Institutional Manager · CIK 0002026172
DIADEMA PARTNERS LP
MORRISTOWN, NJ · File #028-25172
Latest AUM
$580.5M
Positions
145
Top-10 Concentration
47.4%
Filings
5
Portfolio Value Over Time
2024-12
2025-03
2025-06
2025-09
2025-12
Biggest QoQ Changes
Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.
| Action | Issuer | Ticker / CUSIP | Δ Shares | Flow ($) | Price Effect |
|---|---|---|---|---|---|
| NEW | VERTEX PHARMACEUTICALS INC | VRTX | +88,300 | +$40.0M | $0 |
| NEW | SPDR SERIES TRUST | 78464A870 | +250,000 | +$30.5M | $0 |
| REDUCE | REGENERON PHARMACEUTICALS | REGN | -25,160 | -$19.4M | +$6.3M |
| NEW | INVESCO QQQ TR | IVZ | +30,000 | +$18.4M | $0 |
| NEW | STRUCTURE THERAPEUTICS INC | GPCR | +191,700 | +$13.3M | $0 |
| EXITED | SPDR S&P 500 ETF TR | 78462F103 | -20,000 | -$13.3M | $0 |
| NEW | JOHNSON & JOHNSON | JNJ | +50,000 | +$10.3M | $0 |
| ADD | VIKING THERAPEUTICS INC | VKTX | +283,800 | +$10.0M | +$3.6M |
| ADD | AVIDITY BIOSCIENCES INC | 05370A108 | +127,900 | +$9.2M | +$5.7M |
| NEW | INSMED INC | INSM | +52,800 | +$9.2M | $0 |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 2025145 pos · $580.5M
- 13F HOLDINGS REPORTQ/E Sep 2025130 pos · $391.0M
- 13F HOLDINGS REPORTQ/E Jun 202596 pos · $328.2M
- 13F HOLDINGS REPORTQ/E Mar 2025102 pos · $383.3M
- 13F HOLDINGS REPORTQ/E Dec 2024107 pos · $233.1M
Top 20 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | VERTEX PHARMACEUTICALS INC | VRTX | 88,300 | $40.0M | 8.27% |
| 2 | SPDR SERIES TRUST | 78464A870 | 250,000 | $30.5M | 6.30% |
| 3 | PRAXIS PRECISION MEDICINES I | PRAX | 100,600 | $29.7M | 6.13% |
| 4 | VIKING THERAPEUTICS INC | VKTX | 688,900 | $24.2M | 5.01% |
| 5 | AVIDITY BIOSCIENCES INC | 05370A108 | 328,000 | $23.7M | 4.89% |
| 6 | INVESCO QQQ TR | IVZ | 30,000 | $18.4M | 3.81% |
| 7 | JAZZ PHARMACEUTICALS PLC | JAZZ | 105,300 | $17.9M | 3.70% |
| 8 | APOGEE THERAPEUTICS INC | APGE | 211,100 | $15.9M | 3.29% |
| 9 | BRIDGEBIO PHARMA INC | BBIO | 200,000 | $15.3M | 3.16% |
| 10 | TERNS PHARMACEUTICALS INC | TERN | 345,880 | $14.0M | 2.89% |
| 11 | JOHNSON & JOHNSON | JNJ | 66,444 | $13.8M | 2.84% |
| 12 | STRUCTURE THERAPEUTICS INC | GPCR | 191,700 | $13.3M | 2.75% |
| 13 | VIKING THERAPEUTICS INC | VKTX | 336,849 | $11.9M | 2.45% |
| 14 | VIKING THERAPEUTICS INC | VKTX | 316,700 | $11.1M | 2.30% |
| 15 | BRIDGEBIO PHARMA INC | BBIO | 139,600 | $10.7M | 2.21% |
| 16 | JOHNSON & JOHNSON | JNJ | 50,000 | $10.3M | 2.14% |
| 17 | ABIVAX SA | AAVXF | 75,644 | $10.2M | 2.11% |
| 18 | INCYTE CORP | INCY | 100,000 | $9.9M | 2.04% |
| 19 | INSMED INC | INSM | 52,800 | $9.2M | 1.90% |
| 20 | CAPRICOR THERAPEUTICS INC | CAPR | 312,300 | $9.0M | 1.86% |