Vault-13

SURO CAPITAL CORP NSLR

COM NEW · Common Stock · CUSIP 86887Q109

58 institutional holders -1 vs Q1 2025
5,386,3555.4m shares reported held*
22.5% of all shares outstanding*
$44.2mreported value*
11 new 17 added 13 reduced 15 sold out net sold ≈ $10.5m (-1.3m shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Shares outstanding: 23.9m as of 2025-08-06, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $8.21. Options: 5 managers hold calls ($2.9m notional), 5 hold puts ($709.3k).

Trends to Q2 2025

Institutional holders

Managers reporting a position, each quarter

0255075Q3 22: 70Q4 22: 75Q1 23: 71Q2 23: 61Q3 23: 57Q4 23: 55Q1 24: 49Q2 24: 45Q3 24: 45Q4 24: 56Q1 25: 59Q2 25: 5858Q3 22Q2 23Q1 24Q4 24Q2 25
Numbers
QuarterHolders
Q3 202270
Q4 202275
Q1 202371
Q2 202361
Q3 202357
Q4 202355
Q1 202449
Q2 202445
Q3 202445
Q4 202456
Q1 202559
Q2 202558

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
40040Q3 23: 21 bought or addedQ3 23: 20 cut or sold outQ4 23: 21 bought or addedQ4 23: 25 cut or sold outQ4 23Q1 24: 17 bought or addedQ1 24: 27 cut or sold outQ2 24: 11 bought or addedQ2 24: 22 cut or sold outQ2 24Q3 24: 19 bought or addedQ3 24: 13 cut or sold outQ4 24: 31 bought or addedQ4 24: 17 cut or sold outQ4 24Q1 25: 35 bought or addedQ1 25: 18 cut or sold outQ2 25: 28 bought or addedQ2 25: 28 cut or sold outQ2 25
Numbers
QuarterBought or addedCut or sold out
Q3 20232120
Q4 20232125
Q1 20241727
Q2 20241122
Q3 20241913
Q4 20243117
Q1 20253518
Q2 20252828

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$1m$2m$3m$4mQ3 24 calls: $122.1kQ3 24 puts: $232.1kQ3 24P/C 1.90Q4 24 calls: $753.0kQ4 24 puts: $3.4mQ4 24P/C 4.48Q1 25 calls: $224.6kQ1 25 puts: $577.4kQ1 25P/C 2.57Q2 25 calls: $2.9mQ2 25 puts: $709.3kQ2 25P/C 0.25
Numbers
QuarterCallsPutsP/C
Q3 2024$122.1k$232.1k1.90
Q4 2024$753.0k$3.4m4.48
Q1 2025$224.6k$577.4k2.57
Q2 2025$2.9m$709.3k0.25

Biggest buyers

GABELLI FUNDS LLC Added +176,674+176.7k
ROYAL BANK OF CANADA Added +95,687+95.7k
CITADEL ADVISORS LLC Added +70,609+70.6k
NEEDHAM INVESTMENT MANAGEMENT LLC Added +60,000+60.0k
TWO SIGMA INVESTMENTS, LP Added +59,490+59.5k
GAMCO INVESTORS, INC. ET AL Added +59,250+59.2k
JANE STREET GROUP, LLC Added +52,484+52.5k
Private Advisor Group, LLC New +39,912+39.9k
Virtu Financial LLC New +38,658+38.7k
HARBOR CAPITAL ADVISORS, INC. Added +32,119+32.1k

Biggest sellers

Thomas J. Herzfeld Advisors, Inc. Reduced -1,449,726-1.4m
SUSQUEHANNA INTERNATIONAL GROUP, LLP Sold out -107,456-107.5k
GROUP ONE TRADING LLC Sold out -85,308-85.3k
WOLVERINE TRADING, LLC Sold out -74,295-74.3k
SIMPLEX TRADING, LLC Reduced -60,440-60.4k
LEVIN CAPITAL STRATEGIES, L.P. Reduced -44,773-44.8k
Bulldog Investors, LLP Reduced -28,909-28.9k
XTX Topco Ltd Sold out -27,072-27.1k
Trexquant Investment LP Sold out -26,937-26.9k
MORGAN STANLEY Reduced -25,181-25.2k

