Alpha and Omega Semiconductor

AOSL • NASDAQ

Alpha and Omega Semiconductor is a semiconductors company in the technology sector on NASDAQ, led by Stephen Chang, with a market cap of $611.8M. As of Q3 2025, 74% of shares are held by 183 institutional investors, with BlackRock, Inc. as the largest holder at 12.8%.

Chief Executive OfficerStephen Chang

Market Cap$611.8M

Semiconductors

Technology

Employees2.5K

Websiteaosmd.com

Country

United States of America

Overview

Overview of institutional ownership in AOSL as of Q3 2025 with a market cap of $840.0M

All Institutions

Institutions: 183
Value Held: $619.0M
Shares Held: 22.1M
Avg Position: $3.4M
Median Position: $302.0K

Hedge Funds

Hedge Funds: 23
Value Held: $43.6M
Shares Held: 1.6M
Avg Position: $1.9M
Median Position: $629.8K

Ownership Breakdown

Institutional (non-HF)

68.5%

$575.4M

Hedge Funds

5.19%

$43.6M

Retail & Other

26.31%

$221.0M

Based on market cap of $840.0M as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.

Biggest Investors

Institutions with the largest positions in AOSL as of Q3 2025

Institution	Key People	Position Value	Ownership	Owned Since	Total AUM (Long)
B BlackRock, Inc. Institution	-	$107.5M 0.00% of portfolio	12.80% 3.8M shares	Q1 2016 Held for 9y 8m	$5.67T
VANGUARD GROUP INC Institution	Salim Ramji CEO	$68.6M 0.00% of portfolio	8.17% 2.5M shares	≤ Q2 2013 Held for 12y 5m+	$6.69T
DIMENSIONAL FUND ADVISORS LP Long Only Manager	David Paul Butler CEO	$47.2M 0.01% of portfolio	5.62% 1.7M shares	≤ Q2 2013 Held for 12y 5m+	$466.32B
M MANUFACTURERES LIFE INSURANCE CO Institution	-	$43.5M 0.04% of portfolio	5.18% 1.6M shares	Q2 2019 Held for 6y 5m	$120.17B
STATE STREET CORP Institution	Ronald P. O'Hanley CEO	$33.9M 0.00% of portfolio	4.03% 1.2M shares	≤ Q2 2013 Held for 12y 5m+	$2.88T
WELLINGTON MANAGEMENT CO LLP Long Only Manager	Jean Marie Hynes CEO	$24.2M 0.00% of portfolio	2.88% 865.0K shares	Q2 2023 Held for 2y 5m	$571.21B
Robeco Investment Management, Inc. Long Only Manager	Joseph Francis Feeney CEO	$22.0M 0.02% of portfolio	2.62% 786.6K shares	Q3 2022 Held for 3y 2m	$97.8B
R ROBECOSAM AG Institution	-	$22.0M 0.49% of portfolio	2.61% 785.3K shares	Q1 2025 Held for 8 months	$4.4B
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	Dan Michael Berkovitz Chairman	$17.8M 0.01% of portfolio	2.12% 637.9K shares	Q2 2020 Held for 5y 5m	$121.98B
GEODE CAPITAL MANAGEMENT LLC ETF Provider	David Kenneth Lane CEO	$17.0M 0.00% of portfolio	2.02% 607.5K shares	≤ Q2 2013 Held for 12y 5m+	$1.57T

Net Capital Flow

Institutional buying and selling activity for AOSL in Q3 2025

Traded: +$11.8M
Buyers: 99
Sellers: 64
Total Bought: +$41.3M
Total Sold: −$29.5M
Avg Position: $3.1M

