Insider profile
Mark Manheimer Insider Trading
This page tracks every SEC Form 4 filing since April 2023 by Mark Manheimer, President, CEO and Secretary: 100 transactions in total, including 12 open-market purchases and 0 sales. Each record is parsed directly from the original filing, with amendments reconciled so a corrected filing never double-counts.
- Role
- President, CEO and Secretary · Director
- CIK
- 0001549229
- Companies traded
- 1
- Total filings
- 100
- First filing
- 2023-08-03
- Last filing
- 2026-06-18
Files as Manheimer Mark · SEC EDGAR ↗
Activity summary
The most recent open-market decision was a purchase of 5,000 shares ($96K) on June 18, 2026.
Three year balance
Buy and sell value by quarter, Q3 23 to Q2 26. Mark Manheimer has been a net seller across the period shown.
Bars below the rule are sales, above are purchases. Largest quarter on the chart is $1.3M.
Insider insight
Mark Manheimer trades most actively in NTST, accounting for 10 of the 100 filings on record. The largest single open-market purchase on record is $100K in NTST, filed Sep 2025.
Track record
Most active in
Transaction History
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jun 18, 2026 | Mark Manheimer | NTST | Purchase | 5,000 | $19.19 | $96K |
| Mar 8, 2026 | Mark Manheimer | NTST | Tax Withholding | 1,906 | $20.91 | $40K |
| Mar 8, 2026 | Mark Manheimer | NTST | Option Exercise | 4,842 | — | — |
| Mar 8, 2026 | Mark Manheimer | NTST | Option Exercise | 4,842 | — | — |
| Feb 28, 2026 | Mark Manheimer | NTST | Option Exercise | 7,093 | — | — |
45 more transactions hidden
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-H "X-Api-Key: $KEY"Companies traded
By number of filings.
Based on the last 50 filings on file — this insider has a longer history.
Filing cadence
Filings per quarter, this window.
Busiest: Q1 26 (27 filings)
Quietest: Q2 25 (0 filings)
Based on the last 50 filings on file — this insider has a longer history.
Reading an insider's Form 4 history
Corporate insiders — directors, officers, and holders of more than 10% of a company's stock — must report their trades to the SEC on Form 4 within two business days. Looking at one insider's filings over time shows whether they tend to buy on the open market (a discretionary use of their own money, generally the strongest signal), sell, or simply receive and exercise equity awards as compensation.
The track record above measures how this insider's past open-market purchases performed in the months after each filing. Trades made under a pre-scheduled Rule 10b5-1 plan are flagged because they carry no timing signal. To pull any insider's full history programmatically, see the insider trading API or our guide to reading Form 4 filings.