Ambarella, Inc.
US ˙ NasdaqGS ˙ KYG037AX1015

SecurityAMBA / Ambarella, Inc.
InstitutionUs Bancorp \de\
Latest Disclosed Ownership820 shares
Latest Disclosed Value $ 42,209
Us Bancorp \de\ reports 60.29% decrease in ownership of AMBA / Ambarella, Inc.

On May 14, 2026 - Us Bancorp \de\ filed a 13F-HR form disclosing ownership of 820 shares of Ambarella, Inc. (US:AMBA) valued at $42,210 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 30, 2026 disclosing 2,065 shares of Ambarella, Inc.. This represents a change in shares of -60.29% during the quarter. The current value of the position is $59,081 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)
2026-05-14 2026-03-31 13F AMBARELLA SHS G037AX101 820 -1,245 -60.29 42 -71.23 0.0000
2026-01-30 2025-12-31 13F AMBARELLA SHS G037AX101 2,065 -1,226 -37.25 146 -46.13 0.0002
2025-11-12 2025-09-30 13F AMBARELLA SHS G037AX101 3,291 -10,365 -75.90 272 -69.96 0.0003
2025-07-24 2025-06-30 13F AMBARELLA SHS G037AX101 13,656 -1,547 -10.18 902 17.91 0.0011
2025-05-08 2025-03-31 13F AMBARELLA SHS G037AX101 15,203 10,381 215.28 765 118.57 0.0010
2025-02-05 2024-12-31 13F AMBARELLA SHS G037AX101 4,822 -2,026 -29.59 351 -9.33 0.0005
2024-10-28 2024-09-30 13F AMBARELLA SHS G037AX101 6,848 -2,003 -22.63 386 -19.08 0.0005
2024-08-07 2024-06-30 13F AMBARELLA SHS G037AX101 8,851 1,065 13.68 478 20.76 0.0007
2024-05-08 2024-03-31 13F AMBARELLA SHS G037AX101 7,786 929 13.55 395 -5.95 0.0006
2024-02-09 2023-12-31 13F AMBARELLA SHS G037AX101 6,857 1,294 23.26 420 42.37 0.0006
2023-11-03 2023-09-30 13F AMBARELLA SHS G037AX101 5,563 -1,714 -23.55 295 -51.48 0.0005
2023-08-10 2023-06-30 13F AMBARELLA SHS G037AX101 7,277 290 4.15 609 12.59 0.0010
2023-05-09 2023-03-31 13F AMBARELLA COMMON STOCK G037AX101 6,987 -777 -10.01 541 -15.36 0.0009
2023-02-13 2022-12-31 13F AMBARELLA COMMON STOCK G037AX101 7,764 -2,179 -21.91 638 14.34 0.0011
2022-10-27 2022-09-30 13F AMBARELLA COMMON STOCK G037AX101 9,943 -5,572 -35.91 558 -45.08 0.0012
2022-08-01 2022-06-30 13F AMBARELLA COMMON STOCK G037AX101 15,515 12,910 495.59 1,016 270.80 0.0020
2022-05-11 2022-03-31 13F AMBARELLA COMMON STOCK G037AX101 2,605 605 30.25 274 -32.35 0.0005
2022-02-11 2021-12-31 13F AMBARELLA COMMON STOCK G037AX101 2,000 -291 -12.70 405 13.76 0.0006
2021-11-10 2021-09-30 13F AMBARELLA COMMON STOCK G037AX101 2,291 33 1.46 356 48.33 0.0007
2021-08-05 2021-06-30 13F AMBARELLA COMMON STOCK G037AX101 2,258 -16 -0.70 240 4.80 0.0004
2021-04-28 2021-03-31 13F AMBARELLA COMMON STOCK G037AX101 2,274 -1,031 -31.20 229 -24.42 0.0005
2021-02-04 2020-12-31 13F AMBARELLA COMMON STOCK G037AX101 3,305 -100 -2.94 303 71.19 0.0007
