Insider · CIK 0001322402
Mark D Klein
Files at NSLR (SURO CAPITAL CORP.). First filing Nov 17, 2023, latest Sep 22, 2026.
In brief
Mark D Klein files SEC Form 4 as CEO, president, chair and director at NSLR (SURO CAPITAL CORP.). Since Nov 17, 2023, Mark D Klein has reported 11 open-market buys worth $1.4M and 0 open-market sells worth $0, the latest filed on Sep 22, 2026.
A track record needs three past buys with six months of prices behind them; Mark D Klein has 2, so none is measured yet.
The newest scored trade: bought $40k of NSLR on Sep 21, 2026, filed Sep 22, 2026, scored 26 (weak). In the last 12 months: 3 buys worth $355k and 0 sells worth $0.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
NSLR: SURO CAPITAL CORP.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 26Weak | NSLRbuy SURO CAPITAL CORP. | $40k 5,000 shares | +0% | - | |
| 46Moderate | NSLRbuy SURO CAPITAL CORP. | $250k 26,040 shares | +2% | +26% from low-31% from high | |
| 28Weak | NSLRbuy SURO CAPITAL CORP. | $66k 5,000 shares | +0% | +210% from low-2% from high | |
| 30Weak | NSLRbuy SURO CAPITAL CORP. | $124k 14,571 shares | +1% | +129% from low-3% from high | |
| 38Weak | NSLRbuy SURO CAPITAL CORP. | $87k 16,500 shares | +1% | +38% from low-21% from high | |
| 33Weak | SURO CAPITAL CORP. | $4,079 743 shares | +0% | - | |
| 52Moderate | SURO CAPITAL CORP. | $418k 81,257 shares | +7% | - | |
| 45Moderate | SURO CAPITAL CORP. | $61k 14,815 shares | +1% | +38% from low-13% from high | |
| 50Moderate | SURO CAPITAL CORP. | $200k 49,885 shares | +5% | +37% from low-14% from high | |
| 53Moderate | SURO CAPITAL CORP. | $161k 40,300 shares | +4% | +34% from low-16% from high | |
| 26Weak | NSLRbuy SURO CAPITAL CORP. | $35k 9,000 shares | +1% | +35% from low-14% from high |
Transactions
Every row this insider has filed, 33 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 21, 2026 | NSLR SURO CAPITAL CORP. | POpen-market purchase Common Stock | +5,000 | $7.91 | $40k | 1,763,796 | 22 d ago |
| Aug 10, 2026 | NSLR SURO CAPITAL CORP. | POpen-market purchase Common Stock | +26,040 | $9.60 | $250k | 1,758,796 | Aug 10, 2026 |
| Jun 12, 2026 | NSLR SURO CAPITAL CORP. | AGrant or award Common Stock | +350,000 | $0.00 | $0 | 2,026,021 | Jun 16, 2026 |
| Jun 15, 2026 | NSLR SURO CAPITAL CORP. | FTax withholding Common Stock | -293,265 | $13.56 | $4.0M | 1,732,756 | Jun 16, 2026 |
| Apr 21, 2026 | NSLR SURO CAPITAL CORP. | POpen-market purchase Common Stock | +2,500 | $13.08 | $33k | 1,673,521 | Apr 22, 2026 |
| Apr 22, 2026 | NSLR SURO CAPITAL CORP. | POpen-market purchase Common Stock | +2,500 | $13.25 | $33k | 1,676,021 | Apr 22, 2026 |
| Dec 10, 2025 | NSLR SURO CAPITAL CORP. | FTax withholding Common Stock | -17,017 | $9.59 | $163k | 1,688,038 | Dec 16, 2025 |
| Dec 15, 2025 | NSLR SURO CAPITAL CORP. | FTax withholding Common Stock | -17,017 | $9.24 | $157k | 1,671,021 | Dec 16, 2025 |
| Nov 21, 2025 | NSLR SURO CAPITAL CORP. | AGrant or award Common Stock | +174,465 | $0.00 | $0 | 1,705,055 | Nov 25, 2025 |
| Aug 11, 2025 | NSLR SURO CAPITAL CORP. | POpen-market purchase Common Stock | +4,571 | $8.69 | $40k | 1,520,590 | Aug 12, 2025 |
| Aug 12, 2025 | NSLR SURO CAPITAL CORP. | POpen-market purchase Common Stock | +10,000 | $8.45 | $85k | 1,530,590 | Aug 12, 2025 |
| May 16, 2025 | NSLR SURO CAPITAL CORP. | AGrant or award Common Stock | +300,000 | $0.00 | $0 | 1,516,019 | May 19, 2025 |
