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SPRO

Spero Therapeutics, Inc.

NASDAQ · Healthcare · Biotechnology · US

$1.21
−0.82%
Ask drillr
0
Insider buys (3m)
0
Insider sells (3m)
$0.00
Net value (3m)
-57.3%
Price return (3m)
Form 4 filings
DateInsiderActivitySharesPrice
Aug 6, 2026Zack Debra · officer: Chief Medical OfficerA-Award162,311$0.00
Aug 6, 2026Zack Debra · officer: Chief Medical OfficerA-Award324,675$1.54
Jun 25, 2026Smith Cynthia · directorA-Award10,000$0.00
Jun 25, 2026Tregoning Kathleen · directorA-Award20,000$2.15
Jun 25, 2026Tregoning Kathleen · directorA-Award10,000$0.00
Jun 25, 2026Deshpande Milind · directorA-Award20,000$2.15
Jun 25, 2026Deshpande Milind · directorA-Award10,000$0.00
Jun 25, 2026VINK PATRICK V.J.J. · directorA-Award10,000$0.00
Jun 25, 2026Smith Cynthia · directorA-Award20,000$2.15
Jun 25, 2026Pottage John C Jr · directorA-Award20,000$2.15
Jun 25, 2026Pottage John C Jr · directorA-Award10,000$0.00
Jun 25, 2026Jackson Scott Thomas · directorA-Award20,000$2.15
Jun 25, 2026Jackson Scott Thomas · directorA-Award10,000$0.00
Jun 25, 2026THOMAS FRANK E · directorA-Award20,000$2.15
Jun 25, 2026THOMAS FRANK E · directorA-Award10,000$0.00
Jun 25, 2026VINK PATRICK V.J.J. · directorA-Award20,000$2.15
May 6, 2026Rajavelu Esther · officer: See RemarksSale25,240$2.51
Feb 9, 2026Keutzer Timothy · officer: Chief Operating OfficerSale18,652$2.36
Feb 9, 2026Rajavelu Esther · officer: See RemarksSale50,816$2.36
Feb 9, 2026Rajavelu Esther · officer: See RemarksSale37,101$2.36
Feb 5, 2026Keutzer Timothy · officer: Chief Operating OfficerSale3,471$2.24
Feb 5, 2026Keutzer Timothy · officer: Chief Operating OfficerA-Award68,000$0.00
Feb 5, 2026Keutzer Timothy · officer: Chief Operating OfficerSale18,891$2.20
Feb 5, 2026Keutzer Timothy · officer: Chief Operating OfficerSale24,224$2.14
Feb 5, 2026Keutzer Timothy · officer: Chief Operating OfficerA-Award137,000$2.23
Feb 4, 2026Rajavelu Esther · officer: See RemarksSale18,442$2.20
Feb 4, 2026Rajavelu Esther · officer: See RemarksA-Award249,000$0.00
Feb 4, 2026Rajavelu Esther · officer: See RemarksA-Award498,000$2.23
Nov 12, 2025Rajavelu Esther · officer: See RemarksSale40,270$2.37
Sep 3, 2025Keutzer Timothy · officer: Chief Operating OfficerSale1,695$1.97
Institutional positioning

13F filings over the trailing two quarters

New 8Increased 12Reduced 12Sold out 50
FilerActionSharesFiled
GSK PLCUnchanged9,190,606May 14, 2026
PFIZER INCUnchanged2,362,348May 12, 2026
VANGUARD CAPITAL MANAGEMENT LLCNew Position1,799,880May 15, 2026
RENAISSANCE TECHNOLOGIES LLCReduced1,189,235May 14, 2026
ALPHABET INC.Unchanged889,979May 8, 2026
TWO SIGMA INVESTMENTS, LPIncreased885,631May 15, 2026
GEODE CAPITAL MANAGEMENT, LLCReduced519,922May 15, 2026
BLACKROCK, INC.Reduced433,202May 13, 2026
CITADEL ADVISORS LLCReduced425,658May 15, 2026
ANSON FUNDS MANAGEMENT LPReduced421,956May 19, 2026
SUSQUEHANNA INTERNATIONAL GROUP, LLPIncreased381,615May 15, 2026
GSA CAPITAL PARTNERS LLPIncreased278,304May 8, 2026
VANGUARD FIDUCIARY TRUST CONew Position264,115May 8, 2026
STATE STREET CORPIncreased214,751May 15, 2026
IONIC CAPITAL MANAGEMENT LLCUnchanged195,939May 15, 2026

Insider activity from SEC Form 4; institutional positioning from 13F filings · Latest filing Aug 6, 2026