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 | Miscellaneous | 98.51% |
| 2 | Technology | 0.42% |
| 3 | Consumer Discretionary | 0.2% |
| 4 | Healthcare | 0.17% |
| 5 | Industrials | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
PXD
826
CALL
DELISTED
Pioneer Natural Resource Co.
PXD
| $11.5M | 0.01% |
56,100
-13,400
| -19% | -$2.88M |
|
827
PUT
Lucid Motors
LCID
$1.84B
| $11.5M | 0.01% |
142,490
+29,490
| +26% | +$2.62M |
|
|
IPFF
828
CALL
DELISTED
iShares International Preferred Stock ETF
IPFF
| $11.4M | 0.01% |
200,500
-239,600
| -54% | -$13.7M |
|
829
PUT
Harley-Davidson
HOG
$2.95B
| $11.4M | 0.01% |
299,600
+67,800
| +29% | +$2.98M |
|
830
PUT
Star Bulk Carriers
SBLK
$3.62B
| $11.4M | 0.01% |
538,200
-166,400
| -24% | -$3.64M |
|
831
PUT
Beyond Meat
BYND
$203M
| $11.3M | 0.01% |
23,267
-11,416
| -33% | -$5.64M |
|
832
CALL
Knight Transportation
KNX
$11.7B
| $11.3M | 0.01% |
199,500
+176,800
| +779% | +$10.1M |
|
833
MongoDB
MDB
$29.7B
| $11.3M | 0.01% |
48,318
+45,528
| +1,632% | +$9.55M |
|
834
CALL
APA Corp
APA
$15B
| $11.2M | 0.01% |
311,100
-135,800
| -30% | -$5.45M |
|
835
PUT
Papa John's
PZZA
$747M
| $11.2M | 0.01% |
149,400
+128,500
| +615% | +$10.9M |
|
836
CALL
Intercontinental Exchange
ICE
$90.5B
| $11.2M | 0.01% |
107,300
+59,400
| +124% | +$6.19M |
|
837
CALL
Carvana
CVNA
$53.7B
| $11.2M | 0.01% |
5,714,000
-1,420,500
| -20% | -$2.46M |
|
838
CALL
Plug Power
PLUG
$3.03B
| $11.2M | 0.01% |
953,400
-1,197,700
| -56% | -$17.1M |
|
839
CALL
PTC
PTC
$15.3B
| $11.2M | 0.01% |
87,100
+20,900
| +32% | +$2.66M |
|
840
CALL
Norfolk Southern
NSC
$74B
| $11.2M | 0.01% |
52,600
+9,200
| +21% | +$2.13M |
|
|
ATVI
841
DELISTED
Activision Blizzard
ATVI
| $11.1M | 0.01% |
130,151
+99,638
| +327% | +$7.74M |
|
842
CALL
Markel Group
MKL
$22.6B
| $11.1M | 0.01% |
8,700
-2,800
| -24% | -$3.72M |
|
843
PUT
Nice
NICE
$6.18B
| $11.1M | 0.01% |
48,500
+32,000
| +194% | +$6.72M |
|
844
CALL
Scotiabank
BNS
$114B
| $11M | 0.01% |
219,400
-142,800
| -39% | -$7.33M |
|
845
PUT
Weibo
WB
$1.65B
| $11M | 0.01% |
549,200
+531,800
| +3,056% | +$10.9M |
|
846
CALL
Southwest Airlines
LUV
$19.4B
| $11M | 0.01% |
338,300
-45,900
| -12% | -$1.56M |
|
847
PUT
Asana
ASAN
$2.02B
| $11M | 0.01% |
519,600
+199,900
| +63% | +$3.31M |
|
848
PUT
American Electric Power
AEP
$67.8B
| $11M | 0.01% |
120,500
+76,300
| +173% | +$6.98M |
|
849
PUT
STMicroelectronics
STM
$46.6B
| $11M | 0.01% |
204,900
+74,700
| +57% | +$3.48M |
|
850
CALL
Affirm
AFRM
$24.4B
| $10.9M | 0.01% |
966,400
-226,700
| -19% | -$2.86M |
|
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's Q1 2023 filing shows 1,536 new, 3,663 increased, 3,631 reduced and 1,728 closed positions. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M. The largest sale was Amazon, an estimated $189M.
By sector, the portfolio is most concentrated in Miscellaneous at 99% of assets, up from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- 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 1,728 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.