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 | |
|---|---|---|---|---|---|---|
2326
Macy's
M
$6.15B
| $1.33M | ﹤0.01% |
75,943
-189,284
| -71% | -$4.01M |
|
2327
PUT
Sweetgreen
SG
$713M
| $1.32M | ﹤0.01% |
168,600
+97,900
| +138% | +$862K |
|
2328
CALL
FTAI Aviation
FTAI
$22.2B
| $1.32M | ﹤0.01% |
56,900
+7,100
| +14% | +$168K |
|
2329
Zimmer Biomet
ZBH
$17.7B
| $1.32M | ﹤0.01% |
+10,211
| New | +$1.28M |
|
2330
CALL
Alexandria Real Estate Equities
ARE
$8.88B
| $1.32M | ﹤0.01% |
10,500
-15,300
| -59% | -$2.25M |
|
2331
CALL
EPR Properties
EPR
$4.86B
| $1.32M | ﹤0.01% |
34,600
+11,500
| +50% | +$458K |
|
|
IMGN
2332
CALL
DELISTED
Immunogen Inc
IMGN
| $1.32M | ﹤0.01% |
343,400
+285,700
| +495% | +$1.22M |
|
2333
Encompass Health
EHC
$11.2B
| $1.32M | ﹤0.01% |
+24,328
| New | +$1.42M |
|
|
NNDM
2334
CALL
Nano Dimension
NNDM
$309M
| $1.31M | ﹤0.01% |
454,900
-254,500
| -36% | -$684K |
|
2335
PUT
Wabtec
WAB
$51.1B
| $1.31M | ﹤0.01% |
13,000
+3,700
| +40% | +$378K |
|
2336
Signet Jewelers
SIG
$3.55B
| $1.31M | ﹤0.01% |
16,852
+6,706
| +66% | +$497K |
|
|
XM
2337
DELISTED
Qualtrics International Inc. Class A Common Stock
XM
| $1.31M | ﹤0.01% |
73,438
+19,829
| +37% | +$303K |
|
2338
CALL
Energizer
ENR
$1.44B
| $1.31M | ﹤0.01% |
37,700
+4,500
| +14% | +$159K |
|
2339
PUT
SiriusXM
SIRI
$10B
| $1.31M | ﹤0.01% |
32,960
-6,950
| -17% | -$333K |
|
2340
PUT
Madison Square Garden
MSGS
$9.54B
| $1.3M | ﹤0.01% |
6,700
-5,300
| -44% | -$987K |
|
2341
CALL
Mirion Technologies
MIR
$4.05B
| $1.3M | ﹤0.01% |
152,600
+53,300
| +54% | +$423K |
|
|
CRON
2342
PUT
Cronos Group
CRON
$1.05B
| $1.3M | ﹤0.01% |
671,500
-505,000
| -43% | -$1.13M |
|
2343
CALL
Darling Ingredients
DAR
$9.93B
| $1.3M | ﹤0.01% |
22,300
+5,100
| +30% | +$321K |
|
2344
CALL
Alliant Energy
LNT
$19.4B
| $1.3M | ﹤0.01% |
24,400
+12,900
| +112% | +$686K |
|
2345
CALL
Concentrix
CNXC
$1.36B
| $1.3M | ﹤0.01% |
10,700
+4,300
| +67% | +$584K |
|
2346
CALL
Genco Shipping & Trading
GNK
$1.17B
| $1.3M | ﹤0.01% |
82,900
+69,500
| +519% | +$1.19M |
|
|
UDMY
2347
PUT
DELISTED
Udemy
UDMY
| $1.3M | ﹤0.01% |
147,100
+142,200
| +2,902% | +$1.5M |
|
2348
Cenovus Energy
CVE
$54.6B
| $1.3M | ﹤0.01% |
74,313
-336,733
| -82% | -$6.18M |
|
|
AKTS
2349
CALL
DELISTED
Akoustis Technologies Inc
AKTS
| $1.3M | ﹤0.01% |
421,200
+418,600
| +16,100% | +$1.46M |
|
2350
CALL
Camping World
CWH
$363M
| $1.3M | ﹤0.01% |
62,100
-15,900
| -20% | -$371K |
|
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.