Q2 2026 13F · SEC CIK 2021242

Sienna Gestion

Investment managerFiled 2026-08-13 for Q2 2026. Open the filing ↗ · All SEC filings ↗

Reported 13F value: $1.7B
Reported positions: 177
Holdings vs S&P 500, 3 yrs: —
Average holding period: 1.6 yrs

Sienna Gestion is an investment manager that reported 177 positions worth $1.7B in its Q2 2026 13F, filed 2026-08-13. Its largest holdings were Nvidia Corporation (NVDA, 7.2%), Apple Inc (AAPL, 6.0%), Microsoft Corp (MSFT, 4.7%).

Sienna Gestion holdings largest 50 of 177 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.

Sienna Gestion 13F holdings
Stock	% of 13F value	Q1 2026	Shares	Share change	Reported value
NVDANvidia Corporation	7.2%	7.6%	622,392	-11.4%	$122.7M
AAPLApple Inc	6.0%	6.2%	357,877	-6.5%	$102.0M
MSFTMicrosoft Corp	4.7%	5.5%	215,275	-7.0%	$80.2M
GOOGLAlphabet Inc	4.1%	—	196,701	—	$70.3M
AVGOBroadcom Inc	2.5%	2.4%	115,411	-6.6%	$43.5M
MUMicron Technology Inc	2.3%	0.8%	33,732	-9.6%	$39.1M
TSLATesla Inc	1.8%	1.9%	73,310	-7.5%	$30.5M
AMATApplied Matls Inc	1.7%	1.3%	41,957	-28.7%	$29.5M
JPMJpmorgan Chase & Co	1.7%	1.8%	86,434	-8.6%	$28.8M
GOOGAlphabet Inc	1.7%	—	79,527	—	$28.2M
NBISNebius Group N.v.	1.6%	—	104,922	—	$27.7M
INTCIntel Corp	1.6%	—	160,096	—	$26.8M
LLYEli Lilly & Co	1.6%	1.4%	21,563	-9.1%	$26.8M
CSCOCisco Sys Inc	1.6%	1.7%	222,868	-34.1%	$26.5M
HDHome Depot Inc	1.4%	1.5%	69,193	-3.1%	$24.5M
AMDAdvanced Micro Devices Inc	1.3%	—	41,833	—	$22.8M
MFCManulife Finl Corp	1.3%	1.3%	552,839	-8.5%	$22.7M
ATOAtmos Energy Corp	1.2%	1.5%	117,688	-7.3%	$20.8M
JNJJohnson & Johnson	1.2%	—	78,424	—	$20.5M
LRCXLam Research Corp	1.2%	0.7%	49,012	-5.3%	$20.4M
00924D105Blackrock Inc	1.2%	1.4%	21,173	-7.4%	$20.3M
MAMastercard Incorporated	1.2%	1.3%	38,910	-4.4%	$20.1M
PGProcter & Gamble Co	1.2%	1.3%	132,617	-3.9%	$19.9M
STTState Str Corp	1.1%	1.0%	111,011	-10.2%	$19.1M
CCitigroup Inc	1.1%	—	127,242	—	$18.3M
TTTrane Technologies PLC	1.0%	1.0%	36,319	-4.3%	$17.6M
AERAercap Holdings NV	1.0%	1.6%	111,189	-38.1%	$16.6M
WDCWestern Digital Corp Com	0.9%	1.1%	23,164	-65.6%	$15.3M
WABWabtec	0.9%	1.0%	55,581	-11.9%	$15.1M
WMTWalmart Inc	0.8%	—	121,903	—	$14.1M
VZVerizon Communications Inc	0.8%	1.4%	313,745	-27.1%	$14.0M
CMCanadian Imperial Bank of Co	0.8%	0.7%	121,221	+4.3%	$13.9M
GDGeneral Dynamics Corp	0.8%	1.1%	38,612	-19.6%	$13.6M
TRVTravelers Companies Inc	0.8%	0.8%	40,090	-9.3%	$13.5M
AMPAmeriprise Finl Inc	0.8%	0.9%	29,403	-10.8%	$13.3M
ACNAccenture PLC Ireland	0.8%	1.0%	104,137	+29.6%	$13.1M
GEVGe Vernova Inc	0.8%	—	11,516	—	$12.8M
TROWPrice T Rowe Group Inc	0.8%	—	110,989	—	$12.8M
VLOValero Energy Corp	0.7%	0.9%	46,818	-15.3%	$12.6M
COSTCostco Wholesale Corporation	0.7%	—	12,872	—	$12.3M
BNYBank of Ny Mellon Corp	0.7%	1.0%	83,074	-36.5%	$12.1M
WSMWilliams Sonoma Inc	0.7%	—	49,561	—	$12.0M
AEMAgnico Eagle Mines Ltd	0.7%	1.0%	77,400	-6.6%	$12.0M
EMEEmcor Group Inc	0.7%	—	14,412	—	$11.9M
PLDPrologis Inc	0.7%	0.7%	84,347	+3.0%	$11.8M
ANETArista Networks Inc	0.7%	—	71,011	—	$11.8M
EDConsolidated Edison Inc	0.7%	—	103,283	—	$11.7M
VVisa Inc	0.7%	—	33,812	—	$11.7M
BKNGBooking Holdings Inc	0.7%	0.7%	61,956	+2167.0%	$11.4M
CAHCardinal Health Inc	0.7%	—	46,425	—	$11.1M

