13F institutional ownership facts
Institutions tracked
40
Reported value
$283,509,492.00
Reported shares
14,452,603
Latest filing period
Q1 2026
Top institutional holders
- Renaissance Technologies · $10,850,901 · 0.02%
- David E. Shaw - D.E. Shaw & Co. · $13,037,968 · 0.01%
- Josef Lakonishok - Lsv Asset Management · $12,767,000 · 0.03%
- Israel Englander - Millennium Management · $7,275,197 · <0.01%%
- Two Sigma Investments · $2,706,319 · <0.01%%
- BNP Paribas · $3,057,548 · <0.01%%
Data source and limitations
This page uses public SEC Form 13F disclosures and related institutional filing data. 13F reports are periodic disclosures and may not represent current real-time holdings.
13F Hub provides research and education data only. It does not provide personalized investment advice.
$AMPH
Institutional Holdings
40
Top Institutions
Top Institutions
Renaissance Technologies
553,900 shares
0.02%
% of Portfolio
David E. Shaw - D.E. Shaw & Co.
665,542 shares
0.01%
% of Portfolio
Josef Lakonishok - Lsv Asset Management
651,714 shares
0.03%
% of Portfolio
Israel Englander - Millennium Management
371,373 shares
NaN%
% of Portfolio
Two Sigma Investments
138,148 shares
NaN%
% of Portfolio
BNP Paribas
156,077 shares
NaN%
% of Portfolio
Jane Street Group
92,475 shares
NaN%
% of Portfolio
Larry Fink - BlackRock
5,421,343 shares
NaN%
% of Portfolio
Robeco Institutional Asset Management
66,407 shares
NaN%
% of Portfolio
Invesco
604,774 shares
NaN%
% of Portfolio
UBS Group
420,263 shares
NaN%
% of Portfolio
Geode Capital Management
976,650 shares
NaN%
% of Portfolio
State Street Corp
1,607,515 shares
NaN%
% of Portfolio
Northern Trust Corp
372,279 shares
NaN%
% of Portfolio
Charles Schwab
321,039 shares
NaN%
% of Portfolio
Ken Griffin - Citadel Advisors
65,540 shares
NaN%
% of Portfolio
David Solomon - Goldman Sachs
329,388 shares
NaN%
% of Portfolio
SG Americas Securities
32,806 shares
NaN%
% of Portfolio
Cliff Asness - AQR Capital Management
78,778 shares
NaN%
% of Portfolio
Franklin Resources
139,305 shares
NaN%
% of Portfolio
Morgan Stanley
420,337 shares
NaN%
% of Portfolio
AllianceBernstein (AB)
56,430 shares
NaN%
% of Portfolio
Nuveen
76,595 shares
NaN%
% of Portfolio
Legal & General
80,916 shares
NaN%
% of Portfolio
Canada Pension Plan Investment Board
16,300 shares
NaN%
% of Portfolio
Janus Henderson Group
16,868 shares
NaN%
% of Portfolio
T. Rowe Price
44,903 shares
NaN%
% of Portfolio
PNC Financial Services
5,449 shares
NaN%
% of Portfolio
Lazard Asset Management
0 shares
0.00%
% of Portfolio
Dmitry Balyasny - Balyasny Asset Management
0 shares
0.00%
% of Portfolio
Chuck Royce - Royce & Associates
406,175 shares
0.08%
% of Portfolio
PSP Investments
126,574 shares
0.01%
% of Portfolio
Segall Bryant & Hamill, LLC
33,318 shares
0.01%
% of Portfolio
Verition Fund Management LLC
18,597 shares
NaN%
% of Portfolio
New York State Teachers Retirement System
21,825 shares
NaN%
% of Portfolio
Joel Greenblatt - Gotham Asset Management
0 shares
0.00%
% of Portfolio
Hotchkis & Wiley
0 shares
0.00%
% of Portfolio
Exoduspoint Capital Management, Lp
0 shares
0.00%
% of Portfolio
John Hussman - Hussman Strategic Advisors
63,000 shares
0.27%
% of Portfolio
Jamie Dimon - JPMorgan Chase
0 shares
0.00%
% of Portfolio
Institutional InsightPRO
Scale Distribution
MEGA
29%
LARGE
23%
MEDIUM
27%
SMALL
21%
Geographic Distribution
Institutional Activity
Buyers
34
Sellers
18
Holders
92
New
9
Exited
13
Insider TradingPRO
Trading Statistics
Insider Buyers
12
Insider Sellers
18
Purchase Value
$24.4M
Role Distribution
RatingPRO
89
A
Overall Score
Strong institutional support with positive momentum
Rating Dimensions
Recent Actions
New
9
Increased
23
Decreased
20
Exited
6
Total
50