Biggest calls

SUSQUEHANNA INTERNATIONAL GROUP, LLP New $1.0m127.7k shares
GROUP ONE TRADING LLC Added $915.4k111.5k shares
SIMPLEX TRADING, LLC New $773.0k94.2k shares
CITADEL ADVISORS LLC Reduced $142.9k17.4k shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Biggest puts

SUSQUEHANNA INTERNATIONAL GROUP, LLP Added $409.7k49.9k shares
CITADEL ADVISORS LLC Added $164.2k20.0k shares
SIMPLEX TRADING, LLC Reduced $78.0k9.6k shares
GROUP ONE TRADING LLC Added $57.5k7.0k shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
GAMCO INVESTORS, INC. ET AL 13D · may seek influence +1.1 pts · filed 2026-09-16
Stated purposeThe Reporting Persons file the long form Schedule 13D pursuant to Section 13d-1 of the Securities Exchange Act of 1934 (the "Act") even though they may be technically eligible to file the short form Schedule G. Because the Reporting Persons may regularly communicate with the Issuer's management, filing the Schedule 13D ensures that these conversations are compliant with the reporting obligations under the Exchange Act. Full filing
6.1% +1.1 pts 1.6m≈ $20.2m 2026-09-16

Insider purchases and sales in Q2 2025

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

Officers and directors buying vs selling

Number of people, by quarter (10% owners not included)

BuyingSelling
202Q3 23: 0 buyingQ3 23: 0 sellingQ4 23: 1 buyingQ4 23: 0 sellingQ4 23Q1 24: 0 buyingQ1 24: 0 sellingQ2 24: 0 buyingQ2 24: 0 sellingQ2 24Q3 24: 1 buyingQ3 24: 0 sellingQ4 24: 2 buyingQ4 24: 1 sellingQ4 24Q1 25: 0 buyingQ1 25: 1 sellingQ2 25: 1 buyingQ2 25: 1 sellingQ2 25
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q3 20230—0——
Q4 20231$457.0k0——
Q1 20240—0——
Q2 20240—0——
Q3 20241$46.1k0——
Q4 20242$471.6k1$2.6k—
Q1 20250—1$59.0k—
Q2 20251$86.8k1$289—
DateInsiderTradeSharesPrice ValueTheir holding
2025-06-11 LOTT RONALD M. Director Sold 39 $7.42 $28939 shares -<1%
2025-05-09 Klein Mark D Chairman, CEO and President, director Bought 16,500 $5.26 $86.8k16.5k shares +1%

Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).