What Sienna Gestion bought and sold in Q2 2026, against Q1 2026.

New positions

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

Added to

BKNG Booking Holdings Inc+2167.0% shares
ACN Accenture PLC Ireland+29.6% shares

Reduced

WDC Western Digital Corp Com-65.6% shares
AER Aercap Holdings NV-38.1% shares
BNY Bank of Ny Mellon Corp-36.5% shares
CSCO Cisco Sys Inc-34.1% shares
AMAT Applied Matls Inc-28.7% shares
VZ Verizon Communications Inc-27.1% shares
GD General Dynamics Corp-19.6% shares
VLO Valero Energy Corp-15.3% shares

Left the top 50

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: +24.8% /yr; S&P 500 +20.1%
3 years: —
5 years: —

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	$1.7B	177
Q1 2026	$1.5B	136
Q4 2025	$1.7B	150
Q3 2025	$1.4B	159
Q2 2025	$1.5B	159
Q1 2025	$1.2B	159
Q4 2024	$1.5B	201
Q3 2024	$1.5B	207
Q2 2024	$1.1B	159
Q1 2024	$1.2B	160

Questions about Sienna Gestion's portfolio

What stocks does Sienna Gestion own?

Sienna Gestion's latest 13F, for Q2 2026 and filed Aug 13, 2026, lists 177 positions worth $1.7B. The largest are Nvidia Corporation (NVDA) at 7.2%, Apple Inc (AAPL) at 6.0%, Microsoft Corp (MSFT) at 4.7%, Alphabet Inc (GOOGL) at 4.1% and Broadcom Inc (AVGO) at 2.5%.

What did Sienna Gestion buy last quarter?

In Q2 2026, Sienna Gestion added Booking Holdings Inc (BKNG) (+2167.0% shares) and Accenture PLC Ireland (ACN) (+29.6% shares), compared with its Q1 2026 filing.

What did Sienna Gestion sell last quarter?

In Q2 2026, Sienna Gestion cut from its top 50 Royal Bk Cda (RY), cut from its top 50 Intuit (INTU), cut from its top 50 Analog Devices Inc (ADI), cut from its top 50 Phillips 66 (PSX), cut from its top 50 Veeva Sys Inc (VEEV), Western Digital Corp Com (WDC) (-65.6% shares), Aercap Holdings NV (AER) (-38.1% shares) and Bank of Ny Mellon Corp (BNY) (-36.5% shares), compared with its Q1 2026 filing.

When is Sienna Gestion's next 13F filing due?

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