Q2 2026 13F · SEC CIK 1768635

O'Brien Greene & Co. Inc

Wealth managerFiled 2026-08-06 for Q2 2026. Open the filing ↗ · All SEC filings ↗

Reported 13F value: $362.4M
Reported positions: 141
Top holdings a year, 3 yrs: +16.2%
Assets under management: $464.3M

O'Brien Greene & Co. Inc is a wealth manager that reported 141 positions worth $362.4M in its Q2 2026 13F, filed 2026-08-06. Its largest holdings were Interactive Brokers Group in (IBKR, 5.9%), Sprott Asset Management LP (PHYS, 4.9%), Apple Inc (AAPL, 4.4%). A portfolio copying its top holdings returned 16.2% a year over the last 3 years, against 20.4% for the S&P 500.

O'Brien Greene & Co. Inc holdings largest 50 of 141 positions.

Weights are shares of the filer's total reported 13F value, compared with Q1 2026. Share changes may reflect splits; weight changes also reflect price moves. A 13F shows long US-listed positions only, up to 135 days after the fact.

O'Brien Greene & Co. Inc 13F holdings
Stock	% of 13F value	Q1 2026	Shares	Share change	Reported value
IBKRInteractive Brokers Group in	5.9%	4.8%	245,047	-3.0%	$21.3M
PHYSSprott Asset Management LP	4.9%	5.8%	591,138	+1.7%	$17.8M
AAPLApple Inc	4.4%	4.0%	55,288	-0.0%	$16.0M
BRK-BBerkshire Hathaway Inc Del	3.8%	3.8%	27,856	+0.1%	$13.9M
FLBRFranklin Templeton ETF Tr	3.6%	4.1%	613,424	+0.7%	$13.1M
VLOValero Energy Corp	3.5%	3.5%	48,626	-3.9%	$12.7M
WMBWilliams Cos	3.2%	3.2%	157,164	+1.3%	$11.7M
WMTWalmart Inc	3.2%	3.6%	101,511	-0.7%	$11.5M
UNPUnion Pac Corp	3.1%	2.8%	41,065	+0.7%	$11.2M
EOGEog Res Inc	3.0%	3.4%	83,607	+0.2%	$10.8M
AMGNAmgen Inc	3.0%	3.0%	29,941	+1.0%	$10.8M
FNVFranco Nev Corp	2.8%	3.4%	48,541	-0.1%	$10.1M
CWCurtiss Wright Corp	2.7%	2.5%	12,992	+0.4%	$9.8M
CSCOCisco Sys Inc	2.7%	2.9%	82,155	-37.0%	$9.6M
ABBNYAbb Ltd Sp Adr	2.7%	1.9%	88,747	+6.4%	$9.6M
CBOECboe Global Mkts Inc	2.6%	3.0%	38,093	+0.6%	$9.2M
NTRNutrien Ltd	2.3%	2.8%	133,187	+1.2%	$8.4M
MSFTMicrosoft Corp	2.3%	2.3%	21,930	-0.3%	$8.2M
NEENextera Energy Inc	2.2%	2.4%	92,579	-0.1%	$8.1M
DHRDanaher Corp Del	2.1%	2.2%	40,413	+0.3%	$7.7M
SPGIS&p Global Inc	1.9%	2.1%	16,914	-1.0%	$6.9M
CNSWFConstellation Software Ord Shs	1.8%	0.5%	3,411	+254.2%	$6.4M
VLTOVeralto Corp	1.7%	1.7%	68,913	+0.1%	$6.1M
HONAHoneywell Aerospace Inc	1.6%	—	26,135	—	$5.8M
SONYSony Group Corp	1.4%	1.4%	254,368	+8.2%	$5.1M
BSXBoston Scientific Corp	1.2%	1.5%	99,578	+19.4%	$4.2M
GLNGGolar Lng Ltd Shs	1.1%	1.2%	78,200	+0.0%	$3.9M
SNEXStonex Group Inc	0.9%	0.7%	28,474	-3.4%	$3.4M
COSTCostco Wholesale Corporation	0.9%	1.0%	3,404	-0.6%	$3.2M
CMICummins Inc	0.9%	0.7%	4,373	-3.1%	$3.1M
CVXChevron Corporation	0.7%	0.9%	15,157	-0.1%	$2.5M
JPMJpmorgan Chase & Co	0.7%	0.7%	7,668	-11.3%	$2.5M
EMREmerson Elec Co	0.6%	0.6%	16,344	-1.8%	$2.3M
GWWWw Grainger Inc	0.6%	0.5%	1,675	+0.0%	$2.3M
ABBVAbbvie Inc	0.6%	0.5%	8,543	-0.1%	$2.1M
ADPAutomatic Data Processing in	0.6%	0.6%	9,035	-6.3%	$2.0M
IJRIshares Tr	0.5%	0.5%	13,106	-5.0%	$1.9M
KOCoca Cola Co	0.5%	0.5%	22,761	-0.7%	$1.8M
WMWaste Mgmt Inc Del	0.5%	0.5%	8,200	+0.0%	$1.8M
WPLCFWise Group PLC	0.5%	—	145,000	—	$1.7M
EBAYEbay Inc.	0.5%	0.4%	15,266	+0.0%	$1.7M
JNJJohnson & Johnson	0.4%	0.4%	6,146	-2.4%	$1.6M
RIORio Tinto PLC	0.4%	0.4%	16,320	+7.9%	$1.5M
GLWCorning Inc	0.4%	—	5,401	—	$1.4M
SIISprott Inc	0.4%	—	12,015	—	$1.3M
GOOGLAlphabet Inc	0.3%	0.4%	3,470	-22.0%	$1.2M
AXONAxon Enterprise Inc	0.3%	—	2,140	—	$1.2M
VIRTVirtu Finl Inc	0.3%	—	20,000	—	$1.2M
ECEcopetrol SA	0.3%	—	83,000	—	$1.2M
SKYChampion Homes Inc	0.3%	0.3%	13,276	-3.6%	$1.2M

