Why do insider purchases matter?

Insiders sell for many reasons, but they generally buy for one: they expect the stock to rise. Open-market purchases by officers and directors, especially clusters of several insiders buying at once, are one of the better-studied bullish signals.

Where does this data come from?

From SEC Form 4 filings, which insiders must file within two business days of a trade. Quantisnow parses each filing as EDGAR accepts it and flags open-market purchases.

Top lists · Insiders and filings

Insider purchases: Basic Materials

Quantisnow recorded 36 insider purchases among basic materials stocks in the last 90 days across 16 companies. GSM (Ferroglobe PLC) had the most, with 5, followed by URG (5) and AUGO (4). The busiest day was Nov 12, 2026, with 10.

Open-market Form 4 buys by officers and directors.

Events: 36
Companies: 16
Busiest day: Nov 12; 10 that day
Most frequent: GSM; 5 events

Most frequent tickers

Newest first

01Nov 12
URG
VICE PRESIDENT FINANCE Walle Jade bought $109,999 worth of shares (164,178 units at $0.67), increasing direct ownership by 39% to 588,215 units (SEC Form 4)
02Nov 12
URG
CHIEF FINANCIAL OFFICER Smith Roger L. bought $19,530 worth of shares (30,000 units at $0.65), increasing direct ownership by 5% to 681,562 units (SEC Form 4)
03Nov 12
MP
Chief Operating Officer Rosenthal Michael Stuart bought $1,175,090 worth of shares (32,000 units at $36.72), increasing direct ownership by 2% to 1,365,673 units (SEC Form 4)
04Nov 12
MP
Director Weisenburger Randall J bought $1,980,000 worth of shares (55,000 units at $36.00), increasing direct ownership by 36% to 205,899 units (SEC Form 4)
05Nov 12
MP
Chief Financial Officer Corbett Ryan bought $198,516 worth of shares (5,476 units at $36.25), increasing direct ownership by 5% to 114,493 units (SEC Form 4)
06Nov 12
GSM
Officer Girardeau David Marie, Gabriel bought $40,610 worth of ORDINARY SHARES (15,500 units at $2.62), increasing direct ownership by 28% to 70,664 units (SEC Form 4)
07Nov 12
GSM
Director Crockett Bruce Larmour bought $21,352 worth of ORDINARY SHARES (8,000 units at $2.67), increasing direct ownership by 17% to 54,000 units (SEC Form 4)
08Nov 12
GSM
Director Villar-Mir De Fuentes Silvia bought $75,000 worth of ORDINARY SHARES (28,671 units at $2.62) (SEC Form 4)
09Nov 12
GSM
EXECUTIVE CHAIRMAN Lopez Madrid Javier bought $75,000 worth of ORDINARY SHARES (28,671 units at $2.62), increasing direct ownership by 29% to 128,399 units (SEC Form 4)
10Nov 12
GSM
CHIEF EXECUTIVE OFFICER Levi Marco bought $50,600 worth of ORDINARY SHARES (20,000 units at $2.53), increasing direct ownership by 2% to 943,818 units (SEC Form 4)
11Nov 10
TROX
Director Johnston Peter bought $52,600 worth of shares (20,000 units at $2.63), increasing direct ownership by 10% to 224,461 units (SEC Form 4)
12Oct 30
VALE
Accounting Officer De Souza Funo Elaine Maria bought $3,094 worth of shares (247 units at $12.53) (SEC Form 4)
13Oct 28
NVA
Director Girnun Joshua I. bought $20,001 worth of shares (6,780 units at $2.95) (SEC Form 4)
14Oct 28
THM
Chief Executive Officer Wiens David Victor bought $5,850 worth of shares (3,000 units at $1.95) (SEC Form 4)
15Oct 28
HYMC
Director Rhodes Blake bought $50,075 worth of shares (3,000 units at $16.69) (SEC Form 4)
16Oct 26
LXU
Director Ackerman Jonathan Z. bought $10,170 worth of shares (1,000 units at $10.17) (SEC Form 4)
17Oct 23
CLF
Director Camara Edilson bought $99,826 worth of shares (7,400 units at $13.49) (SEC Form 4)
18Oct 20
NVA
Chief Executive Officer Gerteisen Christopher bought $21,933 worth of shares (6,737 units at $3.26) (SEC Form 4)
19Oct 20
NVA
Director Geller Avi bought $5,000 worth of shares (1,600 units at $3.13) (SEC Form 4)
