Arkolith/Insider Trading/SPRO

SPRO Insider Trading

Spero Therapeutics, Inc. · full profile →Last filing Jun 23, 2026
Net Selling · 180d
Open-Market Buys (180d)
$0
0 insiders
Open-Market Sells (180d)
$457K
2 insiders
Net Insider Flow
-$457K
open market, 180d
Reporting Insiders
2
8 P/S transactions
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Build on these Form 4 transactions

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Recent Form 4 Transactions

100 shown
DateInsiderRoleActionSharesPriceValue
Jun 23, 2026Deshpande MilindDirectorGrant(A)10K—$0
Jun 23, 2026Deshpande MilindDirectorGrant(A)20K—$0
Jun 23, 2026Jackson Scott ThomasDirectorGrant(A)10K—$0
Jun 23, 2026Jackson Scott ThomasDirectorGrant(A)20K—$0
Jun 23, 2026Smith CynthiaDirectorGrant(A)10K—$0
Jun 23, 2026Smith CynthiaDirectorGrant(A)20K—$0
Jun 23, 2026Thomas Frank EDirectorGrant(A)10K—$0
Jun 23, 2026Thomas Frank EDirectorGrant(A)20K—$0
Jun 23, 2026Vink Patrick V.J.J.DirectorGrant(A)10K—$0
Jun 23, 2026Vink Patrick V.J.J.DirectorGrant(A)20K—$0
Jun 23, 2026Tregoning KathleenDirectorGrant(A)10K—$0
Jun 23, 2026Tregoning KathleenDirectorGrant(A)20K—$0
Jun 23, 2026Pottage John C JrDirectorGrant(A)10K—$0
Jun 23, 2026Pottage John C JrDirectorGrant(A)20K—$0
May 4, 2026Rajavelu EstherSee RemarksSell(S)25K$2.51$63K
Feb 6, 2026Keutzer TimothyChief Operating OfficerSell(S)19K$2.36$44K
Feb 6, 2026Rajavelu EstherSee RemarksSell(S)37K$2.36$88K
Feb 6, 2026Rajavelu EstherSee RemarksSell(S)51K$2.36$120K
Feb 4, 2026Keutzer TimothyChief Operating OfficerSell(S)3K$2.24$8K
Feb 3, 2026Keutzer TimothyChief Operating OfficerSell(S)24K$2.14$52K
Feb 2, 2026Rajavelu EstherSee RemarksSell(S)18K$2.20$41K
Feb 2, 2026Rajavelu EstherSee RemarksGrant(A)249K—$0
Feb 2, 2026Rajavelu EstherSee RemarksGrant(A)498K—$0
Feb 2, 2026Keutzer TimothyChief Operating OfficerSell(S)19K$2.20$42K
Feb 2, 2026Keutzer TimothyChief Operating OfficerGrant(A)68K—$0
Feb 2, 2026Keutzer TimothyChief Operating OfficerGrant(A)137K—$0
Nov 7, 2025Rajavelu EstherSee RemarksSell(S)40K$2.37$95K
Aug 28, 2025Keutzer TimothyChief Operating OfficerSell(S)2K$1.97$3K
Aug 28, 2025Mahadevia AnkitDirectorSell(S)7K$1.97$13K
Jun 12, 2025Tregoning KathleenDirectorGrant(A)20K—$0
Jun 12, 2025Thomas Frank EDirectorGrant(A)20K—$0
Jun 12, 2025Smith CynthiaDirectorGrant(A)20K—$0
Jun 12, 2025Pottage John C JrDirectorGrant(A)20K—$0
Jun 12, 2025Vink Patrick V.J.J.DirectorGrant(A)20K—$0
Jun 12, 2025Jackson Scott ThomasDirectorGrant(A)20K—$0
Jun 12, 2025Deshpande MilindDirectorGrant(A)20K—$0
Jun 12, 2025Mahadevia AnkitDirectorGrant(A)20K—$0
May 2, 2025Rajavelu EstherSee RemarksGrant(A)185K—$0
Feb 5, 2025Mahadevia AnkitDirectorSell(S)14K$0.78$11K
Feb 5, 2025Mahadevia AnkitDirectorSell(S)55K$0.78$43K
Feb 5, 2025Shukla SathCEO & PresidentSell(S)106K$0.78$83K
Feb 5, 2025Shukla SathCEO & PresidentSell(S)43K$0.78$33K
Feb 5, 2025Shukla SathCEO & PresidentSell(S)6K$0.78$5K
Feb 5, 2025Rajavelu EstherCFO & CBOSell(S)21K$0.78$16K
Feb 5, 2025Keutzer TimothyChief Operating OfficerSell(S)25K$0.78$19K
Feb 5, 2025Keutzer TimothyChief Operating OfficerSell(S)28K$0.78$22K
Feb 5, 2025Keutzer TimothyChief Operating OfficerSell(S)4K$0.78$3K
Feb 3, 2025Shukla SathCEO & PresidentGrant(A)751K—$0
Feb 3, 2025Rajavelu EstherCFO & CBOGrant(A)100K—$0
Feb 3, 2025Rajavelu EstherCFO & CBOGrant(A)266K—$0
Feb 3, 2025Keutzer TimothyChief Operating OfficerGrant(A)266K—$0
