Form 13-F position report

AMPRIUS TECHNOLOGIES INC

Reported by GROUP ONE TRADING L P

AMPX CUSIP 03214Q108 Manager CIK 0000932540

First reported at 15,619 shares this quarter.

New
% of reported 13F value < 0.01% This manager · Q4 2023
Shares 15,619 Quarter-end amount reported
Reported value $82,625 Fair value at quarter end
Consecutive quarters held 1 Through Q4 2023

Reported position value by quarter

Reported position value by quarter

Each bar is a Form 13-F quarter-end snapshot. It does not show trades made within the quarter.

Reported position value by quarter
Date Holding Value
2023-12-31 82625
2024-03-31 6429
2024-06-30 0
2024-12-31 415570
2025-03-31 240935
2025-06-30 48432
2025-09-30 303933
2025-12-31 0
2026-06-30 2956504

Quarterly position history

How this manager's reported quarter-end position changed over time.

9 quarters
Quarterly reported position history for AMPRIUS TECHNOLOGIES INC held by GROUP ONE TRADING L P.
Quarter Activity Shares Change % of reported 13F Reported value Filed Source filing
Q2 2026 New 213,312 +213,312 (0.0%) < 0.01% $2,956,504 2026-08-13
Q4 2025 Reduced 0 -28,891 (-100.0%) 0 $0 2026-02-12
Q3 2025 Added 28,891 +17,387 (151.1%) < 0.01% $303,933 2025-11-12
Q2 2025 Reduced 11,504 -78,397 (-87.2%) < 0.01% $48,432 2025-08-14
Q1 2025 Reduced 89,901 -58,517 (-39.4%) < 0.01% $240,935 2025-05-14
Q4 2024 New 148,418 +148,418 (0.0%) < 0.01% $415,570 2025-02-14
Q2 2024 Reduced 0 -2,426 (-100.0%) 0 $0 2024-08-14
Q1 2024 Reduced 2,426 -13,193 (-84.5%) < 0.01% $6,429 2024-05-10
Q4 2023 New 15,619 +15,619 (0.0%) < 0.01% $82,625 2024-02-14

Who else reported the position

53 managers reported AMPRIUS TECHNOLOGIES INC for Q4 2023.

Managers reporting AMPRIUS TECHNOLOGIES INC in Q4 2023.
Manager Activity Shares Change % of reported 13F Reported value Tenure
Invesco Ltd Reduced 1,669,812 -19,312 < 0.01% $8,833,305 2 qtrs
VANGUARD GROUP INC Added 911,510 +52,746 < 0.01% $4,821,887 5 qtrs
BlackRock Inc Added 544,617 +88,562 < 0.01% $2,881,023 5 qtrs
GEODE CAPITAL MANAGEMENT LLC Added 229,441 +28,772 < 0.01% $1,213,959 5 qtrs
STIFEL FINANCIAL CORP Added 149,540 +413 < 0.01% $791,068 6 qtrs
STATE STREET CORPORATION Added 131,690 +39,450 < 0.01% $696,640 5 qtrs
Kestra Advisory Services LLC Added 123,000 +20,950 < 0.01% $650,670 2 qtrs
CHARLES SCHWAB INVESTMENT MANAGEMENT INC Added 96,964 +1,540 < 0.01% $512,940 5 qtrs
NORTHERN TRUST CORPORATION Added 92,445 +19,403 < 0.01% $489,034 5 qtrs
MORGAN STANLEY Added 89,782 +41,955 < 0.01% $474,947 5 qtrs
Premium adds each manager's conviction percentile across reporting peers.
Filing details and methodology As reported
Report period
December 31, 2023
Filed
February 14, 2024
Filing type
13F-HR
Position type
COMMON STOCK

Voting authority reported

Sole
15,619
Shared
0
None
0

“None” means the manager reported no voting authority for those shares on non-routine matters. It does not disclose why and is not evidence of securities lending.

Form 13-F is a delayed quarter-end snapshot of disclosed long Section 13(f) securities. It can be filed up to 45 days after quarter end, excludes short positions and most non-U.S. securities, and does not reveal intra-quarter trading. For options, reported shares and value describe the underlying-share exposure; strike, expiry, premium, and written positions are not disclosed.