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Equibles

XTX Topco Ltd

Position in SPRO — Spero Therapeutics, Inc.

CIK 1828301 LONDON, X0
Back to SPRO Full portfolio

Position in SPRO

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$111,684
+$76,327 QoQ
Shares Held
50,536
+233.0% QoQ
Ownership
0.087%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#28
of 59 holders
Holding Since
Mar 2022
12 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

XTX Topco Ltd holds $414,894,447 across 381 Biotechnology names. SPRO ranks #269 (0.0% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 REGN
Regeneron Pharmaceuticals, Inc.
 30,522 $19,031,687
2 ASND
Ascendis Pharma A/S
 43,289 $11,546,042
3 BBIO
BridgeBio Pharma, Inc.
 116,611 $8,685,187
4 MRNA
Moderna, Inc.
 123,281 $8,633,368
5 JAZZ
Jazz Pharmaceuticals plc
 30,496 $7,348,621
6 KYMR
Kymera Therapeutics, Inc.
 61,501 $7,052,319
7 CYTK
Cytokinetics Inc
 80,743 $6,878,496
8 PTCT
Ptc Therapeutics, Inc.
 81,923 $6,682,459

All Filings in SPRO

Export CSV
12 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $111,684 50,536
2025-12-31 $35,357 15,175
2025-09-30 $63,545 33,801
2025-06-30 $100,197 34,551
2024-12-31 $31,042 30,138
2024-03-31 $25,822 15,013
2023-12-31 $96,970 65,966
2023-09-30 $70,625 58,368
2023-06-30 $154,256 106,384
2023-03-31 $173,798 119,861
2022-12-31 $599,849 346,734
2022-03-31 $115,362 13,260