Nov 8, 2024Rajavelu EstherCFO & CBOSell(S)17K$1.30$22K
Nov 7, 2024Rajavelu EstherCFO & CBOSell(S)23K$1.31$31K
Aug 27, 2024Shukla SathCEO & PresidentSell(S)3K$1.35$4K
Aug 27, 2024Keutzer TimothyChief Operating OfficerSell(S)2K$1.35$3K
Aug 27, 2024Mahadevia AnkitDirectorSell(S)6K$1.35$8K
Aug 5, 2024Shukla SathCEO and PresidentSell(S)18K$1.31$23K
Aug 2, 2024Shukla SathCEO and PresidentSell(S)15K$1.32$20K
May 29, 2024Pottage John C JrDirectorGrant(A)20K—$0
May 29, 2024Thomas Frank EDirectorGrant(A)20K—$0
May 29, 2024Smith CynthiaDirectorGrant(A)20K—$0
May 29, 2024Vink Patrick V.J.J.DirectorGrant(A)20K—$0
May 29, 2024Tregoning KathleenDirectorGrant(A)20K—$0
May 29, 2024Mahadevia AnkitDirectorGrant(A)20K—$0
May 29, 2024Jackson Scott ThomasDirectorGrant(A)20K—$0
May 29, 2024Deshpande MilindDirectorGrant(A)20K—$0
Feb 5, 2024Shukla SathCEO and President, DirectorSell(S)45K$1.45$65K
Feb 2, 2024Shukla SathCEO and President, DirectorSell(S)31K$1.37$42K
Feb 2, 2024Hamed KamalChief Medical OfficerSell(S)28K$1.37$38K
Feb 2, 2024Joseph Tamara LChief Legal OfficerSell(S)31K$1.37$42K
Feb 2, 2024Mahadevia AnkitDirectorSell(S)64K$1.37$87K
Feb 2, 2024Keutzer TimothyChief Operating OfficerSell(S)31K$1.36$42K
Feb 1, 2024Shukla SathCEO and President, DirectorGrant(A)680K—$0
Feb 1, 2024Rajavelu EstherSee RemarksGrant(A)120K—$0
Feb 1, 2024Hamed KamalChief Medical OfficerGrant(A)240K—$0
Feb 1, 2024Joseph Tamara LChief Legal OfficerGrant(A)240K—$0
Feb 1, 2024Keutzer TimothyChief Operating OfficerGrant(A)240K—$0
Jan 2, 2024Tregoning KathleenDirectorGrant(A)36K$1.12$40K
Nov 13, 2023Rajavelu EstherSee RemarksGrant(A)300K—$0
Oct 5, 2023Mahadevia AnkitDirectorGrant(A)20K—$0
Oct 5, 2023Jackson Scott ThomasDirectorGrant(A)20K—$0
Oct 5, 2023Vink Patrick V.J.J.DirectorGrant(A)20K—$0
Oct 5, 2023Tregoning KathleenDirectorGrant(A)20K—$0
Oct 5, 2023Deshpande MilindDirectorGrant(A)20K—$0
Oct 5, 2023Thomas Frank EDirectorGrant(A)20K—$0
Oct 5, 2023Smith CynthiaDirectorGrant(A)20K—$0
Oct 5, 2023Pottage John C JrDirectorGrant(A)20K—$0
Sep 13, 2023Hamed KamalChief Medical OfficerSell(S)39K$1.27$50K
Aug 29, 2023Shukla SathCEO and President, DirectorSell(S)4K$1.30$5K
Aug 28, 2023Shukla SathCEO and President, DirectorSell(S)2K$1.26$2K
Aug 28, 2023Mahadevia AnkitDirectorSell(S)9K$1.26$11K
Aug 28, 2023Joseph Tamara LChief Legal OfficerSell(S)2K$1.26$2K
Aug 28, 2023Keutzer TimothyChief Development OfficerSell(S)2K$1.26$2K
Aug 1, 2023Shukla SathCEO and President, DirectorGrant(A)266K—$0
Jun 12, 2023Hamed KamalChief Medical OfficerGrant(A)140K—$0
Feb 3, 2023Mahadevia AnkitCEO and President, DirectorSell(S)12K$1.81$22K
Feb 2, 2023Shukla SathChief Financial OfficerSell(S)10K$1.83$17K
Feb 2, 2023Joseph Tamara LChief Legal OfficerSell(S)3K$1.86$6K
Feb 2, 2023Keutzer TimothyChief Operating OfficerSell(S)3K$1.86$6K
Feb 1, 2023Mahadevia AnkitCEO and President, DirectorGrant(A)532K—$0

Data Source

Insider transactions sourced from SEC EDGAR Form 4 filings, normalized within minutes of acceptance. "Buy"/"Sell" mark open-market transactions (codes P/S), the tradeable signal. Awards, option exercises and tax-withholding are shown with their raw code. All data is public domain.

Coverage: Form 4 filings indexed 2021-03-29 → 2026-07-13. Earlier history is backfilling; this window widens as it deepens.

Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).