Ambarella, Inc.
DE ˙ DB ˙ KYG037AX1015
62,00 € ↓ -5,00 (-7,46%)
2026-06-04
DEL PRIS
SecurityDE:A8B / Ambarella, Inc.
InstitutionAlliancebernstein L.p.
Latest Disclosed Ownership44,258 shares
Latest Disclosed Value $ 3,135,237
Alliancebernstein L.p. reports 62.90% decrease in ownership of A8B / Ambarella, Inc.

On May 15, 2026 - Alliancebernstein L.p. filed a 13F-HR form disclosing ownership of 44,258 shares of Ambarella, Inc. (DE:A8B) valued at $1,847,329 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 119,279 shares of Ambarella, Inc.. This represents a change in shares of -62.90% during the quarter. The current value of the position is $2,743,996 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 44,258 -75,021 -62.90 3,135 -62.90 0.0008
2026-02-17 2025-12-31 13F AMBARELLA SHS G037AX101 119,279 71,512 149.71 8,450 114.39 0.0027
2025-11-14 2025-09-30 13F AMBARELLA SHS G037AX101 47,767 -70,697 -59.68 3,942 -49.64 0.0012
2025-08-14 2025-06-30 13F AMBARELLA SHS G037AX101 118,464 -75,546 -38.94 7,826 -19.85 0.0026
2025-05-15 2025-03-31 13F AMBARELLA SHS G037AX101 194,010 4,775 2.52 9,765 -29.06 0.0035
2025-02-12 2024-12-31 13F AMBARELLA SHS G037AX101 189,235 146,729 345.20 13,765 474.22 0.0047
2024-11-14 2024-09-30 13F AMBARELLA SHS G037AX101 42,506 -1,455 -3.31 2,398 1.10 0.0008
2024-08-14 2024-06-30 13F AMBARELLA SHS G037AX101 43,961 -1,704 -3.73 2,372 2.29 0.0008
2024-05-14 2024-03-31 13F AMBARELLA SHS G037AX101 45,665 -63,008 -57.98 2,318 -65.20 0.0008
2024-02-14 2023-12-31 13F AMBARELLA SHS G037AX101 108,673 -1,645 -1.49 6,661 13.85 0.0026
2023-11-14 2023-09-30 13F AMBARELLA SHS G037AX101 110,318 -32,505 -22.76 5,850 -51.05 0.0025
2023-08-15 2023-06-30 13F AMBARELLA SHS G037AX101 142,823 -56,160 -28.22 11,950 -22.43 0.0049
2023-05-15 2023-03-31 13F AMBARELLA SHS G037AX101 198,983 19,455 10.84 15,405 4.36 0.0066
2023-02-15 2022-12-31 13F AMBARELLA SHS G037AX101 179,528 921 0.52 14,763 47.12 0.0066
2022-11-15 2022-09-30 13F AMBARELLA SHS G037AX101 178,607 34,343 23.81 10,034 6.25 0.0049
2022-08-15 2022-06-30 13F AMBARELLA SHS G037AX101 144,264 -626,460 -81.28 9,444 -88.32 0.0043
2022-05-13 2022-03-31 13F AMBARELLA SHS G037AX101 770,724 -141,797 -15.54 80,864 -56.32 0.0312
2022-02-14 2021-12-31 13F AMBARELLA SHS G037AX101 912,521 -178,140 -16.33 185,141 9.00 0.0655
2021-11-10 2021-09-30 13F AMBARELLA SHS G037AX101 1,090,661 204,441 23.07 169,860 79.75 0.0670
2021-07-30 2021-06-30 13F AMBARELLA SHS G037AX101 886,220 -13,063 -1.45 94,498 4.67 0.0379
2021-05-06 2021-03-31 13F AMBARELLA SHS G037AX101 899,283 -65,241 -6.76 90,279 1.94 0.0396
