Portolan Capital Management’s Materion MTRN Stock Holding History

Portolan Capital Management’s Portfolio MTRN Stock Details MTRN Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$6.2M	Buy	+20,860	New	+$4.37M	0.23%	104
2023 Q3	–	Sell	-48,707	Closed	-$5.56M	–	138
2023 Q2	$5.56M	Buy	48,707 +23,659	+94%	+$2.57M	0.49%	62
2023 Q1	$2.91M	Buy	+25,048	New	+$2.51M	0.28%	106
2022 Q3	–	Sell	-44,614	Closed	-$3.29M	–	142
2022 Q2	$3.29M	Buy	44,614 +5,692	+15%	+$457K	0.33%	94
2022 Q1	$3.34M	Buy	+38,922	New	+$3.33M	0.27%	103
2021 Q2	–	Sell	-94,866	Closed	-$6.28M	–	145
2021 Q1	$6.28M	Buy	+94,866	New	+$6.58M	0.49%	90
2015 Q3	–	Sell	-36,359	Closed	-$1.28M	–	127
2015 Q2	$1.28M	Sell	36,359 -52,918	-59%	-$2.04M	0.18%	114
2015 Q1	$3.43M	Buy	+89,277	New	+$3.21M	0.63%	61

Other funds holding MTRN

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Capital Research Global Investors Los Angeles, California $717B AUM 35.42% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Fisher Asset Management Camas, Washington $336B AUM 34.66% 1-Year Est. Return

Barrow, Hanley, Mewhinney & Strauss Dallas, Texas $33B AUM 40.62% 1-Year Est. Return

Portolan Capital Management's MTRN Position: Q2 2026 in Review

Portolan Capital Management opened a new position in Materion (MTRN) in Q2 2026: 20,860 shares worth $6.2M. The stake represents 0.23% of the portfolio and ranks #104 among its holdings. This is a return to the name: Portolan Capital Management previously reported a position in MTRN as recently as Q2 2023.

Portolan Capital Management first reported a position in MTRN in Q1 2015 and has held it in 8 quarters since. The position peaked at $6.28M in Q1 2021. 405 funds tracked by Wall St. Rank hold MTRN as of Q2 2026.

Portolan Capital Management held 20,860 shares of Materion worth $6.2M as of Q2 2026.
Materion was a new Portolan Capital Management position in Q2 2026.
Materion made up 0.23% of Portolan Capital Management's portfolio in Q2 2026, its #104 holding.
Portolan Capital Management first reported a position in Materion in Q1 2015 and has held it in 8 quarters since.
Portolan Capital Management's Materion position peaked at $6.28M in Q1 2021.
405 funds tracked by Wall St. Rank held Materion as of Q2 2026.

Based on Portolan Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.