Funds · 13F filer · Boston, MA

Monashee Investment Management LLC

$54.2M in 20 U.S. stocks and ETFs at the end of June 30, 2026, as reported to the SEC.1

1y return+34.8%S&P 500 +20.9%
3y return+76.0%S&P 500 +68.5%
5y return+21.0%S&P 500 +74.5%

These returns are for its stock picks as disclosed on Form 13F: last quarter's holdings, valued at this quarter's prices. They miss trades within each quarter, short positions, options, bonds, cash and fees, so they aren't the returns its clients got.

$100 invested in its stock picks

Since December 31, 2018: $194 against $299 in the S&P 500.2

Monashee Investment Management LLCS&P 500 (SPY)
$95$100$29920182026

Top holdings

At the end of June 30, 2026. Change is in shares since the quarter before.2

StockValueShare of portfolioChange
Alphabet IncCUSIP 02079K404$5.1M9.4%New
Alphabet IncCUSIP 02079K602$5.0M9.3%New
SLDBSolid Biosciences Inc$5.0M9.2%−64.8%
DLRDigital Rlty Tr Inc$4.5M8.3%New
SYRESpyre Therapeutics Inc$4.4M8.2%New
ADTAdt Inc Del$3.9M7.2%−14.3%
TNGXTango Therapeutics Inc$3.1M5.8%New
Super Micro Computer IncCUSIP 86800U500$2.6M4.8%New
LEGNLegend Biotech Corp$2.5M4.6%New
GOOGLAlphabet Inc$2.1M4.0%New
GOOGAlphabet Inc$2.1M3.9%New
Uniqure NvCUSIP N90064101$2.1M3.8%New
Innio NvCUSIP N52A8C105$1.9M3.5%New
AKRAcadia Rlty Tr$1.8M3.3%New
PTRNPattern Group Inc$1.6M3.0%New
MLTXMoonlake Immunotherapeutics$1.5M2.7%New
WHKWhitehawk Minerals Corp$1.4M2.6%New
TSHATaysha Gene Therapies Inc$1.4M2.5%New
IMAImagenebio Inc$1.1M2.1%New
KARDKardigan Inc$1.0M1.9%New

Best picks still held

How each current holding has done since the quarter it first appeared in its filings (up to six years back).

StockHeld sinceReturn sinceNow worth
SLDBSolid Biosciences IncDecember 31, 2025+77.1%$5.0M
ADTAdt Inc DelMarch 31, 2025−20.1%$3.9M

Sold off last quarter

  • Terns Pharmaceuticals IncCUSIP 880881107 was $15.8M
  • Nextera Energy IncCUSIP 65339F655 was $15.2M
  • MDLNMedline Inc was $13.3M
  • NRGNrg Energy Inc was $12.4M
  • FPSForgent Power Solutions Inc was $10.2M
  • NKTRNektar Therapeutics was $7.2M
  • CYTKCytokinetics Inc was $6.6M
  • Joby Aviation IncCUSIP 47775AAA9 was $5.9M
  • Ppl CorpCUSIP 69351T866 was $5.2M
  • BBIOBridgebio Pharma Inc was $5.0M

Quarter by quarter

QuarterIts picksS&P 500
June 30, 2026+11.6%+14.8%
March 31, 2026−1.5%−4.6%
December 31, 2025+2.3%+2.4%
September 30, 2025+19.8%+7.8%
June 30, 2025+10.6%+10.5%
March 31, 2025−1.6%−4.6%
December 31, 2024−0.5%+2.1%
September 30, 2024+7.1%+5.4%
June 30, 2024−1.5%+4.0%
March 31, 2024+8.1%+10.0%
December 31, 2023+6.0%+11.2%
September 30, 2023−0.3%−3.6%
June 30, 2023+10.2%+8.3%
March 31, 2023+2.3%+7.0%
December 31, 2022+3.3%+7.1%
September 30, 2022−3.5%−5.3%
June 30, 2022−18.7%−16.5%
March 31, 2022−13.7%−4.9%
December 31, 2021−1.9%+10.7%
September 30, 2021−11.1%+0.3%

Sources

Every number on this page points here. Each one links to the public record.

  1. 1
    CIK 1627608
  2. 2
    Filed August 13, 2026 · accession 0001172661-26-003357