T J Chung
CIK 1217168 · View on SEC EDGAR ↗
Insider
First SEC filing: June 8, 2026 · Latest: June 8, 2026
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 88 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
88 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Aug. 11, 2025 | LFUS | S | 1,664 | $246.46 | $410,109 | 18,730 Direct | -8.16% | Disposed | 68.8% (price as of 2026-08-21) |
| Aug. 11, 2025 | LFUS | S | 679 | $245.24 | $166,518 | 20,394 Direct | -3.22% | Disposed | 69.7% (price as of 2026-08-21) |
| Aug. 18, 2023 | AIRG | P | 5,000 | $4.25 | $21,250 | 23,429 Direct | +27.13% | Acquired | 25.6% (price as of 2026-08-21) |
| May 8, 2023 | LFUS | S | 200 | $259.70 | $51,940 | 16,991 Direct | -1.16% | Disposed | 60.2% (price as of 2026-08-21) |
| May 8, 2023 | LFUS | S | 1,550 | $259.16 | $401,698 | 17,191 Direct | -8.27% | Disposed | 60.5% (price as of 2026-08-21) |
| Feb. 16, 2018 | LFUS | S | 823 | $208.45 | $171,554 | 17,654 Direct | -4.45% | Disposed | 99.6% (price as of 2026-08-21) |
| Feb. 16, 2018 | LFUS | S | 435 | $208.31 | $90,615 | 18,477 Direct | -2.30% | Disposed | 99.7% (price as of 2026-08-21) |
| Feb. 16, 2018 | LFUS | S | 3,596 | $207.54 | $746,314 | 18,912 Direct | -15.98% | Disposed | 100.5% (price as of 2026-08-21) |
| Feb. 9, 2017 | LFUS | S | 549 | $164.32 | $90,212 | 19,448 Direct | -2.75% | Disposed | 153.2% (price as of 2026-08-21) |
| Feb. 9, 2017 | LFUS | S | 1,543 | $164.41 | $253,685 | 17,905 Direct | -7.93% | Disposed | 153.1% (price as of 2026-08-21) |
| Nov. 25, 2016 | LFUS | S | 2,862 | $150.00 | $429,300 | 19,431 Direct | -12.84% | Disposed | 177.4% (price as of 2026-08-21) |
| Feb. 8, 2016 | LFUS | S | 1,724 | $107.06 | $184,571 | 18,708 Direct | -8.44% | Disposed | 288.6% (price as of 2026-08-21) |
Showing latest 100 of 191 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 |
|---|---|---|---|---|---|---|---|
| Aug. 11, 2025 | LFUS | Stock Option (right to buy) | Common Stock (1,432) | $132.08 | April 23, 2027 | 1,432 | Disposed |
| Aug. 11, 2025 | LFUS | Stock Option (right to buy) | Common Stock (911) | $199.24 | April 26, 2026 | 911 | Disposed |
| Feb. 1, 2025 | AIRG | Stock Option (Right to Buy) | Common Stock (7,706) | $6.87 | Jan. 31, 2035 | 7,706 | Acquired |
| April 25, 2024 | LFUS | Stock Option (right to buy) | Common Stock (768) | $230.39 | April 25, 2031 | 768 | Acquired |
| Feb. 1, 2024 | AIRG | Stock Option (Right to Buy) | Common Stock (15,318) | $4.45 | Jan. 31, 2034 | 15,318 | Acquired |
| April 27, 2023 | LFUS | Stock Option (right to buy) | Common Stock (718) | $240.76 | April 27, 2030 | 718 | Acquired |
| Feb. 1, 2023 | AIRG | Stock Option (Right to Buy) | Common Stock (7,584) | $8.00 | Jan. 31, 2033 | 7,584 | Acquired |
| Feb. 1, 2023 | AIRG | Stock Option (Right to Buy) | Common Stock (6,602) | $8.00 | Jan. 31, 2033 | 6,602 | Acquired |
| Feb. 1, 2023 | AIRG | Stock Option (Right to Buy) | Common Stock (6,247) | $8.00 | Jan. 31, 2033 | 6,247 | Acquired |
| Feb. 1, 2022 | AIRG | Stock Option (Right to Buy) | Common Stock (5,576) | $9.46 | Jan. 31, 2032 | 5,576 | Acquired |
| Feb. 1, 2021 | AIRG | Stock Option (Right to Buy) | Common Stock (3,039) | $23.91 | Jan. 31, 2031 | 3,039 | Acquired |
| Feb. 3, 2020 | AIRG | Stock Option (Right to Buy) | Common Stock (7,788) | $9.35 | Feb. 2, 2030 | 7,788 | Acquired |
| Feb. 1, 2019 | AIRG | Stock Option (Right to Buy) | Common Stock (7,397) | $10.75 | Jan. 31, 2029 | 7,397 | Acquired |
| Nov. 5, 2018 | AIRG | Stock Option (Right to Buy) | Common Stock (10,334) | $13.67 | Nov. 4, 2028 | 10,334 | Acquired |
| April 27, 2018 | LFUS | Stock Option (right to buy) | Common Stock (800) | $192.59 | April 27, 2025 | 800 | Acquired |
| Feb. 16, 2018 | LFUS | Stock Option (right to buy) | Common Stock (965) | $96.15 | April 24, 2022 | 965 | Disposed |
