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SION
NASDAQ Life Sciences

OrbiMed Amends Plan to Sell $9 Million in Sionna Therapeutics Stock

Arie Shkolnikov · Analysis by Wiseek AI
More coverage: Biotech Stocks · Healthcare
Sentiment info
Negative
Importance info
7
Price
$41.1
Mkt Cap
$1.856B
52W Low
$13.255
52W High
$48.445
52W Position info
210% above low
Off High info
15% below high
Rel. Volume info
0.4× avg
Market data snapshot near publication time

SION has more than doubled off its 52-week low of $13.255.

Summary

OrbiMed, a major institutional investor, filed an amended Form 144 to sell $9.03 million in Sionna Therapeutics stock, continuing a pattern of significant share distribution.


Key Events · Ownership and Investor Activity · SION

  • Amended Intent to Sell Shares

    OrbiMed Private Investments VIII, LP, a major institutional investor, filed an amended Form 144 to sell 210,876 shares of common stock, valued at approximately $9.03 million.

  • Ongoing Share Distribution

    This filing is part of a broader pattern of share distribution by OrbiMed, which has already sold 858,981 shares for gross proceeds of $38.79 million over the past three months.


Analysis · SION · Life Sciences

OrbiMed Private Investments VIII, LP, a significant institutional investor, has filed an amended Form 144 indicating its intent to sell an additional $9.03 million worth of Sionna Therapeutics common stock. This follows previous filings and a pattern of substantial share distribution by OrbiMed, totaling over $38.7 million in sales over the past three months. This ongoing selling activity by a major shareholder could create an overhang on the stock.

At the time of this filing, SION was trading at $41.10 on NASDAQ in the Life Sciences sector, with a market capitalization of approximately $1.9B. The 52-week trading range was $13.26 to $48.45. This filing was assessed with negative market sentiment and an importance score of 7 out of 10.

View Main SEC Filing

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SION - Latest Insights

SION
May 29, 2026, 6:44 PM EDT
Filing Type: 144
Importance Score:
7
Price at Filing: $42.82
Real-time Price: $45.85 info
Change: +$3.03 (+7%) info
Market Cap: $2.063B info
SION
May 12, 2026, 7:17 AM EDT
Filing Type: 10-Q
Importance Score:
7
Price at Filing: $45.95
Real-time Price: $45.85 info
Change: -$0.100 (-0.22%) info
Market Cap: $2.063B info
SION
May 12, 2026, 7:08 AM EDT
Filing Type: 8-K
Importance Score:
7
Price at Filing: $45.95
Real-time Price: $45.85 info
Change: -$0.100 (-0.22%) info
Market Cap: $2.063B info
SION
Apr 27, 2026, 7:00 AM EDT
Source: GlobeNewswire
Importance Score:
7
Price at Filing: $38.18
Real-time Price: $45.85 info
Change: +$7.67 (+20%) info
Market Cap: $2.063B info
SION
Apr 16, 2026, 7:15 PM EDT
Filing Type: 4
Importance Score:
7
Price at Filing: $45.24
Real-time Price: $45.85 info
Change: +$0.610 (+1%) info
Market Cap: $2.063B info