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Blume Capital Management, Inc. — 13F Holdings & Portfolio

CIK 1587192 · latest 13F-HR filed 2026-07-27

Backtest portfolio

Blume Capital Management, Inc. manages $683.7M in 13F-reported U.S. long-equity assets across 359 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are GOOG (5.54%), MU (4.38%), AAPL (4.28%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 29 new positions and exited 9; 175 existing positions rose in reported value and 78 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
$683.7M

Long-equity book

Holdings
359

Distinct positions

Period
2026-06-30

Filed 2026-07-27

Q/Q Activity
+29 / −9 / ↑175 / ↓78

vs 2026-03-31

Portfolio charts

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

Portfolio map

Q2 26
GOOG5.6% · -0%MU4.4% · -39%AAPL4.3% · +1%VBIL3.8% · +73%DFIC3.6% · +2%AMAT3.2% · -23%C3.1% · -1%VCRB2.9% · +8%AMZN2.7% · +46%DFCF2.7% · -6%XLE2.4% · -0%SCHW2.3% · +1%FCX2.1% · -0%DFEM2.1% · -0%JCPB2.0% · +0%BAC2.0% · +0%COF2.0% · +2%UBER1.8% · +8%JNJ1.7% · -14%DFEV1.7% · -0%WFC1.6% · +3%META1.6% · +3%MSFT1.5% · +14%NVDA1.5% · +16%CMCSA1.5% · +12%DIS1.5% · +0%GOOGL1.4% · -0%FDX1.3% · -25%BKR1.3% · -0%CSEN1.1% · newVTI1.0% · 0%FISV1.0% · +15%RIO1.0% · -0%CNH0.9% · +0%ARCC0.9% · -0%PFE0.9% · +1%VCRM0.8% · +5%BRK.B0.8% · -2%JPM0.8% · -2%GS0.8% · -7%WY0.8% · +1%IBB0.8% · -1%VGIT0.7% · +4%GDX0.7% · -0%DE0.7% · +2%CVS0.7% · -1%CHWY0.6% · +184%COST0.6% · -1%ELV0.6% · -3%IFF0.6% · +6%DFAS0.6% · -2%MLPX0.6% · +0%SLB0.5% · -0%SGOV0.5% · -20%CSRE0.5% · +1%VTEB0.5% · 0%VGSH0.4% · +1062%NTR0.4% · +32018%AKRE0.4% · -2%XHLF0.4% · -3%

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 = 36.3%

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

Firm Profile & Key People

As of the firm’s regulatory filing dated May 27, 2026.

Assets Under Management
$856.6M
Discretionary
$856.6M
Employees
7
Accounts
903
Address
1708 SHATTUCK AVE.
BERKELEY, CA 94709
Phone
(510) 549-3534
Website
Name Title / Status Ownership Type
BLUME, JAMES, BERYL ControlCHAIRMAN
since Jul 2019
25–50%Individual
REIDENBACH, PETER, BRAY ControlPRESIDENT AND CHIEF INVESTMENT OFFICER
since Oct 2015
25–50%Individual
ST. CLAIRE, JEFFREY, VALENTINE ControlCHIEF EXECUTIVE OFFICER AND CHIEF COMPLIANCE OFFICER
since Jun 2009
25–50%Individual
Ownership & leadership changes · 5 filings with changes since Nov 18, 2011

From the firm’s regulatory filings, newest first. Dates are filing dates: a filing that no longer lists someone does not say when they left.

Mar 26, 2024 filing
  • ChangedREIDENBACH, PETER, BRAY · ownership 10–25% → 25–50%
Mar 30, 2022 filing
  • ChangedBLUME, JAMES, BERYL · title CHAIRMAN/CEO → CHAIRMAN; ownership 50–75% → 25–50%
  • ChangedREIDENBACH, PETER, BRAY · title OWNER AND CHIEF INVESTMENT OFFICER → PRESIDENT AND CHIEF INVESTMENT OFFICER
  • ChangedST. CLAIRE, JEFFREY, VALENTINE · title PRESIDENT AND CHIEF COMPLIANCE OFFICER → CHIEF EXECUTIVE OFFICER AND CHIEF COMPLIANCE OFFICER
Sep 28, 2015 filing
  • ChangedREIDENBACH, PETER, BRAY · title OWNER AND DIRECTOR → OWNER AND CHIEF INVESTMENT OFFICER; now a control person
  • ChangedST. CLAIRE, JEFFREY, VALENTINE · ownership 10–25% → 25–50%
Aug 30, 2013 filing
  • AddedREIDENBACH, PETER, BRAY · OWNER AND DIRECTOR · 10–25%
  • ChangedBLUME, JAMES, BERYL · ownership 75% or more → 50–75%
  • ChangedST. CLAIRE, JEFFREY, VALENTINE · ownership 25–50% → 10–25%
Jun 29, 2012 filing
  • No longer listedMARANIA, GERALDINE, IMPERIAL · CHIEF COMPLIANCE OFFICER · Less than 5% · listed since Jan 2010
  • ChangedST. CLAIRE, JEFFREY, VALENTINE · title PRESIDENT → PRESIDENT AND CHIEF COMPLIANCE OFFICER
Nov 18, 2011 filing (earliest on record)
  • ListedBLUME, JAMES, BERYL · CHAIRMAN/CEO · 75% or more · control person
  • ListedMARANIA, GERALDINE, IMPERIAL · CHIEF COMPLIANCE OFFICER · Less than 5%
  • ListedST. CLAIRE, JEFFREY, VALENTINE · PRESIDENT · 25–50% · control person

