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 | |
|---|---|---|---|---|---|---|
1301
CALL
FirstEnergy
FE
$28.6B
| $5.04M | ﹤0.01% |
125,700
+91,300
| +265% | +$3.69M |
|
1302
CALL
BJs Wholesale Club
BJ
$11.7B
| $5.03M | ﹤0.01% |
66,100
+9,300
| +16% | +$676K |
|
1303
CALL
Arbor Realty Trust
ABR
$966M
| $5.03M | ﹤0.01% |
437,400
+6,500
| +2% | +$90.2K |
|
1304
PUT
Concentrix
CNXC
$1.34B
| $5.02M | ﹤0.01% |
41,300
+14,200
| +52% | +$1.93M |
|
1305
CALL
GlobalFoundries
GFS
$31.2B
| $5.02M | ﹤0.01% |
69,500
-51,600
| -43% | -$3.26M |
|
1306
PUT
American Century Diversified Corporate Bond ETF
KORP
$860M
| $5.01M | ﹤0.01% |
67,900
+67,800
| +67,800% | +$3.11M |
|
1307
CALL
Organon & Co
OGN
$3.56B
| $5M | ﹤0.01% |
212,700
-71,800
| -25% | -$1.93M |
|
1308
PUT
AllianceBernstein
AB
$3.47B
| $5M | ﹤0.01% |
136,700
+111,200
| +436% | +$4.19M |
|
1309
PUT
Aptiv
APTV
$11.9B
| $4.99M | ﹤0.01% |
44,500
-15,000
| -25% | -$1.66M |
|
1310
PUT
Silicon Motion
SIMO
$9.8B
| $4.99M | ﹤0.01% |
76,200
-26,200
| -26% | -$1.72M |
|
|
HTGCR
1311
PUT
DELISTED
HERCULES TECHNOLOGY GROWTH CAP INC TRANS RGTS TO PUR COM STK
HTGCR
| $4.99M | ﹤0.01% |
387,300
+366,800
| +1,789% | +$4.73M |
|
1312
United States Natural Gas Fund
UNG
$473M
| $4.99M | ﹤0.01% |
179,673
+141,272
| +368% | +$5.13M |
|
1313
CALL
Applovin
APP
$134B
| $4.97M | ﹤0.01% |
315,600
+218,000
| +223% | +$2.86M |
|
1314
CALL
Elastic
ESTC
$5.96B
| $4.96M | ﹤0.01% |
85,600
+22,700
| +36% | +$1.29M |
|
1315
PUT
Madrigal Pharmaceuticals
MDGL
$12.5B
| $4.94M | ﹤0.01% |
20,400
-22,500
| -52% | -$6.13M |
|
|
SPR
1316
CALL
DELISTED
Spirit AeroSystems
SPR
| $4.92M | ﹤0.01% |
142,400
+65,700
| +86% | +$2.2M |
|
1317
PUT
Invesco CurrencyShares Canadian Dollar Trust
FXC
$69.3M
| $4.89M | ﹤0.01% |
67,500
+19,300
| +40% | +$1.4M |
|
1318
CALL
Zions Bancorporation
ZION
$10.1B
| $4.88M | ﹤0.01% |
163,000
+120,500
| +284% | +$5.51M |
|
|
CTLT
1319
PUT
DELISTED
CATALENT, INC.
CTLT
| $4.87M | ﹤0.01% |
74,100
+73,500
| +12,250% | +$4.54M |
|
1320
CALL
Elanco Animal Health
ELAN
$12.4B
| $4.87M | ﹤0.01% |
517,900
-188,500
| -27% | -$2.22M |
|
1321
ProShares Bitcoin Strategy ETF
BITO
$1.42B
| $4.87M | ﹤0.01% |
277,714
+277,684
| +925,613% | +$3.99M |
|
1322
CALL
Incyte
INCY
$23.3B
| $4.86M | ﹤0.01% |
67,200
+33,700
| +101% | +$2.64M |
|
|
SVC
1323
CALL
Service Properties Trust
SVC
$1.1B
| $4.85M | ﹤0.01% |
97,380
+60,940
| +167% | +$2.82M |
|
1324
CALL
Vail Resorts
MTN
$5.13B
| $4.84M | ﹤0.01% |
20,700
+16,700
| +418% | +$4.02M |
|
1325
CALL
Global Payments
GPN
$21.3B
| $4.82M | ﹤0.01% |
45,800
-89,500
| -66% | -$9.7M |
|
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.