Ambarella, Inc.
IT ˙ BIT ˙ KYG037AX1015
60,38 € ↓ -6,96 (-10,34%)
2026-06-04
CENA AKCJI
SecurityIT:1AMBA / Ambarella, Inc.
InstitutionStifel Financial Corp
Latest Disclosed Ownership27,253 shares
Latest Disclosed Value $ 1,402,865
Stifel Financial Corp reports 171.74% increase in ownership of 1AMBA / Ambarella, Inc.

On May 12, 2026 - Stifel Financial Corp filed a 13F-HR form disclosing ownership of 27,253 shares of Ambarella, Inc. (IT:1AMBA) valued at $1,212,758 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 10,029 shares of Ambarella, Inc.. This represents a change in shares of 171.74% during the quarter. The current value of the position is $1,645,536 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)
2026-05-12 2026-03-31 13F AMBARELLA SHS G037AX101 27,253 17,224 171.74 1,403 97.46 0.0003
2026-02-13 2025-12-31 13F AMBARELLA SHS G037AX101 10,029 -7,362 -42.33 710 -50.52 0.0006
2025-11-12 2025-09-30 13F AMBARELLA SHS G037AX101 17,391 -1,106 -5.98 1,435 17.43 0.0013
2025-08-14 2025-06-30 13F AMBARELLA SHS G037AX101 18,497 4,249 29.82 1,222 70.43 0.0012
2025-05-14 2025-03-31 13F AMBARELLA SHS G037AX101 14,248 -17,545 -55.19 717 -68.99 0.0008
2025-02-13 2024-12-31 13F AMBARELLA SHS G037AX101 31,793 15,397 93.91 2,313 150.22 0.0024
2024-11-14 2024-09-30 13F AMBARELLA SHS G037AX101 16,396 3,224 24.48 925 30.14 0.0010
2024-08-13 2024-06-30 13F AMBARELLA SHS G037AX101 13,172 -2,059 -13.52 711 -8.15 0.0008
2024-05-14 2024-03-31 13F AMBARELLA SHS G037AX101 15,231 1,781 13.24 773 -6.19 0.0009
2024-02-12 2023-12-31 13F AMBARELLA SHS G037AX101 13,450 2,320 20.84 824 39.66 0.0010
2023-11-13 2023-09-30 13F AMBARELLA SHS G037AX101 11,130 -3,027 -21.38 590 -50.17 0.0008
2023-08-14 2023-06-30 13F AMBARELLA SHS G037AX101 14,157 -699 -4.71 1,185 2.96 0.0016
2023-05-12 2023-03-31 13F AMBARELLA SHS G037AX101 14,856 2,188 17.27 1,150 10.47 0.0016
2023-02-13 2022-12-31 13F AMBARELLA SHS G037AX101 12,668 -2,044 -13.89 1,042 25.88 0.0016
2022-11-14 2022-09-30 13F AMBARELLA SHS G037AX101 14,712 1,571 11.95 827 -3.84 0.0014
2022-08-15 2022-06-30 13F AMBARELLA SHS G037AX101 13,141 -2,711 -17.10 860 -48.29 0.0013
2022-05-13 2022-03-31 13F AMBARELLA SHS G037AX101 15,852 1,252 8.58 1,663 -43.86 0.0023
2022-02-14 2021-12-31 13F AMBARELLA SHS G037AX101 14,600 -2,096 -12.55 2,962 13.92 0.0039
2021-11-15 2021-09-30 13F AMBARELLA SHS G037AX101 16,696 -3,307 -16.53 2,600 21.89 0.0038
2021-08-13 2021-06-30 13F AMBARELLA SHS G037AX101 20,003 199 1.00 2,133 7.29 0.0032
2021-05-14 2021-03-31 13F AMBARELLA SHS G037AX101 19,804 457 2.36 1,988 11.94 0.0033
2021-02-12 2020-12-31 13F AMBARELLA SHS G037AX101 19,347 -2,884 -12.97 1,776 53.10 0.0032
