MTRN Materion Corporation

NYSE
$240.22

Materion Corporation (MTRN) Hedge Fund Activity

This view isolates hedge funds from the broader institutional ownership shown on the Institutional tab. A pension fund tracking an index may have no view on a stock; when a hedge fund builds or exits a position, that decision can carry information. This page measures those changes. Positions as of June 30, 2026.

Based on quarterly 13F long-equity filings. Changes compare reported quarter-end positions; filings can be reported up to 45 days later and do not represent a fund's complete exposure.

Hedge fund breadth
+5.26
10 buyers / 9 sellers
MIXED
Funds compared
20
funds with comparable MTRN positions
14 current holders · 15 prior-quarter holders
Net share change
+197.5K
+287.0K added, -89.5K cut
Position activity
5 new 5 increased 3 reduced 6 exited

Most significant moves

Ranked by conviction, not size — how much of the fund's own book the position represents, how far it moved, and what kind of fund made it.

Fund Action Shares changed Change Est. value Portfolio wt. Score
Samlyn Capital Long/Short New +151.7K — $45.1M 0.7% 65
Hawk Ridge Capital Management Long/Short New +45.8K — $13.6M 0.4% 61
Qube Research & Technologies Ltd Quant Sold Out -65.5K -100.0% $19.5M 0.0% 59
TWO SIGMA INVESTMENTS, LP Quant Sold Out -6.0K -100.0% $1.8M 0.0% 59
Holocene Advisors, LP Sold Out -7.7K -100.0% $2.3M 0.0% 58
Portolan Capital Management Long/Short New +20.9K — $6.2M 0.2% 55
Capstone Investment Advisors Quant Macro Sold Out -2.2K -100.0% $644.4K 0.0% 53
Quadrature Capital Quant Sold Out -3.1K -100.0% $915.4K 0.0% 53
Boothbay Fund Management New +9.3K — $2.8M 0.1% 51
Aquatic Capital Management Quant Sold Out -1.4K -100.0% $429.1K 0.0% 48

Most significant buyers

By move score, not size.

  • Samlyn Capital New · +151.7K
  • Hawk Ridge Capital Management New · +45.8K
  • Portolan Capital Management New · +20.9K
  • Boothbay Fund Management New · +9.3K
  • Engineers Gate New · +1.1K

Most significant sellers

By move score, not size.

  • Qube Research & Technologies Ltd Sold Out · -65.5K
  • TWO SIGMA INVESTMENTS, LP Sold Out · -6.0K
  • Holocene Advisors, LP Sold Out · -7.7K
  • Capstone Investment Advisors Sold Out · -2.2K
  • Quadrature Capital Sold Out · -3.1K

Hedge fund positions

Fund Tier Shares Previous Change Change % Portfolio wt. Action Score
Samlyn Capital 2 151.7K 0 +151.7K — 0.7% New 65
Hawk Ridge Capital Management 2 45.8K 0 +45.8K — 0.4% New 61
Qube Research & Technologies Ltd 2 0 65.5K -65.5K -100.0% 0.0% Sold Out 59
TWO SIGMA INVESTMENTS, LP 2 0 6.0K -6.0K -100.0% 0.0% Sold Out 59
Holocene Advisors, LP 2 0 7.7K -7.7K -100.0% 0.0% Sold Out 58
Portolan Capital Management 3 20.9K 0 +20.9K — 0.2% New 55
Capstone Investment Advisors 3 0 2.2K -2.2K -100.0% 0.0% Sold Out 53
Quadrature Capital 3 0 3.1K -3.1K -100.0% 0.0% Sold Out 53
Boothbay Fund Management 4 9.3K 0 +9.3K — 0.1% New 51
Aquatic Capital Management 4 0 1.4K -1.4K -100.0% 0.0% Sold Out 48
Engineers Gate 4 1.1K 0 +1.1K — 0.0% New 48
CITADEL ADVISORS LLC 1 64.8K 38.1K +26.7K +70.1% 0.0% Increased 46
Brevan Howard Capital Management 3 7.3K 1.6K +5.7K +360.7% 0.0% Increased 46
AQR Capital Management 3 69.8K 44.9K +24.9K +55.5% 0.0% Increased 36
Bridgewater Associates 1 3.2K 3.7K -449 -12.3% 0.0% Reduced 33
Caxton Associates 3 1.8K 2.7K -933 -34.1% 0.0% Reduced 30
MILLENNIUM MANAGEMENT LLC 2 12.2K 14.5K -2.3K -15.8% 0.0% Reduced 30
Man Group 3 5.4K 4.5K +908 +20.1% 0.0% Increased 26
Gotham Asset Management, LLC 2 2.8K 2.8K +13 +0.5% 0.0% Increased 24
D. E. Shaw & Co., Inc. 1 8.2K 8.2K 0 +0.0% 0.0% Unchanged 22

Every fund above opens. Subscribers can see any manager's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.

Sign in or subscribe

Hedge funds are identified from their 13F filings, which are due 45 days after quarter end and cover long U.S.-listed equity positions only. A fund's short book never appears, so a reduced position can mean a changed view or a changed hedge — the filing doesn't say which.