Floyd F. Petersen
CIK 1611286 · View on SEC EDGAR ↗
Insider
First SEC filing: June 24, 2014 · Latest: June 24, 2014
On this page
Insider at
Insider transactions
0 buys (P)
1 sells (S)
Net:
$-15,490
+ 31 non-open-market transactions below
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
31 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Sept. 2, 2025 | AMPH | S 10b5-1 | 500 | $30.98 | $15,490 | 76,531 Direct | -0.65% | Disposed | -30.3% (price as of 2026-08-21) |
| Aug. 1, 2025 | AMPH | S 10b5-1 | 500 | $20.83 | $10,415 | 77,031 Direct | -0.64% | Disposed | 3.7% (price as of 2026-08-21) |
| July 2, 2025 | AMPH | S 10b5-1 | 500 | $23.47 | $11,735 | 77,531 Direct | -0.64% | Disposed | -8.0% (price as of 2026-08-21) |
| June 2, 2025 | AMPH | S 10b5-1 | 500 | $25.67 | $12,835 | 72,909 Direct | -0.68% | Disposed | -15.9% (price as of 2026-08-21) |
| May 1, 2025 | AMPH | S 10b5-1 | 500 | $24.08 | $12,040 | 73,409 Direct | -0.68% | Disposed | -10.3% (price as of 2026-08-21) |
| April 1, 2025 | AMPH | S 10b5-1 | 500 | $28.38 | $14,190 | 73,909 Direct | -0.67% | Disposed | -23.9% (price as of 2026-08-21) |
| March 6, 2025 | AMPH | S 10b5-1 | 1,000 | $27.99 | $27,990 | 74,409 Direct | -1.33% | Disposed | -22.8% (price as of 2026-08-21) |
| Sept. 5, 2024 | AMPH | S | 3,000 | $46.47 | $139,410 | 75,409 Direct | -3.83% | Disposed | -53.5% (price as of 2026-08-21) |
| June 10, 2024 | AMPH | S | 3,000 | $41.40 | $124,200 | 78,409 Direct | -3.69% | Disposed | -47.8% (price as of 2026-08-21) |
| June 3, 2024 | AMPH | S 10b5-1 | 500 | $42.65 | $21,325 | 78,333 Direct | -0.63% | Disposed | -49.4% (price as of 2026-08-21) |
| May 1, 2024 | AMPH | S 10b5-1 | 500 | $41.67 | $20,835 | 78,833 Direct | -0.63% | Disposed | -48.2% (price as of 2026-08-21) |
| April 1, 2024 | AMPH | S 10b5-1 | 500 | $43.43 | $21,715 | 79,333 Direct | -0.63% | Disposed | -50.3% (price as of 2026-08-21) |
| March 1, 2024 | AMPH | S 10b5-1 | 451 | $45.60 | $20,566 | 79,882 Direct | -0.56% | Disposed | -52.6% (price as of 2026-08-21) |
| March 1, 2024 | AMPH | S 10b5-1 | 49 | $46.53 | $2,280 | 79,833 Direct | -0.06% | Disposed | -53.6% (price as of 2026-08-21) |
| Feb. 1, 2024 | AMPH | S 10b5-1 | 26 | $53.64 | $1,395 | 80,333 Direct | -0.03% | Disposed | -59.7% (price as of 2026-08-21) |
| Feb. 1, 2024 | AMPH | S 10b5-1 | 474 | $53.07 | $25,155 | 80,359 Direct | -0.59% | Disposed | -59.3% (price as of 2026-08-21) |
| Jan. 2, 2024 | AMPH | S 10b5-1 | 353 | $61.70 | $21,780 | 80,833 Direct | -0.43% | Disposed | -65.0% (price as of 2026-08-21) |
| Jan. 2, 2024 | AMPH | S 10b5-1 | 147 | $60.56 | $8,902 | 81,186 Direct | -0.18% | Disposed | -64.3% (price as of 2026-08-21) |
| Dec. 1, 2023 | AMPH | S 10b5-1 | 365 | $58.15 | $21,225 | 81,333 Direct | -0.45% | Disposed | -62.9% (price as of 2026-08-21) |
| Dec. 1, 2023 | AMPH | S 10b5-1 | 135 | $57.24 | $7,727 | 81,698 Direct | -0.16% | Disposed | -62.3% (price as of 2026-08-21) |
| Nov. 1, 2023 | AMPH | S 10b5-1 | 500 | $45.30 | $22,650 | 81,833 Direct | -0.61% | Disposed | -52.3% (price as of 2026-08-21) |
