AMBA Ambarella, Inc.

NASDAQ
$66.91

Ambarella, Inc. (AMBA) Insider Activity

What the officers, directors and large holders did with their own shares. Only open-market purchases and sales count toward the totals — grants, option exercises and shares withheld for tax are compensation mechanics, not decisions, and they're listed separately below.

30D 90D 6M 1Y
Insider signal In line Selling ran in line with AMBA's own trailing one-year pace, with 43% of sale value under a prearranged plan.
Cluster activity 0 buyers in the last 30 days 0 buyers in the last 90 days 4 sellers in the last 90 days
Insiders buying
0
0 transactions
Insiders selling
8
46 transactions
Purchases
$0
0 shares
Sales
$18.2M
257,683 shares
Net activity
-$18.2M
purchases less sales

How much of that selling was preplanned? 43% planned / 57% discretionary

10b5-1 plan sales $7.8M 13 transactions · 103,218 shares
Discretionary sales $10.5M 33 transactions · 154,465 shares

Largest single sale: $2.0M.

Where they traded

Buy Sell Dot area is proportional to transaction value.

No open-market insider purchase on record.

Recent open-market activity

Date Insider Role Action Shares Price Value Held after
Chen Yun-Lung VP, Business Dev. & Marketing Sell 5,958 $78.66 $468.7K 60,557 −9% of holding
Wang Feng-Ming CEO Sell 10b5-1 16,250 $90.08 $1.5M 773,607 −2.1% of holding
Ju Chi-Hong Senior VP, Systems & GM Sell 10,000 $88.84 $888.4K 155,924 −6% of holding
PAISLEY CHRISTOPHER B Director Sell 10b5-1 250 $62.01 $15.5K 41,029 −0.6% of holding
Wang Feng-Ming CEO Sell 6,204 $67.87 $421.1K 799,857 −0.8% of holding
Young John Alexander CFO Sell 3,186 $67.87 $216.2K 114,437 −2.7% of holding
Lee Chan W Chief Operations Officer Sell 2,951 $67.87 $200.3K 157,098 −1.8% of holding
Ju Chi-Hong Senior VP, Systems & GM Sell 2,017 $67.87 $136.9K 165,924 −1.2% of holding
Young John Alexander CFO Sell 10b5-1 1,847 $66.98 $123.7K 112,590 −1.6% of holding
Chen Yun-Lung VP, Business Development and Sell 9,856 $67.06 $660.9K 66,515 −12.9% of holding
Wang Feng-Ming 3 fills CEO Sell 10b5-1 32,500 $91.01 $3.0M 821,276 −3.8% of holding
Young John Alexander CFO Sell 10b5-1 400 $96.00 $38.4K 117,623 −0.3% of holding
Young John Alexander CFO Sell 10b5-1 1,971 $60.00 $118.3K 117,623 −1.6% of holding
Wang Feng-Ming CEO Sell 8,083 $54.14 $437.6K 838,561 −1% of holding
Lee Chan W Chief Operations Officer Sell 3,641 $54.14 $197.1K 160,049 −2.2% of holding
Young John Alexander CFO Sell 3,038 $54.14 $164.5K 119,594 −2.5% of holding
Ju Chi-Hong Senior VP, Systems & GM, Asia Sell 2,155 $54.14 $116.7K 167,941 −1.3% of holding
Wang Feng-Ming CEO Sell 18,976 $52.77 $1.0M 830,958 −2.2% of holding
Lee Chan W Chief Operations Officer Sell 6,729 $52.77 $355.1K 156,370 −4.1% of holding
Ju Chi-Hong Senior VP, Systems & GM, Asia Sell 4,729 $52.77 $249.5K 164,166 −2.8% of holding
Young John Alexander CFO Sell 4,577 $52.77 $241.5K 117,072 −3.8% of holding
Wang Feng-Ming 5 fills CEO Sell 10b5-1 50,000 $60.80 $3.0M 817,979 −5.8% of holding
Ju Chi-Hong Senior VP, Systems & GM, Asia Sell 7,728 $75.58 $584.1K 146,039 −5% of holding
Ju Chi-Hong 2 fills Senior VP, Systems & GM, Asia Sell 11,710 $70.27 $822.9K 153,767 −7.1% of holding
PAISLEY CHRISTOPHER B Director Sell 500 $72.18 $36.1K 41,279 −1.2% of holding
Young John Alexander CFO Sell 3,791 $72.96 $276.6K 102,738 −3.6% of holding
Wang Feng-Ming CEO Sell 4,950 $71.82 $355.5K 783,979 −0.6% of holding
Young John Alexander CFO Sell 2,579 $71.82 $185.2K 106,529 −2.4% of holding
Lee Chan W Chief Operations Officer Sell 2,406 $71.82 $172.8K 124,566 −1.9% of holding
Ju Chi-Hong Senior VP, Systems & GM, Asia Sell 1,342 $71.82 $96.4K 157,532 −0.8% of holding
Schwarting Elizabeth M Director Sell 624 $72.38 $45.2K 6,690 −8.5% of holding
Ju Chi-Hong Senior VP, Systems & GM, Asia Sell 6,156 $80.96 $498.4K 158,874 −3.7% of holding
Ju Chi-Hong Senior VP, Systems & GM, Asia Sell 5,057 $81.29 $411.1K 165,030 −3% of holding
Schwarting Elizabeth M Director Sell 2,664 $85.38 $227.4K 7,314 −26.7% of holding

Form 4s are due within two business days of a transaction, so this is close to real time — unlike the quarterly 13F data on the Institutional tab. A single large sale often reflects a prearranged 10b5-1 plan rather than a fresh view, so read a pattern of sales rather than any one of them.