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 | |
|---|---|---|---|---|---|---|
1001
PUT
S&P Global
SPGI
$124B
| $8.17M | 0.01% |
23,700
-78,000
| -77% | -$27.5M |
|
1002
Western Alliance Bancorporation
WAL
$9.06B
| $8.15M | 0.01% |
+229,321
| New | +$14.1M |
|
1003
CALL
General Mills
GIS
$19B
| $8.13M | 0.01% |
95,200
-158,800
| -63% | -$12.7M |
|
1004
PUT
KeyCorp
KEY
$24.4B
| $8.13M | 0.01% |
649,100
+546,400
| +532% | +$9.23M |
|
1005
PUT
Vistra
VST
$57B
| $8.13M | 0.01% |
338,600
+177,100
| +110% | +$4.11M |
|
1006
PUT
Realty Income
O
$60.4B
| $8.11M | 0.01% |
128,100
-18,900
| -13% | -$1.22M |
|
1007
PUT
NetApp
NTAP
$32.3B
| $8.11M | 0.01% |
127,000
+36,600
| +40% | +$2.36M |
|
1008
CALL
Cognizant
CTSH
$20.3B
| $8.05M | 0.01% |
132,100
-69,000
| -34% | -$4.32M |
|
1009
PUT
Deutsche Bank
DB
$65.3B
| $8.01M | 0.01% |
784,100
+93,000
| +13% | +$1.11M |
|
1010
PUT
Coherent
COHR
$61.3B
| $8M | 0.01% |
210,200
+120,200
| +134% | +$4.89M |
|
1011
CALL
RingCentral
RNG
$3.24B
| $8M | 0.01% |
260,900
-62,600
| -19% | -$2.24M |
|
1012
CALL
ArcelorMittal
MT
$49.9B
| $8M | 0.01% |
265,500
-12,100
| -4% | -$360K |
|
1013
CALL
Liberty Media Series A
FWONA
$22.2B
| $7.99M | 0.01% |
297,778
+207,536
| +230% | +$12.5M |
|
1014
CF Industries
CF
$19.5B
| $7.96M | 0.01% |
109,766
+55,446
| +102% | +$4.53M |
|
1015
CALL
Tenet Healthcare
THC
$17.1B
| $7.96M | 0.01% |
133,900
+20,100
| +18% | +$1.12M |
|
1016
PUT
Cenovus Energy
CVE
$55.4B
| $7.95M | 0.01% |
455,600
-154,500
| -25% | -$2.84M |
|
1017
PUT
Chubb
CB
$137B
| $7.94M | 0.01% |
40,900
-10,400
| -20% | -$2.19M |
|
1018
CALL
Fair Isaac
FICO
$28B
| $7.94M | 0.01% |
11,300
-4,800
| -30% | -$3.19M |
|
1019
PUT
LyondellBasell Industries
LYB
$19.9B
| $7.92M | 0.01% |
84,400
+46,900
| +125% | +$4.36M |
|
|
MDC
1020
PUT
DELISTED
M.D.C. Holdings, Inc.
MDC
| $7.92M | 0.01% |
203,700
+102,200
| +101% | +$3.78M |
|
1021
PUT
Chord Energy
CHRD
$7.82B
| $7.87M | 0.01% |
58,500
+57,400
| +5,218% | +$7.79M |
|
1022
PUT
Energy Transfer Partners
ET
$70.3B
| $7.87M | 0.01% |
630,800
-362,200
| -36% | -$4.58M |
|
1023
CALL
Hewlett Packard
HPE
$63.1B
| $7.83M | 0.01% |
491,900
+394,700
| +406% | +$6.2M |
|
1024
PUT
T. Rowe Price
TROW
$24.6B
| $7.83M | 0.01% |
69,400
+17,600
| +34% | +$2.01M |
|
1025
CALL
Check Point Software Technologies
CHKP
$13.1B
| $7.83M | 0.01% |
60,200
+34,300
| +132% | +$4.36M |
|
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.