The page is the record's research on the issuer — no analyst, no rating, no view. # Spero Therapeutics, Inc. (NASDAQ: SPRO) — research page As of 2026-11-08 · us-cm-kg · record version 1 ## Identity and listing The issuer is Spero Therapeutics, Inc., listed on NASDAQ under ticker SPRO, ISIN US84833T1034, LEI 54930074G13LHWJT2323. The security type is Corporate and the sector is 2834 Pharmaceutical Preparations. The jurisdiction is United States, Delaware. The segment is not on the record. The listing status is listed, not halted. ## The disclosure read The record holds 38 filings in the window 2025-11-08 to 2026-11-08, across 22 filing days. The median gap between filing days is 13 days. The latest filing is dated 2026-10-28, a regulatory filing, 11 days before the record date of 2026-11-08. The NASDAQ median is 52 filings, a median cadence gap of 6.0 days, and a median latency of 5.0 days. The 2834 Pharmaceutical Preparations sector median is 63.0 filings, a median cadence gap of 6.0 days, and a median latency of 4.0 days. ## Auditor The auditor of record is not on the record, because the latest annual report cover carries no dei:AuditorName tag. The auditor's location is not on the record. The record holds no auditor changes. ## Events and halts The record holds no listing, delisting or name change lines. The domicile change is not on the record, as EDGAR states no dated change of state of incorporation on a filing line. The segment move is not on the record, as the exchanges' tier transfers are not EDGAR filings. The halt flag reads listed, not halted. ## Orderability The outcome is not determinable, because the chapter's orderability section carries no client categories and so the outcome cannot name its client category. The rule version is acm-68000/us/reasonable-basis-suitability-finra-rule-2111/r1, and the chapter is as of 2026-11-04. ## Coverage No research houses were found on the issuer's investor-relations page as read. The count is 0. ## Open research No openly published research notes were found. The count is 0. ## Licensed Licensed research: none loaded. A licensed row is served only to an agent whose firm holds that licence (licensor, entitlement). No licensed row is loaded. ## As-of depth The issuer's years sealed are 2021, 2022, 2023, 2024, 2025 and 2026. The market's earliest sealed date is 2021-01-04. The live record began on 2026-09-12. ## Sources 8 source pages are named on this page; every value above carries its own source page and read date in the numbers. - https://www.sec.gov/files/company_tickers_exchange.json (identity.exchange) - https://mapping.gleif.org/api/v2/isin-lei/latest (identity.isin) - https://data.sec.gov/submissions/CIK0001701108.json (identity.jurisdiction) - https://mapping.gleif.org/api/v2/isin-lei/latest/download (identity.lei) - https://mcp.us-cm-kg.ai/events/NASDAQ/SPRO (the disclosure lines) - https://www.nasdaqtrader.com/rss.aspx?feed=tradehalts (the halt flag) - https://mcp.us-cm-kg.ai/book/aio.json (the orderability chapter) - https://mcp.us-cm-kg.ai/record/NASDAQ/SPRO (the record) --- Allooloo Technologies Corp. · https://getresearch.ai/us/NASDAQ/SPRO · public-record only · the same page signed and receipted: get_research at https://mcp.getissuer.ai/mcp