Nuveen
SION

Nuveen’s Sionna Therapeutics SION Stock Holding History

Nuveen’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 		$1.81M Buy
41,259
+17,525
+74% +$701K ﹤0.01% 2626
2026
Q1 		$951K Hold
23,734
– – ﹤0.01% 2602
2025
Q4 		$976K Buy
23,734
+7,694
+48% +$292K ﹤0.01% 2626
2025
Q3 		$472K Hold
16,040
– – ﹤0.01% 2916
2025
Q2 		$278K Buy
+16,040
New +$210K ﹤0.01% 3084

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

Nuveen's SION Position: Q2 2026 in Review

Nuveen increased its Sionna Therapeutics (SION) stake by 74% in Q2 2026, buying an estimated $701K and bringing the position to 41,259 shares worth $1.81M. The position accounts for ﹤0.01% of the portfolio, ranked #2626.

Nuveen first reported a position in SION in Q2 2025 and has held it in 5 quarters since. 146 funds tracked by Wall St. Rank hold SION as of Q2 2026.

  • Nuveen held 41,259 shares of Sionna Therapeutics worth $1.81M as of Q2 2026.
  • Nuveen bought 17,525 Sionna Therapeutics shares in Q2 2026, an estimated $701K.
  • Sionna Therapeutics made up ﹤0.01% of Nuveen's portfolio in Q2 2026, its #2626 holding.
  • Nuveen first reported a position in Sionna Therapeutics in Q2 2025 and has held it in 5 quarters since.
  • 146 funds tracked by Wall St. Rank held Sionna Therapeutics as of Q2 2026.

Based on Nuveen's 13F filing for Q2 2026, filed 11 Aug 2026.