Institutional Manager · CIK 0000826000

POTOMAC FUND MANAGEMENT INC /ADV

BETHESDA, MD · File #028-24973

Latest AUM

$2.71B

Positions

108

Top-10 Concentration

89.7%

Filings

Portfolio Value Over Time

2024-12

2025-03

2025-06

2025-09

2025-12

Biggest QoQ Changes

Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.

Action	Issuer	Ticker / CUSIP	Δ Shares	Flow ($)	Price Effect
NEW	VANGUARD INDEX FDS	922908363	+2,653,203	+$1.66B	$0
REDUCE	ISHARES TR	46436E718	-8,498,548	-$853.1M	-$3.0M
EXITED	Direxion Daily S&P 500 3X Bull Shares ETF	25459W862	-1,105,270	-$234.2M	$0
EXITED	ProShares UltraPro S&P 500	74347X864	-2,095,597	-$233.6M	$0
REDUCE	BONDBLOXX ETF TRUST	09789C788	-797,256	-$40.1M	-$1.5M
NEW	ISHARES TR	46435U853	+676,301	+$25.3M	$0
NEW	VANGUARD WHITEHALL FDS	921946885	+374,164	+$25.2M	$0
NEW	BONDBLOXX ETF TRUST	09789C879	+564,718	+$25.2M	$0
ADD	SELECT SECTOR SPDR TR	81369Y209	+148,774	+$23.0M	+$32,547
NEW	VANGUARD WORLD FD	92204A504	+79,799	+$23.0M	$0

Sector Allocation

Financials

0.9%$25.3M

Technology

0.4%$10.3M

Healthcare

0.2%$6.4M

Consumer Discretionary

0.2%$5.2M

0.1%$3.9M

0.1%$1.7M

0.1%$1.5M

0.0%$1.0M

0.0%$1.1M

0.0%$580,703

Filing History

Feb 13, 202613F HOLDINGS REPORTQ/E Dec 2025108 pos · $2.71B
Nov 12, 202513F HOLDINGS REPORTQ/E Sep 2025103 pos · $2.36B
Oct 2, 202513F HOLDINGS REPORT (Amended)Q/E Sep 202597 pos · $1.75B
Oct 2, 202513F HOLDINGS REPORT (Amended)Q/E Sep 202597 pos · $1.70B
Oct 2, 202513F HOLDINGS REPORT (Amended)Q/E Sep 202572 pos · $227.5M
Aug 14, 202513F HOLDINGS REPORTQ/E Jun 202578 pos · $131.3M
May 14, 202513F HOLDINGS REPORTQ/E Mar 202566 pos · $97.4M
Feb 12, 202513F HOLDINGS REPORTQ/E Dec 202477 pos · $111.5M

Top 20 Holdings — Dec 2025

#	Issuer	Ticker	Shares	Value	% of Portfolio
1	VANGUARD INDEX FDS	922908363	2,653,203	$1.66B	62.05%
2	BONDBLOXX ETF TRUST	09789C788	8,093,603	$406.7M	15.17%
3	ISHARES TR	46436E718	855,521	$85.9M	3.20%
4	NORTHERN LTS FD TR IV	NTRSO	824,013	$53.2M	1.98%
5	BONDBLOXX ETF TRUST	09789C705	1,174,307	$48.3M	1.80%
6	BONDBLOXX ETF TRUST	09789C887	1,264,638	$48.1M	1.79%
7	ISHARES TR	46435U853	676,301	$25.3M	0.94%
8	VANGUARD WHITEHALL FDS	921946885	374,164	$25.2M	0.94%
9	BONDBLOXX ETF TRUST	09789C879	564,718	$25.2M	0.94%
10	LITMAN GREGORY FDS TR	53700T827	859,178	$24.1M	0.90%
11	SELECT SECTOR SPDR TR	81369Y209	150,858	$23.4M	0.87%
12	WISDOMTREE TR	WT	160,156	$23.1M	0.86%
13	VANGUARD WORLD FD	92204A504	79,799	$23.0M	0.86%
14	VANGUARD INDEX FDS	922908769	68,273	$22.9M	0.85%
15	SPDR SERIES TRUST	78464A359	255,798	$22.8M	0.85%
16	GLOBAL X FDS	37960A669	584,970	$14.1M	0.52%
17	VANECK ETF TRUST	92189F676	38,939	$14.0M	0.52%
18	ISHARES TR	464287390	459,796	$14.0M	0.52%
19	ISHARES TR	464287556	81,760	$13.8M	0.51%
20	GLOBAL X FDS	37954Y848	163,889	$13.7M	0.51%