SEC 13F Intelligence

Managers / Q3 2023 · view latest →

Aquilo Capital Management, LLC

CIK 0001591986 · ONE LETTERMAN DRIVE, SUITE D4900, BUILDING D, SAN FRANCISCO, CA, 94129 · 415-635-0140

Reported Value
$110M
Q3 2023
Positions
12
Filings on Record
27
2019–present window
Filed
Nov 14, 2023
original filing

Summary

Aquilo Capital Management, LLC reported $110M in U.S.-listed holdings across 12 positions for Q3 2023.

The portfolio is heavily concentrated: ARWR alone accounts for 22.1% of reported value.

Compared with Q2 2023, the fund opened 0 new positions and exited 1.

Portfolio Metrics

Turnover
+5.3%
vs prior filed quarter
Top-10 Concentration
+98.1%
share of reported value
Largest Position
+22.1%
Arrowhead Pharmaceuticals In

Methodology: turnover is min(value bought, value sold) ÷ average reported value across the two quarters — value-based, so market moves inflate it slightly versus a share-based measure. Concentration and largest position are shares of the filing’s total reported value, options excluded, with multiple share classes and repeated sub-manager rows for the same issuer combined into one position — the same rule the holdings table uses by default. New/exited counts compare against the prior filed quarter. All figures derive solely from the fund’s 13F filings.

Reported Value by Quarter

13F Reported Value
Q1 ’19: $226MQ1 ’19Q2 ’19: $288MQ3 ’19: $142MQ4 ’19: $266MQ1 ’20: $257MQ1 ’20Q2 ’20: $496MQ3 ’20: $945MQ4 ’20: $481MQ1 ’21: $553MQ1 ’21Q2 ’21: $385MQ3 ’21: $551MQ4 ’21: $882MQ1 ’22: $680MQ1 ’22Q2 ’22: $293MQ3 ’22: $277MQ4 ’22: $266MQ1 ’23: $241MQ1 ’23Q2 ’23: $180MQ3 ’23: $110MQ4 ’23: $160MQ1 ’24: $133MQ1 ’24Q2 ’24: $104MQ3 ’24: $132MQ4 ’24: $66MQ1 ’25: $56MQ1 ’25Q2 ’25: $0Q3 ’25: $0filingsflow.com

Portfolio Composition

By security type
Common Stock: 75.8%ADR: 15.0%Other: 9.2%
  • Common Stock · 75.8% · $84M
  • ADR · 15.0% · $17M
  • Other · 9.2% · $10M

Quarter-over-Quarter Changes full breakdown →

vs Q2 2023 (amended baseline)

IssuerMoveShare ΔShares nowValue ΔValue now
CCCCC4 THERAPEUTICS INCADDED+1.23M1.99M+$2M$4M
IWMISHARES RUSSELL 2000 ETF TRSOLD OUT150.0K0$28M$0
ARGXARGENX SETRIMMED12.6K3.7K$5M$2M
GMABGENMAB A/STRIMMED122.5K52.1K$5M$2M
OLMAOLEMA PHARMACEUTICALS INCTRIMMED161.1K88.9K$1M$1M
MERUS N VTRIMMED345.0K430.1K$10M$10M
ARVNARVINAS INCTRIMMED134.8K489.2K$6M$10M
KYMRKYMERA THERAPEUTICS INCADDED+130.9K782.2K$4M$11M

Value changes conflate price moves with buying and selling — share changes are the real signal. Share counts are not split-adjusted.

Holdings — Q3 2023

12 positions
#IssuerClass% PortfolioValueShares
1ARWRARROWHEAD PHARMACEUTICALS INhistory →COM22.12%$24M908.5K
2BLUEPRINT MEDICINES CORPCOM17.25%$19M379.1K
3RGNXREGENXBIO INChistory →COM12.64%$14M847.4K
4SLNSILENCE THERAPEUTICS PLChistory →ADS11.68%$13M1.31M
5KYMRKYMERA THERAPEUTICS INChistory →COM9.85%$11M782.2K
6MERUS N VCOM9.19%$10M430.1K
7ARVNARVINAS INChistory →COM8.71%$10M489.2K
8CCCCC4 THERAPEUTICS INChistory →COM STK3.35%$4M1.99M
9GMABGENMAB A/Shistory →SPONSORED ADS1.67%$2M52.1K
10ARGXARGENX SEhistory →SPONSORED ADR1.66%$2M3.7K
11OLMAOLEMA PHARMACEUTICALS INCCOM0.99%$1M88.9K
12PIERIS PHARMACEUTICALS INCCOM0.89%$984,3513.30M

Filing History

QuarterReported ValuePositionsFiledTypeLinks
Q3 2025$01Nov 12, 202513F-HRchanges · EDGAR ↗
Q2 2025$01Aug 6, 202513F-HRchanges · EDGAR ↗
Q1 2025$56M13May 15, 202513F-HRchanges · EDGAR ↗
Q4 2024$66M15Feb 14, 202513F-HRchanges · EDGAR ↗
Q3 2024$132M14Nov 14, 202413F-HRchanges · EDGAR ↗
Q2 2024$104M13Aug 14, 202413F-HRchanges · EDGAR ↗
Q1 2024$133M10May 15, 202413F-HRchanges · EDGAR ↗
Q4 2023$160M10Feb 14, 202413F-HRchanges · EDGAR ↗
Q3 2023$110M12Nov 14, 202313F-HRchanges · EDGAR ↗
Q2 2023$180M13Aug 14, 202313F-HRchanges · EDGAR ↗
Q1 2023$241M12May 15, 202313F-HRchanges · EDGAR ↗
Q4 2022$266M13Feb 14, 202313F-HRchanges · EDGAR ↗
Q3 2022$277M15Nov 14, 202213F-HRchanges · EDGAR ↗
Q2 2022$293M13Aug 15, 202213F-HRchanges · EDGAR ↗
Q1 2022$680M14May 16, 202213F-HRchanges · EDGAR ↗
Q4 2021$882M14Feb 14, 202213F-HRchanges · EDGAR ↗
Q3 2021$551M14Nov 15, 202113F-HRchanges · EDGAR ↗
Q2 2021$385M15Aug 16, 202113F-HRchanges · EDGAR ↗
Q1 2021$553M17May 17, 202113F-HRchanges · EDGAR ↗
Q4 2020$481M17Feb 16, 202113F-HRchanges · EDGAR ↗
Q3 2020$945M17Nov 16, 202013F-HRchanges · EDGAR ↗
Q2 2020$496M14Aug 14, 202013F-HRchanges · EDGAR ↗
Q1 2020$257M14May 15, 202013F-HRchanges · EDGAR ↗
Q4 2019$266M12Feb 14, 202013F-HRchanges · EDGAR ↗
Q3 2019$142M11Nov 14, 201913F-HRchanges · EDGAR ↗
Q2 2019$288M13Aug 14, 201913F-HRchanges · EDGAR ↗
Q1 2019$226M14May 15, 201913F-HRchanges · EDGAR ↗

13F filings are due up to 45 days after quarter end, so holdings shown here lag the fund’s current book. Source: original SEC filing on EDGAR ↗.