Ambarella, Inc.
US ˙ NasdaqGS ˙ KYG037AX1015

SecurityAMBA / Ambarella, Inc.
InstitutionQuantinno Capital Management LP
Latest Disclosed Ownership10,102 shares
Latest Disclosed Value $ 520,004
Quantinno Capital Management LP reports 31.82% decrease in ownership of AMBA / Ambarella, Inc.

On May 15, 2026 - Quantinno Capital Management LP filed a 13F-HR form disclosing ownership of 10,102 shares of Ambarella, Inc. (US:AMBA) valued at $520,000 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 14,816 shares of Ambarella, Inc.. This represents a change in shares of -31.82% during the quarter. The current value of the position is $727,849 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F AMBARELLA SHS G037AX101 10,102 -4,714 -31.82 520 -50.43 0.0009
2026-02-17 2025-12-31 13F AMBARELLA SHS G037AX101 14,816 6,266 73.29 1,050 48.79 0.0021
2025-11-14 2025-09-30 13F AMBARELLA SHS G037AX101 8,550 1,487 21.05 706 51.29 0.0019
2025-08-14 2025-06-30 13F AMBARELLA SHS G037AX101 7,063 2,603 58.36 467 108.04 0.0020
2025-05-12 2025-03-31 13F AMBARELLA SHS G037AX101 4,460 4,460 224 0.0015
2021-02-09 2020-12-31 13F AMBARELLA SHS G037AX101 0 -10,494 -100.00 0 -100.00
2020-11-16 2020-09-30 13F AMBARELLA SHS G037AX101 10,494 2,944 38.99 548 58.38 0.3665
2020-08-14 2020-06-30 13F AMBARELLA SHS G037AX101 7,550 -8,692 -53.52 346 -56.15 0.3412
2020-05-15 2020-03-31 13F AMBARELLA SHS G037AX101 16,242 3,453 27.00 789 1.81 0.4927
2020-02-14 2019-12-31 13F AMBARELLA SHS G037AX101 12,789 2,717 26.98 775 22.43 0.4877
2019-11-14 2019-09-30 13F AMBARELLA SHS G037AX101 10,072 -2,929 -22.53 633 10.28 0.4263
2019-08-14 2019-06-30 13F AMBARELLA SHS G037AX101 13,001 13,001 574 0.3369
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.