New Positions
1 managers initiated
Top five by reported value
- SIMPLEX TRADING, LLC$216.3K
Loma Negra Compañía Industrial Argentina Sociedad Anónima NYQ:LOMA
Institutional holders, quarter-over-quarter share deltas, and new and closed positions disclosed in Form 13F. Period 2025-12-31 · prior 2025-09-30.
1 new0 added1 reduced0 exited
Total Institutional Holders
2
as of 2025-12-31
Top Holder
GROUP ONE TRADING, L.P.
$483.0K
Largest QoQ Increase
SIMPLEX TRADING, LLC
+16,700 sh
Largest QoQ Decrease
GROUP ONE TRADING, L.P.
-48,900 sh
New Positions(1)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| SIMPLEX TRADING, LLC | 16,700 | +16,700 | $216.3K | +$216.3K | — |
Reduced(1)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| GROUP ONE TRADING, L.P. | 37,300 | -48,900 | $483.0K | -$152.3K | -56.7% |
Top Holders by reported value
Ranked by the dollar value reported on the latest Form 13F. Share counts reflect long positions as of 2025-12-31.
| Manager | Shares | $ Value | Δ Shares | QoQ % |
|---|---|---|---|---|
| GROUP ONE TRADING, L.P. | 37,300 | $483.0K | -48,900 | -56.7% |
| SIMPLEX TRADING, LLC | 16,700 | $216.3K | +16,700 | — |
New & Closed Positions this quarter
Closed Positions
0 managers exited
Top five by prior-quarter value
No managers exited their positions this quarter.
Methodology
Form 13F is the SEC's quarterly disclosure for institutional investment managers exercising discretion over $100 million or more in qualifying U.S. equity securities. Managers must file within 45 days of each calendar quarter end, which is why holdings shown here reflect a snapshot at the period date — not real-time positioning.
Quarter-over-quarter deltas compare each manager's most recently reported share count for LOMA against its prior-quarter count. New positions are entries where the prior count was zero; closed positions are entries where the current count is zero. Amendments (13F-HR/A) replace prior filings for the same period.
Source: SEC EDGAR Form 13F (XML information tables). Dollar values are as reported by the manager and may use mid-quarter pricing conventions. CUSIP-to-ticker resolution is best-effort.