MLM Insider Trading Activity

Transactions disclosed by company insiders to the SEC on Form 4, most recent first.

InsiderRoleDateSharesValue
Petro Michael J SVP and CFO 2026-08-03 368 $199,555

How Institutional Funds Moved on MLM

Position changes disclosed in SEC Form 13F filings. These report a quarterly snapshot, not exact trade dates.

FundChangeQuarter
Russell Investments Group, Ltd. Russell Investments Group, Ltd. increased this position by 487811% ($4,709 -> $22,975,728). 2026-06-30
JONES FINANCIAL COMPANIES LLLP JONES FINANCIAL COMPANIES LLLP reduced this position by 56% ($48,249,304 -> $21,051,733). 2026-06-30
AMERIPRISE FINANCIAL INC AMERIPRISE FINANCIAL INC reduced this position by 56% ($41,285,895 -> $18,200,653). 2026-06-30
BAILLIE GIFFORD & CO BAILLIE GIFFORD & CO increased this position by 37% ($48,402,447 -> $66,545,413). 2026-06-30
FRED ALGER MANAGEMENT, LLC FRED ALGER MANAGEMENT, LLC reduced this position by 58% ($30,772,070 -> $12,976,327). 2026-06-30
Clearbridge Investments, LLC Clearbridge Investments, LLC reduced this position by 13% ($126,372,908 -> $110,073,046). 2026-06-30
BNP PARIBAS FINANCIAL MARKETS BNP PARIBAS FINANCIAL MARKETS increased this position by 9% ($48,483,685 -> $52,802,075). 2026-06-30
NEUBERGER BERMAN GROUP LLC NEUBERGER BERMAN GROUP LLC reduced this position by 14% ($30,757,674 -> $26,588,272). 2026-06-30

Which Funds Hold MLM

Largest reported positions as of 2026-06-30.

FundValueShares
GEODE CAPITAL MANAGEMENT, LLC $806,477,894 1,404,830
GARDNER RUSSO & QUINN LLC $406,784,959 705,367
Diamond Hill Capital Management, LLC (Investment Advisor) $123,359,014 213,905
Clearbridge Investments, LLC $110,073,046 190,867
Sumitomo Mitsui Trust Group, Inc. $74,619,213 129,390
BAILLIE GIFFORD & CO $66,545,413 115,390
BNP PARIBAS FINANCIAL MARKETS $52,802,075 91,559
NEUBERGER BERMAN GROUP LLC $26,588,272 46,104
STRS OHIO $25,023,590 43,391
Russell Investments Group, Ltd. $22,975,728 39,840

Data compiled from public SEC filings. This is informational reporting, not investment advice.

McClain Delaney Child’s MLM Stock Buy Coincides With Insider Sale

Martin Marietta Materials stock chart with icons representing a congressional stock purchase and an insider stock sale

A newly filed disclosure shows that a dependent child of Rep. April McClain Delaney purchased shares of Martin Marietta Materials, Inc. (MLM) common stock on July 17, 2026. The transaction, reported in a Periodic Transaction Report required under the STOCK Act, falls in the $1,001 to $15,000 range, the standard bracket used for smaller trades … Read more

McClain Delaney Child Buys MLM Stock Amid Insider Sale

Stock disclosure document showing MLM transaction details alongside a chart of Martin Marietta Materials shares

A new Periodic Transaction Report filed with the U.S. House of Representatives shows that a dependent child of Hon. April McClain Delaney purchased shares of Martin Marietta Materials, Inc. (MLM) common stock on July 20, 2026. The transaction, disclosed under the STOCK Act, falls within the $1,001 to $15,000 range, the lowest reporting bracket used … Read more

McClain Delaney’s Child Buys MLM Stock as Insider Sells

Screenshot-style graphic showing a STOCK Act disclosure for Martin Marietta Materials (MLM) stock purchase by a congressional dependent

A newly filed Periodic Transaction Report shows that a dependent child of Hon. April McClain Delaney, a member of the U.S. House of Representatives, purchased shares of Martin Marietta Materials, Inc. (MLM) common stock on July 24, 2026. The disclosure, submitted under the STOCK Act, lists the transaction value in the $15,001 to $50,000 range. … Read more