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Ursa Fund Management, LLC — 13F Holdings & Portfolio

CIK 1693838 · latest 13F-HR filed 2026-08-14

Backtest portfolio

Ursa Fund Management, LLC manages $1.28B in 13F-reported U.S. long-equity assets across 38 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are MSFT (16.04%), MSFT (16.04%), MU (11.28%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 15 new positions and exited 6; 4 existing positions rose in reported value and 1 fell.

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.

Loading holdings…
AUM
$1.28B

Long-equity book

Holdings
38

Distinct positions

Period
2026-06-30

Filed 2026-08-14

Q/Q Activity
+15 / −6 / ↑4 / ↓1

vs 2026-03-31

Portfolio charts

Latest quarter's book, what changed, and how the portfolio has evolved across filings.

Portfolio map

Q2 26
MSFT33.6% · newMU23.6% · newTSLA20.7% · newAMZN5.9% · newGAB5.2% · -82%CLBK4.4% · +155%NVDA3.3% · newEOSE1.2% · newNFBK1.0% · +300%IBIT0.4% · +9%OPTU0.3% · newWHLRP0.3% · +1%SSTK0.1% · newRMAX0.0% · newPLUG0.0% · newINM0.0% · newCSIQ0.0% · newPSKY0.0% · newSPCE0.0% · newGETY0.0% · new

Box size = position value; colour = change in share count vs the prior quarter (green added, red trimmed, blue new). Rows split across managers or share classes are combined. Click a box for the stock.

Sector mix

% of 13F value

Sectors from each company's SIC code; funds and ETFs grouped separately.

Biggest buys and sells

Q1 26 → Q2 26

Estimated from the change in shares held × the quarter-end price, so price moves alone don't count as buying. New and exited positions are included.

13F assets and positions

4 quarters

Total reported 13F value (bars) and number of positions (line) each quarter. Value changes include market moves.

Top positions over time

reported value

The eight largest current positions, valued at each quarter end.

Concentration

top 10 = 99.2%

Cumulative share of the portfolio held in the largest N positions.

Firm Profile & Key People
Assets Under Management
$1.20B
Discretionary
$1.20B
Employees
2
Accounts
2
Address
156 DIABLO RD
STE 250
DANVILLE, CA 94526
Phone
(415) 529-6040
Website
This firm reports 1 disclosure item on its registration.
Name Title / Status Ownership Type
DOUGLAS, RUSSELL, PALMER ControlMANAGING MEMBER25–50%Individual
HAHN, ANDREW, PHILIP ControlMANAGING MEMBER, CCO50–75%Individual

Quarter-over-quarter changes

Changes in reported position value vs the prior 13F, so price moves count too, not just shares bought or sold.

Ursa Fund Management, LLC Holdings (2026-06-30)

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 MICROSOFT CORP Put MSFT 594918104 $205.2M 16.04% 550,000 SH
2 MICROSOFT CORP MSFT 594918104 $205.2M 16.04% 550,000 SH
3 MICRON TECHNOLOGY INC MU 595112103 $144.3M 11.28% 125,000 SH
4 MICRON TECHNOLOGY INC Put MU 595112103 $144.3M 11.28% 125,000 SH
5 TESLA INC TSLA 88160R101 $126.2M 9.86% 300,000 SH
6 TESLA INC Put TSLA 88160R101 $126.2M 9.86% 300,000 SH
7 STATE STR SPDR S&P 500 ETF T Put SPY 78462F103 $56.0M 4.38% 75,000 SH
8 AMAZON COM INC AMZN 023135106 $35.8M 2.79% 150,000 SH
9 AMAZON COM INC Put AMZN 023135106 $35.8M 2.79% 150,000 SH
10 GABELLI EQUITY TR INC GAB 362397101 $31.4M 2.46% 5,555,196 SH
11 COLUMBIA FINL INC CLBK 197641103 $27.1M 2.12% 1,275,888 SH
12 COLUMBIA FINL INC Call CLBK 197641103 $20.1M 1.57% 944,900 SH
13 NVIDIA CORPORATION Put NVDA 67066G104 $20.0M 1.56% 100,000 SH
14 NVIDIA CORPORATION NVDA 67066G104 $20.0M 1.56% 100,000 SH
15 ISHARES TR Put IWM 464287655 $15.0M 1.17% 50,000 SH
16 SPDR SERIES TRUST Put KRE 78464A698 $12.2M 0.95% 163,200 SH
17 SPDR SERIES TRUST Call KRE 78464A698 $12.0M 0.94% 160,000 SH
18 EOS ENERGY ENTERPRISES INC Put EOSE 29415C101 $8.9M 0.69% 1,508,500 SH
19 EOS ENERGY ENTERPRISES INC EOSE 29415C101 $7.3M 0.57% 1,235,459 SH
20 NORTHFIELD BANCORP INC DEL NFBK 66611T108 $5.9M 0.46% 400,000 SH
21 INVESCO EXCHANGE TRADED FD T Call RSP 46137V357 $4.3M 0.33% 20,000 SH
22 BOSTON SCIENTIFIC CORP Call BSX 101137107 $3.2M 0.25% 75,000 SH
23 ISHARES BITCOIN TRUST ETF IBIT 46438F101 $2.5M 0.19% 74,400 SH
24 ISHARES BITCOIN TRUST ETF Put IBIT 46438F101 $2.3M 0.18% 70,000 SH
25 OPTIMUM COMMUNICATIONS INC Put OPTU 02156K103 $2.1M 0.16% 1,447,800 SH
26 OPTIMUM COMMUNICATIONS INC OPTU 02156K103 $2.0M 0.16% 1,407,850 SH
27 WHEELER REAL ESTATE INVT TR WHLRP 963025309 $1.6M 0.13% 161,000 SH
28 QXO INC Call QXO 82846H405 $967.7K 0.08% 56,000 SH
29 SHUTTERSTOCK INC SSTK 825690100 $308.8K 0.02% 22,138 SH
30 RE/MAX HLDGS INC RMAX 75524W108 $246.5K 0.02% 25,000 SH
31 COLUMBIA FINL INC Put CLBK 197641103 $229.2K 0.02% 10,800 SH
32 PLUG PWR INC PLUG 72919P202 $203.2K 0.02% 75,000 SH
33 INMED PHARMACEUTICALS INC INM 457637700 $195.0K 0.02% 125,800 SH
34 GETTY IMAGES HOLDINGS INC Put GETY 374275105 $174.7K 0.01% 203,100 SH
35 CANADIAN SOLAR INC CSIQ 136635109 $160.2K 0.01% 10,000 SH
36 PARAMOUNT SKYDANCE CORP PSKY 69932A204 $98.6K 0.01% 10,000 SH
37 VIRGIN GALACTIC HOLDINGS INC SPCE 92766K403 $72.2K 0.01% 25,000 SH
38 GETTY IMAGES HOLDINGS INC GETY 374275105 $38 0.00% 44 SH
Filing History
Period Filed AUM Holdings Accession
2026-06-30 2026-08-14 $1.28B 38 0001693838-26-000004
2026-03-31 2026-05-15 $107.5M 20 0001693838-26-000003
2025-12-31 2026-02-17 $2.44B 44 0001693838-26-000002
2025-09-30 2025-11-14 $89.1M 18 0001693838-25-000004
Filer Information
Address
156 DIABLO RD, STE 250
DANVILLE, CA 94526
Phone
(415) 529-6040
Filing Manager
Ursa Fund Management, LLC
Danville, CA
Signatory
Andrew Hahn
Manager