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WINMILL & CO. INC — 13F Holdings & Portfolio

CIK 52234 · latest 13F-HR filed 2026-08-13

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WINMILL & CO. INC manages $451.7M in 13F-reported U.S. long-equity assets across 84 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are LRCX (9.31%), STLD (8.13%), IBKR (5.86%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 7 new positions, exited 5, added to 22, and trimmed 12.

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
17 OLD DREWSVILLE RD
WALPOLE, NH 03608
Phone
(212) 785-0900
Filing Manager
WINMILL & CO. INC
WALPOLE, NH
Signatory
Russell Kamerman
Co-General Counsel
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AUM

$451.7M

Long-equity book

Holdings

84

Distinct positions

Period

2026-06-30

Filed 2026-08-13

Q/Q Activity

+7 / −5 / ↑22 / ↓12

vs 2026-03-31

Firm Profile & Key People
Name Title / Status Ownership Type

Top Adds (vs prior quarter)

  • Lam Research Corporation$23.9M +102.8%
  • STEEL DYNAMICS INC$8.3M +27.5%
  • Alphabet, Inc.$7.5M +24.3%
  • Interactive Brokers Group, Inc.$6.5M +29.8%
  • UNITED RENTALS INC$6.2M +55.5%
Show all 22 →

Top Trims

  • IAMGOLD Corporation-$3.5M -15.8%
  • DILLARDS INC-$941.0K -7.6%
  • LPL Financial Holdings, Inc.-$890.5K -6.4%
  • Aura Minerals, Inc.-$652.8K -22.9%
  • Kinross Gold Corporation-$472.6K -22.6%
Show all 12 →

New Positions

  • MICROSOFT CORP$14.8M
  • Ameriprise Financial, Inc.$10.1M
  • Duolingo, Inc.$10.0M
  • White Mountains Insurance Group Ltd.$10.0M
  • GoDaddy, Inc.$7.0M
Show all 7 →

Exited Positions

  • HCA Healthcare, Inc.$12.5M
  • Agnico Eagle Mines Ltd.$3.0M
  • Elevance Health, Inc.$2.8M
  • Newmont Corporation$2.2M
  • Triple Flag Precious Metals Corporation$1.9M
Show all 5 →
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 Lam Research Corporation LRCX 512807306 $42.0M 9.31% 97,000 SH
2 Steel Dynamics, Inc. STLD 858119100 $36.7M 8.13% 160,000 SH
3 Interactive Brokers Group, Inc. IBKR 45841N107 $26.5M 5.86% 304,000 SH
4 Alphabet, Inc. GOOGL 02079K305 $23.5M 5.20% 65,700 SH
5 Williams-Sonoma, Inc. WSM 969904101 $22.4M 4.95% 96,000 SH
6 Mueller Industries, Inc. MLI 624756102 $19.8M 4.39% 161,400 SH
7 IAMGOLD Corporation IAG 450913108 $16.5M 3.65% 1,040,000 SH
8 United Rentals, Inc. URI 911363109 $16.4M 3.64% 14,500 SH
9 NMI Holdings, Inc. NMIH 629209305 $15.6M 3.45% 379,226 SH
10 Progressive Corporation (The) PGR 743315103 $15.4M 3.42% 70,706 SH
11 Clear Secure, Inc. YOU 18467V109 $15.3M 3.39% 275,054 SH
12 Alphabet, Inc. GOOGL 02079K305 $15.2M 3.35% 42,400 SH
13 LPL Financial Holdings, Inc. LPLA 50212V100 $13.1M 2.90% 46,500 SH
14 Microsoft Corporation MSFT 594918104 $12.9M 2.85% 34,500 SH
15 Essent Group Ltd. ESNT G3198U102 $12.9M 2.85% 200,000 SH
16 Qualys, Inc. QLYS 74758T303 $10.8M 2.39% 78,483 SH
17 Dillard's, Inc. DDS 254067101 $10.7M 2.38% 20,300 SH
18 Nutex Health, Inc. NUTX 67079U306 $10.6M 2.35% 62,000 SH
19 White Mountains Insurance Group Ltd. WTM G9618E107 $10.0M 2.20% 4,800 SH
20 Ameriprise Financial, Inc. AMP 03076C106 $9.6M 2.12% 20,900 SH
21 Duolingo, Inc. DUOL 26603R106 $8.9M 1.97% 77,509 SH
22 NVR, Inc. NVR 62944T105 $7.1M 1.58% 1,045 SH
23 GoDaddy, Inc. GDDY 380237107 $6.6M 1.47% 78,000 SH
24 UnitedHealth Group, Inc. UNH 91324P102 $5.6M 1.24% 13,500 SH
25 Alarm.com Holdings, Inc. ALRM 011642105 $5.6M 1.24% 119,500 SH
26 Lam Research Corporation LRCX 512807306 $5.2M 1.15% 12,000 SH
27 Mastercard, Inc. MA 57636Q104 $5.1M 1.14% 10,000 SH
28 Williams-Sonoma, Inc. WSM 969904101 $3.5M 0.77% 15,000 SH
29 SSR Mining, Inc. SSRM 784730103 $2.7M 0.59% 95,000 SH
30 IAMGOLD Corporation IAG 450913108 $2.4M 0.53% 150,000 SH
31 JPMorgan Chase & Company JPM 46625H100 $2.2M 0.49% 6,800 SH
32 Aura Minerals, Inc. AUGO G06973112 $2.2M 0.49% 35,000 SH
33 Interactive Brokers Group, Inc. IBKR 45841N107 $2.0M 0.45% 23,200 SH
34 Wheaton Precious Metals Corporation WPM 962879102 $1.9M 0.42% 16,700 SH
35 Steel Dynamics, Inc. STLD 858119100 $1.8M 0.40% 7,900 SH
36 B2Gold Corporation BTG 11777Q209 $1.8M 0.39% 475,000 SH
37 McEwen Mining, Inc. MUX 58039P305 $1.8M 0.39% 97,500 SH
38 Progressive Corporation (The) PGR 743315103 $1.8M 0.39% 8,059 SH
39 Microsoft Corporation MSFT 594918104 $1.7M 0.37% 4,500 SH
40 Royal Gold, Inc. RGLD 780287108 $1.7M 0.37% 8,400 SH
41 Kinross Gold Corporation KGC 496902404 $1.6M 0.36% 68,500 SH
42 GLOBAL SELF STORAGE INC. SELF 37955N106 $1.6M 0.35% 303,758 SH
43 EXTRA SPACE STORAGE INC EXR 30225T102 $1.5M 0.32% 10,027 SH
44 Qualys, Inc. QLYS 74758T303 $1.4M 0.31% 10,158 SH
45 Berkshire Hathaway, Inc. BRK.B 084670702 $1.3M 0.28% 2,500 SH
46 SPDR Gold Shares GLD 78463V107 $1.2M 0.27% 3,290 SH
47 Duolingo, Inc. DUOL 26603R106 $1.0M 0.23% 9,043 SH
48 Mueller Industries, Inc. MLI 624756102 $968.7K 0.21% 7,880 SH
49 Essent Group Ltd. ESNT G3198U102 $932.1K 0.21% 14,500 SH
50 United Rentals, Inc. URI 911363109 $832.7K 0.18% 735 SH
Filing History
Period Filed AUM Holdings Accession
2026-06-30 2026-08-13 $451.7M 84 0000892712-26-000347
2026-03-31 2026-05-14 $346.6M 79 0000892712-26-000244
2025-12-31 2026-02-13 $374.9M 83 0000892712-26-000091
2025-09-30 2025-11-13 $412.4M 89 0000892712-25-000148