What O'Brien Greene & Co. Inc bought and sold in Q2 2026, against Q1 2026.

New positions

Q1 2026's filing was too long to tell new positions apart.

Share counts compared with the Q1 2026 13F; a split also changes share counts. The latest filing lists more than 50 positions, so a position that left the top 50 may still be held.

How the holdings did against the S&P 500.

1 year: +25.5% /yr; S&P 500 +20.1%
3 years: +16.2% /yr; S&P 500 +20.4%
5 years: +9.9% /yr; S&P 500 +11.6%

A portfolio of the filer's 20 largest 13F positions, weighted by value, bought the trading day after each 13F was filed and held until the next one was: what copying this filer could have earned. 13Fs show long US-listed positions only, so this is an estimate of the stock picks, not the fund's reported returns.

Reported 13F value by quarter.

13F value by quarter
Quarter	13F value	Positions
Q2 2026	$362.4M	141
Q1 2026	$353.3M	133
Q4 2025	$336.8M	136
Q3 2025	$325.2M	128
Q2 2025	$305.7M	135
Q1 2025	$298.1M	135
Q4 2024	$308.0M	133
Q3 2024	$321.1M	135
Q2 2024	$315.8M	138
Q1 2024	$304.1M	130
Q4 2023	$284.4M	127
Q3 2023	$273.4M	127

Questions about O'Brien Greene & Co. Inc's portfolio

What stocks does O'Brien Greene & Co. Inc own?

O'Brien Greene & Co. Inc's latest 13F, for Q2 2026 and filed Aug 6, 2026, lists 141 positions worth $362.4M. The largest are Interactive Brokers Group in (IBKR) at 5.9%, Sprott Asset Management LP (PHYS) at 4.9%, Apple Inc (AAPL) at 4.4%, Berkshire Hathaway Inc Del (BRK-B) at 3.8% and Franklin Templeton ETF Tr (FLBR) at 3.6%.

What did O'Brien Greene & Co. Inc buy last quarter?

In Q2 2026, O'Brien Greene & Co. Inc added Constellation Software Ord Shs (CNSWF) (+254.2% shares), Boston Scientific Corp (BSX) (+19.4% shares) and Sony Group Corp (SONY) (+8.2% shares), compared with its Q1 2026 filing.

What did O'Brien Greene & Co. Inc sell last quarter?

In Q2 2026, O'Brien Greene & Co. Inc cut from its top 50 Lyondellbasell Industries NV (LYB), cut from its top 50 Wise Plc (WPLCF), cut from its top 50 Black Stone Minerals L P (BSM), cut from its top 50 Talen Energy Corp (TLN), cut from its top 50 B3 Sa Brasil Bolsa Balcao (BOLSY), Cisco Sys Inc (CSCO) (-37.0% shares), Alphabet Inc (GOOGL) (-22.0% shares) and Jpmorgan Chase & Co (JPM) (-11.3% shares), compared with its Q1 2026 filing.

How has O'Brien Greene & Co. Inc's portfolio performed?

A portfolio copying O'Brien Greene & Co. Inc's 20 largest 13F holdings each quarter, from the day each filing was public, returned +16.2% a year over the last 3 years, against +20.4% for the S&P 500. Over 1 year: +25.5% against +20.1%. Over 5 years: +9.9% a year against +11.6%.

When is O'Brien Greene & Co. Inc's next 13F filing due?

13F filings are due 45 days after each quarter ends. O'Brien Greene & Co. Inc's filing for the quarter ending Sep 30, 2026 is due by Nov 14, 2026; this page updates the day after it is published.

How much money does O'Brien Greene & Co. Inc manage?

O'Brien Greene & Co. Inc reported $464.3M of regulatory assets under management on its latest SEC Form ADV. Its 13F, which covers only US-listed stocks and options, totals $362.4M.