Nasdaq · CIK 0001509470
NSLR SURO CAPITAL CORP.
Insider trading from SEC Form 4. Last filing 21 d ago. Close $7.27 on Oct 9, 2026, 0% from the 52-week low and -51% from the high.
In brief
SURO CAPITAL CORP. (NSLR) has 46 SEC Form 4 filings on file from 8 insiders, the latest filed on Sep 22, 2026. In the last 90 days insiders made 3 open-market buys worth $801k and 1 open-market sell worth $51k, net +$750k.
19 open-market trades have been scored at NSLR. The newest: Mark D Klein (Chairman, CEO and President) bought $40k of stock on Sep 21, 2026, filed Sep 22, 2026, scored 26 (weak). The largest of the 19 shown: Erik A Falk (director) bought $511k on Aug 26, 2026, scored 49 (moderate). 2 insiders bought within 14 days of each other around Dec 2, 2024.
5 Form 144 notices of planned sales are on file, the latest filed Sep 3, 2026.
Last 90 days
Price and insider trades, last year
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
Open-market buys and sells at SURO CAPITAL CORP., scored.
| Score | Insider | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 26Weak | Mark D Klein Chairman, CEO and President buy | $40k 5,000 shares | +0% | - | |
| 27Weak | Ronald M. Lott director sell | $51k 5,085 shares | -24% | - | |
| 49Moderate | Erik A Falk director buy | $511k 50,000 shares | - | +22% from low-31% from high | |
| 46Moderate | Mark D Klein Chairman, CEO and President buy | $250k 26,040 shares | +2% | +26% from low-31% from high | |
| 20Weak | Ronald M. Lott director sell | $6,175 500 shares | -14% | +80% from low-16% from high | |
| 46Moderate | Ronald M. Lott director sell | $138k 10,669 shares | -50% | +204% from low-1% from high | |
| 28Weak | Mark D Klein Chairman, CEO and President buy | $66k 5,000 shares | +0% | +210% from low-2% from high | |
| 15Weak | Ronald M. Lott director sell | $2,919 473 shares | -2% | +59% from low-5% from high | |
| 28Weak | Ronald M. Lott director sell | $66k 7,500 shares | -20% | +137% from low0% from high | |
| 30Weak | Mark D Klein Chairman, CEO and President buy | $124k 14,571 shares | +1% | +129% from low-3% from high | |
| 38Weak | Mark D Klein Chairman, CEO and President buy | $87k 16,500 shares | +1% | +38% from low-21% from high | |
| 33Weak | Mark D Klein Chairman, CEO and President buy | $4,079 743 shares | +0% | - | |
| 33Weak | Allison Green See Remarks buy | $50k 9,100 shares | +7% | - | |
| 52Moderate | Mark D Klein Chairman, CEO and President buy | $418k 81,257 shares | +7% | - | |
| 45Moderate | Mark D Klein Chairman, CEO and President buy | $61k 14,815 shares | +1% | +38% from low-13% from high | |
| 33Weak | Allison Green See Remarks buy | $49k 12,050 shares | +11% | +37% from low-13% from high | |
| 50Moderate | Mark D Klein Chairman, CEO and President buy | $200k 49,885 shares | +5% | +37% from low-14% from high | |
| 53Moderate | Mark D Klein Chairman, CEO and President buy | $161k 40,300 shares | +4% | +34% from low-16% from high | |
| 26Weak | Mark D Klein Chairman, CEO and President buy | $35k 9,000 shares | +1% | +35% from low-14% from high |
Planned sales
Form 144 notices filed before a sale of restricted or control stock, newest first. The sale itself usually reaches a Form 4 within days. All planned sales
| Filed | Seller | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Sep 3, 2026 | Ronald Lott Director | 5,085 0.02% of outstanding | $51k | Sep 3, 2026 | $6,146 |
| Jun 23, 2026 | Ronald Lott Director | 500 0.00% of outstanding | $6,230 | Jun 23, 2026 | $138k |
| Apr 28, 2026 | Ronald Lott Director | 10,669 0.04% of outstanding | $142k | Apr 28, 2026 | none |
| Aug 19, 2025 | Ronald Lott Director | 7,500 0.03% of outstanding | $64k | Aug 19, 2025 | none |
| Mar 20, 2025 | Ronald Lott Director | 10,000 0.04% of outstanding | $59k | Mar 20, 2025 | none |
Transactions
The newest 50 of 60 rows filed, every code.
