13F Insight
DOSSIER · 13F Holders · Q1 2026Basic Materials · Metal Mining
MP

MP MATERIALS CORP

771 institutions still hold MP MATERIALS CORP as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 553368101·Metal Mining·771 13F holders·last filed Mar 31, 2026
Market cap
—
13F value held
$7.2B
visible holders
Holders
771
filers reporting
Concentration
25.53%
UBS Group AG #1
top holder share
AI Holders Summary · Q1 2026

ARS Investment Partners executed a massive fourteen-fold share expansion in MP Materials during Q2 2026, accumulating 275,109 additional shares worth $15.4 million in net capital flow. The move made ARS the top institutional holder at $16.53M, as institutional interest in the rare earths producer surged.

Major Institutional Buyers

  • ARS Investment Partners: Expanded shares from 19,980 to 295,089 (+1,376.9%, +$15.41M flow), securing the single largest institutional position.
  • Covea Finance: Increased position by 144,000 shares (+148.0%, +$8.07M flow) to 241,300 shares ($13.52M).
  • New Institutional Entrants: Teamwork Financial ($10.65M), Sierra Summit ($5.59M), and J.W. Cole ($5.38M) initiated substantial new stakes.
Analysis generated by 13F Insight from SEC Form 13F filing data · Q1 2026. Methodology

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
UBS Group AG
CIK 0001610520
$1.8B37.9M0.27%Q1 202602
Hancock Prospecting Pty Ltd
CIK 0002017993
$751M14.9M23.07%Q4 202503
BlackRock, Inc.
CIK 0002012383
$712M14.7M0.01%Q1 202604
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 0001446194· Market maker
$548M11.4M0.06%Q1 202605
STATE STREET CORP
CIK 0000093751
$357M7.4M0.01%Q1 202606
CITADEL ADVISORS LLC
CIK 0001423053
$351M6.9M0.05%Q4 202507
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$332M6.9M0.01%Q1 202608
Vanguard Portfolio Management
CIK 0002100121· Index
$327M6.8M0.02%Q1 202609
JANE STREET GROUP, LLC
CIK 0001595888· Market maker
$290M6.0M0.04%Q1 202610
MORGAN STANLEY
CIK 0000895421
$268M5.6M0.02%Q1 202611
VAN ECK ASSOCIATES CORP
CIK 0000869178
$221M4.6M0.17%Q1 202612
Invesco Ltd.
CIK 0000914208
$183M3.8M0.02%Q1 202613
REAVES W H & CO INC
CIK 0000740913
$146M2.6M2.22%Q2 202614
COOPERMAN LEON G
CIK 0000898382
$145M3.0M4.75%Q1 202615
D. E. Shaw & Co., Inc.
CIK 0001009207
$134M2.7M0.07%Q4 202516
JPMORGAN CHASE & CO
CIK 0000019617
$133M2.9M0.01%Q1 202617
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$122M2.5M0.01%Q1 202618
PEAK6 LLC
CIK 0001389958
$117M2.4M0.27%Q1 202619
WOLVERINE TRADING, LLC
CIK 0000927337
$104M1.5M0.07%Q3 202520
BANK OF AMERICA CORP /DE/
CIK 0000070858
$97M2.0M0.01%Q1 2026
Page 1 of 39
751 more holders available. Log in →
Insiders at MP MATERIALS CORP
Duckworth Connie K →Myers Richard B →Lavan Maryanne →Weisenburger Randall J →Donald Arnold W →Mcknight Andrew A. →Rosenthal Michael Stuart →Litinsky James H. →