Chenming Hu

CIK 1316320 · View on SEC EDGAR ↗

Insider

First SEC filing: Nov. 2, 2017 · Latest: Nov. 2, 2017

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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
March 17, 2025 ACMR S 10b5-1 163,308 $30.00 $4,899,240 100,002 Direct -62.02% Disposed 166.7% (price as of 2026-08-19)
Sept. 22, 2021 AMBA S 10b5-1 3,666 $160.00 $586,560 10,246 Direct -26.35% Disposed -54.3% (price as of 2026-08-19)
Sept. 9, 2021 AMBA S 10b5-1 4,000 $140.00 $560,000 12,953 Direct -23.59% Disposed -47.7% (price as of 2026-08-19)
Sept. 1, 2021 AMBA S 10b5-1 4,000 $120.00 $480,000 16,953 Direct -19.09% Disposed -39.0% (price as of 2026-08-19)
Feb. 12, 2021 ACMR S 10b5-1 10,000 $120.00 $1,200,000 21,102 Direct -32.15% Disposed 100.0% (price as of 2026-08-19)
Dec. 3, 2020 AMBA S 10b5-1 5,818 $88.00 $511,984 18,079 Direct -24.35% Disposed -16.9% (price as of 2026-08-19)
Nov. 27, 2020 AMBA S 10b5-1 5,000 $78.00 $390,000 23,897 Direct -17.30% Disposed -6.2% (price as of 2026-08-19)
Nov. 24, 2020 AMBA S 10b5-1 5,000 $70.67 $353,350 28,897 Direct -14.75% Disposed 3.5% (price as of 2026-08-19)
Aug. 3, 2020 ACMR S 10b5-1 7,806 $100.00 $780,600 0 Direct -100.00% Disposed 140.0% (price as of 2026-08-19)
July 13, 2020 ACMR S 10b5-1 14,000 $84.15 $1,178,100 7,806 Direct -64.20% Disposed 185.2% (price as of 2026-08-19)
June 3, 2020 ACMR S 8,194 $65.12 $533,593 21,806 Direct -27.31% Disposed 268.6% (price as of 2026-08-19)
Sept. 30, 2019 AMBA S 10,000 $63.00 $630,000 29,354 Direct -25.41% Disposed 16.1% (price as of 2026-08-19)

