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 | |
|---|---|---|---|---|---|---|
|
PETQ
4526
PUT
DELISTED
PetIQ, Inc. Class A Common Stock
PETQ
| $168K | ﹤0.01% |
14,700
+9,600
| +188% | +$107K |
|
|
MGI
4527
CALL
DELISTED
MoneyGram International, Inc. New
MGI
| $168K | ﹤0.01% |
16,200
-9,500
| -37% | -$102K |
|
4528
Ashland
ASH
$3.34B
| $167K | ﹤0.01% |
1,628
+1,500
| +1,172% | +$156K |
|
4529
Anterix
ATEX
$1.72B
| $167K | ﹤0.01% |
5,068
+3,362
| +197% | +$110K |
|
4530
Geron
GERN
$898M
| $167K | ﹤0.01% |
+77,387
| New | +$220K |
|
4531
CALL
Rayonier Advanced Materials
RYAM
$562M
| $167K | ﹤0.01% |
26,700
+11,900
| +80% | +$83K |
|
4532
CALL
Westlake Chemical Partners
WLKP
$772M
| $167K | ﹤0.01% |
7,600
+4,600
| +153% | +$108K |
|
4533
CALL
ASE Group
ASX
$68.3B
| $166K | ﹤0.01% |
20,900
+18,000
| +621% | +$132K |
|
4534
PUT
CleanSpark
CLSK
$3.08B
| $166K | ﹤0.01% |
59,900
+46,400
| +344% | +$127K |
|
4535
Vaalco Energy
EGY
$562M
| $166K | ﹤0.01% |
+36,820
| New | +$168K |
|
4536
KLX Energy Services
KLXE
$43.1M
| $166K | ﹤0.01% |
14,311
+10,664
| +292% | +$145K |
|
4537
Opko Health
OPK
$1.02B
| $166K | ﹤0.01% |
+113,893
| New | +$147K |
|
|
SJT
4538
PUT
San Juan Basin Royalty Trust
SJT
$119M
| $166K | ﹤0.01% |
15,800
-8,000
| -34% | -$83.1K |
|
4539
PUT
UWM Holdings
UWMC
$672M
| $166K | ﹤0.01% |
34,000
+9,700
| +40% | +$42.5K |
|
4540
Valley National Bancorp
VLY
$7.9B
| $166K | ﹤0.01% |
+18,065
| New | +$200K |
|
|
WCN
4541
PUT
Waste Connections
WCN
$43.6B
| $166K | ﹤0.01% |
1,200
-2,600
| -68% | -$346K |
|
|
CDMO
4542
PUT
DELISTED
Avid Bioservices, Inc. Common Stock
CDMO
| $166K | ﹤0.01% |
8,900
+8,200
| +1,171% | +$135K |
|
|
VGR
4543
PUT
DELISTED
Vector Group Ltd.
VGR
| $166K | ﹤0.01% |
13,900
-100
| -0.7% | -$1.26K |
|
4544
Autohome
ATHM
$2.62B
| $165K | ﹤0.01% |
4,956
-7,072
| -59% | -$238K |
|
4545
PUT
Clean Energy Fuels
CLNE
$416M
| $165K | ﹤0.01% |
37,900
-11,500
| -23% | -$59.4K |
|
4546
PUT
Huntington Ingalls Industries
HII
$11B
| $165K | ﹤0.01% |
800
+700
| +700% | +$151K |
|
4547
Tilray
TLRY
$493M
| $165K | ﹤0.01% |
6,539
+6,439
| +6,439% | +$184K |
|
|
NARI
4548
DELISTED
Inari Medical, Inc. Common Stock
NARI
| $165K | ﹤0.01% |
2,681
+2,261
| +538% | +$136K |
|
|
ARR
4549
CALL
Armour Residential REIT
ARR
$2.32B
| $164K | ﹤0.01% |
6,280
-9,540
| -60% | -$270K |
|
4550
CALL
Brunswick
BC
$5.23B
| $164K | ﹤0.01% |
2,000
+100
| +5% | +$8.27K |
|
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.