BAMCO INC /NY/
"13F equity value" = market value of this filer's US-listed long equity positions only. It excludes cash, bonds, non-US and short positions, so it understates a fund's true assets under management — often by a lot.
13F holdings are disclosed ~45 days after quarter-end, and they never reveal when within the quarter a fund actually bought. So any 13F-based summary is structurally late and blurred — this applies to every fund, including this one.
We backtested copying it anyway. Buying this fund's new positions the day each filing went public, over 51 quarters, returned +2.4% per quarter — versus +2.0% per quarter from simply owning every 13F stock. It beat that baseline in only 49.0% of quarters (excess t = -0.44, not statistically significant). Its filings tell you what it bought — not what you should buy.
Quarterly compounding, invested quarters only · entry after the actual SEC deadline plus a 2-day buffer
Top 20 holdings of 345 · 2026 Q2
| Ticker | Value | Weight | QoQ |
|---|---|---|---|
| SPCX | $24.9B | | NEW |
| TSLA | $5.3B | | ADD +5% |
| MSCI | $1.8B | | ADD +19% |
| ACGL | $1.5B | | TRIM −5% |
| H | $1.4B | | ADD +15% |
| SHOP | $1.3B | | ADD ×2.4 |
| SPOT | $1.1B | | ADD +84% |
| GWRE | $1.1B | | ADD +36% |
| SCHW | $1.1B | | ADD +56% |
| RRR | $1.1B | | ADD +22% |
| IDXX | $1.0B | | ADD +21% |
| CHH | $1.0B | | ADD +21% |
| IT | $985M | | ADD +28% |
| FDS | $967M | | ADD +12% |
| MTN | $890M | | ADD +30% |
| KNSL | $879M | | ADD +31% |
| VRSK | $844M | | ADD +87% |
| FIGS | $613M | | HOLD |
| CSGP | $612M | | ADD +33% |
| ONON | $600M | | ADD +74% |
QoQ vs previous quarter's share count · NEW = new position · ADD/TRIM = ±2% shares · HOLD = unchanged.
New positions in 2026 Q2
Method & Limitations
Method: a "new position" = held this quarter, absent last quarter (options excluded; stocks with <50 prior holders excluded to filter spin-off artifacts). Entry is the first trading session after the actual SEC filing deadline plus a 2-day buffer. Benchmark = equal-weighted universe of all 13F-held stocks. Limitations: quarterly snapshots can't see intra-quarter trades; survivorship bias — funds that shut down are absent, which flatters the sample. Statistics, not advice.