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Equibles

Granahan Investment Management, LLC

Position in MP — MP Materials Corp. / DE

CIK 1026710 WALTHAM, MA
Back to MP Full portfolio

Position in MP

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$8,325,998
+$1,634,363 QoQ
Shares Held
148,652
+7.2% QoQ
Ownership
0.083%
of shares outstanding
% of Portfolio
0.30%
of 13F equity value
Holder Rank
#100
of 758 holders
Holding Since
Dec 2025
3 quarters on record
Voting authority Sole 90% Shared 0% None 10%

Common Shares in MP Over Time

Shares Held

Position Value (USD)

Position in Other Industrial Metals & Mining

Basic Materials · as of Jun 30, 2026

Granahan Investment Management, LLC holds $30,747,719 across 3 Other Industrial Metals & Mining names. MP ranks #2 (27.1% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 MTRN
MATERION Corp
 69,793 $20,755,740
2 MP
MP Materials Corp. / DE
This page 		148,652 $8,325,998
3 UAMY
United States Antimony Corp
 229,474 $1,665,981

All Filings in MP

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3 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $8,325,998 148,652
2026-03-31 $6,691,635 138,658
2025-12-31 $6,487,626 128,417