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WESTFIELD CAPITAL MANAGEMENT CO LP

Position in VST — Vistra Corp.

CIK 1177719 BOSTON, MA

Position in VST

as of Jun 30, 2026 · filed Aug 12, 2026
Position Value
$70,707,577
-$3,686,981 QoQ
Shares Held
445,739
-9.9% QoQ
Ownership
0.133%
of shares outstanding
% of Portfolio
0.23%
of 13F equity value
Holder Rank
#101
of 1,395 holders
Holding Since
Jun 2024
9 quarters on record
Voting authority Sole 89% Shared 0% None 11%

Common Shares in VST Over Time

Shares Held

Position Value (USD)

Position in Utilities - Independent Power Producers

Utilities · as of Jun 30, 2026

WESTFIELD CAPITAL MANAGEMENT CO LP holds $122,613,033 across 2 Utilities - Independent Power Producers names. VST ranks #1 (57.7% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 VST
Vistra Corp.
This page
445,739 $70,707,577

All Filings in VST

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9 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $70,707,577 445,739
2026-03-31 $74,394,558 494,875
2025-12-31 $86,141,346 533,945
2025-09-30 $96,502,355 492,560
2025-06-30 $100,642,819 519,286
2025-03-31 $39,030,244 332,342
2024-12-31 $63,718,550 462,164
2024-09-30 $38,777,041 327,122
2024-06-30 $23,841,308 277,289