Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in NSTS held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | ALLIANCEBERNSTEIN L.P. | 516K | $6.7M | +0.6% | 9.816% | 0.00% |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | 190K | $2.2M | — | 3.610% | 0.00% |
| 3 | GRAHAM CAPITAL WEALTH MANAGEMENT, LLC | 101K | $1.2M | +45.0% | 1.917% | 1.04% |
| 4 | RAFFLES ASSOCIATES LP | 94K | $1.1M | 0.0% | 1.782% | 0.95% |
| 5 | Focus Partners Wealth | 61K | $708K | 0.0% | 1.154% | 0.00% |
| 6 | Creative Planning | 45K | $525K | 0.0% | 0.855% | 0.00% |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | 45K | $523K | -1.1% | 0.853% | 0.00% |
| 8 | ROBERTS GLORE & CO INC /IL/ | 36K | $426K | 0.0% | 0.694% | 0.12% |
| 9 | VANGUARD FIDUCIARY TRUST CO | 28K | $327K | — | 0.533% | 0.00% |
| 10 | NORTHERN TRUST CORP | 21K | $247K | -0.7% | 0.402% | 0.00% |
| 11 | RENAISSANCE TECHNOLOGIES LLC | 18K | $204K | +0.0% | 0.333% | 0.00% |
| 12 | BlackRock, Inc. | 12K | $142K | +2.6% | 0.231% | 0.00% |
| 13 | STATE STREET CORP | 11K | $131K | 0.0% | 0.213% | 0.00% |
| 14 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 11K | $130K | — | 0.213% | 0.00% |
| 15 | American Capital Advisory, LLC | 850 | $10K | 0.0% | 0.016% | 0.00% |
| 16 | NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | 500 | $6K | — | 0.009% | 0.00% |
| 17 | HARBOUR INVESTMENTS, INC. | 500 | $6K | 0.0% | 0.009% | 0.00% |
| 18 | Scarborough Advisors, LLC | 150 | $2K | 0.0% | 0.003% | 0.00% |
| 19 | Russell Investments Group, Ltd. | 85 | $991 | — | 0.002% | 0.00% |
| 20 | M3F, Inc. | 27K | $311 | 0.0% | 0.507% | 0.08% |
| 21 | Capital Advisors, Ltd. LLC | 30 | $0 | 0.0% | 0.001% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in NSTS — a direct measure of their conviction.
Filings activity in NSTS during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 21 | +5.0% | 20.10% | 0.38 pp | $15M | 1.9% |
| Q4 2025 | 20 | +18% | 20.48% | +2.68 pp | $15M | +15% |
| Q3 2025 | 17 | 11% | 17.80% | 1.07 pp | $13M | 5.7% |
| Q2 2025 | 19 | +12% | 18.87% | +1.79 pp | $14M | +11% |
| Q1 2025 | 17 | 11% | 17.08% | 0.60 pp | $12M | 3.4% |
| Q4 2024 | 19 | +36% | 17.68% | +2.88 pp | $13M | +20% |
| Q3 2024 | 14 | 18% | 14.80% | +2.28 pp | $11M | +18% |
| Q2 2024 | 17 | — | 12.52% | — | $9M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying NSTS stock.
Based on Q1 2026 13F filings, institutional ownership of NSTS Bancorp, Inc. stands at 20.1%, held across 21 reporting institutions.
ALLIANCEBERNSTEIN L.P. is the largest reported institutional holder of NSTS, with approximately 516,461 shares worth $0.01B as of Q1 2026.
Yes — 2 widely-followed marquee investors appear among the top 25 institutional holders of NSTS, including RENAISSANCE TECHNOLOGIES LLC, SUSQUEHANNA INTERNATIONAL GROUP, LLP.
Our composite Smart Money Score for NSTS is 52 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
5 institutions opened new positions in NSTS during Q1 2026, while 4 fully exited. 2 added to existing positions and 13 trimmed.
NSTS institutional ownership fell by 0.38 percentage points quarter-over-quarter, with a net change of +1 holders.
The top 10 institutions account for 95.7% of all reported 13F value in NSTS, and the top 25 account for 100.0%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
NSTS Bancorp, Inc. (NSTS) Institutional Ownership