| Date | Insider | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 21, 2026 | Mark D Klein Chairman, CEO and President | POpen-market purchase Common Stock | +5,000 | $7.91 | $40k | 1,763,796 | 21 d ago |
| Sep 3, 2026 | Ronald M. Lott director | SOpen-market sale Common Stockindirect: By Family Trust | -5,085 | $9.96 | $51k | 16,432 | 39 d ago |
| Aug 26, 2026 | Erik A Falk director | POpen-market purchase Common Stockindirect: By revocable trust | +50,000 | $10.22 | $511k | 50,000 | Aug 26, 2026 |
| Aug 10, 2026 | Mark D Klein Chairman, CEO and President | POpen-market purchase Common Stock | +26,040 | $9.60 | $250k | 1,758,796 | Aug 10, 2026 |
| Jun 23, 2026 | Ronald M. Lott director | SOpen-market sale Common Stock | -500 | $12.35 | $6,175 | 3,036 | Jun 25, 2026 |
| Jun 12, 2026 | Mark D Klein Chairman, CEO and President | AGrant or award Common Stock | +350,000 | $0.00 | $0 | 2,026,021 | Jun 16, 2026 |
| Jun 12, 2026 | Allison Green See Remarks | AGrant or award Common Stock | +60,000 | $0.00 | $0 | 249,805 | Jun 16, 2026 |
| Jun 15, 2026 | Allison Green See Remarks | FTax withholding Common Stock | -41,815 | $13.56 | $567k | 207,990 | Jun 16, 2026 |
| Jun 15, 2026 | Mark D Klein Chairman, CEO and President | FTax withholding Common Stock | -293,265 | $13.56 | $4.0M | 1,732,756 | Jun 16, 2026 |
| Jun 10, 2026 | Ronald M. Lott director | AGrant or award Common Stock | +3,536 | $0.00 | $0 | 3,536 | Jun 12, 2026 |
| Jun 10, 2026 | Marc Mazur director | AGrant or award Common Stock | +3,536 | $0.00 | $0 | 68,950 | Jun 12, 2026 |
| Jun 10, 2026 | Leonard Potter director | AGrant or award Common Stock | +3,536 | $0.00 | $0 | 105,815 | Jun 12, 2026 |
| Jun 10, 2026 | Richard C. Szuch director | AGrant or award Common Stock | +3,536 | $0.00 | $0 | 9,303 | Jun 12, 2026 |
| Jun 10, 2026 | Lisa Westley director | AGrant or award Common Stock | +3,536 | $0.00 | $0 | 58,831 | Jun 12, 2026 |
| Apr 28, 2026 | Ronald M. Lott director | SOpen-market sale Common Stockindirect: By Family Trust | -10,669 | $12.90 | $138k | 10,669 | Apr 30, 2026 |
| Apr 21, 2026 | Mark D Klein Chairman, CEO and President | POpen-market purchase Common Stock | +2,500 | $13.08 | $33k | 1,673,521 | Apr 22, 2026 |
| Apr 22, 2026 | Mark D Klein Chairman, CEO and President | POpen-market purchase Common Stock | +2,500 | $13.25 | $33k | 1,676,021 | Apr 22, 2026 |
| Dec 10, 2025 | Allison Green See Remarks | FTax withholding Common Stock | -4,232 | $9.59 | $41k | 194,037 | Dec 16, 2025 |
| Dec 10, 2025 | Mark D Klein Chairman, CEO and President | FTax withholding Common Stock | -17,017 | $9.59 | $163k | 1,688,038 | Dec 16, 2025 |
| Dec 15, 2025 | Allison Green See Remarks | FTax withholding Common Stock | -4,232 | $9.24 | $39k | 189,805 | Dec 16, 2025 |
| Dec 15, 2025 | Mark D Klein Chairman, CEO and President | FTax withholding Common Stock | -17,017 | $9.24 | $157k | 1,671,021 | Dec 16, 2025 |
| Nov 21, 2025 | Allison Green See Remarks | AGrant or award Common Stock | +956 | $0.00 | $0 | 198,269 | Nov 25, 2025 |
| Nov 21, 2025 | Mark D Klein Chairman, CEO and President | AGrant or award Common Stock | +174,465 | $0.00 | $0 | 1,705,055 | Nov 25, 2025 |
| Dec 26, 2024 | Ronald M. Lott director | SOpen-market sale Common Stock | -434 | $6.06 | $2,630 | 29,189 | Oct 28, 2025 |
| Jun 11, 2025 | Ronald M. Lott director | SOpen-market sale Common Stock | -39 | $7.42 | $289 | 29,150 | Oct 28, 2025 |
| Sep 3, 2025 | Richard C. Szuch director | AGrant or award Common Stock | +5,767 | $8.66 | $50k | 5,767 | Sep 5, 2025 |
| Aug 19, 2025 | Ronald M. Lott director | SOpen-market sale Common Stock | -7,500 | $8.81 | $66k | 29,623 | Aug 22, 2025 |
| Aug 11, 2025 | Mark D Klein Chairman, CEO and President | POpen-market purchase Common Stock | +4,571 | $8.69 | $40k | 1,520,590 | Aug 12, 2025 |
| Aug 12, 2025 | Mark D Klein Chairman, CEO and President | POpen-market purchase Common Stock | +10,000 | $8.45 | $85k | 1,530,590 | Aug 12, 2025 |
| May 28, 2025 | Lisa Westley director | AGrant or award Common Stock | +7,812 | $0.00 | $0 | 55,295 | May 30, 2025 |