2020-11-10 2020-09-30 13F AMBARELLA COMMON STOCK G037AX101 3,405 -735 -17.75 177 -6.84 0.0004
2020-08-07 2020-06-30 13F AMBARELLA COMMON STOCK G037AX101 4,140 -705 -14.55 190 -19.15 0.0005
2020-05-13 2020-03-31 13F AMBARELLA COMMON STOCK G037AX101 4,845 -10,686 -68.80 235 -75.03 0.0007
2020-02-04 2019-12-31 13F AMBARELLA COMMON STOCK G037AX101 15,531 -459 -2.87 941 -6.27 0.0024
2019-11-08 2019-09-30 13F AMBARELLA COMMON STOCK G037AX101 15,990 12,004 301.15 1,004 470.45 0.0027
2019-08-13 2019-06-30 13F AMBARELLA COMMON STOCK G037AX101 3,986 1,163 41.20 176 44.26 0.0005
2019-05-08 2019-03-31 13F AMBARELLA COMMON STOCK G037AX101 2,823 177 6.69 122 31.18 0.0004
2019-02-13 2018-12-31 13F AMBARELLA COMMON STOCK G037AX101 2,646 32 1.22 93 -7.92 0.0003
2018-10-31 2018-09-30 13F AMBARELLA COMMON STOCK G037AX101 2,614 281 12.04 101 12.22 0.0003
2018-08-08 2018-06-30 13F AMBARELLA COMMON STOCK G037AX101 2,333 214 10.10 90 -12.62 0.0003
2018-05-08 2018-03-31 13F AMBARELLA COMMON STOCK G037AX101 2,119 152 7.73 103 -11.21 0.0003
2018-02-02 2017-12-31 13F AMBARELLA COMMON STOCK G037AX101 1,967 441 28.90 116 54.67 0.0004
2017-11-13 2017-09-30 13F AMBARELLA COMMON STOCK G037AX101 1,526 597 64.26 75 66.67 0.0002
2017-07-19 2017-06-30 13F AMBARELLA COMMON STOCK G037AX101 929 -313 -25.20 45 -33.82 0.0002
2017-05-03 2017-03-31 13F AMBARELLA COMMON STOCK G037AX101 1,242 1,092 728.00 68 518.18 0.0002
2016-11-04 2016-09-30 13F AMBARELLA COMMON STOCK G037AX101 150 -1,956 -92.88 11 -89.72 0.0000
2016-08-10 2016-06-30 13F AMBARELLA COMMON STOCK G037AX101 2,106 197 10.32 107 24.42 0.0004
2016-05-13 2016-03-31 13F AMBARELLA COMMON STOCK G037AX101 1,909 -177 -8.49 86 -25.86 0.0003
2016-02-10 2015-12-31 13F AMBARELLA COMMON STOCK G037AX101 2,086 -64 -2.98 116 -7.20 0.0005
2015-11-16 2015-09-30 13F AMBARELLA COMMON STOCK G037AX101 2,150 888 70.36 125 -3.10 0.0005
2015-08-10 2015-06-30 13F AMBARELLA COMMON STOCK G037AX101 1,262 41 3.36 129 38.71 0.0005
2015-05-08 2015-03-31 13F AMBARELLA COMMON STOCK G037AX101 1,221 93 8.24 93 60.34 0.0004
2015-02-13 2014-12-31 13F AMBARELLA COMMON STOCK G037AX101 1,128 -1,000 -46.99 58 -37.63 0.0002
2014-11-14 2014-09-30 13F AMBARELLA COMMON STOCK G037AX101 2,128 -2,050 -49.07 93 -28.46 0.0004
2014-08-14 2014-06-30 13F AMBARELLA COMMON STOCK G037AX101 4,178 750 21.88 130 42.86 0.0005
2014-05-14 2014-03-31 13F AMBARELLA COMMON STOCK G037AX101 3,428 -3,871 -53.03 91 -63.16 0.0004
2014-02-13 2013-12-31 13F AMBARELLA COMMON STOCK G037AX101 7,299 7,299 247 0.0010
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.