Quick Takeaways
- GSE SYSTEMS INC has 12 insiders with reported activity on this page.
- No net insider buy/sell flow is currently reported for the last year.
- Recent transaction rows are not currently available.
Insider Transactions Reported by 12 Insiders of GSE SYSTEMS INC
- Location
- Columbia, MD
What Changed
- No meaningful buy/sell imbalance is currently visible in the one-year window.
- Activity will update as new Forms 3/4/5 are filed.
Why This Matters
- This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
- Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.
Source Evidence
Filed on Form 4
See Original Filing
Issuer insider activity is sourced from SEC Forms 3, 4, and 5.
Insider trading overview
Last 12 monthsInsider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 28 Apr 2025.
Buys
$0
Shares: 0
Insiders: 0
Sells
$0
Shares: 0
Insiders: 0
Net
$0
Shares: 0
Insiders: 0
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
GSE SYSTEMS INC executives and other stock owners filed with the SEC include:
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| NGP Energy Technology Partners II, L.P. | 10%+ Owner | $3,770,314 | Mixed | 17 Mar 2023 | ||
| O'Connor Kathryn | Director | $558,390 | Mixed | 12 Jun 2023 | ||
| William S. Corey Jr. | Director | $531,074 | Mixed | 12 Jun 2023 | ||
| Loudermilk Kyle Justin | President & CEO, Director | $430,473 | Mixed | 31 Mar 2024 | ||
| Suresh Sundaram | Director | $412,225 | Mixed | 14 Jun 2022 | ||
| Dougherty III Thomas James | Director | $394,456 | Mixed | 12 Jun 2023 | ||
| Pugh Daniel Warren | Chief Legal and Risk Officer | $248,922 | Mixed | 05 Apr 2023 | ||
| Pepe Emmett Anthony | Chief Financial Officer | $173,130 | Mixed | 30 Sep 2024 | ||
| Donald Horn | President, GSE Engineering | $127,852 | Mixed | 31 Mar 2023 | ||
| Meyssami Bahram | Chief Technology Officer | $94,151 | Mixed | 30 Sep 2024 | ||
| Khanna Ravi | President & CEO, Director | $46,370 | Mixed | 30 Sep 2024 | ||
| Greene Brian | VP, GSE Workforce Solutions | $15,173 | Mixed | 30 Sep 2024 |
Top shareholders of GSE SYSTEMS INC (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| NGP Energy Technology Partners II, L.P. |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
1,875,778
|
$3,770,314 | — | 17 Mar 2023 | |
| O'Connor Kathryn |
3/4/5
|
Director |
—
class O/S missing
|
277,806
|
$558,390 | — | 12 Jun 2023 | |
| William S. Corey Jr. |
3/4/5
|
Director |
—
class O/S missing
|
264,216
|
$531,074 | — | 12 Jun 2023 | |
| Loudermilk Kyle Justin |
3/4/5
|
President & CEO, Director |
—
mixed-class rows
|
233,776
mixed-class rows
|
$430,473 | — | 31 Mar 2024 | |
| Suresh Sundaram |
3/4/5
|
Director |
—
class O/S missing
|
205,087
|
$412,225 | — | 14 Jun 2022 | |
| Dougherty III Thomas James |
3/4/5
|
Director |
—
class O/S missing
|
196,247
|
$394,456 | — | 12 Jun 2023 | |
| Pugh Daniel Warren |
3/4/5
|
Chief Legal and Risk Officer |
—
mixed-class rows
|
162,092
mixed-class rows
|
$248,922 | — | 05 Apr 2023 | |
| Pepe Emmett Anthony |
3/4/5
|
Chief Financial Officer |
—
mixed-class rows
|
59,288
mixed-class rows
|
$173,130 | — | 30 Sep 2024 | |
| Donald Horn |
3/4/5
|
President, GSE Engineering |
—
class O/S missing
|
63,608
|
$127,852 | — | 31 Mar 2023 | |
| Meyssami Bahram |
3/4/5
|
Chief Technology Officer |
—
class O/S missing
|
23,133
|
$94,151 | — | 30 Sep 2024 | |
| Khanna Ravi |
3/4/5
|
President & CEO, Director |
—
class O/S missing
|
11,393
|
$46,370 | — | 30 Sep 2024 | |
| Greene Brian |
3/4/5
|
VP, GSE Workforce Solutions |
—
class O/S missing
|
3,728
|
$15,173 | — | 30 Sep 2024 |
Recent Insider Transactions by Companies or Individuals for GSE SYSTEMS INC
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| No insider transactions were found in the last 12 months for this issuer. | ||||||||||
* An asterisk sign (*) next to the price indicates that the price is likely invalid.