Donald G Tyler, a director at $GRF, bought 1,000 shares of the company on 05-11-2026 for an estimated $10,050. This trade was reported by Quiver Quantitative using data from a recent SEC filing. This increased their holdings of this class of stock by approximately 11.2%. Following this trade, they now own 9,945 shares of this class of $GRF stock.
$GRF Insider Trading Activity
$GRF insiders have traded $GRF stock on the open market 12 times in the past 6 months. Of those trades, 12 have been purchases and 0 have been sales.
Here’s a breakdown of recent trading of $GRF stock by insiders over the last 6 months:
- NEAL F. ZALENKO has made 10 purchases buying 7,097 shares for an estimated $75,735 and 0 sales.
- DONALD G TYLER has made 2 purchases buying 2,000 shares for an estimated $19,950 and 0 sales.
To track insider transactions, check out Quiver Quantitative's insider trading dashboard. You can access data on insider stock transactions through the Quiver Quantitative API insider transaction endpoint.
$GRF Hedge Fund Activity
We have seen 7 institutional investors add shares of $GRF stock to their portfolio, and 5 decrease their positions in their most recent quarter.
Here are some of the largest recent moves:
- MATISSE CAPITAL removed 16,262 shares (-100.0%) from their portfolio in Q4 2025, for an estimated $174,003
- OSAIC HOLDINGS, INC. removed 11,571 shares (-36.2%) from their portfolio in Q4 2025, for an estimated $123,809
- SUSQUEHANNA INTERNATIONAL GROUP, LLP removed 3,764 shares (-17.8%) from their portfolio in Q4 2025, for an estimated $40,274
- UBS GROUP AG removed 1,936 shares (-100.0%) from their portfolio in Q4 2025, for an estimated $20,715
- BLUE BELL PRIVATE WEALTH MANAGEMENT, LLC added 1,559 shares (+64.4%) to their portfolio in Q4 2025, for an estimated $16,681
- MARINER, LLC added 1,446 shares (+7.8%) to their portfolio in Q4 2025, for an estimated $15,472
- BEACON INVESTMENT ADVISORY SERVICES, INC. added 1,400 shares (+inf%) to their portfolio in Q1 2026, for an estimated $14,357
To track hedge funds' stock portfolios, check out Quiver Quantitative's institutional holdings dashboard. You can access data on hedge funds moves and 13F filings through the Quiver Quantitative API 13F endpoint.
$GRF Revenue
$GRF had revenues of $5.8M in Q4 2025.
You can track GRF financials on Quiver Quantitative's GRF stock page.
You can access data on GRF stock through the Quiver Quantitative API.
This article is not financial advice. See Quiver Quantitative's disclaimers for more information.