2021-02-08 2020-12-31 13F AMBARELLA SHS G037AX101 964,524 783,874 433.92 88,563 839.56 0.0418
2020-11-12 2020-09-30 13F AMBARELLA SHS G037AX101 180,650 136,750 311.50 9,426 368.72 0.0051
2020-08-13 2020-06-30 13F AMBARELLA SHS G037AX101 43,900 -25,140 -36.41 2,011 -40.02 0.0012
2020-05-14 2020-03-31 13F AMBARELLA SHS G037AX101 69,040 25,840 59.81 3,353 28.17 0.0024
2020-02-18 2019-12-31 13F AMBARELLA SHS G037AX101 43,200 1,900 4.60 2,616 0.81 0.0015
2019-11-14 2019-09-30 13F AMBARELLA SHS G037AX101 41,300 0 0.00 2,595 42.35 0.0016
2019-08-14 2019-06-30 13F AMBARELLA SHS G037AX101 41,300 -49,270 -54.40 1,823 -53.41 0.0011
2019-05-14 2019-03-31 13F AMBARELLA SHS G037AX101 90,570 20,570 29.39 3,913 59.78 0.0025
2019-02-13 2018-12-31 13F AMBARELLA SHS G037AX101 70,000 28,700 69.49 2,449 53.35 0.0018
2018-11-08 2018-09-30 13F AMBARELLA SHS G037AX101 41,300 0 0.00 1,597 0.13 0.0010
2018-08-13 2018-06-30 13F AMBARELLA SHS G037AX101 41,300 -387,904 -90.38 1,595 -92.41 0.0011
2018-05-14 2018-03-31 13F AMBARELLA SHS G037AX101 429,204 54,054 14.41 21,027 -4.60 0.0152
2018-02-13 2017-12-31 13F AMBARELLA SHS G037AX101 375,150 -119,849 -24.21 22,040 -9.15 0.0158
2017-11-13 2017-09-30 13F AMBARELLA SHS G037AX101 494,999 442,309 839.46 24,260 848.40 0.0182
2017-08-10 2017-06-30 13F AMBARELLA SHS G037AX101 52,690 5,300 11.18 2,558 -1.35 0.0020
2017-05-11 2017-03-31 13F AMBARELLA SHS G037AX101 47,390 0 0.00 2,593 1.09 0.0021
2017-02-13 2016-12-31 13F AMBARELLA SHS G037AX101 47,390 0 0.00 2,565 -26.46 0.0021
2016-11-10 2016-09-30 13F AMBARELLA SHS G037AX101 47,390 -450 -0.94 3,488 43.48 0.0029
2016-08-11 2016-06-30 13F AMBARELLA SHS G037AX101 47,840 -1,700 -3.43 2,431 9.80 0.0021
2016-05-13 2016-03-31 13F AMBARELLA SHS G037AX101 49,540 -1,400 -2.75 2,214 -22.01 0.0019
2016-02-16 2015-12-31 13F/A-1 AMBARELLA SHS G037AX101 50,940 0 0.00 2,839 -3.57 0.0024
2016-02-12 2015-12-31 13F AMBARELLA SHS G037AX101 50,940 2,944
2015-11-13 2015-09-30 13F AMBARELLA SHS G037AX101 50,940 1,340 2.70 2,944 -42.20 0.0025
2015-08-14 2015-06-30 13F AMBARELLA SHS G037AX101 49,600 6,200 14.29 5,093 54.99 0.0042
2015-05-13 2015-03-31 13F AMBARELLA SHS G037AX101 43,400 0 0.00 3,286 49.30 0.0027
2015-02-13 2014-12-31 13F AMBARELLA SHS G037AX101 43,400 -6,700 -13.37 2,201 0.59 0.0018
2014-11-13 2014-09-30 13F AMBARELLA SHS G037AX101 50,100 1,700 3.51 2,188 45.00 0.0018
2014-08-13 2014-06-30 13F AMBARELLA SHS G037AX101 48,400 19,630 68.23 1,509 96.48 0.0013
2014-05-13 2014-03-31 13F AMBARELLA SHS G037AX101 28,770 25,070 677.57 768 509.52 0.0007
2014-02-13 2013-12-31 13F AMBARELLA SHS G037AX101 3,700 3,700 126 0.0001
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.