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AMBA · Ambarella Inc

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$74.59 -0.23 (-0.31%) At close · Aug 19
Market Cap
$3.28B
Shares
43.87M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 340
Total Value: $3,260,043,149
Total Shares: 37,997,115

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 340 13F filers · Δ vs Mar 31, 2026
Top Holder
10.4%
Sep 2023 → Jun 2026 · range 10.1% – 14.1%
+0.2 pts
Top 5
38.6%
Sep 2023 → Jun 2026 · range 34.1% – 38.6%
+4.1 pts
Top 10
52.0%
Sep 2023 → Jun 2026 · range 46.4% – 53.7%
+2.4 pts
HHI
400
Sep 2023 → Jun 2026 · range 366 – 434
Broadly held+34

Quarterly Activity

vs Mar 31, 2026
New
88
Increased
119
Decreased
89
Sold Out
58
Unchanged
44
Holder count: +30
Institutional value: +69.5%
Shares held: +1.7%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 357
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1280263 CUSIP G037AX101 13F (30d) 316 filings 308 filers Visit website Investor relations