed |
| Aug. 19, 2008 | PDFS | 2001 Stock Plan Option (right to buy) | Common Stock | $12.98 | Aug. 29, 2016 | 30,000 | Disposed |
| Aug. 18, 2008 | PDFS | Restricted Stock Right | Common Stock | · | · | 3,572 | Acquired |
| Aug. 18, 2008 | PDFS | Restricted Stock Right | Common Stock | · | · | 7,143 | Acquired |
| Aug. 18, 2008 | PDFS | 2001 Stock Plan Option (right to buy) | Common Stock | $10.43 | May 29, 2017 | 15,000 | Disposed |
| Aug. 18, 2008 | PDFS | 2001 Stock Plan Option (right to buy) | Common Stock | $12.98 | Aug. 29, 2016 | 30,000 | Disposed |
| May 22, 2008 | PDFS | 2001 Stock Plan Option (right to buy) | Common Stock | $5.40 | May 21, 2018 | 15,000 | Acquired |
| May 30, 2007 | PDFS | 2001 Stock Plan Option (right to buy) | Common Stock | $10.43 | May 29, 2017 | 15,000 | Acquired |
| Sept. 15, 2006 | PDFS | 2001 Stock Plan Option (right to buy) | Common Stock | $12.98 | Sept. 14, 2016 | 30,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 3 holdings
Securities held when first becoming an insider, per SEC Form 3.