20Sep 25
URG
VICE PRESIDENT FINANCE Walle Jade bought $110,071 worth of shares (96,556 units at $1.14), increasing direct ownership by 29% to 424,037 units (SEC Form 4)
21Sep 22
EU
Chief Executive Officer Little Richard H bought $10,600 worth of shares (10,000 units at $1.06), increasing direct ownership by 20% to 60,000 units (SEC Form 4)
22Sep 21
EU
Executive Chairman Sheriff William M bought $101,250 worth of shares (125,000 units at $0.81), increasing direct ownership by 6% to 1,662,169 units (SEC Form 4)
23Sep 18
THM
Chief Executive Officer Wiens David Victor bought $200,000 worth of shares (83,682 units at $2.39), increasing direct ownership by 14% to 684,047 units (SEC Form 4)
24Sep 17
LXU
Director Ackerman Jonathan Z. bought $11,300 worth of shares (1,000 units at $11.30), increasing direct ownership by 10% to 11,252 units (SEC Form 4)
25Sep 16
EU
Executive Chairman Sheriff William M bought $150,250 worth of shares (175,000 units at $0.86), increasing direct ownership by 11% to 1,562,169 units (SEC Form 4)
26Sep 15
URG
VICE PRESIDENT FINANCE Walle Jade bought $97,499 worth of shares (75,581 units at $1.29), increasing direct ownership by 30% to 327,481 units (SEC Form 4)
27Sep 3
AUGO
Director Sousa Mauad Bruno bought $81 worth of shares (1 units at $81.10) and converted options into 8,066 shares (SEC Form 4)
28Sep 3
AUGO
Director Sousa Mauad Bruno bought $799 worth of shares (10 units at $79.89), sold $10,353,000 worth of shares (127,500 units at $81.20) and converted options into 7,225 shares (SEC Form 4)
29Sep 1
AUGO
Director Sousa Mauad Bruno bought $21,792,751 worth of shares (252,000 units at $86.48), sold $13,660,267 worth of shares (157,500 units at $86.73) and converted options into 31,000 shares (SEC Form 4)
30Aug 31
JAGU
President, CEO, and Director Gold Steven Brian bought $19,200 worth of shares (12,000 units at $1.60) (SEC Form 4)
31Aug 25
URG
GENERAL COUNSEL/CORP SECRETARY Ritchie David A. bought $14,200 worth of shares (10,000 units at $1.42) (SEC Form 4)
32Aug 21
IAUX
EVP, General Counsel Savarie David Roger bought $7,274 worth of shares (4,575 units at $1.59), increasing direct ownership by 2% to 274,275 units (SEC Form 4)
33Aug 20
IAUX
President and CEO Young Richard Scott bought $1,620,000 worth of shares (1,000,000 units at $1.62), increasing direct ownership by 20% to 5,971,000 units (SEC Form 4)
34Aug 19
LIN
Director Reynolds Paula Rosput bought $47,912 worth of Ordinary Shares (100 units at $479.12), increasing direct ownership by 14% to 816 units (SEC Form 4)
35Aug 18
AUGO
Director Sousa Mauad Bruno bought $868,230 worth of shares (11,000 units at $78.93) (SEC Form 4)
36Aug 17
CMCL
Director Ndlovu July bought $492,842 worth of shares (21,400 units at $23.03), increasing direct ownership by 9% to 250,489 units (SEC Form 4)

Year in review

Monthly archive

By sector (last 90 days)

Questions

How many insider purchases were there among basic materials stocks in the last 90 days?: Quantisnow recorded 36 insider purchases among basic materials stocks in the last 90 days across 16 companies. GSM (Ferroglobe PLC) had the most, with 5, followed by URG (5) and AUGO (4). The busiest day was Nov 12, 2026, with 10.
Why do insider purchases matter?: Insiders sell for many reasons, but they generally buy for one: they expect the stock to rise. Open-market purchases by officers and directors, especially clusters of several insiders buying at once, are one of the better-studied bullish signals.
Where does this data come from?: From SEC Form 4 filings, which insiders must file within two business days of a trade. Quantisnow parses each filing as EDGAR accepts it and flags open-market purchases.