AMBA Ambarella, Inc.
Ambarella, Inc. (AMBA) Institutional Ownership
What the institutions did with AMBA last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended September 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| GEODE CAPITAL MANAGEMENT, LLC | 1.1M | 21.5% |
| DIMENSIONAL FUND ADVISORS LP | 734.0K | 13.9% |
| EXCHANGE TRADED CONCEPTS, LLC | 637.8K | 12.1% |
| PINNACLE ASSOCIATES LTD | 428.7K | 8.1% |
| IMC-Chicago, LLC | 283.9K | 5.4% |
| Russell Investments Group, Ltd. | 150.5K | 2.9% |
| Handelsbanken Fonder AB | 141.0K | 2.7% |
| SWS Partners | 133.6K | 2.5% |
| Nuveen, LLC | 129.1K | 2.5% |
| Mitsubishi UFJ Asset Management Co., Ltd. | 123.0K | 2.3% |
| Bank of New York Mellon Corp | 121.6K | 2.3% |
| FMR LLC | 102.5K | 1.9% |
| RFG Advisory, LLC | 102.2K | 1.9% |
| Squarepoint Ops LLC | 82.5K | 1.6% |
| ESSEX INVESTMENT MANAGEMENT CO LLC | 77.2K | 1.5% |
| DEUTSCHE BANK AG\ | 60.6K | 1.2% |
| Granite Investment Partners, LLC | 45.9K | 0.9% |
| Creative Planning | 45.2K | 0.9% |
| LPL Financial LLC | 44.3K | 0.8% |
| CITIGROUP INC | 39.0K | 0.7% |
| Katamaran Capital LLP | 35.7K | 0.7% |
| HARBOR CAPITAL ADVISORS, INC. | 29.4K | 0.6% |
| WHITE PINE CAPITAL LLC | 28.9K | 0.5% |
| Jefferies Financial Group Inc. | 28.6K | 0.5% |
| Linden Thomas Advisory Services, LLC | 26.1K | 0.5% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| Nuveen, LLC | Reduced | 439.0K | 129.1K | -309.9K |
| Squarepoint Ops LLC | Reduced | 358.9K | 82.5K | -276.4K |
| IMC-Chicago, LLC | Increased | 60.3K | 283.9K | +223.6K |
| FMR LLC | Reduced | 316.0K | 102.5K | -213.5K |
| Robeco Schweiz AG | Sold Out | 106.2K | 0 | -106.2K |
| RFG Advisory, LLC | New | 0 | 102.2K | +102.2K |
| EMERALD ADVISERS, LLC | Reduced | 96.5K | 2.8K | -93.7K |
| DEUTSCHE BANK AG\ | Reduced | 150.2K | 60.6K | -89.5K |
| Russell Investments Group, Ltd. | Increased | 78.9K | 150.5K | +71.6K |
| EMERALD MUTUAL FUND ADVISERS TRUST | Sold Out | 65.7K | 0 | -65.7K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 1.1M | 1.1M | +31.8K |
| Jefferies Financial Group Inc. | New | 0 | 28.6K | +28.6K |
| Y-Intercept (Hong Kong) Ltd | Reduced | 42.7K | 19.1K | -23.7K |
| PINNACLE ASSOCIATES LTD | Increased | 408.8K | 428.7K | +19.8K |
| WBI INVESTMENTS, LLC | Sold Out | 18.5K | 0 | -18.5K |
| CITIGROUP INC | Reduced | 57.3K | 39.0K | -18.3K |
| MACKENZIE FINANCIAL CORP | Sold Out | 18.2K | 0 | -18.2K |
| Diversified Trust Co | Sold Out | 17.4K | 0 | -17.4K |
| Edgestream Partners, L.P. | New | 0 | 16.2K | +16.2K |
| DIMENSIONAL FUND ADVISORS LP | Increased | 718.2K | 734.0K | +15.8K |
