Marten Transport LTD: which funds bought and sold

Institutions that bought and sold Marten Transport shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 116 institutions that filed 13F reports for both quarters added to or opened positions in Marten Transport, and 104 cut or closed them. Together they added a net 3.0M shares, +5.2% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 773K shares (+5.7%); index fund managers were net buyers of 594K shares (+3.0%). 37 opened a new position and 31 sold out entirely.

Bought, Q2 2026 116 institutions, 37 of them new holders Sold, Q2 2026 104 institutions, 31 of them sold out

Net change, all compared +3.0M shares (+5.2%)

Net change, active managers +773K shares (+5.7%), 13 bought, 23 sold

Buyers versus sellers

institutions compared, 255

116 bought 35 104 sold

Active managers and hedge funds 13 bought · 23 sold · +773K

Index fund managers 7 bought · 3 sold · +594K

Other institutions 96 bought · 78 sold · +1.6M

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Cramer Rosenthal Mcglynn LLC	+1.5M New position	1.5M	$26.4M
Goldman Sachs Group Inc	+1.5M +238.9%	2.1M	$36.5M
Nuveen, LLC	+1.3M +198.6%	1.9M	$33.7M
FMR LLC Active manager	+933K +52.8%	2.7M	$46.9M
Bessemer Group Inc	+873K +507759.9%	874K	$15.2M
12Th Street Asset Management Company, LLC	+759K New position	759K	$13.2M
Royce & Associates LP Active manager	+415K +42.3%	1.4M	$24.2M
Two Sigma Investments, LP Hedge fund	+401K +28.1%	1.8M	$31.8M
Mackenzie Financial Corp	+313K New position	313K	$5.4M
Blackrock, Inc. Index funds	+299K +3.1%	10.1M	$175M
Next Century Growth Investors LLC	+281K +67.1%	699K	$12.1M
Polar Asset Management Partners Inc.	+256K New position	256K	$4.4M
Arrowstreet Capital, Limited Partnership Hedge fund	+243K +35.9%	920K	$16M
Aptus Capital Advisors, LLC	+204K New position	204K	$3.5M
American Century Companies Inc Active manager	+181K +6.9%	2.8M	$48.6M
UBS Group AG	+130K +107.9%	251K	$4.4M
State Street Corp Index funds	+126K +4.9%	2.7M	$47.3M
Ameriprise Financial Inc	+112K +11.5%	1.1M	$18.8M
Dimensional Fund Advisors LP	+106K +2.2%	5.0M	$86.7M
Campbell & Co Investment Adviser LLC	+105K +671.4%	121K	$2.1M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
FMR LLC Active manager	+933K +52.8%	2.7M	$46.9M
Royce & Associates LP Active manager	+415K +42.3%	1.4M	$24.2M
Two Sigma Investments, LP Hedge fund	+401K +28.1%	1.8M	$31.8M
Arrowstreet Capital, Limited Partnership Hedge fund	+243K +35.9%	920K	$16M
American Century Companies Inc Active manager	+181K +6.9%	2.8M	$48.6M
Millennium Management LLC Hedge fund	+55K New position	55K	$961,606
Citadel Advisors LLC Hedge fund	+53K +7.9%	722K	$12.5M
AQR Capital Management LLC Hedge fund	+49K +14.3%	395K	$6.9M
Graham Capital Management, L.P. Hedge fund	+25K New position	25K	$433,924
Caxton Associates LLP Hedge fund	+13K New position	13K	$230,876

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Nuance Investments, LLC	−4.3M −88.6%	547K	$9.5M
Boston Partners Active manager	−651K −38.3%	1.0M	$18.2M
4D Advisors, LLC	−350K Sold out	0	—
First Trust Advisors LP	−294K −96.7%	10K	$173,641
Alliancebernstein L.P. Active manager	−293K −81.9%	65K	$850,601
Teacher Retirement System Of Texas	−184K −33.6%	363K	$6.3M
Mariner, LLC	−179K −62.4%	107K	$1.9M
Russell Investments Group, Ltd.	−175K −15.9%	922K	$16M
Jpmorgan Chase & Co	−165K −21.4%	604K	$10.6M
Voloridge Investment Management, LLC Hedge fund	−160K Sold out	0	—
HRT Financial LP	−143K Sold out	0	—
Raymond James Financial Inc	−108K −84.3%	20K	$349,273
Sei Investments Co	−100K −45.3%	121K	$2.1M
Hudson Bay Capital Management LP Hedge fund	−96K −47.4%	107K	$1.9M
Numerai Gp LLC	−89K Sold out	0	—
Nicholas Company, Inc.	−82K −20.6%	315K	$5.5M
Charles Schwab Investment Management Inc Index funds	−76K −6.0%	1.2M	$20.8M
Bank Of America Corp	−71K −12.8%	486K	$8.4M
Us Bancorp	−68K −25.4%	201K	$3.5M
Trexquant Investment LP Hedge fund	−64K −85.7%	11K	$184,986

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Boston Partners Active manager	−651K −38.3%	1.0M	$18.2M
Alliancebernstein L.P. Active manager	−293K −81.9%	65K	$850,601
Voloridge Investment Management, LLC Hedge fund	−160K Sold out	0	—
Hudson Bay Capital Management LP Hedge fund	−96K −47.4%	107K	$1.9M
Trexquant Investment LP Hedge fund	−64K −85.7%	11K	$184,986
Squarepoint Ops LLC Hedge fund	−44K Sold out	0	—
Voleon Capital Management LP Hedge fund	−42K Sold out	0	—
Point72 Asset Management, L.P. Hedge fund	−36K Sold out	0	—
London Co Of Virginia Active manager	−35K −4.0%	854K	$14.8M
Verition Fund Management LLC Hedge fund	−33K −20.8%	124K	$2.2M

New positions

largest by value

Institution	Shares	Value June 30, 2026
Cramer Rosenthal Mcglynn LLC	1.5M	$26.4M
12Th Street Asset Management Company, LLC	759K	$13.2M
Mackenzie Financial Corp	313K	$5.4M
Polar Asset Management Partners Inc.	256K	$4.4M
Aptus Capital Advisors, LLC	204K	$3.5M
Fulcrum Asset Management LLP	86K	$1.5M
Atria Investments, Inc	77K	$1.3M
Treasurer Of The State Of North Carolina	71K	$1.2M
Millennium Management LLCHedge fund	55K	$961,606
Horizon Investments, LLC	46K	$805,960

Sold out

largest by value

Institution	Shares	Value March 31, 2026
4D Advisors, LLC	350K	$4.6M
Voloridge Investment Management, LLCHedge fund	160K	$2.1M
HRT Financial LP	143K	$1.9M
Numerai Gp LLC	89K	$1.2M
Jane Street Group, LLC	61K	$796,308
Harber Asset Management LLC	45K	$595,340
Squarepoint Ops LLCHedge fund	44K	$584,219
Voleon Capital Management LPHedge fund	42K	$547,258
Point72 Asset Management, L.P.Hedge fund	36K	$469,135
D. E. Shaw & Co., Inc.Hedge fund	32K	$424,388

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 229
Ten largest holders: 54.3%
Index fund managers: 33.5%
Active managers and hedge funds: 23.4%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	13	23	3	9	+773K	+5.7%
Index fund managers	7	3	0	0	+594K	+3.0%
Other institutions	96	78	34	22	+1.6M	+6.7%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Marten Transport.

Only managers that filed a holdings report for both quarters are compared (255 here). 10 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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