There is a long list of 275 institutional holders of AMPH within the last two holding periods in our database of 13F filers, so we've sorted through to present to you just the top 50 institutional holders of AMPH by largest to smallest position reported in the institutional investor's latest 13F filing. In the institutional-holders-of-AMPH table below, the initial column indicates the name of each top institutional holder of AMPH, with a link to that fund's top holdings. The next columns indicate the amount of AMPH stock held by each of the institutional holders of AMPH, followed by the AMPH position size held by the institution, and finally the date of the quarterly 13F filing period the holdings data represents for that institution.

Holder	Amount	Position Size ($ in 1000's)	As of
BlackRock Inc.	6,037,158	$373,398	12/31/2023
AMPH	6,037,158	$373,398	12/31/2023
Federated Hermes Inc.	3,272,761	$202,420	12/31/2023
AMPH	3,272,761	$202,420	12/31/2023
Vanguard Group Inc.	2,815,596	$174,145	12/31/2023
AMPH	2,815,596	$174,145	12/31/2023
Neuberger Berman Group LLC	1,693,002	$104,712	12/31/2023
AMPH	1,693,002	$104,712	12/31/2023
State Street Corp	1,471,137	$90,990	12/31/2023
AMPH	1,471,137	$90,990	12/31/2023
Dimensional Fund Advisors LP	1,339,142	$82,827	12/31/2023
AMPH	1,339,142	$82,827	12/31/2023
Fuller & Thaler Asset Management Inc.	1,273,017	$78,736	12/31/2023
AMPH	1,273,017	$78,736	12/31/2023
Geode Capital Management LLC	846,652	$52,371	12/31/2023
AMPH	846,652	$52,371	12/31/2023
TD Asset Management Inc.	793,559	$49,082	12/31/2023
AMPH	793,559	$49,082	12/31/2023
Renaissance Technologies LLC	641,900	$39,702	12/31/2023
AMPH	641,900	$39,702	12/31/2023
Epoch Investment Partners Inc.	592,530	$36,648	12/31/2023
AMPH	592,530	$36,648	12/31/2023
Price T Rowe Associates Inc. MD	586,957	$36,304	12/31/2023
AMPH	586,957	$36,304	12/31/2023
Northern Trust Corp	575,417	$35,590	12/31/2023
AMPH	575,417	$35,590	12/31/2023
Morgan Stanley	571,113	$35,323	12/31/2023
AMPH	571,113	$35,323	12/31/2023
Invesco Ltd.	400,889	$24,795	12/31/2023
AMPH	400,889	$24,795	12/31/2023
Boone Capital Management LLC	400,000	$24,740	12/31/2023
AMPH	400,000	$24,740	12/31/2023
Charles Schwab Investment Management Inc.	379,480	$23,471	12/31/2023
AMPH	379,480	$23,471	12/31/2023
Granite Investment Partners LLC	365,340	$22,596	12/31/2023
AMPH	365,340	$22,596	12/31/2023
Oberweis Asset Management Inc.	340,265	$21,045	12/31/2023
AMPH	340,265	$21,045	12/31/2023
American Century Companies Inc.	337,690	$20,886	12/31/2023
AMPH	337,690	$20,886	12/31/2023
Nordea Investment Management AB	331,805	$20,346	12/31/2023
AMPH	331,805	$20,346	12/31/2023
Bessemer Group Inc.	325,973	$20,163	12/31/2023
AMPH	325,973	$20,163	12/31/2023
LSV Asset Management	317,600	$19,644	12/31/2023
AMPH	317,600	$19,644	12/31/2023
Bank of New York Mellon Corp	313,338	$19,380	12/31/2023
AMPH	313,338	$19,380	12/31/2023
Mesirow Institutional Investment Management Inc.	252,831	$15,638	12/31/2023
AMPH	252,831	$15,638	12/31/2023
Victory Capital Management Inc.	237,474	$14,688	12/31/2023
AMPH	237,474	$14,688	12/31/2023
Voloridge Investment Management LLC	228,669	$14,143	12/31/2023
AMPH	228,669	$14,143	12/31/2023
Bank of America Corp DE	215,532	$13,331	12/31/2023
AMPH	215,532	$13,331	12/31/2023
Jacobs Levy Equity Management Inc.	208,515	$12,897	12/31/2023
AMPH	208,515	$12,897	12/31/2023
Millennium Management LLC	205,017	$12,680	12/31/2023
AMPH	205,017	$12,680	12/31/2023
Principal Financial Group Inc.	202,953	$12,553	12/31/2023
AMPH	202,953	$12,553	12/31/2023
Nuveen Asset Management LLC	189,847	$11,742	12/31/2023
AMPH	189,847	$11,742	12/31/2023
Janus Henderson Group PLC	165,198	$10,218	12/31/2023
AMPH	165,198	$10,218	12/31/2023
Portolan Capital Management LLC	148,416	$9,180	12/31/2023
AMPH	148,416	$9,180	12/31/2023
Ameriprise Financial Inc.	139,255	$8,613	12/31/2023
AMPH	139,255	$8,613	12/31/2023
Frontier Capital Management Co. LLC	127,537	$7,888	12/31/2023
AMPH	127,537	$7,888	12/31/2023
Two Sigma Advisers LP	127,400	$7,880	12/31/2023
AMPH	127,400	$7,880	12/31/2023
Citadel Advisors LLC		$7,354	12/31/2023
AMPH	116,199	$7,187	12/31/2023
Call	11,300	$699	12/31/2023
Put	8,600	$532	12/31/2023
Goldman Sachs Group Inc.	110,984	$6,864	12/31/2023
AMPH	110,984	$6,864	12/31/2023
Legal & General Group Plc	107,086	$6,623	12/31/2023
AMPH	107,086	$6,623	12/31/2023
Beacon Harbor Wealth Advisors Inc.	103,140	$6,379	12/31/2023
AMPH	103,140	$6,379	12/31/2023
Voya Investment Management LLC	101,953	$6,306	12/31/2023
AMPH	101,953	$6,306	12/31/2023
BNP Paribas Arbitrage SA	97,806	$6,049	12/31/2023
AMPH	97,806	$6,049	12/31/2023
Hillsdale Investment Management Inc.	96,353	$5,959	12/31/2023
AMPH	96,353	$5,959	12/31/2023
Rhumbline Advisers	93,740	$5,798	12/31/2023
AMPH	93,740	$5,798	12/31/2023
Lam Group Inc.	130,800	$5,743	03/31/2024
AMPH	130,800	$5,743	03/31/2024
Raymond James & Associates	92,659	$5,731	12/31/2023
AMPH	92,659	$5,731	12/31/2023
Mutual of America Capital Management LLC	87,757	$5,428	12/31/2023
AMPH	87,757	$5,428	12/31/2023
Squarepoint Ops LLC	83,444	$5,161	12/31/2023
AMPH	83,444	$5,161	12/31/2023
Silvercrest Asset Management Group LLC	83,246	$5,149	12/31/2023
AMPH	83,246	$5,149	12/31/2023

See All: Funds Holding AMPH
See Details: Top 10 Hedge Funds Holding AMPH
Also See: AMPH Insider Buying
Also See: AMPH Holdings Changes

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