NASDAQ:VERX

Vertex Stock Insider Trading

Technology > Software - Application

Buy VERX

*Your capital is at risk

$12.91

+0.310 (+2.46%)

At Close: Jul 31, 2026

Vertex Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be negative at -24.94. In total, the insiders bought 8.92M and sold 4.7M VERX shares in the last 100 trades. The insider score can be negative despite buy/sell ratio being positive. The score focuses on the quality of the trades.

Insider Power (Last 100 transactions)	-24.94
● Buy	8.92M shares
● Sell	4.7M shares
68% Buy Activity Moderate Negative Correlation
Buy Signal Low Confidence Jul 27, 2026 Analysis Breakdown: Signal is highly questionable due to a strongly contradictory negative Insider Power Score of -24.94. Confidence increased due to high data reliability score of 100.

Historical Insider Trades

Date	Type	Person	Role	Amount
Jun 16, 2025 Sell	Class A Common Stock S-Sale	Item Second Irr. Trust Fbo Anne Marie Westphal U/a Of Jeffrey R. Westphal Dated October 5, 2001 13(d) Group Member	10% Owner	78 248 Value: $2.88M
Jun 11, 2025 Buy	Class A Common Stock A-Award	Gayton Bradley M Director	Director	5 327 Value: $200.0K
Jun 11, 2025 Buy	Class A Common Stock A-Award	Stamm John Richard Director	Director	5 327 Value: $200.0K
Jun 11, 2025 Buy	Class A Common Stock A-Award	Radcliffe Amanda Westphal	Director	5 327 Value: $200.0K
Jun 11, 2025 Buy	Class A Common Stock A-Award	Thompson Stefanie Westphal	Director	5 327 Value: $200.0K
Jun 11, 2025 Buy	Class A Common Stock A-Award	Saunders Philip Seth Director	Director	5 327 Value: $200.0K
Jun 11, 2025 Buy	Class A Common Stock A-Award	Andersen Eric C. Director	Director	5 327 Value: $200.0K
Jun 11, 2025 Buy	Class A Common Stock A-Award	Mendola Mark J Director	Director	5 327 Value: $200.0K
Jun 11, 2025 Buy	Class A Common Stock A-Award	Mendola Mark J Director	Director	5 327 Value: $200.0K
Jun 11, 2025 Buy	Class A Common Stock A-Award	Andersen Eric C. Director	Director	5 327 Value: $200.0K
Jun 11, 2025 Buy	Class A Common Stock A-Award	Saunders Philip Seth Director	Director	5 327 Value: $200.0K
Jun 11, 2025 Buy	Class A Common Stock A-Award	Thompson Stefanie Westphal	Director	5 327 Value: $200.0K
Jun 11, 2025 Buy	Class A Common Stock A-Award	Radcliffe Amanda Westphal	Director	5 327 Value: $200.0K
Jun 11, 2025 Buy	Class A Common Stock A-Award	Stamm John Richard Director	Director	5 327 Value: $200.0K
Jun 11, 2025 Buy	Class A Common Stock A-Award	Gayton Bradley M Director	Director	5 327 Value: $200.0K
Jun 11, 2025 Buy	Common Stock J-Other	Mendola Mark J Insider	Other	0 Value: $0
Jun 09, 2025 Buy	Class A Common Stock C-Conversion	Westphal Jeffrey See Remarks	Other	1 514 000 Value: $61.6M
Jun 09, 2025 Buy	Class A Common Stock C-Conversion	Westphal Jeffrey See Remarks	Other	1 153 756 Value: $46.9M
Jun 09, 2025 Sell	Class B Common Stock C-Conversion	Westphal Jeffrey See Remarks	Other	1 514 000 Value: $0
Jun 09, 2025 Sell	Class B Common Stock C-Conversion	Westphal Jeffrey See Remarks	Other	332 244 Value: $0
Jun 09, 2025 Sell	Class A Common Stock S-Sale	Westphal Jeffrey See Remarks	Other	332 244 Value: $12.8M
Jun 09, 2025 Buy	Class A Common Stock C-Conversion	Westphal Jeffrey See Remarks	Other	332 244 Value: $13.5M
Jun 09, 2025 Sell	Class B Common Stock C-Conversion	Westphal Jeffrey See Remarks	Other	1 514 000 Value: $0
Jun 09, 2025 Buy	Class A Common Stock C-Conversion	Westphal Jeffrey See Remarks	Other	1 153 756 Value: $46.9M
Jun 09, 2025 Buy	Class A Common Stock C-Conversion	Westphal Jeffrey See Remarks	Other	1 514 000 Value: $61.6M

About Insider Power

Insider Power is a proprietary algorithm developed by StockInvest.us to evaluate the significance of insider transactions. The calculation considers the size, type, and timing of transactions, as well as the insider’s role within the company.

It is important to note that, in general, there is little to no correlation between insider transactions and short-term stock price movements. In one of our studies, only 0.22%^* of stocks with insider activity showed a measurable correlation — and even then, it was unclear whether the effect was caused by insider actions or simply by the stock’s broader trend.

While our algorithms are designed to highlight potentially meaningful signals, these cannot be regarded as statistically significant on their own. Insider trading activity should therefore be seen as informative rather than as direct trading guidance. The Insider Power metric was created to present this information in a clearer and more accessible way, helping investors better understand the possible context of insider activity.

* October 6th, 2025 - Tested on 5562 stocks

ABOUT VERTEX INC.

Vertex, Inc. provides tax technology solutions for corporations in retail, communication, leasing, and manufacturing industries in the United States and internationally. It offers tax determination, compliance and reporting, tax data management, document management, pre-built integration, and industry-specific solutions. The company sells its software products through software license and software as a service subscriptions. It also provides impl...

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