安普瑞斯科技公司
US ˙ NYSE ˙ US03214Q1085

SecurityAMPX / Amprius Technologies, Inc.
InstitutionMorgan Stanley
Latest Disclosed Ownership3,162,167 shares
Latest Disclosed Value $ 53,314,136
Morgan Stanley reports 12.54% increase in ownership of AMPX / Amprius Technologies, Inc.

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 3,162,167 shares of Amprius Technologies, Inc. (US:AMPX) valued at $53,314,136 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 2,809,821 shares of Amprius Technologies, Inc.. This represents a change in shares of 12.54% during the quarter. The current value of the position is $62,263,068 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 AMPRIUS TECHNOLOGIES COMMON STOCK 03214Q108 3,162,167 352,346 12.54 53,314 140.49 0.0032
2026-05-27 2025-12-31 13F/A-1 AMPRIUS TECHNOLOGIES COMMON STOCK 03214Q108 2,809,821 66,116 2.41 22,169 -23.19 0.0013
2026-02-13 2025-12-31 13F AMPRIUS TECHNOLOGIES COMMON STOCK 03214Q108 2,809,821 66,116 22,169 0.0013
2026-05-27 2025-09-30 13F/A-1 AMPRIUS TECHNOLOGIES COMMON STOCK 03214Q108 2,743,705 810,078 41.89 28,864 254.58 0.0017
2025-11-14 2025-09-30 13F AMPRIUS TECHNOLOGIES COMMON STOCK 03214Q108 2,743,705 810,078 28,864 0.0017
2025-08-15 2025-06-30 13F AMPRIUS TECHNOLOGIES COMMON STOCK 03214Q108 1,933,627 1,749,989 952.96 8,141 1,554.47 0.0005
2025-05-15 2025-03-31 13F AMPRIUS TECHNOLOGIES COMMON STOCK 03214Q108 183,638 42,593 30.20 492 24.87 0.0000
2025-05-15 2024-12-31 13F/A-1 AMPRIUS TECHNOLOGIES COMMON STOCK 03214Q108 141,045 16,911 13.62 395 187.59 0.0000
2025-02-14 2024-12-31 13F AMPRIUS TECHNOLOGIES COMMON STOCK 03214Q108 141,045 16,911 395 0.0000
2025-05-14 2024-09-30 13F/A-2 AMPRIUS TECHNOLOGIES COMMON STOCK 03214Q108 124,134 36,817 42.16 138 24.55 0.0000
2025-02-14 2024-09-30 13F/A-1 AMPRIUS TECHNOLOGIES COMMON STOCK 03214Q108 124,134 36,817 138 0.0000
2024-11-14 2024-09-30 13F AMPRIUS TECHNOLOGIES COMMON STOCK 03214Q108 124,134 36,817 138 0.0000
2025-05-14 2024-06-30 13F/A-2 AMPRIUS TECHNOLOGIES COMMON STOCK 03214Q108 87,317 -5,851 -6.28 111 -55.28 0.0000
2024-10-17 2024-06-30 13F/A-1 AMPRIUS TECHNOLOGIES COMMON STOCK 03214Q108 87,317 -5,851 111 0.0000
2024-08-14 2024-06-30 13F AMPRIUS TECHNOLOGIES COMMON STOCK 03214Q108 87,317 -5,851 111 0.0000
2024-10-17 2024-03-31 13F/A-2 AMPRIUS TECHNOLOGIES COMMON STOCK 03214Q108 93,168 3,386 3.77 247 -48.10 0.0000
2024-08-16 2024-03-31 13F/A-1 AMPRIUS TECHNOLOGIES COMMON STOCK 03214Q108 93,168 3,386 247 0.0000
2024-05-15 2024-03-31 13F AMPRIUS TECHNOLOGIES COMMON STOCK 03214Q108 93,168 3,386 247 0.0000
2024-08-16 2023-12-31 13F/A-1 AMPRIUS TECHNOLOGIES COMMON STOCK 03214Q108 89,782 41,955 87.72 475 109.73 0.0000
2024-02-13 2023-12-31 13F AMPRIUS TECHNOLOGIES COMMON STOCK 03214Q108 89,782 41,955 475 0.0000
2023-11-15 2023-09-30 13F AMPRIUS TECHNOLOGIES COMMON STOCK 03214Q108 47,827 29,149 156.06 227 68.66 0.0000
2023-08-14 2023-06-30 13F AMPRIUS TECHNOLOGIES COMMON STOCK 03214Q108 18,678 12,011 180.16 134 131.03 0.0000
2023-05-15 2023-03-31 13F AMPRIUS TECHNOLOGIES COMMON STOCK 03214Q108 6,667 -12,889 -65.91 58 -62.58 0.0000
2023-02-14 2022-12-31 13F AMPRIUS TECHNOLOGIES COMMON STOCK 03214Q108 19,556 19,556 155 0.0000
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.