$AMPX

📈 Chart

75 transactions across 19 dates · last 365 days

30d 90d 180d 365d

6-Month Buy/Sell Trend

Buys Sells
▶ 2026-04-01
▼ 2 sells · $23.9M 4 other
Insider Title Type Shares Price $ Value 10b5-1 Filed
Sun Kang — M 1,312,505 $2 $2.3M Plan Apr 2
Sun Kang — M 187,495 $4 $690K Plan Apr 2
Sun Kang — ▼ Sell 1,250,963 $16 $19.7M Plan Apr 2
Sun Kang — ▼ Sell 249,037 $17 $4.2M Plan Apr 2
Sun Kang — M 1,312,505 $2 $2.3M Plan Apr 2
Sun Kang — M 187,495 $4 $690K Plan Apr 2
▶ 2026-03-23
▼ 2 sells · $4.1M
Insider Title Type Shares Price $ Value 10b5-1 Filed
Sun Kang — ▼ Sell 152,823 $19 $2.9M Plan Mar 24
Sun Kang — ▼ Sell 65,046 $19 $1.2M Plan Mar 24
▶ 2026-02-23
▼ 2 sells · $880K
⚡ 2 insiders
Insider Title Type Shares Price $ Value 10b5-1 Filed
Sun Kang — ▼ Sell 61,251 $10 $622K Feb 24
Stefan Constantin Ionel Chief Technology Officer ▼ Sell 25,366 $10 $258K Feb 24
▶ 2026-01-28
▼ 1 sell · $476K 4 other
Insider Title Type Shares Price $ Value 10b5-1 Filed
Stefan Constantin Ionel Chief Technology Officer M 90 $1 $56 Plan Jan 30
Stefan Constantin Ionel Chief Technology Officer M 39,600 $0 $2K Plan Jan 30
Stefan Constantin Ionel Chief Technology Officer ▼ Sell 39,690 $12 $476K Plan Jan 30
Stefan Constantin Ionel Chief Technology Officer M 90 $0 $0 Plan Jan 30
Stefan Constantin Ionel Chief Technology Officer M 39,600 $0 $0 Plan Jan 30
▶ 2026-01-21
▼ 1 sell · $879K 6 other
Insider Title Type Shares Price $ Value 10b5-1 Filed
Stefan Constantin Ionel Chief Technology Officer M 41,563 $1 $26K Plan Jan 23
Stefan Constantin Ionel Chief Technology Officer M 15,834 $0 $792 Plan Jan 23
Stefan Constantin Ionel Chief Technology Officer M 15,883 $0 $794 Plan Jan 23
Stefan Constantin Ionel Chief Technology Officer ▼ Sell 73,280 $12 $879K Plan Jan 23
Stefan Constantin Ionel Chief Technology Officer M 41,563 $0 $0 Plan Jan 23
Stefan Constantin Ionel Chief Technology Officer M 15,834 $0 $0 Plan Jan 23
Stefan Constantin Ionel Chief Technology Officer M 15,883 $0 $0 Plan Jan 23
▶ 2026-01-22
▼ 1 sell · $5.9M 6 other
Insider Title Type Shares Price $ Value 10b5-1 Filed
Stefan Constantin Ionel Chief Technology Officer M 253,928 $0 $13K Plan Jan 23
Stefan Constantin Ionel Chief Technology Officer M 72,795 $0 $33K Plan Jan 23
Stefan Constantin Ionel Chief Technology Officer M 166,104 $0 $8K Plan Jan 23
Stefan Constantin Ionel Chief Technology Officer ▼ Sell 492,827 $12 $5.9M Plan Jan 23
Stefan Constantin Ionel Chief Technology Officer M 253,928 $0 $0 Plan Jan 23
Stefan Constantin Ionel Chief Technology Officer M 72,795 $0 $0 Plan Jan 23
Stefan Constantin Ionel Chief Technology Officer M 166,104 $0 $0 Plan Jan 23
▶ 2026-01-23
▼ 1 sell · $19K 2 other
Insider Title Type Shares Price $ Value 10b5-1 Filed
Stefan Constantin Ionel Chief Technology Officer M 1,600 $0 $80 Plan Jan 23
Stefan Constantin Ionel Chief Technology Officer ▼ Sell 1,600 $12 $19K Plan Jan 23
Stefan Constantin Ionel Chief Technology Officer M 1,600 $0 $0 Plan Jan 23
▶ 2026-01-16
▼ 1 sell · $10.5M 4 other
Insider Title Type Shares Price $ Value 10b5-1 Filed
Sun Kang — M 850,338 $2 $2.1M Plan Jan 20
Sun Kang — M 100,210 $2 $178K Plan Jan 20
Sun Kang — ▼ Sell 950,548 $11 $10.5M Plan Jan 20
