New Positions
8 managers initiated
Top five by reported value
- Sentinus, LLC$1.0M
- Hillsdale Investment Management Inc.$288.1K
- CITADEL ADVISORS LLC$84.6K
- XTX Topco Ltd$64.8K
- Ancora Advisors, LLC$10.3K
Research Solutions Inc NASDAQ NMS - GLOBAL MARKET:RSSS
Institutional holders, quarter-over-quarter share deltas, and new and closed positions disclosed in Form 13F. Period 2025-12-31 · prior 2025-09-30.
8 new17 added15 reduced17 exited
Total Institutional Holders
40
as of 2025-12-31
Top Holder
NEEDHAM INVESTMENT MANAGEMENT LLC
$9.2M
Largest QoQ Increase
Sentinus, LLC
+356,818 sh
Largest QoQ Decrease
Cove Street Capital, LLC
-1,335,627 sh
New Positions(8)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| Sentinus, LLC | 356,818 | +356,818 | $1.0M | +$1.0M | — |
| Hillsdale Investment Management Inc. | 98,000 | +98,000 | $288.1K | +$288.1K | — |
| CITADEL ADVISORS LLC | 28,765 | +28,765 | $84.6K | +$84.6K | — |
| XTX Topco Ltd | 22,030 | +22,030 | $64.8K | +$64.8K | — |
| Ancora Advisors, LLC | 3,490 | +3,490 | $10.3K | +$10.3K | — |
| UBS Group AG | 2,345 | +2,345 | $6.9K | +$6.9K | — |
| Tower Research Capital LLC (TRC) | 1,152 | +1,152 | $3.4K | +$3.4K | — |
| Allworth Financial LP | 104 | +104 | $306 | +$306 | — |
Added To(17)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| NEEDHAM INVESTMENT MANAGEMENT LLC | 3,145,000 | +45,000 | $9.2M | -$2.3M | 1.4% |
| VANGUARD GROUP INC | 1,264,105 | +9,963 | $3.7M | -$961.5K | 0.8% |
| Topline Capital Management, LLC | 554,506 | +309,578 | $1.6M | +$716.7K | 126.4% |
| BARD ASSOCIATES INC | 610,384 | +1,623 | $1.8M | -$476.1K | 0.3% |
| Luxor Capital Group, LP | 651,959 | +74,526 | $1.9M | -$237.1K | 12.9% |
| GEODE CAPITAL MANAGEMENT, LLC | 287,915 | +920 | $846.6K | -$224.1K | 0.3% |
| Dynamic Advisor Solutions LLC | 289,517 | +13,483 | $851.2K | -$178.4K | 4.9% |
| RENAISSANCE TECHNOLOGIES LLC | 218,200 | +11,756 | $641.5K | -$128.5K | 5.7% |
| BlackRock, Inc. | 116,616 | +2,933 | $342.9K | -$81.2K | 2.6% |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 48,002 | +21,927 | $141.1K | +$43.9K | 84.1% |
| JANE STREET GROUP, LLC | 25,826 | +15,438 | $75.9K | +$37.2K | 148.6% |
| DIMENSIONAL FUND ADVISORS LP | 77,029 | +9,358 | $226.5K | -$25.9K | 13.8% |
| NORTHERN TRUST CORP | 56,619 | +6,524 | $166.5K | -$20.4K | 13.0% |
| BANK OF AMERICA CORP /DE/ | 10,989 | +6,966 | $32.3K | +$17.3K | 173.2% |
| GOLDMAN SACHS GROUP INC | 42,979 | +6,729 | $126.4K | -$8.9K | 18.6% |
| MORGAN STANLEY | 1,932 | +472 | $5.7K | +$234 | 32.3% |
| ACADIAN ASSET MANAGEMENT LLC | 77,632 | +6,131 | $225 | -$38 | 8.6% |
Reduced(15)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC. | 2,499,310 | 0 | $7.3M | -$2.0M | 0.0% |
| PARTHENON LLC | 392,284 | 0 | $1.2M | -$309.9K | 0.0% |
| PERRITT CAPITAL MANAGEMENT INC | 356,818 | 0 | $1.0M | -$281.9K | 0.0% |
| Navalign, LLC | 98,580 | -45,000 | $289.8K | -$245.7K | -31.3% |
| LPL Financial LLC | 146,307 | -3,000 | $430.1K | -$126.8K | -2.0% |
| NewEdge Advisors, LLC | 3,370 | -19,005 | $9.9K | -$73.6K | -84.9% |
| 4Thought Financial Group Inc. | 84,185 | 0 | $247.5K | -$66.5K | 0.0% |
| Integrated Quantitative Investments LLC | 72,500 | 0 | $213.2K | -$57.3K | 0.0% |
| HighTower Advisors, LLC | 68,336 | -500 | $200.9K | -$55.9K | -0.7% |
| STATE STREET CORP | 58,807 | 0 | $172.9K | -$46.5K | 0.0% |
| Greenhaven Road Investment Management, L.P. | 38,477 | 0 | $113.1K | -$30.4K | 0.0% |
| KING LUTHER CAPITAL MANAGEMENT CORP | 35,000 | 0 | $102.9K | -$27.6K | 0.0% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 18,069 | 0 | $53.1K | -$14.3K | 0.0% |
| BNP PARIBAS ARBITRAGE, SNC | 468 | -876 | $1.4K | -$3.6K | -65.2% |
| WELLS FARGO & COMPANY/MN | 1 | 0 | $3 | -$1 | 0.0% |
