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On this page, we present all of the funds holding AMPX from our database of 13F filers, detailed in the table below.
The first column indicates the name of each of the funds holding AMPX, with a link to that fund's top holdings. The next columns
indicate the amount of AMPX stock held by each of the funds holding AMPX, followed by the AMPX position size held by the fund, and lastly the
date of the quarterly filing period the data represents. In total, we count 70 funds holding AMPX within the last two filing periods in our coverage universe of 13F filers,
with the largest position size having been reported by Invesco Ltd.. For more details on the positions held by Invesco Ltd.
(or by any of the other funds holding AMPX), click the fund name in the "Holder" column of the funds-holding-AMPX table below.
| Holder | Amount | Position Size
($ in 1000's) | As of |
|---|
 Invesco Ltd. | 1,669,812 | $8,833 | 12/31/2023 | | AMPX | 1,669,812 | $8,833 | 12/31/2023 |  Group One Trading L.P. | | $8,166 | 12/31/2023 | | Call | 1,533,800 | $8,114 | 12/31/2023 | | AMPX | 15,619 | $83 | 12/31/2023 | | Put | 5,900 | $31 | 12/31/2023 | | Vanguard Group Inc. | 911,510 | $4,822 | 12/31/2023 | | AMPX | 911,510 | $4,822 | 12/31/2023 | | Susquehanna International Group LLP | | $3,727 | 12/31/2023 | | Call | 866,300 | $4,583 | 12/31/2023 | | Put | 180,400 | $954 | 12/31/2023 | | AMPX | 18,586 | $98 | 12/31/2023 | | BlackRock Inc. | 544,617 | $2,881 | 12/31/2023 | | AMPX | 544,617 | $2,881 | 12/31/2023 | | Barclays PLC | | $1,660 | 12/31/2023 | | Call | 290,000 | $1,534 | 12/31/2023 | | AMPX | 23,985 | $126 | 12/31/2023 | | Walleye Capital LLC | | $1,218 | 12/31/2023 | | AMPX.WT | 3,282,240 | $1,280 | 12/31/2023 | | Put | 11,700 | $62 | 12/31/2023 | | Geode Capital Management LLC | 229,441 | $1,214 | 12/31/2023 | | AMPX | 229,441 | $1,214 | 12/31/2023 | | Belvedere Trading LLC | | $923 | 12/31/2023 | | Call | 118,400 | $626 | 12/31/2023 | | AMPX | 56,913 | $301 | 12/31/2023 | | Put | 800 | $4 | 12/31/2023 | | Highbridge Capital Management LLC | | $905 | 12/31/2023 | | AMPX.WT | 2,320,829 | $905 | 12/31/2023 | | Stifel Financial Corp | | $899 | 12/31/2023 | | AMPX | 149,540 | $791 | 12/31/2023 | | AMPX.WT | 276,660 | $108 | 12/31/2023 | | State Street Corp | 131,690 | $697 | 12/31/2023 | | AMPX | 131,690 | $697 | 12/31/2023 | | Kestra Advisory Services LLC | 123,000 | $651 | 12/31/2023 | | AMPX | 123,000 | $651 | 12/31/2023 | | Charles Schwab Investment Management Inc. | 96,964 | $513 | 12/31/2023 | | AMPX | 96,964 | $513 | 12/31/2023 | | Northern Trust Corp | 92,445 | $489 | 12/31/2023 | | AMPX | 92,445 | $489 | 12/31/2023 | | Morgan Stanley | 