Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in STRR held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | Mink Brook Asset Management LLC | 316K | $3.2M | +0.5% | 8.554% | 1.81% |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | 135K | $1.4M | — | 3.644% | 0.00% |
| 3 | Cable Car Capital, LP | 100K | $1.0M | +74.6% | 2.707% | 0.36% |
| 4 | RENAISSANCE TECHNOLOGIES LLC | 81K | $832K | +2.8% | 2.190% | 0.00% |
| 5 | North Star Investment Management Corp. | 55K | $565K | — | 1.488% | 0.03% |
| 6 | BlackRock, Inc. | 53K | $549K | 0.0% | 1.445% | 0.00% |
| 7 | DIMENSIONAL FUND ADVISORS LP | 42K | $430K | -25.1% | 1.133% | 0.00% |
| 8 | RBF Capital, LLC | 28K | $289K | 0.0% | 0.761% | 0.02% |
| 9 | Manatuck Hill Partners, LLC | 27K | $272K | -16.7% | 0.717% | 0.09% |
| 10 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | 25K | $252K | 0.0% | 0.663% | 0.01% |
| 11 | GEODE CAPITAL MANAGEMENT, LLC | 24K | $251K | -21.9% | 0.660% | 0.00% |
| 12 | VANGUARD FIDUCIARY TRUST CO | 18K | $184K | — | 0.484% | 0.00% |
| 13 | HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC | 12K | $123K | 0.0% | 0.323% | 0.00% |
| 14 | Rothschild Wealth LLC | 11K | $116K | — | 0.306% | 0.01% |
| 15 | CWM, LLC | 2K | $22K | — | 0.057% | 0.00% |
| 16 | Vanguard Global Advisers, LLC | 1K | $11K | — | 0.029% | 0.00% |
| 17 | SBI Securities Co., Ltd. | 533 | $5K | 0.0% | 0.014% | 0.00% |
| 18 | Tower Research Capital LLC (TRC) | 328 | $3K | -21.1% | 0.009% | 0.00% |
| 19 | ROYAL BANK OF CANADA | 140 | $1K | 0.0% | 0.004% | 0.00% |
| 20 | FEDERATED HERMES, INC. | 78 | $802 | -7.1% | 0.002% | 0.00% |
| 21 | MORGAN STANLEY | 6 | $63 | +20.0% | 0.000% | 0.00% |
| 22 | NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | 3 | $31 | — | 0.000% | 0.00% |
| 23 | CITIGROUP INC | 1 | $10 | — | 0.000% | 0.00% |
| 24 | UBS Group AG | 1 | $10 | -99.2% | 0.000% | 0.00% |
| 25 | WHITTIER TRUST CO OF NEVADA INC | 1 | $10 | 0.0% | 0.000% | 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 STRR — a direct measure of their conviction.
Filings activity in STRR 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 | 25 | +19% | 23.45% | 1.95 pp | $10M | 7.6% |
| Q4 2025 | 21 | 8.7% | 25.40% | 1.97 pp | $10M | 7.2% |
| Q3 2025 | 23 | 15% | 27.37% | 1.10 pp | $11M | 3.8% |
| Q2 2025 | 27 | +8.0% | 28.47% | 8.97 pp | $12M | 24% |
| Q1 2025 | 25 | 17% | 37.44% | 9.26 pp | $15M | 20% |
| Q4 2024 | 30 | +25% | 46.70% | 0.25 pp | $19M | 0.5% |
| Q3 2024 | 24 | 7.7% | 46.95% | 0.85 pp | $19M | 1.8% |
| Q2 2024 | 26 | — | 47.80% | — | $20M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Latest Form 4 transactions by company officers and directors. Insider buys are widely viewed as the highest-conviction signal because executives are risking personal capital.
| Date | Insider | Action | Shares | Price | Value |
|---|---|---|---|---|---|
| Jun 5, 2026 | Eberwein Jeffrey E. | Buy | 3K | $11.51 | $40K |
| Jun 5, 2026 | Palmer Jennifer | Buy | 686 | $11.66 | $8K |
| Jun 5, 2026 | Drake Mimi K | Buy | 1K | $11.65 | $12K |
| Jun 2, 2026 | Eberwein Jeffrey E. | Buy | 5K | $11.61 | $57K |
| Jun 1, 2026 | Fruhbeis Todd Michael | Buy | 700 | $11.72 | $8K |
| May 29, 2026 | Parks Louis A. | Buy | 1K | $11.60 | $12K |
| May 28, 2026 | Eberwein Jeffrey E. | Buy | 310 | $11.69 | $4K |
Quick answers to the most common questions about buying STRR stock.
Based on Q1 2026 13F filings, institutional ownership of Star Equity Holdings, Inc. stands at 23.4%, held across 25 reporting institutions.
Mink Brook Asset Management LLC is the largest reported institutional holder of STRR, with approximately 316,139 shares worth $0.00B as of Q1 2026.
Yes — 1 widely-followed marquee investor appear among the top 25 institutional holders of STRR, including RENAISSANCE TECHNOLOGIES LLC.
Our composite Smart Money Score for STRR is 44 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
8 institutions opened new positions in STRR during Q1 2026, while 4 fully exited. 2 added to existing positions and 15 trimmed.
STRR institutional ownership fell by 1.95 percentage points quarter-over-quarter, with a net change of +4 holders.
The top 10 institutions account for 92.5% of all reported 13F value in STRR, 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.
Star Equity Holdings, Inc. (STRR) Institutional Ownership