Login
Super Investors PSP Research LLC
PR

PSP Research LLC

Quarterly 13F snapshot: US-listed longs only, no performance figures — 13F data cannot support them.

Portfolio value
$146M
Positions
44
Quarter ended
September 30, 2026
Filed
October 21, 2026

Reported portfolio value by quarter (4 quarters reported)

$188M $114M
Q4 25 Q1 26 Q2 26 Q3 26

$114M in Q4 2025 → $146M now. Hover for any quarter.

Holdings

As reported for the quarter ended September 30, 2026. Activity is the change in share count since the prior quarter's filing.

Holding % of portfolio Activity Shares Value
IT Ishares Tr 48.3% Unchanged 700,000 $70.5M
SS SPDR Series Trust 41.8% Trimmed 32% 386,500 $60.9M
Sera Prognostics Inc 3.4% New 2,396,685 $5.01M
Halozyme Therapeutics Inc 0.2% Trimmed 57% 3,000 $331K
Madrigal Pharmaceuticals Inc 0.2% Unchanged 600 $302K
Exelixis Inc 0.2% Trimmed 38% 5,000 $292K
Royalty Pharma PLC 0.2% Trimmed 55% 5,000 $292K
Argenx Se 0.2% Trimmed 53% 300 $288K
Nurix Therapeutics Inc 0.2% Trimmed 52% 12,000 $285K
Tg Therapeutics Inc 0.2% Trimmed 50% 5,000 $279K
Tarsus Pharmaceuticals Inc 0.2% Trimmed 50% 3,500 $275K
HB Harmony Biosciences Hldgs In 0.2% Trimmed 30% 7,000 $275K
Arcutis Biotherapeutics Inc 0.2% Trimmed 49% 10,000 $264K
KP Kiniksa Pharmaceuticals Intl 0.2% Trimmed 30% 3,500 $261K
Supernus Pharmaceuticals 0.2% Unchanged 6,000 $258K
Immunome Inc 0.2% Trimmed 33% 12,000 $258K
Neurocrine Biosciences Inc 0.2% Trimmed 40% 1,800 $255K
Oruka Therapeutics Inc 0.2% Unchanged 3,000 $250K
Tango Therapeutics Inc 0.2% Unchanged 10,000 $250K
Definium Therapeutics Inc 0.2% Trimmed 35% 6,500 $247K
Revolution Medicines Inc 0.2% Unchanged 1,200 $246K
Alkermes PLC 0.2% Unchanged 6,000 $243K
Aurinia Pharmaceuticals Inc 0.2% Trimmed 50% 15,000 $243K
Incyte Corp 0.2% Trimmed 62% 2,000 $243K
Intellia Therapeutics Inc 0.2% Unchanged 20,000 $241K
Immunovant Inc 0.2% Trimmed 46% 7,000 $236K
Stoke Therapeutics Inc 0.2% Trimmed 25% 9,000 $234K
Krystal Biotech Inc 0.2% Unchanged 692 $230K
Ascendis Pharma A/s 0.2% Trimmed 33% 1,000 $228K
Syndax Pharmaceuticals Inc 0.2% Trimmed 40% 12,000 $226K
Kymera Therapeutics Inc 0.2% Trimmed 50% 2,000 $224K
Dianthus Therapeutics Inc 0.2% Unchanged 2,500 $220K
Trevi Therapeutics Inc 0.1% Trimmed 50% 15,000 $215K
Mirum Pharmaceuticals Inc 0.1% Unchanged 2,500 $214K
IH Immunocore Hldgs PLC 0.1% Trimmed 54% 7,000 $212K
Protagonist Therapeutics Inc 0.1% Trimmed 50% 1,500 $211K
Edgewise Therapeutics Inc 0.1% Unchanged 5,000 $203K
Oric Pharmaceuticals Inc 0.1% Unchanged 13,000 $175K
Dyne Therapeutics Inc 0.1% Trimmed 50% 10,000 $161K
Compass Pathways PLC 0.1% Trimmed 44% 10,000 $124K
Ocular Therapeutix Inc 0.1% Unchanged 15,000 $115K
Cytomx Therapeutics Inc. 0.1% Unchanged 39,400 $107K
Ardelyx Inc 0.1% Trimmed 50% 30,000 $103K
Olema Pharmaceuticals Inc 0.1% Unchanged 10,000 $86.4K

Timeline of changes

What changed each quarter, from the filings' own share counts. Largest moves first; most recent 3 quarters.

Q3 2026

quarter ended September 30, 2026 · filed October 21, 2026

Company Action Shares changed Value of change % of portfolio
SS SPDR Series Trust Trimmed −183,500 −$28.9M 41.8%
Sera Prognostics Inc New +2,396,685 +$5.01M 3.4%
Disc Medicine Inc Exited −8,000 −$585K —
Rapport Therapeutics Inc Exited −14,000 −$583K —
UP Ultragenyx Pharmaceutical In Exited −17,000 −$568K —
Monte Rosa Therapeutics Inc Exited −23,000 −$557K —
Ionis Pharmaceuticals Inc Exited −6,800 −$539K —
Pharvaris N V Exited −15,000 −$519K —
Acadia Pharmaceuticals Inc Exited −19,766 −$500K —
Ptc Therapeutics Inc Exited −6,000 −$489K —

Showing the 10 largest of 60 changes.

Q2 2026

quarter ended June 30, 2026 · filed July 09, 2026

Company Action Shares changed Value of change % of portfolio
SS SPDR Series Trust Added +285,100 +$45.1M 48.0%
Sera Prognostics Inc Exited −2,396,685 −$4.87M —
Definium Therapeutics Inc Trimmed −24,800 −$1.17M 0.3%
Compass Pathways PLC Trimmed −53,000 −$750K 0.1%
Tyra Biosciences Inc Exited −16,000 −$613K —
Ascendis Pharma A/s Exited −2,500 −$572K —
Cytokinetics Inc Exited −8,300 −$547K —
Agios Pharmaceuticals Inc Exited −15,000 −$507K —
PP Praxis Precision Medicines I Exited −1,500 −$483K —
Inhibrx Biosciences Inc Exited −6,927 −$466K —

Showing the 10 largest of 57 changes.

Q1 2026

quarter ended March 31, 2026 · filed April 17, 2026

Company Action Shares changed Value of change % of portfolio
SS SPDR Series Trust New +284,900 +$36.4M 25.7%
Sera Prognostics Inc New +2,396,685 +$4.87M 3.4%
Definium Therapeutics Inc New +34,800 +$658K 0.5%
Dianthus Therapeutics Inc Trimmed −7,725 −$648K 0.3%
Travere Therapeutics Inc Exited −15,272 −$584K —
Jazz Pharmaceuticals PLC Exited −3,258 −$554K —
Cg Oncology Inc Exited −13,293 −$552K —
Belite Bio Inc Exited −3,443 −$551K —
Apellis Pharmaceuticals Inc Exited −21,866 −$549K —
Terns Pharmaceuticals Inc Exited −13,560 −$548K —

Showing the 10 largest of 100 changes.

Create Account

Sign up for free to unlock this feature.

Already have an account? Sign in

Premium Feature

This feature requires a premium subscription to unlock unlimited historical data and advanced analysis tools.

Premium includes:

  • Unlimited historical financial data
  • Advanced analytics and insights
  • Priority support