Quarter-over-quarter changes

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

Blume Capital Management, Inc. 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 ALPHABET INC GOOG 02079K107 $37.9M 5.54% 107,198 SH
2 MICRON TECHNOLOGY INC MU 595112103 $29.9M 4.38% 25,926 SH
3 APPLE INC AAPL 037833100 $29.3M 4.28% 101,193 SH
4 VANGUARD INSTL INDEX FD VBIL 922040845 $25.6M 3.74% 337,853 SH
5 DIMENSIONAL ETF TRUST DFIC 25434V799 $24.0M 3.51% 644,311 SH
6 APPLIED MATLS INC AMAT 038222105 $21.8M 3.18% 30,091 SH
7 CITIGROUP INC C 172967424 $20.8M 3.05% 148,784 SH
8 VANGUARD MALVERN FDS VCRB 922020748 $19.3M 2.82% 250,052 SH
9 AMAZON COM INC AMZN 023135106 $18.2M 2.67% 76,513 SH
10 DIMENSIONAL ETF TRUST DFCF 25434V872 $18.0M 2.64% 427,481 SH
11 SELECT SECTOR SPDR TR XLE 81369Y506 $16.4M 2.40% 308,691 SH
12 SCHWAB CHARLES CORP SCHW 808513105 $15.6M 2.29% 169,578 SH
13 FREEPORT MCMORAN INC FCX 35671D857 $14.3M 2.09% 226,772 SH
14 DIMENSIONAL ETF TRUST DFEM 25434V732 $13.9M 2.04% 342,986 SH
15 J P MORGAN EXCHANGE TRADED F JCPB 46641Q670 $13.5M 1.97% 286,555 SH
16 BANK OF AMER CORP BAC 060505104 $13.2M 1.94% 232,212 SH
17 CAPITAL ONE FINL CORP COF 14040H105 $13.2M 1.93% 65,631 SH
18 UBER TECHNOLOGIES INC UBER 90353T100 $12.4M 1.81% 171,277 SH
19 JOHNSON & JOHNSON JNJ 478160104 $11.4M 1.67% 45,083 SH
20 DIMENSIONAL ETF TRUST DFEV 25434V740 $11.1M 1.63% 261,152 SH
21 WELLS FARGO & CO WFC 949746101 $10.6M 1.56% 128,792 SH
22 META PLATFORMS INC META 30303M102 $10.6M 1.56% 18,883 SH
23 MICROSOFT CORP MSFT 594918104 $10.2M 1.50% 27,474 SH
24 NVIDIA CORPORATION NVDA 67066G104 $10.1M 1.48% 50,425 SH
25 COMCAST CORP NEW CMCSA 20030N101 $9.9M 1.44% 402,405 SH
26 DISNEY WALT CO DIS 254687106 $9.8M 1.43% 101,929 SH
27 ALPHABET INC GOOGL 02079K305 $9.5M 1.39% 26,583 SH
28 FEDEX CORP FDX 31428X106 $9.1M 1.33% 29,002 SH
29 BAKER HUGHES COMPANY BKR 05722G100 $8.6M 1.26% 155,341 SH
30 STATE STR SPDR S&P 500 ETF T Put SPY 78462F103 $7.5M 1.09% 10,000 PRN
31 COHEN & STEERS ETF TRUST CSEN 19249U609 $7.2M 1.06% 305,375 SH
32 VANGUARD INDEX FDS VTI 922908769 $7.0M 1.02% 18,860 SH
33 FISERV INC FISV 337738108 $6.7M 0.97% 135,659 SH
34 RIO TINTO PLC RIO 767204100 $6.4M 0.94% 67,656 SH
35 CNH INDL N V CNH N20944109 $6.3M 0.92% 560,710 SH
36 ARES CAPITAL CORP ARCC 04010L103 $6.1M 0.90% 330,490 SH
37 PFIZER INC PFE 717081103 $5.8M 0.85% 241,130 SH
38 VANGUARD MUN BD FDS VCRM 922907712 $5.7M 0.83% 74,350 SH
39 BERKSHIRE HATHAWAY INC DEL BRK.B 084670702 $5.6M 0.81% 11,115 SH
40 JPMORGAN CHASE & CO JPM 46625H100 $5.4M 0.79% 16,491 SH
41 GOLDMAN SACHS GROUP INC GS 38141G104 $5.3M 0.78% 5,289 SH
42 WEYERHAEUSER CO WY 962166104 $5.2M 0.76% 217,161 SH
43 ISHARES TR IBB 464287556 $5.2M 0.75% 27,113 SH
44 VANGUARD SCOTTSDALE FDS VGIT 92206C706 $5.0M 0.72% 84,004 SH
45 VANECK ETF TRUST GDX 92189F106 $4.9M 0.72% 65,269 SH
46 DEERE & CO DE 244199105 $4.8M 0.71% 7,607 SH
47 CVS HEALTH CORP CVS 126650100 $4.6M 0.67% 44,074 SH
48 CHEWY INC CHWY 16679L109 $4.3M 0.63% 220,891 SH
49 COSTCO WHOLESALE CORPORATION COST 22160K105 $4.2M 0.62% 4,540 SH
50 ELEVANCE HEALTH INC FORMERLY ELV 036752103 $4.2M 0.61% 10,734 SH
Filing History
Period Filed AUM Holdings Accession
2026-06-30 2026-07-27 $683.7M 359 0001587192-26-000003
2026-03-31 2026-05-01 $588.1M 337 0001587192-26-000002
2025-12-31 2026-02-05 $549.7M 332 0001587192-26-000001
Filer Information
Address
1708 SHATTUCK AVENUE
BERKELEY, CA 94709
Phone
(510) 549-3534
Filing Manager
Blume Capital Management, Inc.
BERKELEY, CA
Signatory
Jeffrey V. St.Claire
President