Sold Out(17)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| Cove Street Capital, LLC | 0 | -1,335,627 | $0 | -$5.0M | — |
| Hodges Capital Management Inc. | 0 | -185,500 | $0 | -$691.9K | — |
| WHITE PINE CAPITAL LLC | 0 | -119,435 | $0 | -$445.5K | — |
| Ridgewood Investments LLC | 0 | -78,151 | $0 | -$291.5K | — |
| ASHFORD CAPITAL MANAGEMENT INC | 0 | -50,000 | $0 | -$186.5K | — |
| Heron Bay Capital Management | 0 | -43,306 | $0 | -$161.5K | — |
| ADVISOR GROUP HOLDINGS, INC. | 0 | -13,900 | $0 | -$53.8K | — |
| Cubist Systematic Strategies, LLC | 0 | -11,360 | $0 | -$42.4K | — |
| Spire Wealth Management | 0 | -1,374 | $0 | -$5.1K | — |
| Royal Bank of Canada | 0 | -1,695 | $0 | -$4.0K | — |
| JONES FINANCIAL COMPANIES LLLP | 0 | -500 | $0 | -$1.9K | — |
| FMR LLC | 0 | -500 | $0 | -$1.9K | — |
| Marquette Asset Management, LLC | 0 | -451 | $0 | -$1.7K | — |
| American Capital Advisory, LLC | 0 | -100 | $0 | -$373 | — |
| GSA CAPITAL PARTNERS LLP | 0 | -22,068 | $0 | -$82 | — |
| HRT FINANCIAL LP | 0 | -15,856 | $0 | -$59 | — |
| CITIGROUP INC | 0 | -1 | $0 | -$4 | — |
Top Holders by reported value
Ranked by the dollar value reported on the latest Form 13F. Share counts reflect long positions as of 2025-12-31.
| Manager | Shares | $ Value | Δ Shares | QoQ % |
|---|---|---|---|---|
| NEEDHAM INVESTMENT MANAGEMENT LLC | 3,145,000 | $9.2M | +45,000 | 1.4% |
| PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC. | 2,499,310 | $7.3M | 0 | 0.0% |
| VANGUARD GROUP INC | 1,264,105 | $3.7M | +9,963 | 0.8% |
| Luxor Capital Group, LP | 651,959 | $1.9M | +74,526 | 12.9% |
| BARD ASSOCIATES INC | 610,384 | $1.8M | +1,623 | 0.3% |
| Topline Capital Management, LLC | 554,506 | $1.6M | +309,578 | 126.4% |
| PARTHENON LLC | 392,284 | $1.2M | 0 | 0.0% |
| PERRITT CAPITAL MANAGEMENT INC | 356,818 | $1.0M | 0 | 0.0% |
| Sentinus, LLC | 356,818 | $1.0M | +356,818 | — |
| Dynamic Advisor Solutions LLC | 289,517 | $851.2K | +13,483 | 4.9% |
| GEODE CAPITAL MANAGEMENT, LLC | 287,915 | $846.6K | +920 | 0.3% |
| RENAISSANCE TECHNOLOGIES LLC | 218,200 | $641.5K | +11,756 | 5.7% |
| LPL Financial LLC | 146,307 | $430.1K | -3,000 | -2.0% |
| BlackRock, Inc. | 116,616 | $342.9K | +2,933 | 2.6% |
| Navalign, LLC | 98,580 | $289.8K | -45,000 | -31.3% |
| Hillsdale Investment Management Inc. | 98,000 | $288.1K | +98,000 | — |
| 4Thought Financial Group Inc. | 84,185 | $247.5K | 0 | 0.0% |
| DIMENSIONAL FUND ADVISORS LP | 77,029 | $226.5K | +9,358 | 13.8% |
| Integrated Quantitative Investments LLC | 72,500 | $213.2K | 0 | 0.0% |
| HighTower Advisors, LLC | 68,336 | $200.9K | -500 | -0.7% |
New & Closed Positions this quarter
Closed Positions
17 managers exited
Top five by prior-quarter value
- Cove Street Capital, LLC$5.0M
- Hodges Capital Management Inc.$691.9K
- WHITE PINE CAPITAL LLC$445.5K
- Ridgewood Investments LLC$291.5K
- ASHFORD CAPITAL MANAGEMENT INC$186.5K
Methodology
Form 13F is the SEC's quarterly disclosure for institutional investment managers exercising discretion over $100 million or more in qualifying U.S. equity securities. Managers must file within 45 days of each calendar quarter end, which is why holdings shown here reflect a snapshot at the period date — not real-time positioning.
Quarter-over-quarter deltas compare each manager's most recently reported share count for RSSS against its prior-quarter count. New positions are entries where the prior count was zero; closed positions are entries where the current count is zero. Amendments (13F-HR/A) replace prior filings for the same period.
Source: SEC EDGAR Form 13F (XML information tables). Dollar values are as reported by the manager and may use mid-quarter pricing conventions. CUSIP-to-ticker resolution is best-effort.