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Insider Trading Intelligence
Pricing
…
CJ

Chi-hong Ju

AMBA
SR. VICE PRESIDENT, SYSTEMS · AMBARELLA INC · CIK 0001882831
FILING MIX · LIFETIME26%/74%
BUYS
25
SELLS
70
TOTAL VALUE
$10.00M
COMPANIES
1
ACTIVE SINCE
Sep 2021
HOLDINGS NOW
155,924
AVG SELL PX
$77.89
TRADE KIND
SHOWING 95 / 95
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
41 backtested trades · 8 horizons · 27 pending
Forward-return performance of every backtestable P/S trade by Chi-hong Ju, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d41+51.22%+0.73%+0.56%+0.17%-0.30%0.15
14d41+63.41%-1.75%+0.77%-2.52%-3.18%-2.01
30d41+53.66%-3.35%+0.91%-4.26%-3.39%-2.34
60d41+65.85%-5.13%+1.76%-6.89%-9.83%-2.64
90d41+70.73%-12.50%+1.24%-13.74%-12.65%-4.01
180d41(2 pending)+61.54%-9.43%+4.73%-14.15%-17.06%-3.39
1y41(9 pending)+71.88%-13.69%+11.15%-24.83%-19.45%-5.85
2y41(16 pending)+68.00%-20.60%+33.01%-53.61%-68.50%—
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
AMBA · 155,924 shares · as of Jul 1, 2026
047,02394,047141,070188,09320222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
2026
FLOW · 25 buys / 70 sellsCOVERAGE · 21 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
AMBA
AMBARELLA INC
SALE
Senior VP, Systems & GM
10,000$88.84$888.4K155,924Jul 1, 2026Jul 2, 2026 ↗View →
AMBA
AMBARELLA INC
SALE
Senior VP, Systems & GM
2,017$67.87$136.9K165,924Jun 17, 2026Jun 18, 2026 ↗View →
AMBA
AMBARELLA INC
SALE
Senior VP, Systems & GM, Asia
2,155$54.14$116.7K167,941Mar 19, 2026Mar 19, 2026 ↗View →
AMBA
AMBARELLA INC
PURCHASEGRANT
Stock grant
5,930——170,096Mar 18, 2026Mar 19, 2026 ↗View →
AMBA
AMBARELLA INC
SALE
Senior VP, Systems & GM, Asia
4,729$52.77$249.5K164,166Mar 17, 2026Mar 19, 2026 ↗View →
AMBA
AMBARELLA INC
SALE
Senior VP, Systems & GM, Asia
9,553——0Mar 17, 2026Mar 19, 2026 ↗View →
AMBA
AMBARELLA INC
PURCHASE
Senior VP, Systems & GM, Asia
9,553——168,895Mar 17, 2026Mar 19, 2026 ↗View →
AMBA
AMBARELLA INC
PURCHASEGRANT
Stock grant
17,329——17,329Mar 2, 2026Mar 4, 2026 ↗View →
AMBA
AMBARELLA INC
PURCHASEGRANT
Stock grant
17,329——159,188Mar 2, 2026Mar 4, 2026 ↗View →
AMBA
AMBARELLA INC
SALE
Senior VP, Systems & GM, Asia
7,728$75.58$584.1K146,039Jan 5, 2026Jan 7, 2026 ↗View →
AMBA
AMBARELLA INC
SALE
Senior VP, Systems & GM, Asia
7,945$70.25$558.1K149,587Dec 30, 2025Jan 23, 2026 ↗View →
AMBA
AMBARELLA INC
SALE
Senior VP, Systems & GM, Asia
3,765$70.32$264.8K153,767Dec 30, 2025Dec 31, 2025 ↗View →
AMBA
AMBARELLA INC
SALE
Senior VP, Systems & GM, Asia
1,342$71.82$96.4K157,532Dec 17, 2025Dec 19, 2025 ↗View →
AMBA
AMBARELLA INC
SALE
Senior VP, Systems & GM, Asia
6,156$80.96$498.4K158,874Oct 14, 2025Oct 15, 2025 ↗View →
AMBA
AMBARELLA INC
SALE
Senior VP, Systems & GM, Asia
5,057$81.29$411.1K165,030Oct 13, 2025Oct 15, 2025 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
1,168$79.43$92.8K170,087Sep 17, 2025Sep 19, 2025 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
1,108$52.26$57.9K171,032Jun 17, 2025Jun 20, 2025 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
1,034$55.02$56.9K172,140Mar 18, 2025Mar 20, 2025 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
1,859$55.11$102.4K172,940Mar 6, 2025Mar 7, 2025 ↗View →
AMBA
AMBARELLA INC
PURCHASEGRANT
Stock grant
4,773——174,799Mar 5, 2025Mar 7, 2025 ↗View →
AMBA
AMBARELLA INC
PURCHASEGRANT
Stock grant
12,388——170,026Feb 28, 2025Mar 7, 2025 ↗View →
AMBA
AMBARELLA INC
PURCHASEGRANT
Stock grant
12,388——12,388Feb 28, 2025Mar 7, 2025 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
1,048$75.41$79.0K157,638Dec 16, 2024Dec 18, 2024 ↗View →
AMBA