| Feb. 16, 2018 | LFUS | Stock Option (right to buy) | Common Stock (1,350) | $94.84 | April 25, 2021 | 1,350 | Disposed |
| Feb. 16, 2018 | LFUS | Stock Option (right to buy) | Common Stock (1,716) | $66.68 | April 26, 2020 | 1,716 | Disposed |
| April 28, 2017 | LFUS | Stock Option (right to buy) | Common Stock (945) | $154.15 | April 28, 2024 | 945 | Acquired |
| Feb. 9, 2017 | LFUS | Stock option (right to buy) | Common Stock (549) | $63.09 | April 27, 2019 | 549 | Disposed |
| Nov. 25, 2016 | LFUS | Stock option (right to buy) | Common stock (1,099) | $63.09 | April 27, 2019 | 1,099 | Disposed |
| Nov. 25, 2016 | LFUS | Stock option (right to buy) | Common stock (1,763) | $62.21 | April 29, 2018 | 1,763 | Disposed |
| April 22, 2016 | LFUS | Stock option (right to buy) | Common stock (1,200) | $120.15 | April 22, 2023 | 1,200 | Acquired |
| Feb. 8, 2016 | LFUS | Stock option (right to buy) | Common stock (1,724) | $42.13 | April 30, 2017 | 1,724 | Disposed |
| April 24, 2015 | LFUS | Stock option (right to buy) | Common stock (1,447) | $96.15 | April 25, 2022 | 1,447 | Acquired |
| April 25, 2014 | LFUS | Stock option (right to buy) | Common stock (1,350) | $94.84 | April 25, 2021 | 1,350 | Acquired |
| April 26, 2013 | LFUS | Stock option (right to buy) | Common stock (1,716) | $66.68 | April 26, 2020 | 1,716 | Acquired |
| Feb. 14, 2013 | LFUS | Common Stock | Common Stock (4,213) | $13.88 | April 24, 2016 | 4,213 | Disposed |
| Feb. 14, 2013 | LFUS | Common Stock | Common Stock (2,415) | $36.33 | April 25, 2015 | 2,415 | Disposed |
| April 27, 2012 | LFUS | Stock Option (Right to Buy) | Common Stock (1,648) | $63.09 | April 27, 2019 | 1,648 | Acquired |
| April 29, 2011 | LFUS | Stock Option (Right to Buy) | Common Stock (1,763) | $62.21 | April 29, 2018 | 1,763 | Acquired |
| April 30, 2010 | LFUS | Stock Option (Right to Buy) | Common Stock (1,724) | $42.13 | April 30, 2017 | 1,724 | Acquired |
| April 24, 2009 | LFUS | Stock Option (Right to Buy) | Common Stock (4,213) | $13.88 | April 24, 2016 | 4,213 | Acquired |
| April 25, 2008 | LFUS | Stock Option (Right to Buy) | Common Stock (2,415) | $36.33 | April 25, 2015 | 2,415 | Acquired |
| Feb. 16, 2006 | BC | Non-Qualified Stock Option (right to buy) [F1] | Common Stock (20,000) | $19.92 | Feb. 6, 2011 | 20,000 | Disposed |
| Feb. 14, 2006 | BC | Non-Qualified Stock Option (right to buy) [F3] | Common Stock (15,000) | $39.15 | Feb. 14, 2016 | 15,000 | Acquired |
| July 21, 2005 | BC | Non-Qualified Stock Option (right to buy) [F1] | Common Stock (10,000) | $19.92 | Feb. 6, 2011 | 10,000 | Disposed |
| April 6, 2005 | BC | Non-Qualified Stock Option (right to buy) [F1] | Common Stock (5,000) | $18.88 | July 26, 2010 | 5,000 | Disposed |
| Feb. 22, 2005 | BC | Non-Qualified Stock Option (right to buy) [F1] | Common Stock (10,000) | $19.92 | Feb. 6, 2011 | 10,000 | Disposed |
| Jan. 31, 2005 | BC | Stock Settled Stock Appreciation Right [F3] | Common Stock (15,000) | $46.12 | Jan. 31, 2015 | 15,000 | Acquired |
| Sept. 29, 2004 | BC | Non-Qualified Stock Option (right to buy) [F1] | Common Stock (10,000) | $19.92 | Feb. 6, 2011 | 10,000 | Disposed |
| March 8, 2004 | BC | Non-Qualified Stock Option (right to buy) [F1] | Common Stock (5,000) | $33.75 | Nov. 3, 2007 | 5,000 | Disposed |
| March 8, 2004 | BC | Non-Qualified Stock Option (right to buy) [F1] | Common Stock (10,000) | $18.88 | July 26, 2010 | 10,000 | Disposed |
| Feb. 18, 2004 | BC | Non-Qualified Stock Option (right to buy) [F3] | Common Stock (7,000) | $38.36 | Feb. 18, 2014 | 7,000 | Acquired |
| Jan. 21, 2004 | BC | Non-Qualified Stock Option (right to buy) [F3] | Common Stock (8,000) | $22.88 | April 21, 2009 | 8,000 | Disposed |
| Jan. 21, 2004 | BC | Non-Qualified Stock Option (right to buy) [F3] | Common Stock (6,000) | $19.94 | July 28, 2008 | 6,000 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).