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Summit Street Capital Management, LLC — 13F Holdings & Portfolio

CIK 1595533 · latest 13F-HR filed 2026-08-14

Backtest portfolio

Summit Street Capital Management, LLC manages $712.6M in 13F-reported U.S. long-equity assets across 31 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are LNTH (6.24%), MOH (5.84%), HUM (5.10%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 1 new position and exited 1; 12 existing positions rose in reported value and 13 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
$712.6M

Long-equity book

Holdings
31

Distinct positions

Period
2026-06-30

Filed 2026-08-14

Q/Q Activity
+1 / −1 / ↑12 / ↓13

vs 2026-03-31

Portfolio charts

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

Portfolio map

Q2 26
LNTH6.2% · -4%MOH5.8% · -6%HUM5.1% · +37%SIG4.1% · +21%UTHR4.0% · -7%ELV3.9% · -3%WFRD3.9% · -5%FOXA3.8% · +62%HPQ3.7% · +86%VLO3.7% · -22%CF3.6% · -11%HCC3.6% · -10%MPC3.5% · -7%CNR3.2% · -7%KLAC3.1% · +389%CMCSA3.1% · newMU3.1% · -64%LRCX3.1% · -50%AMAT3.0% · -50%INTC2.7% · -62%DINO2.6% · -11%IDCC2.5% · 0%STNG2.5% · -39%LYB2.5% · -20%TNK2.5% · -42%DDS2.4% · -4%CSCO2.3% · -30%LB2.3% · -10%TPL2.1% · -8%BKE1.6% · -7%GNTX0.7% · 0%

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 = 44.1%

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

Firm Profile & Key People
Assets Under Management
$757.5M
Discretionary
$713.6M
Employees
5
Accounts
3
Address
12 EAST 49TH STREET
26TH FLOOR
NEW YORK, NY 10017
Phone
(212) 750-7036
Website
Name Title / Status Ownership Type
WALLACE, JENNIFER, A. ControlMANAGING MEMBER50–75%Individual
WILLIAMS, ARTHUR, T. ControlMANAGING MEMBER50–75%Individual
RISHEL, DAVID, LEECCOLess than 5%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.

Top Adds (vs prior quarter)

Show all 12 →

Top Trims

Show all 13 →

New Positions

Show all 1 →

Exited Positions

Show all 1 →

Summit Street Capital 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 LANTHEUS HLDGS INC LNTH 516544103 $44.5M 6.24% 400,699 SH
2 MOLINA HEALTHCARE INC MOH 60855R100 $41.6M 5.84% 182,031 SH
3 HUMANA INC HUM 444859102 $36.3M 5.10% 91,449 SH
4 SIGNET JEWELERS LIMITED SIG G81276100 $29.1M 4.08% 337,316 SH
5 UNITED THERAPEUTICS CORP DEL UTHR 91307C102 $28.6M 4.01% 52,789 SH
6 ELEVANCE HEALTH INC FORMERLY ELV 036752103 $27.9M 3.91% 72,040 SH
7 WEATHERFORD INTL PLC WFRD G48833118 $27.5M 3.86% 337,875 SH
8 FOX CORP FOXA 35137L105 $26.8M 3.76% 514,311 SH
9 HP INC HPQ 40434L105 $26.1M 3.66% 1,189,974 SH
10 VALERO ENERGY CORP VLO 91913Y100 $26.1M 3.66% 100,073 SH
11 CF INDUSTRIES HOLD CF 125269100 $25.9M 3.63% 238,812 SH
12 WARRIOR MET COAL INC HCC 93627C101 $25.7M 3.61% 317,202 SH
13 MARATHON PETE CORP MPC 56585A102 $25.0M 3.51% 97,758 SH
14 CORE NATURAL RESOURCES INC CNR 218937100 $22.7M 3.19% 284,218 SH
15 KLA CORP KLAC 482480100 $22.1M 3.10% 73,279 SH
16 COMCAST CORP NEW CMCSA 20030N101 $22.0M 3.08% 895,459 SH
17 MICRON TECHNOLOGY INC MU 595112103 $22.0M 3.08% 19,018 SH
18 LAM RESEARCH CORP LRCX 512807306 $21.9M 3.07% 50,428 SH
19 APPLIED MATLS INC AMAT 038222105 $21.4M 3.00% 29,589 SH
20 INTEL CORP INTC 458140100 $19.1M 2.69% 137,030 SH
21 HF SINCLAIR CORP DINO 403949100 $18.3M 2.57% 263,017 SH
22 INTERDIGITAL INC IDCC 45867G101 $18.2M 2.55% 64,149 SH
23 SCORPIO TANKERS INC STNG Y7542C130 $17.8M 2.50% 256,772 SH
24 LYONDELLBASELL INDUSTRIES NV LYB N53745100 $17.7M 2.49% 336,501 SH
25 TEEKAY TANKERS LTD TNK G8726X106 $17.6M 2.47% 270,880 SH
26 DILLARDS INC DDS 254067101 $16.8M 2.35% 31,734 SH
27 CISCO SYS INC CSCO 17275R102 $16.7M 2.35% 142,412 SH
28 LANDBRIDGE COMPANY LLC LB 514952100 $16.1M 2.26% 203,365 SH
29 TEXAS PACIFIC LAND CORPORATI TPL 88262P102 $14.8M 2.08% 33,918 SH
30 BUCKLE INC BKE 118440106 $11.5M 1.61% 271,903 SH
31 GENTEX CORP GNTX 371901109 $4.9M 0.68% 192,825 SH
Filing History
Period Filed AUM Holdings Accession
2026-06-30 2026-08-14 $712.6M 31 0001595533-26-000004
2026-03-31 2026-05-15 $707.3M 31 0001595533-26-000003
2025-12-31 2026-02-17 $636.2M 31 0001595533-26-000002
2025-09-30 2025-11-14 $729.0M 30 0001595533-25-000006
Filer Information
Address
12 EAST 49TH STREET
26TH FLOOR
NEW YORK, NY 10017
Phone
(212) 750-7036
Filing Manager
Summit Street Capital Management, LLC
NEW YORK, NY
Signatory
Arthur T. Williams III
Chief Financial Officer