AMBARELLA INC
SALEGRANT
Gift
593——163,804Dec 9, 2024Dec 10, 2024 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
3,000$75.72$227.2K158,686Dec 9, 2024Dec 10, 2024 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
2,118$75.69$160.3K161,686Dec 9, 2024Dec 10, 2024 ↗View →
AMBA
AMBARELLA INC
SALEGRANT
Gift
5,000——164,397Dec 4, 2024Dec 6, 2024 ↗View →
AMBA
AMBARELLA INC
PURCHASEGRANT
Gift
5,000——8,000Dec 4, 2024Dec 6, 2024 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
1,050$53.54$56.2K172,397Sep 17, 2024Sep 19, 2024 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
6,000$52.90$317.4K173,193Jun 26, 2024Jun 27, 2024 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
8,900$55.53$494.2K179,193Jun 21, 2024Jun 24, 2024 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
8,900——0Jun 21, 2024Jun 24, 2024 ↗View →
AMBA
AMBARELLA INC
PURCHASE
Sr. Vice President, Systems
8,900$38.92$346.4K188,093Jun 21, 2024Jun 24, 2024 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
1,059$55.48$58.8K179,193Jun 18, 2024Jun 20, 2024 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
1,895$57.50$109.0K180,252Jun 10, 2024Jun 11, 2024 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
2,296$56.79$130.4K182,147Jun 7, 2024Jun 11, 2024 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
778$49.27$38.3K184,443Mar 18, 2024Mar 20, 2024 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
509$57.16$29.1K185,003Mar 8, 2024Mar 11, 2024 ↗View →
AMBA
AMBARELLA INC
PURCHASEGRANT
Stock grant
1,224——185,512Mar 7, 2024Mar 11, 2024 ↗View →
AMBA
AMBARELLA INC
PURCHASEGRANT
Stock grant
15,898——15,898Feb 29, 2024Mar 4, 2024 ↗View →
AMBA
AMBARELLA INC
PURCHASEGRANT
Stock grant
15,898——184,288Feb 29, 2024Mar 4, 2024 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
1,074$63.04$67.7K168,390Dec 19, 2023Dec 21, 2023 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
1,048$57.30$60.1K169,464Sep 18, 2023Sep 20, 2023 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
1,015$84.80$86.1K174,600Jun 20, 2023Jun 20, 2023 ↗View →
AMBA
AMBARELLA INC
PURCHASEGRANT
Stock grant
17,814——175,615Jun 15, 2023Jun 20, 2023 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
4,165$82.62$344.1K157,801Jun 8, 2023Jun 9, 2023 ↗View →
AMBA
AMBARELLA INC
PURCHASEGRANT
Stock grant
9,553——9,553Apr 3, 2023Apr 5, 2023 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
4,402$76.85$338.3K161,966Mar 17, 2023Mar 17, 2023 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
14,338——0Mar 15, 2023Mar 17, 2023 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
775——6,206Mar 15, 2023Mar 17, 2023 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
1,195——0Mar 15, 2023Mar 17, 2023 ↗View →
AMBA
AMBARELLA INC
PURCHASE
Sr. Vice President, Systems
12,488——166,368Mar 15, 2023Mar 17, 2023 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
513——2,055Mar 15, 2023Mar 17, 2023 ↗View →
AMBA
AMBARELLA INC
PURCHASEGRANT
Stock grant
9,553——9,553Mar 2, 2023Mar 6, 2023 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
2,000$81.16$162.3K153,689Dec 22, 2022Dec 22, 2022 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
764$80.46$61.5K155,689Dec 19, 2022Dec 20, 2022 ↗View →
AMBA
AMBARELLA INC
PURCHASE
Sr. Vice President, Systems
2,485——157,715Dec 16, 2022Dec 20, 2022 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
776——6,981Dec 16, 2022Dec 20, 2022 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
1,195——1,195Dec 16, 2022Dec 20, 2022 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
1,262$83.77$105.7K156,453Dec 16, 2022Dec 20, 2022 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