Biggest Buyers

Institution	Net Bought	Current Position
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	+$6.5M +232.8K shares	$17.8M 637.9K shares
M MANUFACTURERES LIFE INSURANCE CO Institution	+$4.0M +143.6K shares	$43.5M 1.6M shares
S SG Americas Securities, LLC Institution	+$3.6M +127.3K shares	$3.6M 127.3K shares
WELLINGTON MANAGEMENT CO LLP Long Only Manager	+$3.2M +113.1K shares	$24.2M 865.0K shares
A Acuitas Investments, LLC Fund of Funds	+$1.9M +67.1K shares	$6.7M 240.9K shares
JPMORGAN CHASE & CO Institution	+$1.9M +66.7K shares	$4.4M 158.8K shares
Empowered Funds, LLC ETF Provider	+$1.5M +53.0K shares	$1.5M 53.0K shares
B BRIDGEWAY CAPITAL MANAGEMENT INC Long Only Manager	+$1.3M +47.8K shares	$2.0M 73.0K shares
UBS Group AG Institution	+$1.3M +44.9K shares	$1.9M 66.9K shares
SCHWAB CHARLES INVESTMENT MANAGEMENT INC Long Only Manager	+$1.2M +43.6K shares	$9.6M 344.6K shares

Biggest Sellers

Institution	Net Sold	Current Position
Robeco Investment Management, Inc. Long Only Manager	−$9.0M −322.7K shares	$22.0M 786.6K shares
GOLDMAN SACHS GROUP INC Institution	−$2.8M −98.6K shares	$10.4M 370.4K shares
VICTORY CAPITAL MANAGEMENT INC Long Only Manager	−$2.1M −80.3K shares	Sold Off 0 shares
STATE STREET CORP Institution	−$1.9M −66.7K shares	$33.9M 1.2M shares
C Cubist Systematic Strategies, LLC Institution	−$1.1M −44.0K shares	Sold Off 0 shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	−$989.1K −35.4K shares	$613.1K 21.9K shares
TWO SIGMA INVESTMENTS LLC Hedge Fund•Multi-Strategy	−$967.0K −34.6K shares	$4.5M 162.3K shares
TUDOR INVESTMENT CORP ET AL Hedge Fund•Multi-Strategy	−$938.6K −33.6K shares	$305.1K 10.9K shares
DIMENSIONAL FUND ADVISORS LP Long Only Manager	−$910.6K −32.6K shares	$47.2M 1.7M shares
BANK OF AMERICA CORP /DE/ Institution	−$894.3K −32.0K shares	$5.0M 179.3K shares

Entry and Exit Activity

Institutions that initiated new positions or completely exited AOSL in Q3 2025

New Positions: 14
New Value: $1.1M
Exited Positions: 15
Exited Value: $5.7M

New Positions

Institution	Position Value
Jain Global LLC Hedge Fund•Multi-Strategy	$302.0K 10.8K shares
F FIRST CITIZENS BANK & TRUST CO Institution	$259.0K 9.3K shares
Envestnet Portfolio Solutions, Inc. Long Only Manager	$248.9K 8.9K shares
FourThought Financial Partners, LLC RIA/Wealth	$214.7K 7.7K shares
ISAM Funds Ltd Hedge Fund•Quant	$91.2K 3.3K shares
Transamerica Financial Advisors, Inc. Institution	$7.3K 262.0 shares
S Salomon & Ludwin, LLC Institution	$6.2K 218.0 shares
O Optiver Holding B.V. Institution	$3.7K 134.0 shares
C Cedar Mountain Advisors, LLC RIA/Wealth	$1.3K 46.0 shares
Tortoise Investment Management, LLC RIA/Wealth	$755.0 27.0 shares

Exited Positions

Institution	Previous Position
VICTORY CAPITAL MANAGEMENT INC Long Only Manager	$2.1M 80.3K shares
C Cubist Systematic Strategies, LLC Institution	$1.1M 44.0K shares
Kingstone Capital Partners Texas, LLC RIA/Wealth	$640.5K 25.0K shares
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$525.3K 20.5K shares
Geneos Wealth Management Inc. RIA/Wealth	$425.8K 16.6K shares
VOLORIDGE INVESTMENT MANAGEMENT, LLC Hedge Fund•Multi-Strategy	$363.0K 14.1K shares
T TEXAS PERMANENT SCHOOL FUND Institution	$320.5K 12.5K shares
L LPL Financial LLC Institution	$216.1K 8.4K shares
P Point72 Asia Pte. Ltd. Institution	$25.1K 980.0 shares
Walleye Trading Advisors, LLC Hedge Fund•Multi-Strategy	$22.3K 870.0 shares

