BAMCO INC /NY/
CIK 1017918 · Holdings on Dec 31, 2025 · First reported Feb 17, 2026
Top ten holdings
Q4 2025- TSLA14.53%
- ACGL4.67%
- MSCI4.28%
- CSGP3.55%
- IDXX3.30%
- IT2.88%
- GWRE2.80%
- H2.65%
- FDS2.27%
- RRR2.10%
Share classes counted separately43.03%
Portfolio value by quarter
What changed this quarter?
Within preview · weight change- FDSWeight increased · +0.89 pp1.38% → 2.27%Shares +1.07M (+58.81%)
- FIGSWeight increased · +0.79 pp1.06% → 1.85%Shares +25.00K (+0.04%)
- CSGPWeight decreased · -0.76 pp4.31% → 3.55%Shares +242.53K (+1.26%)
Weight = security value ÷ total reported holdings value. Changes are in percentage points; price moves also affect weights, so they are not trade sizes.
Top 10 holdings 30
USD · B = billion · M = million; expand a row for exact values| # | Security | Value | Weight | Quantity | Weight / quantity change | Activity | |
|---|---|---|---|---|---|---|---|
| 01 | TSLATESLA INC View history and evidence | $5.36B | 14.53% | 11.93M shares | 14.09% → 14.53%+0.44 pp -20.14K (-0.17%) | Reduced | ↗▾ |
| 02 | ACGLARCH CAPITAL GROUP LTDORD View history and evidence | $1.73B | 4.67% | 17.99M shares | 4.51% → 4.67%+0.16 pp -772.15K (-4.12%) | Reduced | ↗▾ |
| 03 | MSCIMSCI INC View history and evidence | $1.58B | 4.28% | 2.76M shares | 3.60% → 4.28%+0.68 pp +361.63K (+15.10%) | Added | ↗▾ |
| 04 | CSGPCOSTAR GROUP INC View history and evidence | $1.31B | 3.55% | 19.50M shares | 4.31% → 3.55%-0.76 pp +242.53K (+1.26%) | Added | ↗▾ |
| 05 | IDXXIDEXX LABORATORIES INC View history and evidence | $1.22B | 3.30% | 1.80M shares | 3.19% → 3.30%+0.11 pp -86.09K (-4.57%) | Reduced | ↗▾ |
| 06 | ITGARTNER INC View history and evidence | $1.06B | 2.88% | 4.21M shares | 3.01% → 2.88%-0.13 pp -109.16K (-2.53%) | Reduced | ↗▾ |
| 07 | GWREGUIDEWIRE SOFTWARE INC View history and evidence | $1.03B | 2.80% | 5.15M shares | 3.15% → 2.80%-0.35 pp -21.30K (-0.41%) | Reduced | ↗▾ |
| 08 | HHYATT HOTELS CORP - CL ACOM CL A View history and evidence | $978.99M | 2.65% | 6.11M shares | 2.30% → 2.65%+0.35 pp -10.19K (-0.17%) | Reduced | ↗▾ |
| 09 | FDSFACTSET RESEARCH SYSTEMS INC View history and evidence | $838.31M | 2.27% | 2.89M shares | 1.38% → 2.27%+0.89 pp +1.07M (+58.81%) | Added | ↗▾ |
| 10 | RRRRED ROCK RESORTS INC-CLASS ACL A View history and evidence | $775.61M | 2.10% | 12.52M shares | 1.99% → 2.10%+0.11 pp +250.72K (+2.04%) | Added | ↗▾ |
Options overlay 0
No options reported this quarter.
Exited positions 36
| Security | Type | Shares out | Value out | Previous filing | This filing |
|---|---|---|---|---|---|
| TREX TREX COMPANY INC | Non-derivative | -1,589,735 | -$82.14M | SEC filing ↗ | SEC filing ↗ |
| ITGR INTEGER HOLDINGS CORP | Non-derivative | -766,055 | -$79.16M | SEC filing ↗ | SEC filing ↗ |
| DUOL DUOLINGO | Non-derivative | -243,708 | -$78.43M | SEC filing ↗ | SEC filing ↗ |
3 / 36 preview exits. Up to 30 exit records are previewed. Exit means absent from the current filing; execution date, price and proceeds are unknown.
Every number has a source.
CIK 1017918 · Period 2025-12-31
Data loaded 2026-09-23 · First reported 2026-02-17
Amendments and versions
{
"amendments_merged": null,
"prior_versions": null,
"cover_table_value": 36910805474
}Research all 327 reported holdings.
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