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HEIGHTS CAPITAL MANAGEMENT, INC — 13F Holdings & Portfolio

CIK 1081698 · latest 13F-HR filed 2026-05-15

Backtest portfolio

HEIGHTS CAPITAL MANAGEMENT, INC manages $358.8M in 13F-reported U.S. long-equity assets across 265 reported positions as of its 2026-03-31 13F-HR filing. Its largest disclosed positions are SLDP (10.37%), FLUT (8.36%), IONQ (6.55%). Quarter over quarter (versus its 2025-12-31 filing) the fund opened 138 new positions, exited 65, added to 7, and trimmed 48.

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.

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AUM

$358.8M

Long-equity book

Holdings

265

Distinct positions

Period

2026-03-31

Filed 2026-05-15

Q/Q Activity

+138 / −65 / ↑7 / ↓48

vs 2025-12-31

Firm Profile & Key People
Name Title / Status Ownership Type

Top Adds (vs prior quarter)

  • BEST SPAC I ACQUISITION CORP$5.0K +19.0%
  • BIOVIE INC$4.8K +20.6%
  • QUANTUMSPHERE ACQUISITION CO$3.1K +9.7%
  • D. BORAL ARC ACQ I CORP.$2.4K +54.1%
  • FACT II ACQUISITION CORP$1.5K +14.3%
Show all 7 →

Top Trims

  • FLUTTER ENTMT PLC-$33.3M -52.6%
  • NYXOAH S A-$2.7M -74.8%
  • EMPERY DIGITAL INC-$335.0K -7.3%
  • GP-ACT III ACQUISITION CORP-$238.5K -5.4%
  • MELAR ACQUISITION CORP. I-$179.5K -32.4%
Show all 48 →

New Positions

  • SOLID POWER INC$37.2M
  • IONQ INC$23.5M
  • COMPASS PATHWAYS PLC$8.3M
  • SEALSQ CORP$8.2M
  • PONO CAP FOUR INC$5.5M
Show all 138 →

