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HEIGHTS CAPITAL MANAGEMENT, INC — 13F Holdings & Portfolio

CIK 1081698 · latest 13F-HR filed 2026-08-14

Backtest portfolio

HEIGHTS CAPITAL MANAGEMENT, INC manages $433.1M in 13F-reported U.S. long-equity assets across 323 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are FLUT (6.94%), AMC (5.53%), MGTX (2.65%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 165 new positions, exited 106, added to 16, and trimmed 50.

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
101 CALIFORNIA STREET
SUITE 3250
SAN FRANCISCO, CA 94111
Phone
(415) 403-6550
Filing Manager
HEIGHTS CAPITAL MANAGEMENT, INC
SAN FRANCISCO, CA
Signatory
Brian Sopinsky
Assistant Secretary
Loading holdings…
AUM

$433.1M

Long-equity book

Holdings

323

Distinct positions

Period

2026-06-30

Filed 2026-08-14

Q/Q Activity

+165 / −106 / ↑16 / ↓50

vs 2026-03-31

Firm Profile & Key People
Name Title / Status Ownership Type

Top Adds (vs prior quarter)

  • AMPLITECH GROUP INC$2.4M +2776.9%
  • AMPLITECH GROUP INC$1.7M +2293.4%
  • NYXOAH S A$499.9K +55.5%
  • JACKSON ACQUISITION CO II$17.3K +21.3%
  • RIBBON ACQUISITION CORP$14.9K +46.0%
Show all 16 →

Top Trims

  • COMPASS PATHWAYS PLC-$5.3M -64.7%
  • FUTURE VISION II ACQUISITION-$871.1K -24.9%
  • EMPERY DIGITAL INC-$709.2K -16.8%
  • ESS TECH INC-$606.1K -53.8%
  • HEALTH IN TECH INC-$187.5K -34.6%
Show all 50 →

New Positions

  • AMC ENTMT HLDGS INC$24.0M
  • MEIRAGTX HLDGS PLC$11.5M
  • TAYSHA GENE THERAPIES INC$10.2M
  • STARLINK AI ACQUISITION CORP$10.1M
  • CH4 NATURAL SOLUTIONS CORP$7.9M
Show all 165 →