Options Activity

Institutions with the largest Call and Put options positions in AOSL as of Q3 2025

Call Positions: 6
Call Value: $2.3M
Put Positions: 5
Put Value: $2.1M

Call Positions

Institution	Position Value
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$911.5K 326.0 contracts
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$766.1K 274.0 contracts
J JANE STREET GROUP, LLC Institution	$318.7K 114.0 contracts
W WOLVERINE TRADING, LLC Institution	$285.4K 103.0 contracts
BANK OF AMERICA CORP /DE/ Institution	- - contracts
Walleye Trading Advisors, LLC Hedge Fund•Multi-Strategy	- - contracts

Put Positions

Institution	Position Value
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$864.0K 309.0 contracts
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$603.9K 216.0 contracts
W WOLVERINE TRADING, LLC Institution	$357.5K 129.0 contracts
J JANE STREET GROUP, LLC Institution	$296.4K 106.0 contracts
Walleye Trading Advisors, LLC Hedge Fund•Multi-Strategy	- - contracts

Most Committed Institutions

Institutions with AOSL as the highest % of their portfolio as of Q3 2025

Institution	Key People	Portfolio Weight	Ownership	Owned Since	Total AUM (Long)
A Acuitas Investments, LLC Fund of Funds	Lisa Marie Thenell COO	4.32% $6.7M	0.80% 240.9K shares	Q2 2023 Held for 2y 5m	$155.8M
G Gagnon Advisors, LLC Hedge Fund•Long/Short	Neil Joseph Gagnon CEO	2.08% $3.4M	0.40% 120.2K shares	Q4 2013 Held for 11y 11m	$162.0M
GAGNON SECURITIES LLC RIA/Wealth	Neil Joseph Gagnon CEO	1.22% $6.0M	0.72% 215.3K shares	≤ Q2 2013 Held for 12y 5m+	$493.8M
M Mork Capital Management Institution	-	0.87% $1.3M	0.15% 45.0K shares	Q4 2014 Held for 10y 11m	$145.1M
R ROBECOSAM AG Institution	-	0.49% $22.0M	2.61% 785.3K shares	Q1 2025 Held for 8 months	$4.4B
Uniplan Investment Counsel, Inc. RIA/Wealth	Kris Hunter Jamison CEO	0.46% $4.5M	0.53% 160.5K shares	Q3 2018 Held for 7y 2m	$983.7M
Redwood Wealth Management Group, LLC RIA/Wealth	Samuel Clay Bridgers Managing Partner	0.40% $552.0K	0.07% 19.7K shares	Q2 2024 Held for 1y 5m	$139.1M
Numerai GP LLC Hedge Fund•Quant	Richard Malone Craib CEO	0.35% $2.5M	0.30% 89.7K shares	Q2 2025 Held for 5 months	$707.9M
OBERWEIS ASSET MANAGEMENT INC/ Long Only Manager	James Walter Oberweis President	0.29% $7.6M	0.90% 271.1K shares	Q2 2024 Held for 1y 5m	$2.6B
P PEREGRINE CAPITAL MANAGEMENT LLC Long Only Manager	Stephen Gerard Simon CCO	0.19% $6.2M	0.74% 222.1K shares	Q4 2021 Held for 3y 11m	$3.3B

Hedge Fund Spotlight

Discover hedge funds investing in AOSL

PDT Partners, LLC

Hedge Fund • Quant

Portfolio ManagerPeter (Nmn) Muller

Portfolio Value: $1.6B
Positions: 569
Last Reported: Q3 2025

Sector Allocation

Position in Alpha and Omega Semiconductor

Market Value: $595.2K
Shares Held: 21.3K
Portfolio Weight: 0.04%
Owned Since: 2025-Q2

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3 Suncor Energy SU	Oil & Gas Integrated Energy	$14.7M	0.93%