| Oct. 2, 2023 | AMPH | S 10b5-1 | 500 | $45.78 | $22,890 | 82,333 Direct | -0.60% | Disposed | -52.8% (price as of 2026-08-21) |
| May 17, 2023 | AMPH | S | 5,000 | $43.13 | $215,650 | 80,117 Direct | -5.87% | Disposed | -49.9% (price as of 2026-08-21) |
| April 3, 2023 | AMPH | S 10b5-1 | 491 | $37.72 | $18,521 | 85,117 Direct | -0.57% | Disposed | -42.7% (price as of 2026-08-21) |
| March 1, 2023 | AMPH | S 10b5-1 | 87 | $37.25 | $3,241 | 85,608 Direct | -0.10% | Disposed | -42.0% (price as of 2026-08-21) |
| March 1, 2023 | AMPH | S 10b5-1 | 412 | $36.59 | $15,075 | 85,695 Direct | -0.48% | Disposed | -41.0% (price as of 2026-08-21) |
| March 1, 2023 | AMPH | S 10b5-1 | 1 | $33.70 | $34 | 86,107 Direct | 0.00% | Disposed | -35.9% (price as of 2026-08-21) |
| Feb. 1, 2023 | AMPH | S 10b5-1 | 500 | $30.35 | $15,175 | 86,108 Direct | -0.58% | Disposed | -28.8% (price as of 2026-08-21) |
| Jan. 3, 2023 | AMPH | S 10b5-1 | 500 | $27.94 | $13,970 | 86,608 Direct | -0.57% | Disposed | -22.7% (price as of 2026-08-21) |
| Dec. 1, 2022 | AMPH | S 10b5-1 | 500 | $30.13 | $15,065 | 87,108 Direct | -0.57% | Disposed | -28.3% (price as of 2026-08-21) |
| Nov. 1, 2022 | AMPH | S 10b5-1 | 500 | $31.13 | $15,565 | 87,608 Direct | -0.57% | Disposed | -30.6% (price as of 2026-08-21) |
| Oct. 3, 2022 | AMPH | S 10b5-1 | 500 | $28.59 | $14,295 | 88,108 Direct | -0.56% | Disposed | -24.4% (price as of 2026-08-21) |
| Sept. 1, 2022 | AMPH | S 10b5-1 | 500 | $29.44 | $14,720 | 88,608 Direct | -0.56% | Disposed | -26.6% (price as of 2026-08-21) |
| Aug. 1, 2022 | AMPH | S 10b5-1 | 500 | $37.48 | $18,740 | 89,108 Direct | -0.56% | Disposed | -42.4% (price as of 2026-08-21) |
| July 1, 2022 | AMPH | S 10b5-1 | 500 | $34.78 | $17,390 | 89,608 Direct | -0.55% | Disposed | -37.9% (price as of 2026-08-21) |
| June 1, 2022 | AMPH | S 10b5-1 | 120 | $37.67 | $4,520 | 85,945 Direct | -0.14% | Disposed | -42.7% (price as of 2026-08-21) |
| June 1, 2022 | AMPH | S 10b5-1 | 380 | $36.79 | $13,980 | 86,065 Direct | -0.44% | Disposed | -41.3% (price as of 2026-08-21) |
| May 18, 2022 | AMPH | S | 9,924 | $35.05 | $347,836 | 86,445 Direct | -10.30% | Disposed | -38.4% (price as of 2026-08-21) |
| May 2, 2022 | AMPH | S 10b5-1 | 27 | $35.52 | $959 | 76,078 Direct | -0.04% | Disposed | -39.2% (price as of 2026-08-21) |
| May 2, 2022 | AMPH | S 10b5-1 | 268 | $35.15 | $9,420 | 76,105 Direct | -0.35% | Disposed | -38.5% (price as of 2026-08-21) |
| April 1, 2022 | AMPH | S 10b5-1 | 63 | $37.35 | $2,353 | 76,373 Direct | -0.08% | Disposed | -42.2% (price as of 2026-08-21) |
| April 1, 2022 | AMPH | S 10b5-1 | 437 | $36.59 | $15,990 | 76,436 Direct | -0.57% | Disposed | -41.0% (price as of 2026-08-21) |
| March 1, 2022 | AMPH | S 10b5-1 | 500 | $27.27 | $13,635 | 76,873 Direct | -0.65% | Disposed | -20.8% (price as of 2026-08-21) |
| Feb. 1, 2022 | AMPH | S 10b5-1 | 411 | $24.24 | $9,963 | 77,373 Direct | -0.53% | Disposed | -10.9% (price as of 2026-08-21) |
| Feb. 1, 2022 | AMPH | S 10b5-1 | 89 | $23.37 | $2,080 | 77,784 Direct | -0.11% | Disposed | -7.6% (price as of 2026-08-21) |