Showing latest 100 of 166 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. 12, 2024 ACMR Stock Option Class A Common Stock (20,000) $18.89 Aug. 11, 2034 20,000 Acquired
Aug. 10, 2023 ACMR Stock Option Class A Common Stock (24,000) — Aug. 9, 2033 24,000 Disposed
Aug. 10, 2023 ACMR Stock Option Class A Common Stock (24,000) $13.24 Aug. 9, 2033 24,000 Disposed
March 15, 2023 AMBA Restricted Stock Units Ordinary Shares (779) — Sept. 15, 2023 779 Disposed
Dec. 16, 2022 AMBA Restricted Stock Units Ordinary Shares (779) — Sept. 15, 2023 779 Disposed
Sept. 16, 2022 AMBA Restricted Stock Units Ordinary Shares (377) — Sept. 15, 2022 377 Disposed
Sept. 1, 2022 AMBA Restricted Stock Units Ordinary Shares (3,117) — Sept. 15, 2023 3,117 Acquired
June 30, 2022 ACMR Stock Option Class A Common Stock (24,000) $16.83 June 29, 2032 24,000 Acquired
June 16, 2022 AMBA Restricted Stock Units Ordinary Shares (377) — Sept. 15, 2022 377 Disposed
March 16, 2022 AMBA Restricted Stock Units Ordinary Shares (377) — Sept. 15, 2022 377 Disposed
Feb. 25, 2022 AMBA Non-Qualified Stock Option (right to buy) Ordinary Shares (5,555) $38.92 Sept. 7, 2024 5,555 Disposed
Dec. 16, 2021 AMBA Restricted Stock Units Ordinary Shares (377) — Sept. 15, 2022 377 Disposed
Sept. 16, 2021 AMBA Restricted Stock Units Ordinary Shares (959) — Sept. 15, 2021 959 Disposed
Sept. 2, 2021 AMBA Restricted Stock Units Ordinary Shares (1,508) — Sept. 15, 2022 1,508 Acquired
June 16, 2021 AMBA Restricted Stock Units Ordinary Shares (958) — Sept. 15, 2021 958 Disposed
May 4, 2021 ACMR Stock Option Class A Common Stock (23,334) $3.00 Dec. 27, 2026 23,334 Acquired
March 30, 2021 ACMR Stock Option Class A Common Stock (10,000) $3.00 Dec. 27, 2026 10,000 Acquired
March 16, 2021 AMBA Restricted Stock Units Ordinary Shares (958) — Sept. 15, 2021 958 Disposed
March 8, 2021 ACMR Stock Option Class A Common Stock (12,334) $7.50 March 8, 2027 12,334 Acquired
March 4, 2021 ACMR Stock Option Class A Common Stock (11,000) $7.50 March 8, 2027 11,000 Acquired
March 2, 2021 ACMR Stock Option Class A Common Stock (10,000) $7.50 March 8, 2027 10,000 Acquired
Feb. 22, 2021 ACMR Stock Option Class A Common Stock (5,000) — Feb. 21, 2031 5,000 Acquired
Feb. 22, 2021 ACMR Stock Option Class A Common Stock (5,000) $119.98 Feb. 21, 2031 5,000 Acquired
Dec. 16, 2020 AMBA Restricted Stock Units Ordinary Shares (958) — Sept. 15, 2021 958 Disposed
Sept. 30, 2020 FTNT Restricted Stock Units Common Stock (448) — — 448 Disposed
Sept. 16, 2020 AMBA Restricted Stock Units Ordinary Shares (858) — — 858 Disposed
Sept. 8, 2020 ACMR Stock Option Class A Common Stock (31,102) $3.00 Dec. 27, 2026 31,102 Disposed
Sept. 4, 2020 AMBA Restricted Stock Units Ordinary Shares (3,833) — Sept. 15, 2021 3,833 Acquired
June 23, 2020 AMBA Non-Qualified Stock Option (right to buy) Ordinary Shares (1,112) $9.99 Feb. 27, 2022 1,112 Disposed
June 16, 2020 AMBA Restricted Stock Units Ordinary Shares (858) — — 858 Disposed
March 17, 2020 AMBA Restricted Stock Units Ordinary Shares (858) — Sept. 15, 2020 858 Disposed
Dec. 17, 2019 AMBA Restricted Stock Units Ordinary Shares (857) — Sept. 15, 2020 857 Disposed
Sept. 17, 2019 AMBA Restricted Stock Units Ordinary Shares (1,312) — Sept. 15, 2019 1,312 Disposed
Sept. 3, 2019 AMBA Restricted Stock Units Ordinary Shares (3,431) — Sept. 15, 2020 3,431 Acquired
June 18, 2019 AMBA Restricted Stock Units Ordinary Shares (1,312) — Sept. 15, 2019 1,312 Disposed
March 19, 2019 AMBA Restricted Stock Units Ordinary Shares (1,312) — Sept. 15, 2019 1,312 Disposed
Dec. 18, 2018 AMBA Restricted Stock Units Ordinary Shares (1,312) — Sept. 15, 2019 1,312 Disposed
Sept. 18, 2018 AMBA Restricted Stock Units Ordinary Shares (1,232) — Sept. 15, 2018 1,232 Disposed
Sept. 4, 2018 AMBA Restricted Stock Units Ordinary Shares (5,248) — Sept. 15, 2019 5,248 Acquired
June 18, 2018 AMBA Restricted Stock Units Ordinary Shares (1,231) — Sept. 15, 2018 1,231 Disposed
March 16, 2018 AMBA Restricted Stock Units Ordinary Shares (1,232) — Sept. 15, 2018 1,232 Disposed
Dec. 18, 2017 AMBA Restricted Stock Units Ordinary Shares (1,231) — Sept. 15, 2018 1,231 Disposed
Sept. 18, 2017 AMBA Restricted Stock Units Ordinary Shares (726) — Sept. 15, 2017 726 Disposed
Sept. 5, 2017 AMBA Restricted Stock Units Ordinary Shares (4,926) — Sept. 15, 2018 4,926 Acquired
