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GW&K Investment Management, LLC

Position in MTX — Minerals Technologies Inc

CIK 1082917 BOSTON, MA

Position in MTX

as of Jun 30, 2026 · filed Aug 12, 2026
Position Value
$23,471,272
+$657,231 QoQ
Shares Held
317,308
-1.4% QoQ
Ownership
1.02%
of shares outstanding
% of Portfolio
0.19%
of 13F equity value
Holder Rank
#17
of 294 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority Sole 93% Shared 7% None 0%

Common Shares in MTX Over Time

Shares Held

Position Value (USD)

Position in Specialty Chemicals

Basic Materials · as of Jun 30, 2026

GW&K Investment Management, LLC holds $378,359,297 across 18 Specialty Chemicals names. MTX ranks #7 (6.2% of the industry book) .

# Ticker Company Shares Value (USD) Open
7 MTX
Minerals Technologies Inc
This page
317,308 $23,471,272

All Filings in MTX

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26 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $23,471,272 317,308
2026-03-31 $22,814,041 321,687
2025-12-31 $19,964,171 327,550
2025-09-30 $28,210,928 454,136
2025-06-30 $25,725,564 467,143
2025-03-31 $25,810,372 406,015
2024-12-31 $31,978,705 419,613
2024-09-30 $33,216,776 430,102
2024-06-30 $37,390,898 449,626
2024-03-31 $42,682,480 566,983
2023-12-31 $41,269,306 578,731
2023-09-30 $33,855,589 618,254
2023-06-30 $35,252,396 611,066
2023-03-31 $37,323,911 617,741
2022-12-31 $37,062,637 610,386
2022-09-30 $30,809,061 623,539
2022-06-30 $41,536,319 677,149
2022-03-31 $42,779,270 646,701
2021-12-31 $47,639,521 651,258
2021-09-30 $35,158,712 503,418
2021-06-30 $40,545,258 515,384
2021-03-31 $37,720,933 500,809
2020-12-31 $31,503,785 507,144
2020-09-30 $10,874,947 212,817
2020-06-30 $219,163 4,670
2020-03-31 $170,603 4,705