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 | |
|---|---|---|---|---|---|---|
|
CCEC
3901
Capital Clean Energy Carriers
CCEC
$1.36B
| $285K | ﹤0.01% |
21,288
-14,013
| -40% | -$193K |
|
3902
Emergent Biosolutions
EBS
$377M
| $284K | ﹤0.01% |
27,468
+27,301
| +16,348% | +$330K |
|
|
HIMX
3903
CALL
Himax Technologies
HIMX
$2.09B
| $284K | ﹤0.01% |
35,000
-855,100
| -96% | -$6.6M |
|
3904
KB Financial Group
KB
$40.6B
| $284K | ﹤0.01% |
+7,807
| New | +$322K |
|
3905
Blackstone
BX
$107B
| $283K | ﹤0.01% |
3,229
-32,195
| -91% | -$2.84M |
|
|
LADR
3906
CALL
Ladder Capital
LADR
$1.26B
| $283K | ﹤0.01% |
30,000
-11,800
| -28% | -$125K |
|
3907
PUT
Tyler Technologies
TYL
$13.7B
| $283K | ﹤0.01% |
800
+100
| +14% | +$32.5K |
|
|
EGLE
3908
DELISTED
Eagle Bulk Shipping Inc.
EGLE
| $283K | ﹤0.01% |
+6,224
| New | +$333K |
|
3909
Glaukos
GKOS
$8.89B
| $282K | ﹤0.01% |
+5,638
| New | +$274K |
|
3910
PUT
Textron
TXT
$15.6B
| $282K | ﹤0.01% |
4,000
-27,300
| -87% | -$1.95M |
|
3911
PUT
Western Union
WU
$2.58B
| $282K | ﹤0.01% |
25,300
+2,100
| +9% | +$27.3K |
|
|
RUTH
3912
CALL
DELISTED
Ruth's Hospitality Group, Inc.
RUTH
| $282K | ﹤0.01% |
17,200
-28,400
| -62% | -$493K |
|
3913
CALL
The GEO Group
GEO
$4.11B
| $281K | ﹤0.01% |
35,700
-237,500
| -87% | -$2.33M |
|
3914
PUT
PharmaCyte Biotech
PMCB
$6.33M
| $281K | ﹤0.01% |
96,800
+45,300
| +88% | +$133K |
|
3915
CALL
Vanguard Total International Stock ETF
VXUS
$153B
| $281K | ﹤0.01% |
5,100
+2,600
| +104% | +$142K |
|
|
BCYC
3916
PUT
Bicycle Therapeutics
BCYC
$275M
| $280K | ﹤0.01% |
13,200
-700
| -5% | -$17.6K |
|
3917
CALL
LoveSac
LOVE
$248M
| $280K | ﹤0.01% |
9,700
+5,800
| +149% | +$153K |
|
3918
PUT
MannKind Corp
MNKD
$1.21B
| $280K | ﹤0.01% |
68,300
-24,900
| -27% | -$120K |
|
3919
CALL
PROG Holdings
PRG
$1.81B
| $280K | ﹤0.01% |
11,800
+10,600
| +883% | +$238K |
|
3920
CALL
Varonis Systems
VRNS
$5.13B
| $280K | ﹤0.01% |
10,800
+8,600
| +391% | +$224K |
|
3921
Amprius Technologies
AMPX
$1.29B
| $279K | ﹤0.01% |
+32,071
| New | +$203K |
|
|
MOMO
3922
PUT
Hello Group
MOMO
$869M
| $279K | ﹤0.01% |
30,700
-18,400
| -37% | -$176K |
|
3923
PUT
New York Times
NYT
$12.2B
| $279K | ﹤0.01% |
7,200
+3,600
| +100% | +$133K |
|
3924
CALL
Skywest
SKYW
$4.51B
| $279K | ﹤0.01% |
12,600
+11,200
| +800% | +$219K |
|
|
BCTXW
3925
CALL
DELISTED
BriaCell Therapeutics Corp Warrant
BCTXW
| $278K | ﹤0.01% |
37,400
-40,800
| -52% | -$117K |
|
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.