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Odyssean, LLC — 13F Holdings & Portfolio

CIK 2092853 · latest 13F-HR filed 2026-08-14

Backtest portfolio

Odyssean, LLC manages $614.9M in 13F-reported U.S. long-equity assets across 485 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are RARE (0.66%), KYMR (0.64%), IDYA (0.62%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 166 new positions and exited 99; 280 existing positions rose in reported value and 27 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.

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AUM
$614.9M

Long-equity book

Holdings
485

Distinct positions

Period
2026-06-30

Filed 2026-08-14

Q/Q Activity
+166 / −99 / ↑280 / ↓27

vs 2026-03-31

Portfolio charts

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

Portfolio map

Q2 26
RARE0.7% · +81%KYMR0.6% · +133%IDYA0.6% · +572%PCVX0.6% · +212%AFRM0.6% · +139%CLDX0.6% · newLOAR0.6% · +111%MIRM0.6% · +150%DASH0.6% · newKRYS0.6% · +94%VIK0.5% · +55%MEDP0.5% · newTOST0.5% · +144%AHR0.5% · +121%NIC0.5% · +101%VEEV0.5% · +144%GRBK0.5% · +93%ESNT0.5% · +102%MSGE0.5% · +60%IPAR0.5% · +87%EEFT0.5% · +121%NU0.5% · newXYZ0.5% · +92%HCI0.5% · +112%DELL0.5% · -15%KGS0.5% · +68%RDNT0.5% · +378%PPLI0.5% · newDNLI0.5% · newABNB0.5% · +104%AMRX0.5% · +62%CRNX0.5% · newYELP0.5% · newKNSL0.5% · +141%CHEF0.5% · +38%AEP0.5% · +109%CAKE0.5% · +66%SFBS0.5% · +90%NTCT0.5% · +44%BOX0.5% · +104%MSGS0.5% · +64%AWK0.5% · +112%ABR0.5% · +227%TSLA0.5% · +98%AVPT0.5% · +106%BBIO0.5% · newVNO0.5% · newNXST0.5% · +189%V0.5% · newBRK.B0.5% · +103%RPRX0.5% · +65%WTRG0.5% · newSO0.5% · +105%INVH0.5% · +77%DBX0.5% · +93%DUK0.5% · +109%HOMB0.5% · +94%IVR0.5% · +145%AAPL0.5% · +78%GOOGL0.5% · +66%

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

3 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 = 6%

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

Firm Profile & Key People

As of the firm’s regulatory filing dated Mar 12, 2026.

Assets Under Management
$373.3M
Discretionary
$373.3M
Employees
2
Accounts
1
Phone
(203) 418-1433
Name Title / Status Ownership Type
BONVILLIAN, RAPHAEL, WILLIAM BOONE ControlCO-FOUNDER, MANAGING MEMBER, CO-CIO
since Aug 2025
50–75%Individual
Bonvillian, Marcus, Doughty ControlCO-FOUNDER, MANAGING MEMBER, CO-CIO, CHIEF COMPLIANCE OFFICER
since Aug 2025
50–75%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.

