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Equibles

SUSQUEHANNA INTERNATIONAL GROUP, LLP

Position in SPRO — Spero Therapeutics, Inc.

CIK 1446194 BALA CYNWYD, PA
Back to SPRO Full portfolio

Position in SPRO

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$1,678,030
+$898,542 QoQ
Shares Held
759,290
+127.9% QoQ
Ownership
1.30%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#6
of 59 holders
Holding Since
Jun 2020
24 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in SPRO Over Time

Shares Held

Position Value (USD)

Derivatives in SPRO

reported options exposure · as of Jun 30, 2026
CallValue
$30,277
CallShares
13,700
PutValue
$76,466
PutShares
34,600

Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.

Position in Biotechnology

Healthcare · as of Jun 30, 2026

SUSQUEHANNA INTERNATIONAL GROUP, LLP holds $1,653,301,875 across 349 Biotechnology names. SPRO ranks #91 (0.1% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 ABVX
Abivax S.A.
 1,053,896 $140,442,180
2 CYTK
Cytokinetics Inc
 1,549,458 $131,998,327
3 REGN
Regeneron Pharmaceuticals, Inc.
 180,219 $112,373,755
4 ALNY
Alnylam Pharmaceuticals, Inc.
 294,460 $88,641,293
5 MDGL
Madrigal Pharmaceuticals, Inc.
 148,610 $79,796,139
6 INSM
INSMED Inc
 729,354 $77,763,723
7 VRTX
Vertex Pharmaceuticals Inc / Ma
 144,174 $71,615,550
8 AGIO
Agios Pharmaceuticals, Inc.
 1,375,558 $51,046,957

All Filings in SPRO

Export CSV
43 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $30,277 13,700
2026-06-30 $1,678,030 759,290
2026-06-30 $76,466 34,600
2026-03-31 $113,490 48,500
2026-03-31 $779,488 333,115
2025-12-31 $684,321 293,700
2025-09-30 $20,492 10,900
2025-06-30 $141,230 48,700
2025-06-30 $202,460 69,814
2024-12-31 $30,647 29,755
2024-09-30 $59,253 44,219
2024-06-30 $29,994 23,073
2024-03-31 $33,712 19,600
2023-12-31 $26,586 18,086
2023-09-30 $24,421 20,183
2023-06-30 $64,320 44,359
2023-03-31 $38,488 26,544
2022-12-31 $39,271 22,700
2022-12-31 $112,623 65,100
2022-12-31 $87,622 50,649
2022-09-30 $138,572 69,286
2022-09-30 $55,600 27,800
2022-09-30 $247,800 123,900
2022-06-30 $40,121 54,145
2022-03-31 $583,630 67,084
2021-12-31 $240,150 15,000
2021-12-31 $1,203,679 75,183
2021-12-31 $376,235 23,500
2021-09-30 $745,605 40,500
2021-09-30 $731,760 39,748
2021-09-30 $616,735 33,500
2021-06-30 $339,228 24,300
2021-06-30 $410,424 29,400
2021-06-30 $578,753 41,458
2021-03-31 $241,408 16,400
2021-03-31 $775,744 52,700
2021-03-31 $1,018,373 69,183
2020-12-31 $519,652 26,800
2020-12-31 $1,436,372 74,078
2020-12-31 $763,966 39,400
2020-09-30 $302,436 27,100
2020-09-30 $640,673 57,408
2020-06-30 $544,582 40,250