| May 9, 2025 | NSLR SURO CAPITAL CORP. | POpen-market purchase Common Stock | +16,500 | $5.26 | $87k | 1,216,019 | May 9, 2025 |
| Feb 10, 2025 | NSLR SURO CAPITAL CORP. | FTax withholding Common Stock | -32,858 | $6.17 | $203k | 1,199,519 | Feb 12, 2025 |
| Dec 16, 2024 | NSLR SURO CAPITAL CORP. | FTax withholding Common Stock | -17,017 | $6.02 | $102k | 1,232,377 | Dec 18, 2024 |
| Dec 10, 2024 | NSLR SURO CAPITAL CORP. | AGrant or award Common Stock | +100,000 | $0.00 | $0 | 1,270,666 | Dec 12, 2024 |
| Dec 10, 2024 | NSLR SURO CAPITAL CORP. | FTax withholding Common Stock | -21,272 | $6.14 | $131k | 1,249,394 | Dec 12, 2024 |
| Dec 2, 2024 | NSLR SURO CAPITAL CORP. | POpen-market purchase Common Stock | +743 | $5.49 | $4,079 | 1,170,666 | Dec 4, 2024 |
| Nov 26, 2024 | NSLR SURO CAPITAL CORP. | POpen-market purchase Common Stock | +10,000 | $5.03 | $50k | 1,098,666 | Nov 29, 2024 |
| Nov 27, 2024 | NSLR SURO CAPITAL CORP. | POpen-market purchase Common Stock | +32,257 | $5.10 | $165k | 1,130,923 | Nov 29, 2024 |
| Nov 29, 2024 | NSLR SURO CAPITAL CORP. | POpen-market purchase Common Stock | +39,000 | $5.20 | $203k | 1,169,923 | Nov 29, 2024 |
| Feb 9, 2024 | NSLR SURO CAPITAL CORP. | FTax withholding Common Stock | -32,285 | $3.39 | $109k | 1,117,939 | Feb 13, 2024 |
| Feb 12, 2024 | NSLR SURO CAPITAL CORP. | FTax withholding Common Stock | -41,273 | $3.54 | $146k | 1,076,666 | Feb 13, 2024 |
| Dec 15, 2023 | NSLR SURO CAPITAL CORP. | AGrant or award Common Stock | -100,000 | $0.00 | $0 | 1,150,224 | Dec 15, 2023 |
| Dec 11, 2023 | NSLR SURO CAPITAL CORP. | FTax withholding Common Stock | -21,272 | $4.27 | $91k | 1,050,224 | Dec 13, 2023 |
| Dec 6, 2023 | NSLR SURO CAPITAL CORP. | POpen-market purchase Common Stock | +14,815 | $4.11 | $61k | 1,071,496 | Dec 6, 2023 |
| Dec 1, 2023 | NSLR SURO CAPITAL CORP. | POpen-market purchase Common Stock | +11,885 | $4.00 | $48k | 1,018,681 | Dec 5, 2023 |
| Dec 4, 2023 | NSLR SURO CAPITAL CORP. | POpen-market purchase Common Stock | +19,000 | $4.03 | $77k | 1,037,681 | Dec 5, 2023 |
| Dec 5, 2023 | NSLR SURO CAPITAL CORP. | POpen-market purchase Common Stock | +19,000 | $4.02 | $76k | 1,056,681 | Dec 5, 2023 |
| Nov 28, 2023 | NSLR SURO CAPITAL CORP. | POpen-market purchase Common Stock | +2,400 | $3.96 | $9,504 | 968,896 | Nov 30, 2023 |
| Nov 29, 2023 | NSLR SURO CAPITAL CORP. | POpen-market purchase Common Stock | +19,000 | $4.00 | $76k | 987,896 | Nov 30, 2023 |
| Nov 30, 2023 | NSLR SURO CAPITAL CORP. | POpen-market purchase Common Stock | +18,900 | $3.97 | $75k | 1,006,796 | Nov 30, 2023 |
| Nov 17, 2023 | NSLR SURO CAPITAL CORP. | POpen-market purchase Common Stock | +9,000 | $3.90 | $35k | 966,496 | Nov 17, 2023 |
Questions about Mark D Klein
Answered from the filings on this page, as of the latest one.
Is Mark D Klein buying or selling?
In the last 12 months Mark D Klein reported 3 open-market buys worth $355k and 0 open-market sells worth $0 on SEC Form 4; the latest was bought $40k of NSLR on Sep 21, 2026. Grants, option exercises and tax withholding are not counted.
How did Mark D Klein's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Mark D Klein has 2.
Where does Mark D Klein file Form 4?
Mark D Klein has filed Form 4 at NSLR (SURO CAPITAL CORP.) as Chairman, CEO and President. A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.