514——2,568Dec 16, 2022Dec 20, 2022 ↗View →
AMBA
AMBARELLA INC
PURCHASE
Sr. Vice President, Systems
2,485——156,502Sep 16, 2022Sep 20, 2022 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
514——3,082Sep 16, 2022Sep 20, 2022 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
1,195——2,390Sep 16, 2022Sep 20, 2022 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
1,272$63.25$80.5K155,230Sep 16, 2022Sep 20, 2022 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
776——7,757Sep 16, 2022Sep 20, 2022 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
775——8,533Jun 16, 2022Jun 17, 2022 ↗View →
AMBA
AMBARELLA INC
PURCHASE
Sr. Vice President, Systems
2,483——155,215Jun 16, 2022Jun 17, 2022 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
1,340$66.26$88.8K153,875Jun 16, 2022Jun 17, 2022 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
1,195——3,585Jun 16, 2022Jun 17, 2022 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
513——3,596Jun 16, 2022Jun 17, 2022 ↗View →
AMBA
AMBARELLA INC
PURCHASEGRANT
Stock grant
9,308——9,308Apr 11, 2022Apr 19, 2022 ↗View →
AMBA
AMBARELLA INC
PURCHASEGRANT
Stock grant
9,308——9,308Apr 11, 2022Apr 19, 2022 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
14,598$91.20$1.33M152,732Mar 16, 2022Mar 18, 2022 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
514——4,109Mar 16, 2022Mar 18, 2022 ↗View →
AMBA
AMBARELLA INC
PURCHASE
Sr. Vice President, Systems
31,416——167,330Mar 16, 2022Mar 18, 2022 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
1,189——0Mar 16, 2022Mar 18, 2022 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
1,195——4,780Mar 16, 2022Mar 18, 2022 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
14,259——0Mar 16, 2022Mar 18, 2022 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
1,315$84.42$111.0K135,833Mar 14, 2022Mar 14, 2022 ↗View →
AMBA
AMBARELLA INC
PURCHASEGRANT
Stock grant
3,611——137,148Mar 8, 2022Mar 10, 2022 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
536$206.11$110.5K134,537Dec 30, 2021Dec 31, 2021 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
402$209.98$84.4K135,073Dec 27, 2021Dec 28, 2021 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
1,595$188.90$301.3K135,475Dec 16, 2021Dec 17, 2021 ↗View →
AMBA
AMBARELLA INC
PURCHASE
Sr. Vice President, Systems
2,895——137,070Dec 16, 2021Dec 17, 2021 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
513——4,623Dec 16, 2021Dec 17, 2021 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
1,194——5,975Dec 16, 2021Dec 17, 2021 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
1,188——1,189Dec 16, 2021Dec 17, 2021 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
500$220.81$110.4K133,675Dec 7, 2021Jan 5, 2022 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
500$223.00$111.5K133,175Dec 7, 2021Jan 5, 2022 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
1,495$192.69$288.1K134,175Dec 3, 2021Dec 7, 2021 ↗View →
AMBA
AMBARELLA INC
PURCHASE
Sr. Vice President, Systems
2,897——135,670Dec 3, 2021Dec 7, 2021 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
514——5,136Sep 16, 2021Sep 17, 2021 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
1,188——2,377Sep 16, 2021Sep 17, 2021 ↗View →
AMBA
AMBARELLA INC
SALE
Sr. Vice President, Systems
1,195——7,169Sep 16, 2021Sep 17, 2021 ↗View →
Other insiders · AMBA
Loading peer insiders…
About this filer
CIK 0001882831
ROLE
Sr. Vice President, Systems
PRIMARY
AMBA
COMPANIES
1
ACTIVE SINCE
Sep 2021
MARKETPEEL · /INSIDER/0001882831DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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