| Summit Global Investments | Sold Out | 14.8K | 0 | -14.8K |
| Savant Capital, LLC | New | 0 | 13.6K | +13.6K |
| INTECH INVESTMENT MANAGEMENT LLC | Sold Out | 13.3K | 0 | -13.3K |
| BARCLAYS PLC | Increased | 6.0K | 19.0K | +13.0K |
| Artemis Wealth Advisors, LLC | Sold Out | 12.0K | 0 | -12.0K |
| Thrivent Financial for Lutherans | Sold Out | 10.6K | 0 | -10.6K |
| WESBANCO BANK INC | Sold Out | 10.5K | 0 | -10.5K |
| LPL Financial LLC | Reduced | 53.3K | 44.3K | -9.0K |
| Creative Planning | Increased | 37.0K | 45.2K | +8.2K |
| VIRTUS ADVISERS, LLC | Reduced | 17.4K | 9.3K | -8.2K |
| STRS OHIO | Reduced | 17.7K | 9.6K | -8.1K |
| SteelPeak Wealth, LLC | New | 0 | 7.9K | +7.9K |
| Granite Investment Partners, LLC | Increased | 38.3K | 45.9K | +7.6K |
| BAILARD, INC. | Sold Out | 7.4K | 0 | -7.4K |
| J. Safra Sarasin Holding AG | Increased | 2.8K | 10.1K | +7.2K |
| EXCHANGE TRADED CONCEPTS, LLC | Increased | 630.7K | 637.8K | +7.1K |
| Harbour Capital Advisors, LLC | Sold Out | 7.1K | 0 | -7.1K |
| Handelsbanken Fonder AB | Increased | 134.4K | 141.0K | +6.6K |
| Themes Management Co LLC | Increased | 8.2K | 14.3K | +6.1K |
| HARBOR CAPITAL ADVISORS, INC. | Increased | 23.3K | 29.4K | +6.0K |
| Financiere des Professionnels - Fonds d'investissement inc. | Sold Out | 5.9K | 0 | -5.9K |
| SEB Asset Management AB | New | 0 | 5.0K | +5.0K |
| State of Wyoming | Sold Out | 4.9K | 0 | -4.9K |
| Cambridge Investment Research Advisors, Inc. | Sold Out | 4.7K | 0 | -4.7K |
| ACADIAN ASSET MANAGEMENT LLC | Reduced | 19.9K | 15.9K | -4.0K |
| Caitong International Asset Management Co., Ltd | Increased | 5.7K | 9.4K | +3.7K |
| Robeco Institutional Asset Management B.V. | Reduced | 13.1K | 9.4K | -3.7K |
| NINE MASTS CAPITAL Ltd | New | 0 | 3.0K | +3.0K |
| GREENWOOD CAPITAL ASSOCIATES LLC | Reduced | 7.1K | 4.1K | -2.9K |
| Swiss Life Asset Management Ltd | Sold Out | 2.9K | 0 | -2.9K |
| Abundance Wealth Counselors | Sold Out | 2.8K | 0 | -2.8K |
| ESSEX INVESTMENT MANAGEMENT CO LLC | Reduced | 80.0K | 77.2K | -2.8K |
| McCollum Christoferson Group LLC | Sold Out | 2.8K | 0 | -2.8K |
| TRUIST FINANCIAL CORP | Sold Out | 2.7K | 0 | -2.7K |
| Merit Financial Group, LLC | Sold Out | 2.7K | 0 | -2.7K |
| VIRGINIA RETIREMENT SYSTEMS ET Al | Sold Out | 2.7K | 0 | -2.7K |
| Katamaran Capital LLP | Increased | 33.0K | 35.7K | +2.7K |
| Larson Financial Group LLC | Increased | 1.3K | 3.9K | +2.6K |
| BRIGHTON JONES LLC | Sold Out | 2.6K | 0 | -2.6K |
| SIMPLEX TRADING, LLC | Reduced | 3.1K | 621 | -2.5K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.