Holders, Q2 2025

#ManagerLocationShares Value% of their portfolioChangeShares change
1 GABELLI FUNDS LLC 0.08% of their portfolio Rye, NY 1,450,8341.5m $11.9m $11.9m 0.08% Added +176.7k +176,674
2 GatePass Capital, LLC 2.79% of their portfolio INDEPENDENCE, OH 512,750512.8k $4.2m $4.2m 2.79% Reduced -16.4k -16,450
3 NEEDHAM INVESTMENT MANAGEMENT LLC 0.29% of their portfolio NEW YORK, NY 438,594438.6k $3.6m $3.6m 0.29% Added +60.0k +60,000
4 GAMCO INVESTORS, INC. ET AL 0.02% of their portfolio GREENWICH, CT 285,000285.0k $2.3m $2.3m 0.02% Added +59.2k +59,250
5 MGO ONE SEVEN LLC 0.07% of their portfolio Beachwood, OH 270,548270.5k $2.2m $2.2m 0.07% Reduced -1.1k -1,127
6 Thomas J. Herzfeld Advisors, Inc. 0.77% of their portfolio MIAMI BEACH, FL 264,336264.3k $2.2m $2.2m 0.77% Reduced -1.4m -1,449,726
7 FRANKLIN RESOURCES INC 0.00% of their portfolio San Mateo, CA 240,545240.5k $2.0m $2.0m 0.00% Added +19.4k +19,350
8 HARBOR CAPITAL ADVISORS, INC. 0.07% of their portfolio CHICAGO, IL 206,652206.7k $1.7m $1.7m 0.07% Added +32.1k +32,119
9 Bulldog Investors, LLP 0.42% of their portfolio SADDLE BROOK, NJ 202,153202.2k $1.7m $1.7m 0.42% Reduced -28.9k -28,909
10 ACADIAN ASSET MANAGEMENT LLC 0.00% of their portfolio Boston, MA 144,164144.2k $1.2m $1.2m 0.00% Added +1.2k +1,227
11 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 128,168128.2k $1.1m $1.1m 0.00% Reduced -25.2k -25,181
12 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 120,658120.7k $992.0k $992.0k 0.00% Added +95.7k +95,687
13 INTREPID FAMILY OFFICE LLC 0.89% of their portfolio SARASOTA, FL 100,000100.0k $821.0k $821.0k 0.89% Unchanged
14 NJ State Employees Deferred Compensation Plan 0.09% of their portfolio TRENTON, NJ 94,11494.1k $772.7k $772.7k 0.09% Unchanged
15 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 88,22288.2k $724.3k $724.3k 0.00% Added +70.6k +70,609
16 Supplemental Annuity Collective Trust of NJ 0.19% of their portfolio TRENTON, NJ 84,00784.0k $689.7k $689.7k 0.19% Unchanged
17 EJF Capital LP 0.52% of their portfolio Arlington, VA 79,11179.1k $649.5k $649.5k 0.52% Added +8.1k +8,100
18 TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio NEW YORK, NY 73,08773.1k $600.0k $600.0k 0.00% Added +59.5k +59,490
19 JANE STREET GROUP, LLC 0.00% of their portfolio NEW YORK, NY 70,63770.6k $579.9k $579.9k 0.00% Added +52.5k +52,484
20 LPL Financial LLC 0.00% of their portfolio FORT MILL, SC 53,51553.5k $439.4k $439.4k 0.00% Added +29.7k +29,718
21 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 50,63150.6k $415.7k $415.7k 0.00% Added +1.6k +1,579
22 Catalyst Capital Advisors LLC 0.01% of their portfolio San Juan, PR 42,46642.5k $348.6k $348.6k 0.01% Unchanged
23 Private Advisor Group, LLC 0.00% of their portfolio MORRISTOWN, NJ 39,91239.9k $327.7k $327.7k 0.00% New
24 Virtu Financial LLC 0.02% of their portfolio New York, NY 38,65838.7k $317.0k $317.0k 0.02% New
25 PRELUDE CAPITAL MANAGEMENT, LLC 0.03% of their portfolio NEW YORK, NY 36,50036.5k $299.7k $299.7k 0.03% Unchanged
26 Granahan Investment Management, LLC 0.01% of their portfolio WALTHAM, MA 34,59934.6k $284.1k $284.1k 0.01% Reduced -4.4k -4,438
27 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 34,08034.1k $279.8k $279.8k 0.00% Reduced -588 -588
