Hudson Bay Capital Management
CABA icon

Hudson Bay Capital Management’s Cabaletta Bio CABA Stock Holding History

Hudson Bay Capital Management’s Portfolio CABA Stock Details CABA Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$435K Buy
161,726
+22,997
+17% +$63.9K ﹤0.01% 995
2025
Q4 		$304K Buy
+138,729
New +$344K ﹤0.01% 917
2025
Q3 		– Sell
-13,070
Closed -$19.9K – 1279
2025
Q2 		$19.9K Buy
+13,070
New +$20.4K ﹤0.01% 1310

Other funds holding CABA

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BCLSI
Bain Capital Life Sciences Investors Boston, Massachusetts $1.11B AUM 171.34% 1-Year Est. Return
Jennison Associates
Jennison Associates New York $167B AUM 44.17% 1-Year Est. Return
Adage Capital Partners
Adage Capital Partners Boston, Massachusetts $64.8B AUM 42.7% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
CAM
Cormorant Asset Management Boston, Massachusetts $1.99B AUM 737.95% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Two Sigma Investments
Two Sigma Investments New York $124B AUM 33.93% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Marshall Wace
Marshall Wace London, United Kingdom $100B AUM 35.1% 1-Year Est. Return

Hudson Bay Capital Management's CABA Position: Q1 2026 in Review

Hudson Bay Capital Management increased its Cabaletta Bio (CABA) stake by 17% in Q1 2026, buying an estimated $63.9K and bringing the position to 161,726 shares worth $435K. The position accounts for ﹤0.01% of the portfolio, ranked #995.

Hudson Bay Capital Management first reported a position in CABA in Q2 2025 and has held it in 3 quarters since. 108 funds tracked by Wall St. Rank hold CABA as of Q1 2026.

  • Hudson Bay Capital Management held 161,726 shares of Cabaletta Bio worth $435K as of Q1 2026.
  • Hudson Bay Capital Management bought 22,997 Cabaletta Bio shares in Q1 2026, an estimated $63.9K.
  • Cabaletta Bio made up ﹤0.01% of Hudson Bay Capital Management's portfolio in Q1 2026, its #995 holding.
  • Hudson Bay Capital Management first reported a position in Cabaletta Bio in Q2 2025 and has held it in 3 quarters since.
  • 108 funds tracked by Wall St. Rank held Cabaletta Bio as of Q1 2026.

Based on Hudson Bay Capital Management's 13F filing for Q1 2026, filed 13 May 2026.