HEFFERNAN ADVISORY, INC

Quarterly 13F snapshot: US-listed longs only, no performance figures — 13F data cannot support them.

Portfolio value: $149M
Positions: 57
Quarter ended: September 30, 2026
Filed: October 13, 2026

Reported portfolio value by quarter (4 quarters reported)

$149M $104M

Q4 25 Q1 26 Q2 26 Q3 26

$104M in Q4 2025 → $149M now. Hover for any quarter.

Holdings

As reported for the quarter ended September 30, 2026. Activity is the change in share count since the prior quarter's filing.

Holding	% of portfolio	Activity	Shares	Value
DE Dimensional ETF Trust	31.3%	Added 1.0%	1,160,813	$46.6M
GA Gallagher Arthur J & Co	19.4%	New	126,416	$28.8M
DE Dimensional ETF Trust	10.1%	Added 20%	338,172	$15M
DE Dimensional ETF Trust	6.0%	Added 18%	191,280	$8.89M
DE Dimensional ETF Trust	5.5%	Added 20%	219,143	$8.24M
DE Dimensional ETF Trust	4.0%	Added 21%	117,800	$6.02M
DE Dimensional ETF Trust	2.5%	Added 19%	94,472	$3.75M
LM Legg Mason ETF Invt	2.4%	Trimmed 1.8%	87,418	$3.62M
DE Dimensional ETF Trust	2.2%	Added 30%	62,400	$3.24M
ST Seagate Technology Hldngs Pl	1.0%	Added 83%	1,650	$1.52M
VI Vanguard Index Fds	0.9%	Trimmed 0.3%	3,659	$1.37M
ES Etfis Ser Tr I	0.9%	Trimmed 0.2%	19,101	$1.34M
SS State Str SPDR S&P 500 ETF T	0.8%	Added 134%	1,590	$1.21M
DE Dimensional ETF Trust	0.8%	Unchanged	25,930	$1.19M
VW Vanguard World Fd	0.7%	Added 110%	8,400	$1.06M
IT Ishares Tr	0.6%	Unchanged	32,664	$838K
IT Ishares Tr	0.6%	Unchanged	33,092	$835K
IT Ishares Tr	0.6%	Unchanged	33,148	$833K
AE Alps ETF Tr	0.5%	Trimmed 0.5%	14,859	$771K
DE Dimensional ETF Trust	0.5%	Added 24%	28,100	$760K
IT Ishares Tr	0.5%	Added 204%	2,732	$759K
Mastercard Incorporated	0.5%	Added 16%	1,274	$703K
Marvell Technology Inc	0.4%	Added 98%	2,369	$626K
Microsoft Corp	0.4%	Added 42%	1,086	$557K
Visa Inc	0.4%	Added 40%	1,458	$524K
IT Ishares Tr	0.3%	Added 100%	4,000	$501K
Advanced Micro Devices Inc	0.3%	New	810	$496K
Palo Alto Networks Inc	0.3%	Added 102%	1,210	$481K
Apple Inc	0.3%	Added 0.7%	1,402	$467K
Alphabet Inc	0.3%	New	1,305	$449K
Meta Platforms Inc	0.3%	New	553	$401K
Ciena Corp	0.2%	Added 104%	1,020	$359K
Amazon Com Inc	0.2%	New	1,376	$343K
Flex Ltd	0.2%	Added 24%	3,100	$341K
Xpo Inc	0.2%	New	1,920	$338K
CH Crowdstrike Hldgs Inc	0.2%	New	1,260	$334K
DI Dycom Inds Inc	0.2%	Added 74%	1,220	$328K
IT Ishares Tr	0.2%	New	2,250	$320K
Nvidia Corporation	0.2%	New	1,381	$315K
VI Vanguard Index Fds	0.2%	New	1,364	$295K
Micron Technology Inc	0.2%	Added 38%	275	$293K
DE Dimensional ETF Trust	0.2%	Added 0.3%	4,041	$269K
Jpmorgan Chase & Co	0.2%	New	803	$266K
AM Applied Matls Inc	0.2%	Added 6.3%	510	$261K
SS Select Sector SPDR Tr	0.2%	New	1,300	$254K
Palantir Technologies Inc	0.2%	New	1,360	$254K
United Rentals Inc	0.2%	Added 25%	250	$250K
OR Old Rep Intl Corp	0.2%	Unchanged	6,509	$243K
Zimmer Biomet Holdings Inc	0.2%	New	2,691	$239K
SS SPDR Series Trust	0.2%	New	1,900	$234K
IT Ishares Tr	0.2%	New	1,689	$230K
DE Dimensional ETF Trust	0.2%	Added 0.2%	4,385	$230K
VW Vanguard World Fd	0.2%	Added 0.4%	1,408	$227K
CP Camden Ppty Tr	0.1%	Added 0.9%	2,284	$221K
Exxonmobil Holdings Corp	0.1%	New	1,312	$214K
Alphabet Inc	0.1%	Added 7.1%	615	$210K
Global Net Lease Inc	0.1%	Unchanged	12,896	$107K

