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 | |
|---|---|---|---|---|---|---|
2951
Vertiv
VRT
$112B
| $685K | ﹤0.01% |
+47,877
| New | +$703K |
|
2952
CALL
Aecom
ACM
$9.07B
| $682K | ﹤0.01% |
8,100
-7,200
| -47% | -$621K |
|
|
ANSS
2953
DELISTED
Ansys
ANSS
| $682K | ﹤0.01% |
+2,051
| New | +$579K |
|
2954
CALL
ProShares UltraShort Industrials
SIJ
$5.74M
| $682K | ﹤0.01% |
11,875
-4,800
| -29% | -$281K |
|
2955
PUT
JetBlue
JBLU
$1.96B
| $681K | ﹤0.01% |
93,600
-93,200
| -50% | -$736K |
|
2956
CALL
Phillips Edison & Co
PECO
$5.48B
| $681K | ﹤0.01% |
20,900
+6,500
| +45% | +$213K |
|
2957
VeriSign
VRSN
$25.3B
| $681K | ﹤0.01% |
3,224
+3,038
| +1,633% | +$626K |
|
2958
PUT
TC Energy
TRP
$73.5B
| $680K | ﹤0.01% |
17,500
-37,300
| -68% | -$1.52M |
|
2959
CALL
Axcelis
ACLS
$4.12B
| $679K | ﹤0.01% |
5,100
-100
| -2% | -$11.7K |
|
2960
Aegon
AEG
$13.5B
| $679K | ﹤0.01% |
158,021
+30,230
| +24% | +$153K |
|
2961
Boeing
BA
$165B
| $679K | ﹤0.01% |
3,200
-282
| -8% | -$58.6K |
|
|
OSH
2962
DELISTED
Oak Street Health, Inc.
OSH
| $679K | ﹤0.01% |
+17,562
| New | +$567K |
|
2963
PUT
MBIA
MBI
$288M
| $678K | ﹤0.01% |
73,300
+66,000
| +904% | +$788K |
|
2964
CALL
ACM Research
ACMR
$5.83B
| $677K | ﹤0.01% |
57,900
+51,800
| +849% | +$599K |
|
2965
Lithia Motors
LAD
$7.78B
| $677K | ﹤0.01% |
2,961
+667
| +29% | +$162K |
|
2966
CALL
Magnite
MGNI
$2.65B
| $676K | ﹤0.01% |
73,100
-96,000
| -57% | -$1.02M |
|
2967
Beam Therapeutics
BEAM
$2.58B
| $674K | ﹤0.01% |
22,018
+15,991
| +265% | +$631K |
|
2968
PUT
W.P. Carey
WPC
$17.1B
| $673K | ﹤0.01% |
8,883
-4,901
| -36% | -$391K |
|
2969
Zscaler
ZS
$23B
| $673K | ﹤0.01% |
+5,767
| New | +$692K |
|
|
2970
ACM Research
ACMR
$5.83B
| $672K | ﹤0.01% |
57,465
+50,003
| +670% | +$578K |
|
2971
Bath & Body Works
BBWI
$4.01B
| $672K | ﹤0.01% |
18,393
+13,647
| +288% | +$572K |
|
2972
PUT
Cooper Companies
COO
$13.7B
| $672K | ﹤0.01% |
7,200
+3,200
| +80% | +$275K |
|
2973
CALL
Lands' End
LE
$361M
| $672K | ﹤0.01% |
69,200
+44,100
| +176% | +$369K |
|
2974
CALL
Arch Capital
ACGL
$36.1B
| $671K | ﹤0.01% |
9,900
+500
| +5% | +$32.9K |
|
2975
PUT
DigitalBridge
DBRG
$2.94B
| $671K | ﹤0.01% |
56,000
-90,900
| -62% | -$1.14M |
|
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.