| Jan. 3, 2022 | AMPH | S 10b5-1 | 500 | $23.22 | $11,610 | 77,873 Direct | -0.64% | Disposed | -7.0% (price as of 2026-08-21) |
| Dec. 22, 2021 | AMPH | S 10b5-1 | 1,000 | $22.50 | $22,500 | 78,373 Direct | -1.26% | Disposed | -4.0% (price as of 2026-08-21) |
| June 7, 2021 | AMPH | S | 15,827 | $19.34 | $306,094 | 73,354 Direct | -17.75% | Disposed | 11.7% (price as of 2026-08-21) |
| June 3, 2021 | AMPH | S | 10,000 | $18.65 | $186,500 | 73,354 Direct | -12.00% | Disposed | 15.8% (price as of 2026-08-21) |
| Feb. 1, 2021 | AMPH | S 10b5-1 | 639 | $18.26 | $11,668 | 73,354 Direct | -0.86% | Disposed | 18.3% (price as of 2026-08-21) |
| Dec. 1, 2020 | AMPH | S 10b5-1 | 500 | $17.87 | $8,935 | 73,993 Direct | -0.67% | Disposed | 20.9% (price as of 2026-08-21) |
| Nov. 2, 2020 | AMPH | S 10b5-1 | 500 | $19.84 | $9,920 | 74,493 Direct | -0.67% | Disposed | 8.9% (price as of 2026-08-21) |
| Oct. 1, 2020 | AMPH | S 10b5-1 | 500 | $18.89 | $9,445 | 74,993 Direct | -0.66% | Disposed | 14.3% (price as of 2026-08-21) |
| Sept. 1, 2020 | AMPH | S 10b5-1 | 500 | $19.90 | $9,950 | 75,493 Direct | -0.66% | Disposed | 8.5% (price as of 2026-08-21) |
| Aug. 3, 2020 | AMPH | S 10b5-1 | 500 | $20.62 | $10,310 | 75,993 Direct | -0.65% | Disposed | 4.8% (price as of 2026-08-21) |
| July 1, 2020 | AMPH | S 10b5-1 | 500 | $22.27 | $11,135 | 76,493 Direct | -0.65% | Disposed | -3.0% (price as of 2026-08-21) |
| June 1, 2020 | AMPH | S 10b5-1 | 500 | $18.97 | $9,485 | 71,142 Direct | -0.70% | Disposed | 13.9% (price as of 2026-08-21) |
| May 15, 2020 | AMPH | S | 42,682 | $18.25 | $778,946 | 71,642 Direct | -37.33% | Disposed | 18.4% (price as of 2026-08-21) |
| May 14, 2020 | AMPH | S | 5,000 | $17.78 | $88,900 | 71,642 Direct | -6.52% | Disposed | 21.5% (price as of 2026-08-21) |
| May 12, 2020 | AMPH | S | 100 | $19.20 | $1,920 | 71,642 Direct | -0.14% | Disposed | 12.5% (price as of 2026-08-21) |
| May 1, 2020 | AMPH | S 10b5-1 | 500 | $16.66 | $8,330 | 71,642 Direct | -0.69% | Disposed | 29.7% (price as of 2026-08-21) |
| April 1, 2020 | AMPH | S 10b5-1 | 500 | $14.36 | $7,180 | 72,142 Direct | -0.69% | Disposed | 50.4% (price as of 2026-08-21) |
| March 2, 2020 | AMPH | S 10b5-1 | 500 | $15.56 | $7,780 | 72,642 Direct | -0.68% | Disposed | 38.8% (price as of 2026-08-21) |
| Feb. 3, 2020 | AMPH | S 10b5-1 | 500 | $19.12 | $9,560 | 73,142 Direct | -0.68% | Disposed | 13.0% (price as of 2026-08-21) |
| Jan. 2, 2020 | AMPH | S 10b5-1 | 1,000 | $19.14 | $19,140 | 73,642 Direct | -1.34% | Disposed | 12.9% (price as of 2026-08-21) |
| Dec. 2, 2019 | AMPH | S 10b5-1 | 500 | $19.25 | $9,625 | 74,642 Direct | -0.67% | Disposed | 12.2% (price as of 2026-08-21) |
| Nov. 1, 2019 | AMPH | S 10b5-1 | 500 | $19.48 | $9,740 | 75,142 Direct | -0.66% | Disposed | 10.9% (price as of 2026-08-21) |
| Oct. 1, 2019 | AMPH | S 10b5-1 | 500 | $19.92 | $9,960 | 75,642 Direct | -0.66% | Disposed | 8.4% (price as of 2026-08-21) |
| Sept. 16, 2019 | AMPH | S 10b5-1 | 500 | $21.75 | $10,875 | 76,142 Direct | -0.65% | Disposed | -0.7% (price as of 2026-08-21) |
