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Plans & pricingDonateSpero Therapeutics, Inc. Common Stock
XNAS•Health Care•Pharmaceutical Preparations
Flagged at $1.23 at 09:17 AM on Sep 22, then ran to $1.44 +17% that session.
The high is the session peak after our first alert, not a realized trade. Not investment advice.
Why is SPRO up today? It is at $1.15 (+0.14%), and our scanner flagged it 63 times on unusual volume this month. See the catalyst behind the move, real-time alerts the moment SPRO spikes, and full due diligence on SPRO — key stats, earnings, dilution and insider activity. Free.
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Here is the latest on SPRO from our scanner (live price and day move above). We have not detected an unusual-volume catalyst for SPRO today, so it is trading in line with its recent range. The moment our scanner flags unusual activity, the reason will appear here.
Latest filingEFFECTRegistration declared effectiveSep 11, 2026 · 33 days ago| Insider | Action | Shares | % of position | Owns after | Value | Date |
|---|---|---|---|---|---|---|
Zack Debra Officer | Acquired (grant/award) | +162K 0.3% of company | n/a | 162K | n/a | Aug 3, 26 |
Pottage John C Jr Director | Acquired (grant/award) | +10K 0.02% of company | added 13% | 85K | n/a | Jun 23, 26 |
Jackson Scott Thomas Director | Acquired (grant/award) | +10K 0.02% of company | added 13% | 85K | n/a | Jun 23, 26 |
Thomas Frank E Director | Acquired (grant/award) | +10K 0.02% of company | added 13% | 85K | n/a | Jun 23, 26 |
Vink Patrick V.J.J. Director | Acquired (grant/award) | +10K 0.02% of company | added 13% | 85K | n/a | Jun 23, 26 |
Smith Cynthia Director | Acquired (grant/award) | +10K 0.02% of company | added 13% | 85K | n/a | Jun 23, 26 |
Tregoning Kathleen Director | Acquired (grant/award) | +10K 0.02% of company | added 13% | 85K | n/a | Jun 23, 26 |
Deshpande Milind Director | Acquired (grant/award) | +10K 0.02% of company | added 11% | 101K | n/a | Jun 23, 26 |
Rajavelu Esther Officer | Sold (automatic/other) | -25K 0.04% of company | sold 2.5% | 987K | $63K at $2.51 | May 4, 26 |
Keutzer Timothy Officer | Sold (automatic/other) | -19K 0.03% of company | sold 2.5% | 743K | $44K at $2.36 | Feb 6, 26 |
Rajavelu Esther Officer | Sold (automatic/other) | -88K 0.2% of company | sold 8.0% | 1.01M | $207K at $2.36 | Feb 6, 26 |
Keutzer Timothy Officer | Sold (automatic/other) | -3K | sold 0.5% | 761K | $8K at $2.24 | Feb 4, 26 |
Recent Form-4 filings via Nasdaq. Open-market buys are the signal worth watching. Grants and automatic (10b5-1) sells are routine. “% of position” is the share of that insider’s own holding the trade moved. Not investment advice.
Blend of news sentiment, today’s move, and community votes. Not investment advice.
News, unusual-volume alerts, AI-trader trades and community chatter - the whole story, newest first.
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Here is the latest on SPRO from our scanner (live price and day move above). We have not detected an unusual-volume catalyst for SPRO today, so it is trading in line with its recent range. The moment our scanner flags unusual activity, the reason will appear here.
SPRO last traded at $1.15, up 0.14% on the day. The price and chart above update live during market hours (4 AM to 8 PM ET).
Spero Therapeutics, Inc. Common Stock (SPRO) is next expected to report earnings on Thursday, November 12, 2026, about 29 days away. Earnings reports often cause large overnight gaps, so many traders manage risk around the date. The date can shift until the company officially confirms it.
The SPRO Live Alerts panel on this page streams real-time unusual volume (RVOL), momentum, halt and 200-EMA alerts from our scanner the moment they fire. Our scanner has flagged SPRO 63 times in the last 30 days.
SPRO (Spero Therapeutics, Inc. Common Stock) trades on XNAS, with a market cap of about $65M in the Pharmaceutical Preparations sector.
That depends on your strategy and risk. Day traders look for volume, volatility and a clear trend. Use the live chart, RVOL alerts and 200-EMA context on this page to judge SPRO for yourself. This is not investment advice.
Live data from TheDesperateTrader scanner. Not investment advice.
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