Timeline of changes

What changed each quarter, from the filings' own share counts. Largest moves first; most recent 3 quarters.

Q3 2026

quarter ended September 30, 2026 · filed October 13, 2026

Company	Action	Shares changed	Value of change	% of portfolio
GA Gallagher Arthur J & Co	New	+126,416	+$28.8M	19.4%
DE Dimensional ETF Trust	Exited	−151,842	−$12.4M	—
DE Dimensional ETF Trust	Added	+55,417	+$2.46M	10.1%
DE Dimensional ETF Trust	Added	+37,054	+$1.39M	5.5%
DE Dimensional ETF Trust	Added	+29,520	+$1.37M	6.0%
DE Dimensional ETF Trust	Added	+20,733	+$1.06M	4.0%
DE Dimensional ETF Trust	Added	+14,357	+$745K	2.2%
SS State Str SPDR S&P 500 ETF T	Added	+910	+$694K	0.8%
ST Seagate Technology Hldngs Pl	Added	+750	+$692K	1.0%
DE Dimensional ETF Trust	Added	+14,908	+$592K	2.5%

Showing the 10 largest of 54 changes.

Q2 2026

quarter ended June 30, 2026 · filed July 21, 2026

Company	Action	Shares changed	Value of change	% of portfolio
DE Dimensional ETF Trust	Trimmed	−22,723	−$959K	40.6%
ST Seagate Technology Hldngs Pl	New	+900	+$869K	0.7%
DE Dimensional ETF Trust	Added	+11,197	+$535K	6.5%
SS State Str SPDR S&P 500 ETF T	New	+680	+$508K	0.4%
VW Vanguard World Fd	New	+4,000	+$478K	0.4%
Flex Ltd	New	+2,500	+$405K	0.3%
Apple Inc	New	+1,392	+$403K	0.3%
Marvell Technology Inc	New	+1,196	+$356K	0.3%
DI Dycom Inds Inc	New	+700	+$354K	0.3%
AM Applied Matls Inc	New	+480	+$347K	0.3%

Showing the 10 largest of 38 changes.

Q1 2026

quarter ended March 31, 2026 · filed April 27, 2026

Company	Action	Shares changed	Value of change	% of portfolio
DE Dimensional ETF Trust	Added	+19,394	+$819K	45.9%
DE Dimensional ETF Trust	Added	+11,004	+$793K	9.9%
DE Dimensional ETF Trust	Added	+20,285	+$788K	9.9%
DE Dimensional ETF Trust	Added	+13,407	+$642K	6.7%
DE Dimensional ETF Trust	Added	+8,630	+$453K	4.5%
DE Dimensional ETF Trust	Added	+11,945	+$424K	5.8%
DE Dimensional ETF Trust	Added	+4,575	+$248K	2.3%
Palantir Technologies Inc	Exited	−1,360	−$242K	—
CP Camden Ppty Tr	Exited	−1,964	−$216K	—
DE Dimensional ETF Trust	Exited	−4,354	−$204K	—

Showing the 10 largest of 20 changes.

Comments