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Decagon Asset Management LLP — 13F Holdings & Portfolio

CIK 1950677 · latest 13F-HR filed 2026-08-14

Backtest portfolio

Decagon Asset Management LLP manages $524.7M in 13F-reported U.S. long-equity assets across 104 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are NSC (11.05%), ROKU (10.36%), PEN (8.54%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 45 new positions, exited 18, added to 39, and trimmed 11.

AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.

Filer Information
Address
5 SWALLOW PLACE
LONDON, X0 W1B 2AF
Phone
442031482244
Filing Manager
Decagon Asset Management LLP
LONDON, X0
Signatory
Olivia Cooper
Chief Operating Officer
Loading holdings…
AUM

$524.7M

Long-equity book

Holdings

104

Distinct positions

Period

2026-06-30

Filed 2026-08-14

Q/Q Activity

+45 / −18 / ↑39 / ↓11

vs 2026-03-31

Firm Profile & Key People
Name Title / Status Ownership Type

Top Adds (vs prior quarter)

  • HELIX ACQUISITION CORP III$3.0M +37.0%
  • COLOMBIER ACQUISITION CORP I$2.2M +14.5%
  • NEW AMER ACQUISITION I CORP$1.2M +13.9%
  • OAKTREE ACQUISITION CORP III$1.1M +10.1%
  • APEX TECH ACQUISITION INC$1.1M +10.5%
Show all 39 →

Top Trims

  • PENUMBRA INC-$10.2M -18.5%
  • NORFOLK SOUTHN CORP-$4.0M -6.5%
  • XFLH CAP CORP-$1.0M -25.0%
  • M EVO GBL ACQUISITION CORP I-$929.1K -10.5%
  • SBC MED GROUP HLDGS INC-$42.5K -16.4%
Show all 11 →

New Positions

  • ROKU INC$54.4M
  • SELECT MED HLDGS CORP$44.8M
  • BIO-TECHNE CORP$39.9M
  • LIONHEART HOLDINGS$16.2M
  • VIKING ACQUISITION CORP I$13.6M
Show all 45 →

Exited Positions

  • ELECTRONIC ARTS INC$27.2M
  • CLEARWATER ANALYTICS HLDGS I$26.9M
  • HOLOGIC INC$20.8M
  • MISTER CAR WASH INC$20.4M
  • MASTERBRAND INC$12.9M
Show all 18 →
All Holdings

Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).

