33% buyers of institutions opening or closing positions this quarter
3.5% institutional ownership
XTX Topco Ltd portfolio allocation
Institutional ownership vs Specialty Business Services peers
No Form 4 insider transactions on file
Latest positioning in BLMZ across 13F flow, ownership shift, marquee holders, and holder-count growth.
Ranked by reported Q4 2025 13F market value
Share of total reported institutional value in BLMZ held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | XTX Topco Ltd | 27K | $536 | — | 2.145% | 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 BLMZ — a direct measure of their conviction.
Filings activity in BLMZ during Q4 2025, grouped by how each filer changed its position.
No institutions fully exited this quarter.
6 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q4 2025 | 1 | 50% | 3.50% | 15.26 pp | $0M | 81% |
| Q3 2025 | 2 | 67% | 18.76% | 130.00 pp | $0M | 87% |
| Q2 2025 | 6 | +0.0% | 148.76% | 51.23 pp | $0M | 63% |
| Q1 2025 | 6 | 25% | 199.99% | +0.00 pp | $0M | +36% |
| Q4 2024 | 8 | +100% | 199.99% | +119.17 pp | $0M | +268% |
| Q3 2024 | 4 | — | 80.82% | — | $0M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
No recent Form 4 insider transactions on file for BLMZ.
Quick answers to the most common questions about buying BLMZ stock.
Based on Q4 2025 13F filings, institutional ownership of Harrison Global Holdings Inc. stands at 3.5%, held across 1 reporting institutions.
XTX Topco Ltd is the largest reported institutional holder of BLMZ, with approximately 26,672 shares worth $0.00B as of Q4 2025.
No marquee "smart money" managers (Berkshire, Burry, ARK, Tiger Global, Pershing Square, Baupost, etc.) currently appear among the top 25 institutional holders of BLMZ.
Our composite Smart Money Score for BLMZ is 20 out of 100 (Bearish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
1 institutions opened new positions in BLMZ during Q4 2025, while 2 fully exited. 0 added to existing positions and 0 trimmed.
BLMZ institutional ownership fell by 15.26 percentage points quarter-over-quarter, with a net change of — holders.
The top 10 institutions account for 100.0% of all reported 13F value in BLMZ, 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.