Spero Therapeutics, Inc. Common Stock (SPRO)

Typically moves ±5.60% on earnings
EARNINGS ANALYTICS
event_upcoming Est. Next Earnings: 2026-11-13 ESTIMATED
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Spero Therapeutics, Inc. Common Stock (SPRO) has reported earnings 21 times since Aug 05, 2021. The stock moves an average of ±5.60% the day after reporting, closing higher 33.3% of the time. Its largest post-earnings gain was +13.37% (May 13, 2026) and its largest decline was -18.67% (Mar 31, 2022). The next earnings report is predicted for 2026-11-13 (estimated).

Earnings reactions

How SPRO moved on each past earnings report.

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Earnings Impact

Total Earnings

21

Avg Abs. Movement

±5.60%

Positive %

33.3%

Negative %

66.7%

Historical Earnings Statistics

Date Timing Earnings move SEC Filing
Aug 12, 2026 ☽ POST +1.65% open_in_new
May 13, 2026 ☽ POST +13.37% open_in_new
Mar 26, 2026 ☽ POST -1.69% open_in_new
Nov 13, 2025 ☽ POST -2.04% open_in_new
event

Earnings Count

21

Total earnings in dataset

trending_up

Avg Abs. Movement

±5.60%

Avg % price change on earnings

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SEC Filings

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Browse all SEC filings

account_balance

Institutional ownership

Holdings as of Jun 30, 2026 · SEC 13-F

View all 18 →
18
Funds holding
$31867716
Total value held
Buying
9 added · 2 reduced
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SEC Filing Types

Recent SEC Filings

10 most recent
Form Date Filed View on EDGAR
8-K 20260828 open_in_new SEC.gov
S-3 20260828 open_in_new SEC.gov
10-Q 20260812 open_in_new SEC.gov
8-K 20260812 open_in_new SEC.gov
3 20260806 open_in_new SEC.gov
4 20260806 open_in_new SEC.gov
8-K 20260714 open_in_new SEC.gov
4 20260625 open_in_new SEC.gov
4 20260625 open_in_new SEC.gov
4 20260625 open_in_new SEC.gov

Frequently asked about SPRO earnings

When does Spero Therapeutics, Inc. Common Stock report earnings next? expand_more

Spero Therapeutics, Inc. Common Stock (SPRO)'s next earnings date is estimated for 2026-11-13. This is a prediction based on its historical quarterly reporting pattern, not a company-confirmed date.

How much does SPRO stock move after earnings? expand_more

Over 21 reports, SPRO has moved an average of ±5.60% the session after earnings, closing higher 33.3% of the time.

What was SPRO's biggest post-earnings move? expand_more

SPRO's largest post-earnings gain on record was +13.37% on May 13, 2026, and its largest decline was -18.67% on Mar 31, 2022.

Where can I find Spero Therapeutics, Inc. Common Stock's SEC filings? expand_more

All of Spero Therapeutics, Inc. Common Stock's SEC filings — 10-K, 10-Q, 8-K and more — are listed in the SEC filings section on this page, each linking to the original document on SEC.gov.

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