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Equibles

FMR LLC

Position in SPRO — Spero Therapeutics, Inc.

CIK 315066 BOSTON, MA
Back to SPRO Full portfolio

Position in SPRO

as of Jun 30, 2026 · filed Aug 13, 2026
Position Value
$663
-$371 QoQ
Shares Held
300
-45.5% QoQ
Ownership
0.001%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#52
of 59 holders
Holding Since
Mar 2020
16 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

FMR LLC holds $61,908,415,112 across 370 Biotechnology names. SPRO ranks #335 (0.0% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 ARGX
Argenx SE
 5,231,452 $4,853,584,218
2 ALNY
Alnylam Pharmaceuticals, Inc.
 15,023,962 $4,522,663,276
3 MRNA
Moderna, Inc.
 51,859,891 $3,631,748,165
4 ROIV
Roivant Sciences Ltd.
 81,020,390 $2,867,311,601
5 RVMD
Revolution Medicines, Inc.
 12,200,422 $2,284,895,029
6 IONS
Ionis Pharmaceuticals Inc
 24,631,956 $1,953,067,789
7 INSM
INSMED Inc
 16,143,583 $1,721,228,815
8 KRYS
Krystal Biotech, Inc.
 4,418,197 $1,642,111,277

All Filings in SPRO

Export CSV
16 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $663 300
2025-09-30 $1,034 550
2025-03-31 $3,640 5,056
2024-12-31 $4,417 4,289
2024-09-30 $4,206 3,139
2024-06-30 $3,755 2,889
2024-03-31 $4,109 2,389
2023-12-31 $277 189
2023-06-30 $5 4
2022-06-30 $3,052 4,120
2022-03-31 $896 103
2021-03-31 $125,885 8,552
2020-12-31 $165,823 8,552
2020-09-30 $119,992 10,752
2020-06-30 $563,551 41,652
2020-03-31 $799,532 98,952