June 16, 2017 AMBA Restricted Stock Units Ordinary Shares (726) — Sept. 15, 2017 726 Disposed
March 16, 2017 AMBA Restricted Stock Units Ordinary Shares (726) — Sept. 15, 2017 726 Disposed
Dec. 16, 2016 AMBA Restricted Stock Units Ordinary Shares (726) — Sept. 15, 2017 726 Disposed
Sept. 16, 2016 AMBA Restricted Stock Units Ordinary Shares (1,153) — Sept. 15, 2016 1,153 Disposed
Sept. 6, 2016 AMBA Restricted Stock Units Ordinary Shares (2,904) — Sept. 15, 2017 2,904 Acquired
June 16, 2016 AMBA Restricted Stock Units Ordinary Shares (1,153) — Sept. 15, 2016 1,153 Disposed
March 16, 2016 AMBA Restricted Stock Units Ordinary Shares (1,153) — Sept. 15, 2016 1,153 Disposed
Dec. 16, 2015 AMBA Restricted Stock Units Ordinary Shares (1,152) — Sept. 15, 2016 1,152 Disposed
Oct. 29, 2015 AMBA Restricted Stock Units Ordinary Shares (4,611) — Sept. 15, 2016 4,611 Acquired
Oct. 8, 2015 AMBA Non-Qualified Stock Option (right to buy) Ordinary Shares (10,554) $9.99 Feb. 27, 2022 10,554 Disposed
Oct. 8, 2015 AMBA Non-Qualified Stock Option (right to buy) Ordinary Shares (5,555) $16.35 June 5, 2023 5,555 Disposed
Sept. 16, 2015 AMBA Restricted Stock Units Ordinary Shares (695) — Sept. 7, 2024 695 Disposed
June 16, 2015 AMBA Restricted Stock Units Ordinary Shares (694) — Sept. 7, 2024 694 Disposed
June 9, 2015 AMBA Non-Qualified Stock Option (right to buy) Ordinary Shares (15,000) $9.99 Feb. 27, 2022 15,000 Disposed
May 13, 2015 FTNT Restricted Stock Units Common Stock (331) — — 331 Disposed
May 8, 2015 FTNT Restricted Stock Units Common Stock (1,250) — — 1,250 Disposed
March 17, 2015 AMBA Restricted Stock Units Ordinary Shares (695) — Sept. 7, 2024 695 Disposed
Feb. 13, 2015 FTNT Restricted Stock Units Common Stock (331) — — 331 Disposed
Feb. 8, 2015 FTNT Restricted Stock Units Common Stock (1,250) — — 1,250 Disposed
Dec. 16, 2014 AMBA Restricted Stock Units Ordinary Shares (694) — Sept. 7, 2024 694 Disposed
Nov. 13, 2014 FTNT Restricted Stock Units Common Stock (331) — — 331 Disposed
Nov. 8, 2014 FTNT Restricted Stock Units Common Stock (1,250) — — 1,250 Disposed
Sept. 8, 2014 AMBA Non-Qualified Stock Option (right to buy) Ordinary Shares (5,555) $38.92 Sept. 7, 2024 5,555 Acquired
Sept. 8, 2014 AMBA Restricted Stock Units Ordinary Shares (2,778) — Sept. 7, 2024 2,778 Acquired
Aug. 13, 2014 FTNT Restricted Stock Units Common Stock (1,325) — — 1,325 Disposed
Aug. 8, 2014 FTNT Restricted Stock Units Common Stock (1,250) — — 1,250 Disposed
Aug. 6, 2014 FTNT Restricted Stock Units Common Stock (5,300) — — 5,300 Acquired
June 16, 2014 AMBA Restricted Stock Units Ordinary Shares (695) — June 5, 2023 695 Disposed
May 8, 2014 FTNT Restricted Stock Units Common Stock (1,250) — — 1,250 Disposed
March 17, 2014 AMBA Restricted Stock Units Ordinary Shares (694) — June 5, 2023 694 Disposed
Feb. 8, 2014 FTNT Restricted Stock Units Common Stock (1,250) — — 1,250 Disposed
Dec. 16, 2013 AMBA Restricted Stock Units Ordinary Shares (695) — — 695 Disposed
Nov. 8, 2013 FTNT Restricted Stock Units Common Stock (1,250) — — 1,250 Disposed
Sept. 16, 2013 AMBA Restricted Stock Units Ordinary Shares (694) — — 694 Disposed
Aug. 13, 2013 FTNT Restricted Stock Units Common Stock (5,300) — — 5,300 Acquired
Aug. 8, 2013 FTNT Restricted Stock Units Common Stock (5,000) — — 5,000 Disposed
June 6, 2013 AMBA Restricted Stock Units Ordinary Shares (2,778) — — 2,778 Acquired
June 6, 2013 AMBA Stock Option (Right to Buy) Ordinary Shares (5,555) $16.35 June 6, 2023 5,555 Acquired
Aug. 8, 2012 FTNT Restricted Stock Units Common Stock (20,000) — — 20,000 Acquired
May 20, 2010 FORM Restricted Stock Units Common Stock (6,000) $0.00 — 6,000 Acquired
July 25, 2007 PRSO Option to purchase common stock Common Stock (20,000) $8.08 July 25, 2013 20,000 Acquired
July 26, 2006 PRSO Option to purchase common stock common stock (20,000) $7.22 July 26, 2012 20,000 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
Nov. 2, 2017 ACMR Stock Option→ Class A Common Stock (83,334) 83,334 Direct
Nov. 2, 2017 ACMR Stock Option→ Class A Common Stock (33,334) 33,334 Direct
Nov. 2, 2017 ACMR Stock Option→ Class A Common Stock (33,334) 33,334 Direct
Oct. 9, 2012 AMBA Stock Option (right to buy)→ Ordinary Shares (26,666) 26,666 Direct
Feb. 4, 2005 PRSO Option to Purchase Common Stock→ Common Stock (80,000) 80,000 Direct