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SION
NASDAQ Life Sciences

Institutional Investor Files Form 144 to Sell Over $8M in Sionna Therapeutics Stock

Analysis by Wiseek AI
Sentiment info
Negative
Importance info
7
Price
$42.31
Mkt Cap
$1.864B
52W Low
$7.255
52W High
$45
Market data snapshot near publication time

Summary

Rise Fund Sling, L.P., a significant stockholder, has filed a Form 144 indicating its intent to sell 195,667 shares of Sionna Therapeutics common stock, valued at approximately $8.17 million.


Key Events

  • Intent to Sell Shares

    Rise Fund Sling, L.P. filed a Form 144 to sell 195,667 shares of common stock.

  • Significant Transaction Value

    The proposed sale has an approximate market value of $8.17 million.

  • Prior Sales Activity

    This filing follows previous Forms 144 from related entities for an aggregate of 250,000 shares sold in the last three months.


Analysis

This Form 144 filing by Rise Fund Sling, L.P., an institutional stockholder, signals an intent to sell a substantial block of shares. While institutional sales can be for portfolio rebalancing, the proposed sale of over $8 million, combined with previous filings for aggregate sales of 250,000 shares in the past three months from related entities, suggests a notable reduction in their stake. This could create an overhang on the stock as the market absorbs the selling pressure.

At the time of this filing, SION was trading at $42.31 on NASDAQ in the Life Sciences sector, with a market capitalization of approximately $1.9B. The 52-week trading range was $7.26 to $45.00. This filing was assessed with negative market sentiment and an importance score of 7 out of 10.

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SION - Latest Insights

SION
Jun 01, 2026, 12:39 PM EDT
Filing Type: 144/A
Importance Score:
7
Price at Filing: $41.10
Real-time Price: $36.05 info
Change: -$5.05 (-12%) info
Market Cap: $1.628B info
SION
May 29, 2026, 6:44 PM EDT
Filing Type: 144
Importance Score:
7
Price at Filing: $42.82
Real-time Price: $36.05 info
Change: -$6.77 (-16%) info
Market Cap: $1.628B info
SION
May 12, 2026, 7:17 AM EDT
Filing Type: 10-Q
Importance Score:
7
Price at Filing: $45.95
Real-time Price: $36.05 info
Change: -$9.90 (-22%) info
Market Cap: $1.628B info
SION
May 12, 2026, 7:08 AM EDT
Filing Type: 8-K
Importance Score:
7
Price at Filing: $45.95
Real-time Price: $36.05 info
Change: -$9.90 (-22%) info
Market Cap: $1.628B info
SION
Apr 27, 2026, 7:00 AM EDT
Source: GlobeNewswire
Importance Score:
7
Price at Filing: $38.18
Real-time Price: $36.05 info
Change: -$2.13 (-6%) info
Market Cap: $1.628B info
SION
Apr 16, 2026, 7:15 PM EDT
Filing Type: 4
Importance Score:
7
Price at Filing: $45.24
Real-time Price: $36.05 info
Change: -$9.19 (-20%) info
Market Cap: $1.628B info
SION
Mar 02, 2026, 8:18 AM EST
Filing Type: S-3ASR
Importance Score:
7
Price at Filing: $36.54
Real-time Price: $36.05 info
Change: -$0.490 (-1%) info
Market Cap: $1.628B info
SION
Mar 02, 2026, 7:19 AM EST
Filing Type: 10-K
Importance Score:
7
Price at Filing: $36.54
Real-time Price: $36.05 info
Change: -$0.490 (-1%) info
Market Cap: $1.628B info
SION
Mar 02, 2026, 7:09 AM EST
Filing Type: 8-K
Importance Score:
8
Price at Filing: $36.54
Real-time Price: $36.05 info
Change: -$0.490 (-1%) info
Market Cap: $1.628B info
SION
Mar 02, 2026, 7:00 AM EST
Source: GlobeNewswire
Importance Score:
7
Price at Filing: $36.54
Real-time Price: $36.05 info
Change: -$0.490 (-1%) info
Market Cap: $1.628B info