Ambarella, Inc. (AMBA) Ownership
AMBA ownership summary
as of October 18, 2026- Institutions
- 86.2% of shares outstanding
- Insiders
- 4.32% of shares outstanding
- Shares outstanding
- 44.1M
- Float
- 42.1M shares available to trade
- Short interest
- 14.12% 5.2M shares short
- Days to cover
- 2.62 short interest down 9.7% vs prior month
- Institutions 86.22%
- Insiders 4.32%
- Other investors 9.46%
AMBA top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 8.94% | 3.9M | $243.4M | +155,377 (+4.1%) | June 30, 2026 |
| 2 | Vanguard Portfolio Management, LLC | 8.36% | 3.7M | $227.6M | −28,458 (−0.8%) | June 30, 2026 |
| 3 | T. Rowe Price Associates, Inc. | 5.89% | 2.6M | $160.4M | +1.6M (+172.9%) | June 30, 2026 |
| 4 | State Street Corp | 5.81% | 2.6M | $158.1M | +586,269 (+29.7%) | June 30, 2026 |
| 5 | Vanguard Capital Management, LLC | 4.24% | 1.9M | $115.6M | +58,936 (+3.2%) | June 30, 2026 |
| 6 | Manufacturers Life Insurance Co | 2.69% | 1.2M | $73.2M | −399,541 (−25.2%) | June 30, 2026 |
| 7 | Legal & General Group PLC | 2.53% | 1.1M | $68.9M | +190,333 (+20.5%) | June 30, 2026 |
| 8 | Geode Capital Management, LLC | 2.49% | 1.1M | $67.8M | +68,891 (+6.7%) | June 30, 2026 |
| 9 | MENORA MIVTACHIM HOLDINGS LIMITED | 1.72% | 758K | $46.7M | +757,571 (0.0%) | June 30, 2026 |
| 10 | Stephens Inv Mgmt Group LLC | 1.64% | 722K | $44.5M | +246,570 (+51.9%) | June 30, 2026 |
| 11 | Dimensional Fund Advisors, Inc. | 1.63% | 718K | $44.3M | +79,567 (+12.5%) | June 30, 2026 |
| 12 | Connor Clark & Lunn Inv Mgmt Ltd | 1.55% | 686K | $42.3M | +85,220 (+14.2%) | June 30, 2026 |
| 13 | Exchange Traded Concepts, LLC | 1.43% | 631K | $38.9M | +59,117 (+10.3%) | June 30, 2026 |
| 14 | Morgan Stanley - Brokerage Accounts | 1.39% | 612K | $37.7M | −113,104 (−15.6%) | June 30, 2026 |
| 15 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 1.27% | 562K | $34.7M | +20,112 (+3.7%) | June 30, 2026 |
| 16 | D. E. Shaw & Co LP | 1.17% | 515K | $31.8M | +269,919 (+110.1%) | June 30, 2026 |
| 17 | T. Rowe Price Investment Management,Inc. | 1.16% | 514K | $31.7M | +255,769 (+99.2%) | June 30, 2026 |
| 18 | Jacobs Levy Equity Management, Inc. | 1.14% | 504K | $31.1M | +139,980 (+38.4%) | June 30, 2026 |
| 19 | AQR Capital Management LLC | 1.12% | 496K | $30.6M | −232 (−0.0%) | June 30, 2026 |
| 20 | Nuveen, LLC | 0.99% | 439K | $27.1M | −48,818 (−10.0%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 15 holders added 4.6M shares and 5 cut 590K.
AMBA top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | T. Rowe Price Mid-Cap Value | 3.04% | 1.3M | $82.9M | +239,300 (+21.7%) | September 30, 2026 |
| 2 | Vanguard MStar Total Stk Mkt Idx Invest | 3.00% | 1.3M | $81.7M | −1,642 (−0.1%) | August 31, 2026 |
| 3 | iShares Russell 2000 ETF | 2.50% | 1.1M | $68.2M | −12,736 (−1.1%) | September 30, 2026 |
| 4 | State Street® SPDR® S&P® Smcndctr ETF | 2.38% | 1.0M | $64.7M | +4,449 (+0.4%) | September 30, 2026 |
| 5 | Vanguard Information Technology ETF | 2.30% | 1.0M | $62.7M | +2,339 (+0.2%) | September 30, 2026 |
| 6 | Vanguard Small Cap Index | 2.13% | 939K | $57.9M | −19,643 (−2.1%) | September 30, 2026 |
| 7 | Vanguard Explorer Inv | 1.80% | 796K | $49.1M | +297,331 (+59.7%) | June 30, 2026 |
| 8 | L&G Artificial Intelligence ETF | 1.47% | 650K | $40.1M | −9,417 (−1.4%) | September 30, 2026 |
| 9 | Vanguard MStar Small Cap Growth Indx Inv | 1.18% | 522K | $32.2M | −26,391 (−4.8%) | September 30, 2026 |
| 10 | Robo Global® Robotics&Automation ETF | 1.06% | 467K | $28.8M | — | September 30, 2026 |
| 11 | Fidelity Small Cap Index | 1.06% | 466K | $28.8M | +3,693 (+0.8%) | July 31, 2026 |
| 12 | Vanguard Strategic Equity Inv | 0.98% | 432K | $26.7M | −91,417 (−17.5%) | June 30, 2026 |
| 13 | WisdomTree Art Intelligence ETF USD Acc | 0.95% | 420K | $25.9M | — | September 30, 2026 |