2020-11-16 2020-09-30 13F AMBARELLA SHS G037AX101 22,231 1,993 9.85 1,160 25.13 0.0024
2020-08-14 2020-06-30 13F AMBARELLA SHS G037AX101 20,238 -764 -3.64 927 -9.91 0.0021
2020-05-14 2020-03-31 13F AMBARELLA SHS G037AX101 21,002 5,167 32.63 1,029 8.43 0.0028
2020-02-13 2019-12-31 13F AMBARELLA SHS G037AX101 15,835 -1,004 -5.96 949 -10.13 0.0020
2019-11-19 2019-09-30 13F/A-1 AMBARELLA SHS G037AX101 16,839 -22,152 -56.81 1,056 -38.43 0.0027
2019-11-13 2019-09-30 13F AMBARELLA SHS G037AX101 16,839 -22,152 1,056 591.9409
2019-08-14 2019-06-30 13F AMBARELLA SHS G037AX101 38,991 1,278 3.39 1,715 5.28 0.0044
2019-05-14 2019-03-31 13F AMBARELLA SHS G037AX101 37,713 -13,112 -25.80 1,629 -8.02 0.0046
2019-02-13 2018-12-31 13F AMBARELLA SHS G037AX101 50,825 -12,983 -20.35 1,771 -28.50 0.0057
2018-11-13 2018-09-30 13F AMBARELLA SHS G037AX101 63,808 8,783 15.96 2,477 16.18 0.0071
2018-08-14 2018-06-30 13F AMBARELLA SHS G037AX101 55,025 -6,808 -11.01 2,132 -29.64 0.0065
2018-05-11 2018-03-31 13F AMBARELLA SHS G037AX101 61,833 -1,392 -2.20 3,030 -18.68 0.0096
2018-02-14 2017-12-31 13F AMBARELLA SHS G037AX101 63,225 -4,164 -6.18 3,726 12.67 0.0118
2017-11-13 2017-09-30 13F AMBARELLA SHS G037AX101 67,389 -4,626 -6.42 3,307 -5.43 0.0115
2017-08-14 2017-06-30 13F AMBARELLA SHS G037AX101 72,015 -141,566 -66.28 3,497 -70.15 0.0130
2017-05-10 2017-03-31 13F AMBARELLA SHS G037AX101 213,581 49,754 30.37 11,714 32.29 0.0454
2017-02-16 2016-12-31 13F AMBARELLA SHS G037AX101 163,827 4,186 2.62 8,855 -24.77 0.0376
2016-11-15 2016-09-30 13F AMBARELLA SHS G037AX101 159,641 26,716 20.10 11,770 74.29 0.0529
2016-08-17 2016-06-30 13F AMBARELLA SHS G037AX101 132,925 -800 -0.60 6,753 12.98 0.0312
2016-05-16 2016-03-31 13F AMBARELLA SHS G037AX101 133,725 31,966 31.41 5,977 5.40 0.0319
2016-03-21 2015-12-31 13F/A-2 AMBARELLA SHS G037AX101 101,759 31,467 44.77 5,671 39.61 0.0295
2016-02-26 2015-12-31 13F/A-1 AMBARELLA SHS G037AX101 100,269 -1,490 5,589 0.0292
2016-02-16 2015-12-31 13F AMBARELLA SHS G037AX101 100,054 6,783
2015-11-16 2015-09-30 13F AMBARELLA SHS G037AX101 70,292 20,750 41.88 4,062 -20.15 0.0228
2015-08-17 2015-06-30 13F/A-1 AMBARELLA SHS G037AX101 49,542 -20,696 -29.47 5,087 -4.33 0.0263
2015-08-17 2015-06-30 13F AMBARELLA SHS G037AX101 49,531 5,086
2015-05-14 2015-03-31 13F AMBARELLA SHS G037AX101 70,238 8,765 14.26 5,317 70.58 0.0291
2015-02-13 2014-12-31 13F AMBARELLA SHS G037AX101 61,473 -91,348 -59.77 3,117 -53.29 0.0173
2014-11-13 2014-09-30 13F AMBARELLA SHS G037AX101 152,821 121,302 384.85 6,673 578.84 0.0586
2014-08-14 2014-06-30 13F AMBARELLA SHS G037AX101 31,519 31,519 983 0.0088
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.