28 HRT FINANCIAL LP 0.00% of their portfolio NEW YORK, NY 29,49029.5k $242.0k $242.0k 0.00% New
29 Wellington Shields & Co., LLC 0.06% of their portfolio NEW YORK, NY 26,59126.6k $218.3k $218.3k 0.06% Unchanged
30 INTRINSIC EDGE CAPITAL MANAGEMENT LLC 0.02% of their portfolio CHICAGO, IL 19,65019.6k $161.3k $161.3k 0.02% New
31 Tactive Advisors, LLC 0.05% of their portfolio Jacksonville, FL 18,72018.7k $153.7k $153.7k 0.05% First filing
32 Farther Finance Advisors, LLC 0.00% of their portfolio SAN FRANCISCO, CA 18,39718.4k $151.0k $151.0k 0.00% New
33 UBS Group AG 0.00% of their portfolio ZURICH, V8 16,34916.3k $134.2k $134.2k 0.00% Reduced -8.7k -8,680
34 OXFORD ASSET MANAGEMENT LLP 0.04% of their portfolio OXFORD, X0 14,86614.9k $122.0k $122.0k 0.04% Not comparable
35 Atria Wealth Solutions, Inc. 0.00% of their portfolio NEW YORK, NY 13,40013.4k $110.0k $110.0k 0.00% New
36 Invesco Ltd. 0.00% of their portfolio ATLANTA, GA 12,36112.4k $101.5k $101.5k 0.00% Reduced -165 -165
37 LEVIN CAPITAL STRATEGIES, L.P. 0.01% of their portfolio NEW YORK, NY 10,00010.0k $82.1k $82.1k 0.01% Reduced -44.8k -44,773
38 SIMPLEX TRADING, LLC 0.00% of their portfolio CHICAGO, IL 5,2005.2k $42.0k $42.0k 0.00% Reduced -60.4k -60,440
39 RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio ST. PETERSBURG, FL 3,7823.8k $31.1k $31.1k 0.00% New
40 OSAIC HOLDINGS, INC. 0.00% of their portfolio SCOTTSDALE, AZ 3,3823.4k $27.8k $27.8k 0.00% Reduced -2.8k -2,810
41 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 3,2673.3k $26.8k $26.8k 0.00% Added +2.3k +2,253
42 Avion Wealth 0.01% of their portfolio THE WOODLANDS, TX 3,0013.0k $24.0k $24.0k 0.01% Added +1.4k +1,381
43 STEPH & CO 0.00% of their portfolio MARINETTE, WI 1,5001.5k $12.3k $12.3k 0.00% Unchanged
44 Darwin Wealth Management, LLC 0.00% of their portfolio TAMPA, FL 850850 $7.0k $7.0k 0.00% New
45 Allworth Financial LP 0.00% of their portfolio FOLSOM, CA 427427 $3.5k $3.5k 0.00% Added +108 +108
46 SIERRA OCEAN, LLC 0.00% of their portfolio RIPON, CA 243243 $2.0k $2.0k 0.00% Unchanged
47 JONES FINANCIAL COMPANIES LLLP 0.00% of their portfolio DES PERES, MO 202202 $1.6k $1.6k 0.00% New
48 Chung Wu Investment Group, LLC 0.00% of their portfolio SUGAR LAND, TX 200200 $1.6k $1.6k 0.00% New
49 HAZLETT, BURT & WATSON, INC. 0.00% of their portfolio WHEELING, WV 136136 $1.0k $1.0k 0.00% New
50 Colonial Trust Advisors 0.00% of their portfolio SPARTANBURG, SC 110110 $903 $903 0.00% Unchanged
51 EVOLUTION WEALTH MANAGEMENT INC. 0.00% of their portfolio FORT MYERS, FL 100100 $821 $821 0.00% First filing
52 Citizens National Bank Trust Department 0.00% of their portfolio MERIDIAN, MS 7878 $640 $640 0.00% Unchanged
53 MAI Capital Management 0.00% of their portfolio INDEPENDENCE, OH 5454 $444 $444 0.00% Unchanged
54 Tower Research Capital LLC (TRC) 0.00% of their portfolio NEW YORK, NY 5454 $443 $443 0.00% Reduced -2.0k -2,048
55 BlackRock, Inc. 0.00% of their portfolio New York, NY 22 $16 $16 0.00% Unchanged
56 HUNTINGTON NATIONAL BANK 0.00% of their portfolio COLUMBUS, OH 11 $8 $8 0.00% Unchanged
57 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 11 $4 $4 0.00% Added +1 +1
58 CONCOURSE FINANCIAL GROUP SECURITIES, INC. — of their portfolio BIRMINGHAM, AL 00 $0 $0 — Unchanged