Exited Positions

  • SOLID POWER INC$37.2M
  • IONQ INC$23.5M
  • SEALSQ CORP$8.2M
  • FG MERGER II CORP$8.0M
  • PONO CAP FOUR INC$5.5M
Show all 106 →
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 FLUTTER ENTMT PLC FLUT G3643J108 $30.1M 6.94% 294,180 SH
2 AMC ENTMT HLDGS INC AMC 00165C302 $24.0M 5.53% 12,613,528 SH
3 MEIRAGTX HLDGS PLC MGTX G59665102 $11.5M 2.65% 850,000 SH
4 TAYSHA GENE THERAPIES INC TSHA 877619106 $10.2M 2.36% 1,500,000 SH
5 STARLINK AI ACQUISITION CORP OTAI.U G8443M128 $10.1M 2.33% 999,990 SH
6 CH4 NATURAL SOLUTIONS CORP MTNE G2104X101 $7.9M 1.82% 800,000 SH
7 JACKSON ACQUISITION CO II JACS G4992A110 $7.4M 1.72% 700,000 SH
8 JAB ACQUISITION CORP I JABRU G50004129 $7.0M 1.62% 700,000 SH
9 DRUGS MADE IN AMER ACQUTN CO DMAA G2847J104 $6.9M 1.59% 648,083 SH
10 TOYO CO LTD TOYO G8976D107 $6.9M 1.59% 989,231 SH
11 SNOW ROTHSCHILD ACQUISITION ISNRU G8251A125 $6.5M 1.50% 650,000 SH
12 GORES HOLDINGS XI INC GHXIU G40008123 $6.1M 1.40% 600,000 SH
13 IRON DOME ACQUISITION I CORP IDACU G4949K120 $6.1M 1.40% 600,000 SH
14 ALPEX ACQUISITION CORP ALPXU G63325123 $5.5M 1.27% 550,000 SH
15 PONO CAP FOUR INC PONO G71702107 $5.5M 1.26% 549,714 SH
16 DRUGS MADE IN AMER ACQ II CO DMII G2851K104 $5.2M 1.21% 519,400 SH
17 KOCHAV DEFENSE ACQUI CO KCHV G5304D106 $5.2M 1.20% 500,000 SH
18 PROQR THRAPEUTICS N V PRQR N71542109 $5.1M 1.19% 2,762,430 SH
19 OCEAN CAP ACQUISITION CORP OCAC.U G66903132 $5.1M 1.18% 500,000 SH
20 GENERAL CATALYST GBL RESIL M GCGR G3793T104 $5.0M 1.16% 500,000 SH
21 DISCIPLINED GROWTH DGAC.U G2775W127 $5.0M 1.16% 500,000 SH
22 BHAV ACQUISITION CORP BHAV G1R59W101 $4.9M 1.13% 493,719 SH
23 XFLH CAP CORP XFLH G9834D107 $4.7M 1.09% 475,000 SH
24 IRON HORSE ACQUISIT II CORP IRHO 46283H103 $4.7M 1.09% 470,000 SH
25 NMP ACQUISITION CORP NMP G6375X104 $4.6M 1.07% 450,000 SH
26 BERTO ACQUISITION CORP II GUACU G1051M126 $4.5M 1.05% 450,000 SH
27 BURTECH ACQUISITION CORP II BRKHU G1810A124 $4.0M 0.93% 400,000 SH
28 LONG TABLE GROWTH CORP LTGRU G5701H122 $4.0M 0.92% 400,000 SH
29 FIFTH ERA ACQUISITION CORP I FERA G3415K101 $3.6M 0.84% 350,000 SH
30 ARMADA ACQUISITION CORP III AACI G0R38M101 $3.6M 0.84% 365,000 SH
31 EMMIS ACQUISITION CORP. EMIS G3037D105 $3.6M 0.82% 350,000 SH
32 EMPERY DIGITAL INC EMPD 92864V608 $3.5M 0.81% 989,000 SH
33 FORTUNEX ACQUISITION CORP FXACU G3645W123 $3.5M 0.81% 350,000 SH
34 TWELVE SEAS INVT CO III TWLV G9145D101 $3.5M 0.81% 350,000 SH
35 FLAG SHIP ACQUISITION CORP FSHP G3530C109 $3.3M 0.76% 296,443 SH
36 FUTUREWAVE ACQUISITION CORP FWACU G37073122 $3.3M 0.75% 325,000 SH
37 COPLEY ACQUISITION CORP COPL G24243100 $3.1M 0.72% 300,000 SH
38 AI INFRASTRUCTURE ACQUISI AIIA G01336109 $3.1M 0.71% 300,000 SH
39 NEWBRIDGE ACQUISITION LTD NBRG G6464L102 $3.0M 0.69% 300,000 SH
40 WESTPORT FUEL SYSTEMS INC WPRT 960908507 $3.0M 0.69% 1,325,121 SH
41 FUTURE MONEY ACQUISITION COR FMAC G3700S108 $3.0M 0.69% 300,000 SH
42 VERNAL CAP ACQUISITION CORP VECA G93Y7F106 $3.0M 0.69% 300,000 SH
43 HENNESSY CAP INVTS CORP VIII HCIC G44055104 $3.0M 0.69% 300,000 SH
44 COMPASS PATHWAYS PLC CMPS 20451W101 $2.9M 0.67% 205,932 SH
45 PATRIOT ACQUISITION CORP PTACU G6951A122 $2.8M 0.65% 280,000 SH
46 PLUM ACQUISITION CORP IV PLMK G7134A104 $2.7M 0.61% 249,569 SH
47 FUTURE VISION II ACQUISITION FVN G37068106 $2.6M 0.61% 240,103 SH
48 THAYER VENTURES ACQ CORP II TVAI G87890102 $2.6M 0.60% 250,000 SH
49 ORIGIN INVT CORP I ORIQ G67751100 $2.6M 0.59% 249,900 SH
50 OXLEY BRIDGE ACQ LTD OBA G6858G107 $2.6M 0.59% 250,000 SH
Filing History
Period Filed AUM Holdings Accession
2026-06-30 2026-08-14 $433.1M 323 0001081698-26-000008
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