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WESTFIELD CAPITAL MANAGEMENT CO LP

Position in RIOT — Riot Platforms, Inc.

CIK 1177719 BOSTON, MA

Position in RIOT

as of Mar 31, 2026 · filed May 11, 2026
Position Value
$43,258,516
+$17,567,503 QoQ
Shares Held
3,499,880
+159.2% QoQ
Ownership
0.926%
of shares outstanding
% of Portfolio
0.18%
of 13F equity value
Holder Rank
not a current holder
Holding Since
Mar 2025
4 quarters on record
Voting authority Sole 92.50288581322789.ToString("F0")% Shared 0.ToString("F0")% None 7.497114186772118.ToString("F0")%

Common Shares in RIOT Over Time

Shares Held

Position Value (USD)

Position in Capital Markets

Financial Services · as of Mar 31, 2026

WESTFIELD CAPITAL MANAGEMENT CO LP holds $518,111,970 across 6 Capital Markets names. RIOT ranks #5 (8.3% of the industry book) .

# Ticker Company Shares Value (USD) Open
5 RIOT
Riot Platforms, Inc.
This page
3,499,880 $43,258,516

All Filings in RIOT

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4 filing rows on record
Report Date Value (USD) Shares
2026-03-31 $43,258,516 3,499,880
2025-09-30 $25,691,013 1,350,027
2025-06-30 $19,552,344 1,730,296
2025-03-31 $11,642,460 1,635,177