# Issuer Symbol CUSIP Value Weight Shares Type
1 NORFOLK SOUTHN CORP NSC 655844108 $58.0M 11.05% 184,363 SH
2 ROKU INC ROKU 77543R102 $54.4M 10.36% 393,636 SH
3 PENUMBRA INC PEN 70975L107 $44.8M 8.54% 142,001 SH
4 SELECT MED HLDGS CORP SEM 81619Q105 $44.8M 8.54% 2,715,536 SH
5 BIO-TECHNE CORP TECH 09073M104 $39.9M 7.60% 564,664 SH
6 COLOMBIER ACQUISITION CORP I CLBR G2284A103 $17.1M 3.27% 1,672,035 SH
7 LIONHEART HOLDINGS CUB G5501C109 $16.2M 3.08% 1,500,000 SH
8 WARNER BROS DISCOVERY INC Put WBD 934423104 $13.9M 2.66% 523,200 SH
9 VIKING ACQUISITION CORP I VACI G9582G104 $13.6M 2.59% 1,330,620 SH
10 QUANTUM LEAP ACQUISITION COR QLEP G73167101 $12.0M 2.28% 1,204,380 SH
11 OAKTREE ACQUISITION CORP III OACC G6717R104 $11.7M 2.23% 1,091,327 SH
12 APEX TECH ACQUISITION INC TRAD.U G0R21F121 $11.2M 2.13% 1,101,744 SH
13 HELIX ACQUISITION CORP III HLXC G4444S107 $11.1M 2.12% 1,044,766 SH
14 ARCHIMEDES TECH SPAC PARTNER ATII G04537109 $10.1M 1.93% 937,829 SH
15 NEW AMER ACQUISITION I CORP NWAX 023634108 $10.1M 1.93% 995,209 SH
16 GALAXYEDGE ACQUISITION CORP GLED G3710B103 $9.8M 1.88% 990,000 SH
17 BHAV ACQUISITION CORP BHAV G1R59W101 $9.8M 1.87% 990,000 SH
18 QUASAREDGE ACQUISITION CORP QRED G7315L101 $9.8M 1.87% 990,000 SH
19 JAB ACQUISITION CORP I JABRU G50004129 $9.1M 1.74% 908,000 SH
20 BIO-TECHNE CORP Call TECH 09073M104 $9.1M 1.73% 128,600 SH
21 STARLINK AI ACQUISITION CORP OTAI G8443M102 $9.0M 1.72% 913,770 SH
22 GIGCAPITAL9 CORP GIX G3865B114 $8.5M 1.61% 851,940 SH
23 DYNAMIX CORP DYNC G2949D104 $8.3M 1.58% 766,533 SH
24 M EVO GBL ACQUISITION CORP I MEVO G6071J102 $7.9M 1.51% 798,398 SH
25 PONO CAP FOUR INC PONO G71702107 $7.4M 1.41% 743,610 SH
26 KARBON CAP PARTNERS CORP KBON G5225W100 $7.3M 1.39% 720,284 SH
27 ALPEX ACQUISITION CORP ALPXU G63325123 $7.0M 1.34% 702,988 SH
28 KOCHAV DEFENSE ACQUI CO KCHV G5304D106 $7.0M 1.33% 672,619 SH
29 PLUTONIAN ACQUISITION CORP I PLUN.U G71382124 $5.9M 1.13% 585,000 SH
30 METALS ACQUISITION CORP II MTAL G60420109 $4.4M 0.83% 431,397 SH
31 TGE VALUE CREATIVE SOLUTIONS BEBE G8773E100 $4.3M 0.83% 435,172 SH
32 FUTURE MONEY ACQUISITION COR FMAC G3700S108 $4.2M 0.81% 425,128 SH
33 KEYSTONE ACQUISITION CORP KEYYU G52539114 $3.8M 0.72% 375,000 SH
34 AMPERCAP ACQUISITION CO APMC G0344N107 $3.5M 0.66% 351,990 SH
35 XFLH CAP CORP XFLH G9834D107 $3.1M 0.60% 315,238 SH
36 WEST ENCLAVE MERGER CORP WENC G9600E107 $2.7M 0.51% 271,780 SH
37 FORTUNEX ACQUISITION CORP FXACU G3645W123 $1.6M 0.31% 163,412 SH
38 SPACE ASSET ACQUISITION CORP SAAQ G8375S101 $1.6M 0.30% 154,900 SH
39 SYNAPTICS INC SYNA 87157D109 $1.2M 0.24% 10,000 SH
40 ARCHIMEDES TECH SPAC PARTNER ATIIW G04537125 $725.5K 0.14% 331,302 SH
41 NEWHOLD INVT CORP III NHICW G6486E110 $701.5K 0.13% 334,030 SH
42 IDEA ACQUISITION CORP IACO G4727U100 $638.6K 0.12% 64,442 SH
43 ORGANON & CO Call OGN 68622V106 $618.8K 0.12% 45,700 SH
44 NEW AMER ACQUISITION I CORP NWAX.WS 023634116 $289.7K 0.06% 482,764 SH
45 HALL CHADWICK ACQUISITION CO HCACR G42386113 $285.9K 0.05% 985,911 SH
46 GSR IV ACQUISITION CORP GSRFR G4R12K115 $262.8K 0.05% 109,028 SH
47 QUASAREDGE ACQUISITION CORP QREDR G7315L119 $247.5K 0.05% 990,000 SH
48 KOCHAV DEFENSE ACQUI CO KCHVR G5304D114 $244.8K 0.05% 1,212,059 SH
49 EGH ACQUISITION CORP. EGHAR G2946P118 $242.7K 0.05% 646,873 SH
50 AXIOM INTELLIGENCE AC CORP 1 AXINR G0750N112 $230.9K 0.04% 613,660 SH
Filing History
Period Filed AUM Holdings Accession
2026-06-30 2026-08-14 $524.7M 104 0001950677-26-000023
2026-03-31 2026-05-15 $386.2M 77 0001950677-26-000010
2025-12-31 2026-02-17 $260.1M 57 0001950677-26-000002
2025-09-30 2025-11-14 $198.1M 59 0001950677-25-000007