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 | |
|---|---|---|---|---|---|---|
5826
PUT
GoPro
GPRO
$130M
| $79K | ﹤0.01% |
35,500
-1,500
| -4% | -$4K |
|
|
ODP
5827
PUT
DELISTED
ODP
ODP
| $79K | ﹤0.01% |
1,500
-1,800
| -55% | -$94.1K |
|
5828
CALL
Grupo Aeroportuario Centro Norte
OMAB
$5.16B
| $79K | ﹤0.01% |
1,000
-6,900
| -87% | -$504K |
|
5829
CALL
ThredUp
TDUP
$746M
| $79K | ﹤0.01% |
39,700
+200
| +0.5% | +$408 |
|
5830
CALL
Velocity Financial
VEL
$689M
| $79K | ﹤0.01% |
4,400
| – | – |
|
5831
PUT
VTEX
VTEX
$735M
| $79K | ﹤0.01% |
9,700
+2,500
| +35% | +$20K |
|
|
ZUO
5832
DELISTED
Zuora, Inc.
ZUO
| $79K | ﹤0.01% |
+8,755
| New | +$76.3K |
|
|
CDMO
5833
PUT
DELISTED
Avid Bioservices, Inc. Common Stock
CDMO
| $79K | ﹤0.01% |
+11,800
| New | +$81.2K |
|
5834
PUT
AXIS Capital
AXS
$7.68B
| $78K | ﹤0.01% |
1,200
+1,000
| +500% | +$59.9K |
|
5835
Corbus Pharmaceuticals
CRBP
$166M
| $78K | ﹤0.01% |
+1,990
| New | +$49.1K |
|
5836
DHT Holdings
DHT
$2.99B
| $78K | ﹤0.01% |
6,857
-52,083
| -88% | -$571K |
|
5837
Genworth Financial
GNW
$3.76B
| $78K | ﹤0.01% |
12,245
-16,909
| -58% | -$106K |
|
|
GPMT
5838
CALL
Granite Point Mortgage Trust
GPMT
$69M
| $78K | ﹤0.01% |
16,500
+9,400
| +132% | +$48.8K |
|
5839
Immunome
IMNM
$2.58B
| $78K | ﹤0.01% |
3,165
+448
| +16% | +$9.09K |
|
5840
CALL
INmune Bio
INMB
$46.5M
| $78K | ﹤0.01% |
6,700
+4,100
| +158% | +$49.5K |
|
5841
PUT
Madison Square Garden
MSGE
$3.65B
| $78K | ﹤0.01% |
2,000
| – | – |
|
5842
CALL
Newmark Group
NMRK
$2.66B
| $78K | ﹤0.01% |
7,100
+4,900
| +223% | +$51.3K |
|
5843
PUT
abrdn Physical Gold Shares ETF
SGOL
$6.91B
| $78K | ﹤0.01% |
3,700
+1,200
| +48% | +$23.8K |
|
|
SP
5844
PUT
DELISTED
SP Plus Corporation
SP
| $78K | ﹤0.01% |
1,500
-400
| -21% | -$20.6K |
|
5845
Accel Entertainment
ACEL
$978M
| $77K | ﹤0.01% |
6,533
-4,736
| -42% | -$50.5K |
|
5846
CALL
Beam Global
BEEM
$23.3M
| $77K | ﹤0.01% |
11,400
-1,800
| -14% | -$12.3K |
|
5847
PUT
Century Communities
CCS
$1.91B
| $77K | ﹤0.01% |
800
+700
| +700% | +$61.4K |
|
5848
CALL
Daktronics
DAKT
$955M
| $77K | ﹤0.01% |
7,800
-22,800
| -75% | -$190K |
|
|
INZY
5849
PUT
DELISTED
Inozyme Pharma
INZY
| $77K | ﹤0.01% |
10,100
-2,600
| -20% | -$14.3K |
|
5850
CALL
Ispire Technology
ISPR
$83.2M
| $77K | ﹤0.01% |
12,700
-35,200
| -73% | -$354K |
|
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.