Partner Fund Management, L.P.
CIK 1442756 · Holdings on Mar 31, 2026 · First reported May 15, 2026
Top ten holdings
Q1 2026- THC7.92%
- LLY6.37%
- PEN4.83%
- AXSM4.70%
- ASND3.66%
- JAZZ3.54%
- NBIX2.99%
- UTHR2.48%
- GKOS2.44%
- CNTA2.21%
Share classes counted separately41.14%
Portfolio value by quarter
What changed this quarter?
Within preview · weight change- JAZZWeight increased · +2.67 pp0.87% → 3.54%Shares +127.63K (+252.68%)
- MDGLWeight increased · +1.45 pp0.43% → 1.88%Shares +26.89K (+370.46%)
- DNTHWeight increased · +1.10 pp0.42% → 1.52%Shares +72.56K (+72.87%)
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 25
USD · B = billion · M = million; expand a row for exact values| # | Security | Value | Weight | Quantity | Weight / quantity change | Activity | |
|---|---|---|---|---|---|---|---|
| 01 | THCTENET HEALTHCARE CORPCOM NEW View history and evidence | $75.21M | 7.92% | 398.57K shares | 8.00% → 7.92%-0.08 pp +800 (+0.20%) | Added | ↗▾ |
| 02 | LLYELI LILLY & CO View history and evidence | $60.49M | 6.37% | 65.76K shares | 7.43% → 6.37%-1.06 pp -2.53K (-3.70%) | Reduced | ↗▾ |
| 03 | PENPENUMBRA INC View history and evidence | $45.90M | 4.83% | 139.78K shares | 4.57% → 4.83%+0.26 pp -5.39K (-3.71%) | Reduced | ↗▾ |
| 04 | AXSMAXSOME THERAPEUTICS INC View history and evidence | $44.67M | 4.70% | 264.30K shares | 4.65% → 4.70%+0.05 pp +12.74K (+5.07%) | Added | ↗▾ |
| 05 | ASNDASCENDIS PHARMA A/SSPONSORED ADR View history and evidence | $34.77M | 3.66% | 152.03K shares | 3.84% → 3.66%-0.18 pp -25.65K (-14.44%) | Reduced | ↗▾ |
| 06 | JAZZJAZZ PHARMACEUTICALS PLCSHS USD View history and evidence | $33.68M | 3.54% | 178.14K shares | 0.87% → 3.54%+2.67 pp +127.63K (+252.68%) | Added | ↗▾ |
| 07 | NBIXNEUROCRINE BIOSCIENCES INC View history and evidence | $28.41M | 2.99% | 215.68K shares | 2.34% → 2.99%+0.65 pp +52.48K (+32.16%) | Added | ↗▾ |
| 08 | UTHRUNITED THERAPEUTICS CORP View history and evidence | $23.60M | 2.48% | 39.80K shares | 3.34% → 2.48%-0.86 pp -27.94K (-41.24%) | Reduced | ↗▾ |
| 09 | GKOSGLAUKOS CORP View history and evidence | $23.22M | 2.44% | 215.69K shares | 2.31% → 2.44%+0.13 pp +14.01K (+6.95%) | Added | ↗▾ |
| 10 | CNTACENTESSA PHARMACEUTICALS-ADRSPONSORED ADS View history and evidence | $20.98M | 2.21% | 528.22K shares | 1.50% → 2.21%+0.71 pp -63.38K (-10.71%) | Reduced | ↗▾ |
Options overlay 6
$146.50M notionalPut and Call positions are separate. Notional is based on underlying securities, not option premium, market value or net exposure. Quantities are underlying shares.
| Security | Put / Call | Underlying shares | Notional | Quantity change | |
|---|---|---|---|---|---|
XBISS SPDR S&P BIOTECH ETFSTATE STREET SPD View history and evidence | Put | 455.30K | $58.16M | +455.30K | ▾ |
XLVSS HEALTH CARE SELECT SECTORSTATE STREET HEA View history and evidence | Call | 238.90K | $35.03M | +238.90K | ▾ |
UTHRUNITED THERAPEUTICS CORP View history and evidence | Put | 45.90K | $27.22M | +45.90K | ▾ |
3 / 6 options · preview only
Exited positions 19
| Security | Type | Shares out | Value out | Previous filing | This filing |
|---|---|---|---|---|---|
| ADMA ADMA BIOLOGICS INC | Non-derivative | -1,270,894 | -$23.18M | SEC filing ↗ | SEC filing ↗ |
| MDT MEDTRONIC PLC | Non-derivative | -213,796 | -$20.54M | SEC filing ↗ | SEC filing ↗ |
| MRK MERCK & CO. INC. | Non-derivative | -187,834 | -$19.77M | SEC filing ↗ | SEC filing ↗ |
3 / 19 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 1442756 · Period 2026-03-31
Data loaded 2026-09-23 · First reported 2026-05-15
Amendments and versions
{
"amendments_merged": null,
"prior_versions": null,
"cover_table_value": 1096740595
}Research all 83 reported holdings.
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