Polen Capital Management
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Polen Capital Management’s Sionna Therapeutics SION Stock Holding History

Polen Capital Management’s Portfolio SION Stock Details SION Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		– Sell
-26,775
Closed -$1.07M – 283
2026
Q1 		$1.07M Sell
26,775
-4,483
-14% -$171K 0.01% 141
2025
Q4 		$1.29M Hold
31,258
– – 0.01% 117
2025
Q3 		$919K Buy
31,258
+14,283
+84% +$311K ﹤0.01% 146
2025
Q2 		$295K Buy
+16,975
New +$222K ﹤0.01% 227

Other funds holding SION

RCM
RA Capital Management Boston, Massachusetts $11.5B AUM 168.77% 1-Year Est. Return
TGA
TPG GP A Fort Worth, Texas $5B AUM 58.56% 1-Year Est. Return
Viking Global Investors
Viking Global Investors Stamford, Connecticut $35.1B AUM 21.36% 1-Year Est. Return
AVLSA
Atlas Venture Life Science Advisors Cambridge, Massachusetts $881M AUM 160.77% 1-Year Est. Return
O
OrbiMed New York $5.4B AUM 163.13% 1-Year Est. Return
ES
Enavate Sciences Menlo Park, California $345M AUM 134.64% 1-Year Est. Return
Adage Capital Partners
Adage Capital Partners Boston, Massachusetts $71.3B AUM 56.8% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
Jennison Associates
Jennison Associates New York $167B AUM 44.17% 1-Year Est. Return

Polen Capital Management's SION Position: Q2 2026 in Review

Polen Capital Management sold out of Sionna Therapeutics (SION) in Q2 2026, closing a stake of 26,775 shares — an estimated $1.07M sold.

Polen Capital Management first reported a position in SION in Q2 2025 and held it in 4 quarters. The position peaked at $1.29M in Q4 2025. 146 funds tracked by Wall St. Rank hold SION as of Q2 2026.

  • Polen Capital Management reported no remaining Sionna Therapeutics position as of Q2 2026 after selling out during the quarter.
  • Polen Capital Management sold 26,775 Sionna Therapeutics shares in Q2 2026, an estimated $1.07M.
  • Polen Capital Management first reported a position in Sionna Therapeutics in Q2 2025 and held it in 4 quarters.
  • Polen Capital Management's Sionna Therapeutics position peaked at $1.29M in Q4 2025.
  • 146 funds tracked by Wall St. Rank held Sionna Therapeutics as of Q2 2026.

Based on Polen Capital Management's 13F filing for Q2 2026, filed 4 Aug 2026.