Showing latest 100 of 118 transactions
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 2, 2025 | AMPH | Stock Option (right to buy) | Common Stock (11,402) | $25.38 | June 2, 2035 | 11,402 | Acquired |
| June 3, 2024 | AMPH | Stock Option (right to buy) | Common Stock (6,864) | $42.25 | June 3, 2034 | 6,864 | Acquired |
| June 5, 2023 | AMPH | Stock Option (right to buy) | Common Stock (7,016) | $46.01 | June 5, 2031 | 7,016 | Acquired |
| June 10, 2022 | AMPH | Stock Option (right to buy) | Common Stock (10,984) | $30.02 | June 10, 2030 | 10,984 | Acquired |
| May 18, 2022 | AMPH | Stock Option (right to buy) | Common Stock (20,291) | $17.11 | June 8, 2022 | 20,291 | Disposed |
| June 7, 2021 | AMPH | Stock Option (right to buy) | Common Stock (17,182) | $19.52 | June 7, 2029 | 17,182 | Acquired |
| June 7, 2021 | AMPH | Stock Option (right to buy) | Common Stock (15,827) | $16.43 | June 9, 2021 | 15,827 | Disposed |
| June 3, 2021 | AMPH | Stock option (right to buy) | Common Stock (10,000) | $16.43 | June 9, 2021 | 10,000 | Disposed |
| June 8, 2020 | AMPH | Stock Option (right to buy) | Common Stock (16,004) | $20.08 | June 8, 2028 | 16,004 | Acquired |
| May 15, 2020 | AMPH | Stock Option (right to buy) | Common Stock (42,682) | $15.11 | May 27, 2020 | 42,682 | Disposed |
| May 14, 2020 | AMPH | Stock Option (right to buy) | Common Stock (5,000) | $15.11 | May 27, 2020 | 5,000 | Disposed |
| May 12, 2020 | AMPH | Stock Option (right to buy) | Common Stock (100) | $15.11 | May 27, 2020 | 100 | Disposed |
| June 12, 2019 | AMPH | Stock Option (right to buy) | Common Stock (13,915) | $20.03 | June 12, 2027 | 13,915 | Acquired |
| Dec. 12, 2018 | AMPH | Stock Option (right to buy) | Common Stock (29,278) | $14.66 | Dec. 12, 2018 | 29,278 | Disposed |
| June 7, 2018 | AMPH | Stock Option (right to buy) | Common Stock (16,679) | $16.69 | June 7, 2026 | 16,679 | Acquired |
| Oct. 4, 2017 | AMPH | Stock Option (right to buy) | Common Stock (39,312) | $10.77 | Dec. 15, 2017 | 39,312 | Disposed |
| June 8, 2017 | AMPH | Stock Option (right to buy) | Common Stock (20,291) | $17.11 | June 8, 2022 | 20,291 | Acquired |
| June 9, 2016 | AMPH | Stock Option (right to buy) | Common Stock (25,827) | $16.43 | June 9, 2021 | 25,827 | Acquired |
| Nov. 20, 2015 | AMPH | Stock Option (right to buy) | Common Stock (38,462) | $11.68 | Dec. 18, 2015 | 38,462 | Disposed |
| May 27, 2015 | AMPH | Stock Option (right to buy) | Common Stock (47,782) | $15.11 | May 27, 2020 | 47,782 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 5 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| June 24, 2014 | AMPH | Common Stock | 32,955 | Direct |
| June 24, 2014 | AMPH | Common Stock | — | Direct |
| June 24, 2014 | AMPH | Stock Option (Right to Buy)→ Common Stock (38,462) | 38,462 | Direct |
| June 24, 2014 | AMPH | Stock Option (Right to Buy)→ Common Stock (39,312) | 39,312 | Direct |
| June 24, 2014 | AMPH | Stock Option (Right to Buy)→ Common Stock (29,278) | 29,278 | Direct |