| May 28, 2025 | Ronald M. Lott director | AGrant or award Common Stock | +7,812 | $0.00 | $0 | 37,123 | May 30, 2025 |
| May 28, 2025 | Marc Mazur director | AGrant or award Common Stock | +7,812 | $0.00 | $0 | 65,414 | May 30, 2025 |
| May 28, 2025 | Leonard Potter director | AGrant or award Common Stock | +7,812 | $0.00 | $0 | 102,279 | May 30, 2025 |
| May 16, 2025 | Allison Green See Remarks | AGrant or award Common Stock | +50,000 | $0.00 | $0 | 197,313 | May 19, 2025 |
| May 16, 2025 | Mark D Klein Chairman, CEO and President | AGrant or award Common Stock | +300,000 | $0.00 | $0 | 1,516,019 | May 19, 2025 |
| May 9, 2025 | Mark D Klein Chairman, CEO and President | POpen-market purchase Common Stock | +16,500 | $5.26 | $87k | 1,216,019 | May 9, 2025 |
| Feb 10, 2025 | Allison Green See Remarks | FTax withholding Common Stock | -9,849 | $6.17 | $61k | 147,313 | Feb 12, 2025 |
| Feb 10, 2025 | Mark D Klein Chairman, CEO and President | FTax withholding Common Stock | -32,858 | $6.17 | $203k | 1,199,519 | Feb 12, 2025 |
| Dec 16, 2024 | Allison Green See Remarks | FTax withholding Common Stock | -4,571 | $6.02 | $28k | 157,162 | Dec 18, 2024 |
| Dec 16, 2024 | Mark D Klein Chairman, CEO and President | FTax withholding Common Stock | -17,017 | $6.02 | $102k | 1,232,377 | Dec 18, 2024 |
| Dec 10, 2024 | Allison Green See Remarks | AGrant or award Common Stock | +25,000 | $0.00 | $0 | 161,733 | Dec 12, 2024 |
| Dec 10, 2024 | Mark D Klein Chairman, CEO and President | AGrant or award Common Stock | +100,000 | $0.00 | $0 | 1,270,666 | Dec 12, 2024 |
| Dec 10, 2024 | Mark D Klein Chairman, CEO and President | FTax withholding Common Stock | -21,272 | $6.14 | $131k | 1,249,394 | Dec 12, 2024 |
| Dec 2, 2024 | Mark D Klein Chairman, CEO and President | POpen-market purchase Common Stock | +743 | $5.49 | $4,079 | 1,170,666 | Dec 4, 2024 |
| Dec 2, 2024 | Allison Green See Remarks | POpen-market purchase Common Stock | +9,100 | $5.48 | $50k | 136,734 | Dec 2, 2024 |
| Nov 26, 2024 | Mark D Klein Chairman, CEO and President | POpen-market purchase Common Stock | +10,000 | $5.03 | $50k | 1,098,666 | Nov 29, 2024 |
| Nov 27, 2024 | Mark D Klein Chairman, CEO and President | POpen-market purchase Common Stock | +32,257 | $5.10 | $165k | 1,130,923 | Nov 29, 2024 |
| Nov 29, 2024 | Mark D Klein Chairman, CEO and President | POpen-market purchase Common Stock | +39,000 | $5.20 | $203k | 1,169,923 | Nov 29, 2024 |
| Dec 15, 2023 | Allison Green See Remarks | AGrant or award Common Stock | -25,000 | $0.00 | $0 | 146,597 | Dec 15, 2023 |
| Dec 15, 2023 | Mark D Klein Chairman, CEO and President | AGrant or award Common Stock | -100,000 | $0.00 | $0 | 1,150,224 | Dec 15, 2023 |
Insiders
Everyone who has filed a Form 4 here.
- Erik A Falkdirector
- Allison GreenSee Remarks
- Mark D KleinChairman, CEO and President
- Ronald M. Lottdirector
- Marc Mazurdirector
- Leonard Potterdirector
- Richard C. Szuchdirector
- Lisa Westleydirector
Questions about NSLR
Answered from the filings on this page, as of the latest one.
Are insiders buying NSLR?
As of Sep 22, 2026, SEC Form 4 filings show 3 open-market buys worth $801k by 2 insiders and 1 open-market sell worth $51k by 1 insider at SURO CAPITAL CORP. in the last 90 days, net +$750k. Only purchases (code P) and sales (code S) count; grants, option exercises and tax withholding do not.
Who was the last insider to trade NSLR on the open market?
Mark D Klein (Chairman, CEO and President) bought $40k of NSLR on Sep 21, 2026 and filed the Form 4 on Sep 22, 2026. InsiderTell scored 26 (weak).
How many insiders file Form 4 at SURO CAPITAL CORP.?
8 people have filed a Form 4 at SURO CAPITAL CORP., among them Erik A Falk (director), Allison Green (See Remarks), Mark D Klein (Chairman, CEO and President). Officers, directors and holders of more than 10% of a share class must report their trades within two business days.
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.