| 14 | L&G ROBO Global Rbtc and Atmtn ETF | 0.91% | 404K | $24.9M | −796 (−0.2%) | September 30, 2026 |
| 15 | iShares Russell 2000 Growth ETF | 0.90% | 399K | $24.6M | −505 (−0.1%) | September 30, 2026 |
| 16 | JHancock Small Cap Core NAV | 0.89% | 394K | $24.3M | −24,251 (−5.8%) | August 31, 2026 |
| 17 | Global X Artfcl Intlgc & Tech ETF | 0.89% | 391K | $24.1M | — | September 30, 2026 |
| 18 | Stt Strt®SPDR®S&PKenshoNwEcosComposETF | 0.79% | 347K | $21.4M | — | September 30, 2026 |
| 19 | T. Rowe Price New Horizons | 0.74% | 326K | $20.1M | — | September 30, 2026 |
| 20 | Oberweis Micro-Cap | 0.69% | 302K | $18.7M | +47,069 (+18.4%) | June 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
AMBA insider transactions
latest 20| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-04-21 | John Alexander Young | Sell | $60.00 | 1,971 | $118,260 |
| 2026-03-19 | Chan W Lee | Sell | $54.14 | 3,641 | $197,124 |
| 2026-03-19 | Chi-Hong Ju | Sell | $54.14 | 2,155 | $116,672 |
| 2026-03-19 | Feng-Ming Wang | Sell | $54.14 | 8,083 | $437,614 |
| 2026-03-19 | John Alexander Young | Sell | $54.14 | 3,038 | $164,477 |
| 2026-03-17 | Chan W Lee | Sell | $52.77 | 6,729 | $355,089 |
| 2026-03-17 | Chi-Hong Ju | Sell | $52.77 | 4,729 | $249,549 |
| 2026-03-17 | Feng-Ming Wang | Sell | $52.77 | 18,976 | $1.0M |
| 2026-03-17 | John Alexander Young | Sell | $52.77 | 4,577 | $241,528 |
| 2026-03-02 | Feng-Ming Wang | Sell | $60.80 | 50,000 | $3.0M |
| 2026-01-05 | Chi-Hong Ju | Sell | $75.58 | 7,728 | $584,082 |
| 2025-12-30 | Chi-Hong Ju | Sell | $70.32 | 3,765 | $264,755 |
| 2025-12-26 | Christopher B Paisley | Sell | $72.18 | 500 | $36,090 |
| 2025-12-18 | John Alexander Young | Sell | $72.96 | 3,791 | $276,591 |
| 2025-12-17 | Chan W Lee | Sell | $71.82 | 2,406 | $172,799 |
| 2025-12-17 | John Alexander Young | Sell | $71.82 | 2,579 | $185,224 |
| 2025-12-17 | Feng-Ming Wang | Sell | $71.82 | 4,950 | $355,509 |
| 2025-12-17 | Chi-Hong Ju | Sell | $71.82 | 1,342 | $96,382 |
| 2025-12-16 | Elizabeth M Schwarting | Sell | $72.38 | 624 | $45,165 |
| 2025-10-14 | Chi-Hong Ju | Sell | $80.96 | 6,156 | $498,390 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
AMBA shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns AMBA
Institutional investors own 86.2% of Ambarella's shares and insiders 4.32%. The largest holder is BlackRock Inc with 8.94% of the shares (3.9M), as of June 30, 2026. Among the top 20 institutions, 15 added shares and 5 reduced their stake in the latest filings. Short interest is 14.12% of the float, or 2.62 days of average trading volume. The share count rose 31.4% since 2014.
Related: AMBA analyst forecast, AMBA key metrics. See the AMBA stock overview for the latest quote and news.
AMBA ownership FAQ
Who owns the most Ambarella stock?
The largest shareholders of Ambarella are BlackRock Inc (8.94%), Vanguard Portfolio Management, LLC (8.36%), T. Rowe Price Associates, Inc. (5.89%), State Street Corp (5.81%), Vanguard Capital Management, LLC (4.24%).
What percentage of Ambarella is owned by institutions?
Institutions hold 86.2% of Ambarella's shares outstanding; insiders hold 4.32%.
Which funds own Ambarella?
The largest fund holders of Ambarella are T. Rowe Price Mid-Cap Value (3.04%), Vanguard MStar Total Stk Mkt Idx Invest (3.00%), iShares Russell 2000 ETF (2.50%), State Street® SPDR® S&P® Smcndctr ETF (2.38%), Vanguard Information Technology ETF (2.30%).
What is Ambarella's short interest?
5.2M shares of Ambarella were sold short, 14.12% of the float; at the average daily volume it would take 2.62 days to cover.
Are insiders buying or selling Ambarella?
Of the latest 20 reported insider transactions in Ambarella (since October 14, 2025), 0 were purchases and 20 were sales.
How many shares of Ambarella are outstanding?
Ambarella has 44.1M shares outstanding, of which 42.1M are in the public float.