Sun Kang — M 850,338 $0 $0 Plan Jan 20
Sun Kang — M 100,210 $0 $0 Plan Jan 20
▶ 2026-01-20
▼ 1 sell · $476K 2 other
Insider Title Type Shares Price $ Value 10b5-1 Filed
Sun Kang — M 43,185 $2 $77K Plan Jan 20
Sun Kang — ▼ Sell 43,185 $11 $476K Plan Jan 20
Sun Kang — M 43,185 $0 $0 Plan Jan 20
▶ 2026-01-12
▼ 1 sell · $5.1M 6 other
Insider Title Type Shares Price $ Value 10b5-1 Filed
Sun Kang — M 180,802 $1 $112K Plan Jan 14
Sun Kang — M 208,264 $2 $508K Plan Jan 14
Sun Kang — M 117,201 $2 $293K Plan Jan 14
Sun Kang — ▼ Sell 506,267 $10 $5.1M Plan Jan 14
Sun Kang — M 180,802 $0 $0 Plan Jan 14
Sun Kang — M 208,264 $0 $0 Plan Jan 14
Sun Kang — M 117,201 $0 $0 Plan Jan 14
▶ 2025-12-19
1 other
Insider Title Type Shares Price $ Value 10b5-1 Filed
Stepien Thomas M President A 200,000 $0 $0 Dec 22
▶ 2025-12-11
▼ 1 sell · $2.1M 2 other
Insider Title Type Shares Price $ Value 10b5-1 Filed
Stefan Constantin Ionel Chief Technology Officer M 125,000 $0 $6K Plan Dec 15
Stefan Constantin Ionel Chief Technology Officer ▼ Sell 198,255 $11 $2.1M Plan Dec 15
Stefan Constantin Ionel Chief Technology Officer M 125,000 $0 $0 Plan Dec 15
▶ 2025-11-21
▼ 2 sells · $944K
⚡ 2 insiders
Insider Title Type Shares Price $ Value 10b5-1 Filed
Sun Kang Chief Executive Officer ▼ Sell 68,655 $10 $692K Nov 25
Stefan Constantin Ionel Chief Technology Officer ▼ Sell 25,024 $10 $252K Nov 25
▶ 2025-11-17
▼ 1 sell · $10.6M 8 other
Insider Title Type Shares Price $ Value 10b5-1 Filed
Sun Kang Chief Executive Officer M 202,934 $1 $199K Plan Nov 19
Sun Kang Chief Executive Officer M 727,950 $0 $36K Plan Nov 19
Sun Kang Chief Executive Officer M 27,463 $1 $17K Plan Nov 19
Sun Kang Chief Executive Officer M 41,653 $1 $26K Plan Nov 19
Sun Kang Chief Executive Officer ▼ Sell 1,000,000 $11 $10.6M Plan Nov 19
Sun Kang Chief Executive Officer M 202,934 $0 $0 Plan Nov 19
Sun Kang Chief Executive Officer M 727,950 $0 $0 Plan Nov 19
Sun Kang Chief Executive Officer M 27,463 $0 $0 Plan Nov 19
Sun Kang Chief Executive Officer M 41,653 $0 $0 Plan Nov 19
▶ 2025-10-06
1 other
Insider Title Type Shares Price $ Value 10b5-1 Filed
RODRIGUEZ RICARDO C. Chief Financial Officer A 200,000 $0 $0 Oct 8
▶ 2025-08-21
▼ 3 sells · $772K
⚡ 3 insiders
Insider Title Type Shares Price $ Value 10b5-1 Filed
Sun Kang Chief Executive Officer ▼ Sell 65,654 $7 $448K Aug 25
Wallach Sandra Chief Financial Officer ▼ Sell 28,390 $7 $194K Aug 25
Stefan Constantin Ionel Chief Technology Officer ▼ Sell 19,159 $7 $131K Aug 25
▶ 2025-06-13
5 other
⚡ 5 insiders
Insider Title Type Shares Price $ Value 10b5-1 Filed
Chu Steven — A 44,444 $0 $0 Jun 17
BAYLESS KATHLEEN A — A 44,444 $0 $0 Jun 17
SATTERTHWAITE LIVINGSTON — A 44,444 $0 $0 Jun 17
DIXON DONALD R — A 44,444 $0 $0 Jun 17
HSIEH Wen Hsuan — A 44,444 $0 $0 Jun 17
▶ 2025-05-21
▼ 3 sells · $286K
⚡ 3 insiders
Insider Title Type Shares Price $ Value 10b5-1 Filed
Sun Kang Chief Executive Officer ▼ Sell 69,786 $2 $170K May 23
Wallach Sandra Chief Financial Officer ▼ Sell 27,595 $2 $67K May 23
Stefan Constantin Ionel Chief Technology Officer ▼ Sell 20,366 $2 $50K May 23
▶ 2025-05-01
1 other
Insider Title Type Shares Price $ Value 10b5-1 Filed
Stepien Thomas M President A 400,000 $0 $0 May 6