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ROBERT QUARTERMAIN

CIK 1238270 · CHIEF EXECUTIVE OFFICER · last filed 2026-04-15

ROBERT QUARTERMAIN is a CHIEF EXECUTIVE OFFICER who has filed 32 SEC Form 4 insider transactions across 3 companies since 2007. The most recent filing, for DC, was dated Apr 15, 2026. Across all open-market trades the lifetime net is −$1.2M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $52.0M across reported positions.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure

$52.04M

Companies

3

Total Filings

32

Lifetime Open-Market Net

-$1.21M

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
DC CHIEF EXECUTIVE OFFICER 8,044,812 $6.46 $51.93M $6.9K 3 2026-04-15
Dakota Gold Corp. (DC.WS) Delisted CHIEF EXECUTIVE OFFICER 7,996,675 $3.88 $31.03M -$1.22M 16 2026-03-05
VGZ Director 47,424 $2.33 $110.3K $0 5 2007-08-01

Recent Filings

32 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2026-04-15 DC Notice (144) −13,448 -$74.9K EDGAR
2026-04-15 DC Mixed +34,689 -$75.4K EDGAR
2026-03-05 Dakota Gold Corp. (DC.WS) Delisted Exer (X) −37,702 -$238.3K EDGAR
2026-03-04 DC Notice (144) −37,729 -$238.5K EDGAR
2026-01-30 Dakota Gold Corp. (DC.WS) Delisted Exer (X) +541,133 $1.13M EDGAR
2026-01-23 Dakota Gold Corp. (DC.WS) Delisted Sell (S) −250,000 -$1.72M EDGAR
2026-01-22 DC Notice (144) −250,000 -$1.75M EDGAR
2025-09-03 Dakota Gold Corp. (DC.WS) Delisted Grant (A) — $0 EDGAR
2025-04-04 Dakota Gold Corp. (DC.WS) Delisted Buy (P) +65,000 $168.0K EDGAR
2025-03-05 Dakota Gold Corp. (DC.WS) Delisted Mixed +60,370 -$67.1K EDGAR
Showing 1–10 of 32
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Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.