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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
SFIX
7426
Stitch Fix
SFIX
$563M
| $13K | ﹤0.01% |
5,136
-38,971
| -88% | -$120K |
|
7427
CALL
SelectQuote
SLQT
$132M
| $13K | ﹤0.01% |
6,500
+800
| +14% | +$1.2K |
|
|
SOND
7428
PUT
DELISTED
Sonder
SOND
| $13K | ﹤0.01% |
4,600
-183,300
| -98% | -$646K |
|
7429
CALL
SunCoke Energy
SXC
$779M
| $13K | ﹤0.01% |
1,200
-3,100
| -72% | -$33.5K |
|
|
7430
PUT
SunCoke Energy
SXC
$779M
| $13K | ﹤0.01% |
1,200
+100
| +9% | +$1.08K |
|
7431
CALL
Sensient Technologies
SXT
$5.3B
| $13K | ﹤0.01% |
200
-45,300
| -100% | -$2.94M |
|
7432
PUT
Takeda Pharmaceutical
TAK
$56B
| $13K | ﹤0.01% |
1,000
| – | – |
|
7433
CALL
TriNet
TNET
$3.14B
| $13K | ﹤0.01% |
100
-400
| -80% | -$48.5K |
|
|
7434
TriNet
TNET
$3.14B
| $13K | ﹤0.01% |
+103
| New | +$12.5K |
|
|
TUYA
7435
PUT
Tuya Inc
TUYA
$1.02B
| $13K | ﹤0.01% |
7,500
-400
| -5% | -$760 |
|
7436
UNIFI
UFI
$121M
| $13K | ﹤0.01% |
2,336
-768
| -25% | -$4.65K |
|
7437
PUT
Vital Farms
VITL
$592M
| $13K | ﹤0.01% |
600
-13,500
| -96% | -$235K |
|
|
VNET
7438
PUT
VNET Group
VNET
$1.92B
| $13K | ﹤0.01% |
8,900
-324,300
| -97% | -$598K |
|
7439
Verrica Pharmaceuticals
VRCA
$92.8M
| $13K | ﹤0.01% |
229
-223
| -49% | -$12.3K |
|
7440
CALL
WhiteHorse Finance
WHF
$139M
| $13K | ﹤0.01% |
+1,100
| New | +$13.9K |
|
7441
CALL
Westwood Holdings Group
WHG
$187M
| $13K | ﹤0.01% |
1,100
+300
| +38% | +$3.61K |
|
7442
Willdan Group
WLDN
$1.06B
| $13K | ﹤0.01% |
+455
| New | +$9.9K |
|
|
BMTX
7443
CALL
DELISTED
BM Technologies, Inc.
BMTX
| $13K | ﹤0.01% |
8,200
+7,500
| +1,071% | +$14.4K |
|
|
ITI
7444
PUT
DELISTED
Iteris, Inc.
ITI
| $13K | ﹤0.01% |
+2,800
| New | +$13.8K |
|
|
GMDA
7445
CALL
DELISTED
Gamida Cell Ltd. Ordinary Shares
GMDA
| $13K | ﹤0.01% |
513,300
+241,900
| +89% | +$82.7K |
|
|
EGLE
7446
CALL
DELISTED
Eagle Bulk Shipping Inc.
EGLE
| $13K | ﹤0.01% |
1,400
+100
| +8% | +$5.84K |
|
7447
Direxion Daily AAPL Bull 2X ETF
AAPU
$197M
| $12K | ﹤0.01% |
551
+245
| +80% | +$6.1K |
|
7448
A.O. Smith
AOS
$8.82B
| $12K | ﹤0.01% |
140
-3,333
| -96% | -$275K |
|
|
ASA
7449
CALL
ASA Gold and Precious Metals
ASA
$941M
| $12K | ﹤0.01% |
800
+600
| +300% | +$8.74K |
|
7450
CALL
Amtech Systems
ASYS
$257M
| $12K | ﹤0.01% |
+2,400
| New | +$10.8K |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.