Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Walmart Inc
WMT
|
+$43.6M |
| 2 |
Apple
AAPL
|
+$40.9M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$37.7M |
| 4 |
Citigroup
C
|
+$34.2M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$32.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$189M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 3 |
NVIDIA
NVDA
|
+$115M |
| 4 |
Tesla
TSLA
|
+$52M |
| 5 |
Meta Platforms (Facebook)
META
|
+$49M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.42% |
| 2 | Consumer Discretionary | 0.2% |
| 3 | Healthcare | 0.17% |
| 4 | Industrials | 0.15% |
| 5 | Communication Services | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3076
CALL
Boise Cascade
BCC
$2.76B
| $607K | ﹤0.01% |
9,600
+8,500
| +773% | +$590K |
|
3077
Coeur Mining
CDE
$15.7B
| $607K | ﹤0.01% |
152,245
+1,895
| +1% | +$6.58K |
|
3078
CALL
Liberty Latin America Class C
LILAK
$1.54B
| $606K | ﹤0.01% |
80,630
+66,770
| +482% | +$532K |
|
|
BCLI
3079
DELISTED
BRAINSTORM CELL THERAPUTC
BCLI
| $605K | ﹤0.01% |
12,226
+11,489
| +1,559% | +$333K |
|
3080
Grab
GRAB
$13.8B
| $605K | ﹤0.01% |
+201,007
| New | +$668K |
|
3081
Par Pacific Holdings
PARR
$3.84B
| $605K | ﹤0.01% |
+20,751
| New | +$554K |
|
3082
B2Gold
BTG
$5.16B
| $601K | ﹤0.01% |
152,592
+22,723
| +17% | +$84.5K |
|
3083
CALL
Urban Outfitters
URBN
$6.15B
| $601K | ﹤0.01% |
21,700
+6,200
| +40% | +$167K |
|
|
ACLX
3084
CALL
DELISTED
Arcellx
ACLX
| $600K | ﹤0.01% |
19,500
+16,600
| +572% | +$504K |
|
3085
FLEX LNG
FLNG
$1.66B
| $600K | ﹤0.01% |
17,880
-16,250
| -48% | -$529K |
|
|
LDTC
3086
DELISTED
LeddarTech
LDTC
| $600K | ﹤0.01% |
121,010
+121,008
| +6,050,400% | +$605K |
|
|
AY
3087
PUT
DELISTED
Atlantica Sustainable Infrastructure plc Ordinary Shares
AY
| $600K | ﹤0.01% |
20,300
+4,400
| +28% | +$120K |
|
|
GPP
3088
PUT
DELISTED
Green Plains Partners LP
GPP
| $600K | ﹤0.01% |
47,300
+29,800
| +170% | +$386K |
|
3089
PUT
UDR
UDR
$12.8B
| $599K | ﹤0.01% |
14,600
-1,000
| -6% | -$41.3K |
|
|
PBT
3090
Permian Basin Royalty Trust
PBT
$1.33B
| $597K | ﹤0.01% |
24,474
-39,000
| -61% | -$928K |
|
3091
CALL
Arbutus Biopharma
ABUS
$881M
| $596K | ﹤0.01% |
196,900
+125,100
| +174% | +$353K |
|
|
MGI
3092
PUT
DELISTED
MoneyGram International, Inc. New
MGI
| $596K | ﹤0.01% |
57,200
+36,100
| +171% | +$389K |
|
|
TA
3093
CALL
DELISTED
TravelCenters of America LLC
TA
| $596K | ﹤0.01% |
+6,900
| New | +$453K |
|
3094
PUT
Ashland
ASH
$3.06B
| $595K | ﹤0.01% |
5,800
+1,800
| +45% | +$187K |
|
3095
STAAR Surgical
STAA
$1.16B
| $595K | ﹤0.01% |
+9,312
| New | +$608K |
|
3096
Alcon
ALC
$33.2B
| $593K | ﹤0.01% |
+8,419
| New | +$599K |
|
|
BPMC
3097
PUT
DELISTED
Blueprint Medicines
BPMC
| $593K | ﹤0.01% |
13,200
+8,600
| +187% | +$387K |
|
3098
PUT
Trex
TREX
$4.59B
| $593K | ﹤0.01% |
12,200
+5,600
| +85% | +$283K |
|
3099
Generac Holdings
GNRC
$11.6B
| $592K | ﹤0.01% |
5,483
-32,950
| -86% | -$3.81M |
|
3100
PUT
Ginkgo Bioworks
DNA
$491M
| $589K | ﹤0.01% |
11,075
+5,535
| +100% | +$351K |
|
Similar funds
Simplex Trading's Q1 2023 Portfolio in Review
As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading deployed $10.1B of net new capital in Q1 2023, opening 1,536 new positions and adding to 3,665 existing holdings. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M.
By sector, the portfolio is most concentrated in Technology at 0.42% of assets, up from 0.35% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Meta Platforms (Facebook), an estimated $49M trimmed.
- Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
- Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
- Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
- Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
- Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
- Simplex Trading opened 1,536 new positions and closed 1,729 in Q1 2023.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.
Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.