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Who

Gary A. Kolstad

Director

Company insider

Files Form 4 as: Director, Marine Products; Director, Rpc; President and CEO, Carbo Ceramics.

Every Form 4 they filed

In numbers

Trades disclosed
104
Buys
23
Sells
2
Bought
$1.1M
Sold
$55K
Companies
3
Companies where not an officer
2
First trade
1 Jun 2006
Last trade
15 May 2026
Last filed
19 May 2026

Companies traded

Where they are an officer
Carbo CeramicsDirector, Officer · last 12 Jun 202023 buys · 2 sells
Everywhere else they filed: board seats, 10% stakes, other companies
Marine ProductsDirector · Marine Shipping · last 15 May 20260 buys · 0 sells
RES RpcDirector · Oilfield services · last 8 May 20260 buys · 0 sells

Activity over time

1 Nov 2024 – 1 Oct 2026
101Nov 24May 25Nov 25Apr 26Oct 26

Buys above the line, sells below, each month.

Every trade

TradedCompanyWhatAmount
15 May 2026filed 19 May 2026Marine ProductsMarine ShippingSEC FORM 4 Code J$38K4,651 at $8.18filing
15 May 2026filed 19 May 2026Marine Products GroupSEC FORM 4 Code J$38K4,651 at $8.18filing
8 May 2026filed 12 May 2026RES RpcOilfield servicesSEC FORM 4 Code A—7,352filing
8 May 2026filed 12 May 2026RES RpcOilfield servicesSEC FORM 4 Code A—7,352filing
1 Aug 2025filed 5 Aug 2025Marine ProductsSEC FORM 4 Code A—4,651filing
1 Aug 2025filed 5 Aug 2025RES RpcOilfield servicesSEC FORM 4 Code A—8,814filing
12 Jun 2020filed 6 Jul 2020Carbo CeramicsSEC FORM 4 Sold$1,73586,757 at $0.02filing
1 Feb 2020filed 4 Feb 2020Carbo Ceramicsoption or derivativeSEC FORM 4 Code M—30,906 at $0.00filing
1 Feb 2020filed 4 Feb 2020Carbo Ceramicsoption or derivativeSEC FORM 4 Code M—6,963 at $0.00filing
1 Feb 2020filed 4 Feb 2020Carbo Ceramicsoption or derivativeSEC FORM 4 Code M—12,000 at $0.00filing
1 Feb 2020filed 4 Feb 2020Carbo CeramicsSEC FORM 4 Code F$3,98918,993 at $0.21filing
1 Feb 2020filed 4 Feb 2020Carbo CeramicsSEC FORM 4 Code M—30,906filing
1 Feb 2020filed 4 Feb 2020Carbo CeramicsSEC FORM 4 Code D$6,49030,906 at $0.21filing
1 Feb 2020filed 4 Feb 2020Carbo CeramicsSEC FORM 4 Code M—6,963filing
1 Feb 2020filed 4 Feb 2020Carbo CeramicsSEC FORM 4 Code D$1,4626,963 at $0.21filing
1 Feb 2020filed 4 Feb 2020Carbo CeramicsSEC FORM 4 Code M—12,000filing
1 Feb 2020filed 4 Feb 2020Carbo CeramicsSEC FORM 4 Code D$2,52012,000 at $0.21filing
7 Aug 2019filed 7 Aug 2019Carbo CeramicsSEC FORM 4 Bought$30K25,000 at $1.18filing
30 Jul 2019filed 30 Jul 2019Carbo CeramicsSEC FORM 4 Bought$20K17,650 at $1.12filing
29 Jul 2019filed 30 Jul 2019Carbo CeramicsSEC FORM 4 Bought$33K32,350 at $1.03filing

News

No headline names them, or the companies they trade most, lately.

Sectors

Not placed25

Buys in green, sells in red, by the company’s sector.

Related people

Nobody else traded the same names lately.