89,782 | $475 | 12/31/2023 | | AMPX | 89,782 | $475 | 12/31/2023 | | Zazove Associates LLC | | $436 | 12/31/2023 | | AMPX.WT | 1,089,409 | $436 | 12/31/2023 | | Citadel Advisors LLC | | $367 | 12/31/2023 | | Call | 73,800 | $390 | 12/31/2023 | | Put | 4,300 | $23 | 12/31/2023 | | LPL Financial LLC | | $332 | 12/31/2023 | | AMPX | 58,430 | $309 | 12/31/2023 | | AMPX.WT | 60,000 | $23 | 12/31/2023 | | Dryden Capital LLC | | $251 | 12/31/2023 | | AMPX.WT | 644,581 | $251 | 12/31/2023 | | Walleye Trading LLC | | $234 | 12/31/2023 | | AMPX.WT | 600,086 | $234 | 12/31/2023 | | Taconic Capital Advisors LP | | $234 | 12/31/2023 | | AMPX.WT | 600,000 | $234 | 12/31/2023 | | Skaana Management L.P. | | $202 | 12/31/2023 | | AMPX.WT | 347,651 | $136 | 12/31/2023 | | Call | 12,500 | $66 | 12/31/2023 | | Pathstone Holdings LLC | 32,690 | $173 | 12/31/2023 | | AMPX | 32,690 | $173 | 12/31/2023 | | Simplex Trading LLC | | $159 | 03/31/2024 | | Call | 80,300 | $212 | 03/31/2024 | | Put | 45,000 | $119 | 03/31/2024 | | AMPX | 25,093 | $66 | 03/31/2024 | | Westchester Capital Management LLC | | $153 | 12/31/2023 | | AMPX.WT | 393,327 | $153 | 12/31/2023 | | Jane Street Group LLC | 27,911 | $148 | 12/31/2023 | | AMPX | 27,911 | $148 | 12/31/2023 | | Warberg Asset Management LLC | | $145 | 12/31/2023 | | AMPX.WT | 371,879 | $145 | 12/31/2023 | | Kim LLC | | $132 | 12/31/2023 | | AMPX.WT | 337,900 | $132 | 12/31/2023 | | DLD Asset Management LP | | $112 | 12/31/2023 | | Call | 288,434 | $112 | 12/31/2023 | | LMR Partners LLP | | $104 | 12/31/2023 | | AMPX.WT | 265,600 | $104 | 12/31/2023 | | Millennium Management LLC | | $90 | 12/31/2023 | | AMPX | 13,616 | $72 | 12/31/2023 | | Call | 45,558 | $18 | 12/31/2023 | | CSS LLC IL | | $86 | 12/31/2023 | | AMPX.WT | 219,530 | $86 | 12/31/2023 | | FNY Investment Advisers LLC | 16,000 | $84 | 12/31/2023 | | AMPX | 16,000 | $84 | 12/31/2023 | | National Asset Management Inc. | 15,775 | $83 | 12/31/2023 | | AMPX | 15,775 | $83 | 12/31/2023 | | Sandia Investment Management LP | | $77 | 12/31/2023 | | Call | 196,572 | $77 | 12/31/2023 | | Nuveen Asset Management LLC | 13,071 | $69 | 12/31/2023 | | AMPX | 13,071 | $69 | 12/31/2023 | | CNH Partners LLC | | $65 | 12/31/2023 | | AMPX.WT | 167,227 | $65 | 12/31/2023 | | Wolverine Asset Management LLC | | $65 | 12/31/2023 | | AMPX.WT | 167,300 | $65 | 12/31/2023 | | New York State Common Retirement Fund | 12,037 | $64 | 12/31/2023 | | AMPX | 12,037 | $64 | 12/31/2023 | | Alliancebernstein L.P. | 12,160 | $64 | 12/31/2023 | | AMPX | 12,160 | $64 | 12/31/2023 | | Integrated Wealth Concepts LLC | 11,000 | $58 | 12/31/2023 | | AMPX | 11,000 | $58 | 12/31/2023 | | Bank of America Corp DE | 9,224 | $49 | 12/31/2023 | | AMPX | 9,224 | $49 | 12/31/2023 | | Tower Research Capital LLC TRC | 8,252 | $44 | 12/31/2023 | | AMPX | 8,252 | $44 | 12/31/2023 | | Periscope Capital Inc. | | $39 | 12/31/2023 | | AMPX.WT | 100,000 | $39 | 12/31/2023 | | Bank of New York Mellon Corp | 13,531 | $36 | 03/31/2024 | | AMPX | 13,531 | $36 | 03/31/2024 | | JPMorgan Chase & Co. | 6,311 | $33 | 12/31/2023 | | AMPX | 6,311 | $33 | 12/31/2023 | | UBS Group AG | | $31 | 12/31/2023 | | AMPX | 5,898 | $31 | 12/31/2023 | | AMPX.WT | 700 | $0 | 12/31/2023 | | Clear Street LLC | | $31 | 12/31/2023 | | AMPX.WT | 79,684 | $31 | 12/31/2023 | | Advisor Group Holdings Inc. | 5,450 | $29 | 12/31/2023 | | AMPX | 5,450 | $29 | 12/31/2023 | | Rhumbline Advisers | 5,343 | $28 | 12/31/2023 | | AMPX | 5,343 | $28 | 12/31/2023 | | American International Group Inc. | 2,719 | $14 | 12/31/2023 | | AMPX | 2,719 | $14 | 12/31/2023 | | Cambridge Trust Co. | 2,000 | $11 | 12/31/2023 | | AMPX | 2,000 | $11 | 12/31/2023 | | Wells Fargo & Company MN | 1,759 | $9 | 12/31/2023 | | AMPX | 1,759 | $9 | 12/31/2023 | | Banque Cantonale Vaudoise | 2,800 | $7 | 03/31/2024 | | AMPX | 2,800 | $7 | 03/31/2024 | | Cutler Group LP | 2,100 | $6 | 03/31/2024 | | AMPX | 2,100 | $6 | 03/31/2024 | | Strs Ohio | 1,100 | $6 | 12/31/2023 | | AMPX | 1,100 | $6 | 12/31/2023 | | Royal Bank of Canada | 1,167 | $6 | 12/31/2023 | | AMPX | 1,167 | $6 | 12/31/2023 | | DHJJ Financial Advisors Ltd. | 2,000 | $5 | 03/31/2024 | | AMPX | 2,000 | $5 | 03/31/2024 | | California State Teachers Retirement System | 900 | $5 | 12/31/2023 | | AMPX | 900 | $5 | 12/31/2023 | | FMR LLC | 726 | $4 | 12/31/2023 | | AMPX | 726 | $4 | 12/31/2023 | | Legal & General Group Plc | 699 | $4 | 12/31/2023 | | AMPX | 699 | $4 | 12/31/2023 | | Avantax Advisory Services Inc. | | $4 | 12/31/2023 | | AMPX.WT | 10,000 | $4 | 12/31/2023 | | Clear Street Markets LLC | 672 | $4 | 12/31/2023 | | AMPX | 672 | $4 | 12/31/2023 | | TD Waterhouse Canada Inc. | 670 | $4 | 12/31/2023 | | AMPX | 670 | $4 | 12/31/2023 | | Citigroup Inc. | 610 | $3 | 12/31/2023 | | AMPX | 610 | $3 | 12/31/2023 | | Ameritas Investment Partners Inc. | 444 | $2 | 12/31/2023 | | AMPX | 444 | $2 | 12/31/2023 | | Amalgamated Bank | 181 | $0 | 03/31/2024 | | AMPX | 181 | $0 | 03/31/2024 | | CWM LLC | 8 | $0 | 03/31/2024 | | AMPX | 8 | $0 | 03/31/2024 | | Proequities Inc. | | $0 | 12/31/2023 | | Put | 0 | $0 | 12/31/2023 | | AMPX | 0 | $0 | 12/31/2023 | | Call | 0 | $0 | 12/31/2023 | | AMPX.WT | 0 | $0 | 12/31/2023 | | Farther Finance Advisors LLC | 2 | $0 | 12/31/2023 | | AMPX | 2 | $0 | 12/31/2023 |
See Summary: Institutional Holders of AMPX
See Details: Top 10 Hedge Funds Holding AMPX
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