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RENAISSANCE TECHNOLOGIES LLC

Position in SPRO — Spero Therapeutics, Inc.

CIK 1037389 NEW YORK, NY

Position in SPRO

as of Jun 30, 2026 · filed Aug 13, 2026
Position Value
$2,094,867
-$687,942 QoQ
Shares Held
947,904
-20.3% QoQ
Ownership
1.63%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#4
of 59 holders
Holding Since
Mar 2020
21 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in SPRO Over Time

Shares Held

Position Value (USD)

Position in Biotechnology

Healthcare · as of Jun 30, 2026

RENAISSANCE TECHNOLOGIES LLC holds $3,950,489,724 across 311 Biotechnology names. SPRO ranks #130 (0.1% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in SPRO

Export CSV
21 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $2,094,867 947,904
2026-03-31 $2,782,809 1,189,235
2025-12-31 $2,981,286 1,279,522
2025-09-30 $2,731,198 1,452,765
2025-06-30 $2,413,278 832,165
2025-03-31 $699,053 970,907
2024-12-31 $1,138,758 1,105,591
2024-09-30 $1,306,035 974,653
2024-06-30 $1,268,737 975,952
2024-03-31 $1,469,671 854,460
2023-12-31 $804,773 547,465
2023-09-30 $662,069 547,165
2023-06-30 $860,474 593,431
2023-03-31 $594,935 410,300
2022-12-31 $593,217 342,900
2022-09-30 $429,400 214,700
2022-06-30 $695,811 939,017
2022-03-31 $949,170 109,100
2020-09-30 $1,709,745 153,203
2020-06-30 $4,463,587 329,903
2020-03-31 $2,620,368 324,303