Exited Positions

  • DRUGS MADE IN AMER ACQ II CO$5.2M
  • CHURCHILL CAP CORP XI$5.1M
  • IRON HORSE ACQUISIT CORP II$4.7M
  • ABSCI CORPORATION$3.7M
  • TWELVE SEAS INVT CO III$3.5M
Show all 65 →
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 SOLID POWER INC SLDP 83422N105 $37.2M 10.37% 12,395,558 SH
2 FLUTTER ENTMT PLC FLUT G3643J108 $30.0M 8.36% 294,180 SH
3 IONQ INC IONQ 46222L108 $23.5M 6.55% 815,542 SH
4 COMPASS PATHWAYS PLC CMPS 20451W101 $8.3M 2.30% 1,492,415 SH
5 SEALSQ CORP LAES G79483106 $8.2M 2.29% 3,136,465 SH
6 FG MERGER II CORP FGMC 30334J102 $8.0M 2.22% 790,000 SH
7 JACKSON ACQUISITION CO II JACS G4992A110 $7.4M 2.07% 700,000 SH
8 DRUGS MADE IN AMER ACQUTN CO DMAA G2847J104 $6.8M 1.90% 650,000 SH
9 PONO CAP FOUR INC PONOU G71702123 $5.5M 1.53% 550,000 SH
10 M3BRIGADE ACQUISITION V CORP MBAV G63212107 $5.4M 1.50% 500,000 SH
11 DRUGS MADE IN AMER ACQ II CO DMII G2851K104 $5.2M 1.44% 519,400 SH
12 KOCHAV DEFENSE ACQUI CO KCHV G5304D106 $5.1M 1.43% 500,000 SH
13 BHAV ACQUISITION CORP BHAVU G1R59W127 $4.9M 1.38% 495,000 SH
14 XFLH CAP CORP XFLH.U G9834D123 $4.7M 1.32% 475,000 SH
15 IRON HORSE ACQUISIT II CORP IRHO 46283H103 $4.6M 1.29% 470,000 SH
16 NMP ACQUISITION CORP NMP G6375X104 $4.6M 1.27% 450,000 SH
17 CHURCHILL CAP CORP XI CCXI G2131A108 $4.6M 1.27% 448,176 SH
18 EMPERY DIGITAL INC EMPD 92864V608 $4.2M 1.18% 1,000,000 SH
19 GP-ACT III ACQUISITION CORP GPAT G4035N103 $4.2M 1.17% 388,719 SH
20 CANDEL THERAPEUTICS INC CADL 137404109 $3.8M 1.06% 775,000 SH
21 ARMADA ACQUISITION CORP III AACIU G0R38M127 $3.6M 1.02% 365,000 SH
22 FIFTH ERA ACQUISITION CORP I FERA G3415K101 $3.6M 1.00% 350,000 SH
23 EMMIS ACQUISITION CORP. EMIS G3037D105 $3.5M 0.98% 350,000 SH
24 FUTURE VISION II ACQUISITION FVN G37068106 $3.5M 0.98% 325,000 SH
25 TWELVE SEAS INVT CO III TWLV G9145D101 $3.5M 0.97% 350,000 SH
26 FLAG SHIP ACQUISITION CORP FSHP G3530C109 $3.3M 0.92% 302,347 SH
27 COPLEY ACQUISITION CORP COPL G24243100 $3.1M 0.86% 300,000 SH
28 AI INFRASTRUCTURE ACQUISI AIIA G01336109 $3.0M 0.84% 300,000 SH
29 NEWBRIDGE ACQUISITION LTD NBRGU G6464L110 $3.0M 0.84% 300,000 SH
30 HENNESSY CAP INVTS CORP VIII HCICU G44055112 $3.0M 0.84% 300,000 SH
31 FUTURE MONEY ACQUISITION COR FMACU G3700S124 $3.0M 0.83% 300,000 SH
32 BLEICHROEDER ACQUISITI CORP BBCQ G1170E104 $2.8M 0.78% 279,547 SH
33 PLUM ACQUISITION CORP IV PLMK G7134A104 $2.6M 0.74% 250,000 SH
34 THAYER VENTURES ACQ CORP II TVAI G87890102 $2.6M 0.71% 250,000 SH
35 ORIGIN INVT CORP I ORIQ G67751100 $2.6M 0.71% 249,900 SH
36 OXLEY BRIDGE ACQ LTD OBA G6858G107 $2.5M 0.71% 250,000 SH
37 MESHFLOW ACQUISITION CORP MESH G6032N101 $2.5M 0.69% 250,000 SH
38 CHAMPIONSGATE ACQUISITION CO CHPG G2124S108 $2.2M 0.61% 212,182 SH
39 LAKE SUPERIOR ACQUISITION CO LKSP G5354C107 $2.1M 0.59% 210,000 SH
40 LAKESHORE ACQUISITION III CO LCCC G5353S103 $2.1M 0.57% 200,000 SH
41 SIZZLE ACQUISITION CORP. II SZZL G8193F109 $2.1M 0.57% 200,000 SH
42 SOULPOWER ACQUISITION CORP SOUL G82745103 $2.0M 0.57% 200,000 SH
43 SPRING VY ACQUISITION CORP I SVIVU G8377G121 $2.0M 0.57% 200,000 SH
44 A PARADISE ACQUISITION CORP APAD G04819101 $2.0M 0.57% 199,600 SH
45 SILVER PEGASUS ACQUISITION C SPEG G8192J102 $2.0M 0.56% 199,100 SH
46 AA MISSION ACQUISITION CORP YCY G1000S109 $2.0M 0.56% 200,000 SH
47 CROWN RESV ACQUISITION CORP CRAC G2574F119 $2.0M 0.56% 200,000 SH
48 KRAKACQUISITION CORPORATION KRAQU G5315G122 $2.0M 0.56% 200,000 SH
49 DYNAMIX CORP III DNMX G2949T109 $2.0M 0.55% 200,000 SH
50 ARMADA ACQUISITION CORP II XRPN G0R38G104 $2.0M 0.55% 191,267 SH
Filing History
Period Filed AUM Holdings Accession
2026-03-31 2026-05-15 $358.8M 265 0001081698-26-000005
2025-12-31 2026-02-17 $278.8M 192 0001081698-26-000001
2025-09-30 2025-11-18 $351.0M 182 0001081698-25-000008