Odyssean, 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 ULTRAGENYX PHARMACEUTICAL IN RARE 90400D108 $4.1M 0.66% 122,087 SH
2 KYMERA THERAPEUTICS INC KYMR 501575104 $4.0M 0.64% 34,485 SH
3 IDEAYA BIOSCIENCES INC IDYA 45166A102 $3.8M 0.62% 102,582 SH
4 VAXCYTE INC PCVX 92243G108 $3.6M 0.59% 62,638 SH
5 AFFIRM HLDGS INC AFRM 00827B106 $3.6M 0.58% 43,968 SH
6 CELLDEX THERAPEUTICS INC NEW CLDX 15117B202 $3.5M 0.58% 95,069 SH
7 LOAR HOLDINGS INC LOAR 53947R105 $3.5M 0.57% 43,660 SH
8 MIRUM PHARMACEUTICALS INC MIRM 604749101 $3.5M 0.57% 29,924 SH
9 DOORDASH INC DASH 25809K105 $3.5M 0.57% 18,915 SH
10 KRYSTAL BIOTECH INC KRYS 501147102 $3.5M 0.57% 9,349 SH
11 VIKING HOLDINGS LTD VIK G93A5A101 $3.4M 0.55% 32,226 SH
12 MEDPACE HLDGS INC MEDP 58506Q109 $3.4M 0.55% 6,361 SH
13 TOAST INC TOST 888787108 $3.3M 0.54% 119,775 SH
14 AMERICAN HEALTHCARE REIT INC AHR 398182303 $3.3M 0.54% 63,508 SH
15 NICOLET BANKSHARES INC NIC 65406E102 $3.3M 0.54% 20,012 SH
16 VEEVA SYS INC VEEV 922475108 $3.3M 0.54% 18,634 SH
17 GREEN BRICK PARTNERS INC GRBK 392709101 $3.3M 0.54% 41,180 SH
18 ESSENT GROUP LTD ESNT G3198U102 $3.3M 0.53% 50,922 SH
19 MADISON SQUARE GARDEN ENTMT MSGE 558256103 $3.3M 0.53% 40,452 SH
20 INTERPARFUMS INC IPAR 458334109 $3.3M 0.53% 29,208 SH
21 EURONET WORLDWIDE INC EEFT 298736109 $3.3M 0.53% 44,597 SH
22 NU HLDGS LTD NU G6683N103 $3.3M 0.53% 243,873 SH
23 BLOCK INC XYZ 852234103 $3.2M 0.53% 42,762 SH
24 HCI GROUP INC HCI 40416E103 $3.2M 0.53% 18,528 SH
25 DELL TECHNOLOGIES INC DELL 24703L202 $3.2M 0.53% 7,515 SH
26 KODIAK GAS SVCS INC KGS 50012A108 $3.2M 0.53% 43,034 SH
27 RADNET INC RDNT 750491102 $3.2M 0.53% 52,421 SH
28 PEOPLE INC PPLI 44891N208 $3.2M 0.52% 69,719 SH
29 DENALI THERAPEUTICS INC DNLI 24823R105 $3.2M 0.52% 125,062 SH
30 AIRBNB INC ABNB 009066101 $3.2M 0.52% 22,474 SH
31 AMNEAL PHARMACEUTICALS INC AMRX 03168L105 $3.2M 0.52% 183,507 SH
32 CRINETICS PHARMACEUTICALS IN CRNX 22663K107 $3.2M 0.51% 84,456 SH
33 YELP INC YELP 985817105 $3.2M 0.51% 128,693 SH
34 KINSALE CAP GROUP INC KNSL 49714P108 $3.1M 0.51% 9,547 SH
35 CHEFS WHSE INC CHEF 163086101 $3.1M 0.51% 32,758 SH
36 AMERICAN ELEC PWR CO INC AEP 025537101 $3.1M 0.51% 23,004 SH
37 CHEESECAKE FACTORY INC CAKE 163072101 $3.1M 0.51% 39,490 SH
38 SERVISFIRST BANCSHARES INC SFBS 81768T108 $3.1M 0.51% 36,082 SH
39 NETSCOUT SYS INC NTCT 64115T104 $3.1M 0.51% 71,772 SH
40 BOX INC BOX 10316T104 $3.1M 0.51% 117,086 SH
41 MADISON SQUARE GRDN SPRT COR MSGS 55825T103 $3.1M 0.51% 7,728 SH
42 AMERICAN WTR WKS CO INC NEW AWK 030420103 $3.1M 0.50% 23,536 SH
43 ARBOR REALTY TRUST INC ABR 038923108 $3.1M 0.50% 570,598 SH
44 TESLA INC TSLA 88160R101 $3.1M 0.50% 7,314 SH
45 AVEPOINT INC AVPT 053604104 $3.1M 0.50% 273,488 SH
46 BRIDGEBIO PHARMA INC BBIO 10806X102 $3.1M 0.50% 41,015 SH
47 VORNADO RLTY TR VNO 929042109 $3.1M 0.50% 77,680 SH
48 NEXSTAR MEDIA GROUP INC NXST 65336K103 $3.0M 0.49% 17,036 SH
49 VISA INC V 92826C839 $3.0M 0.49% 8,866 SH
50 BERKSHIRE HATHAWAY INC DEL BRK.B 084670702 $3.0M 0.49% 6,076 SH
Filing History
Period Filed AUM Holdings Accession
2026-06-30 2026-08-14 $614.9M 485 0002092853-26-000004
2026-03-31 2026-05-15 $273.9M 418 0002092853-26-000003
2025-12-31 2026-02-17 $139.2M 254 0002092853-26-000002
Filer Information
Address
7 PASTURE LANE
DARIEN, CT 06820
Phone
(203) 418-1433
Filing Manager
Odyssean, LLC
DARIEN, CT
Signatory
Marcus Bonvillian
Chief Compliance Officer