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 | |
|---|---|---|---|---|---|---|
7001
CALL
CAE Inc. Common Shares
CAE
$8.44B
| $22K | ﹤0.01% |
1,100
+1,000
| +1,000% | +$20.1K |
|
7002
Columbia Financial
CLBK
$1.14B
| $22K | ﹤0.01% |
+1,305
| New | +$22.8K |
|
7003
CALL
Century Casinos
CNTY
$32.9M
| $22K | ﹤0.01% |
+7,000
| New | +$23.6K |
|
|
CVAC
7004
CALL
DELISTED
CureVac
CVAC
| $22K | ﹤0.01% |
7,400
-64,100
| -90% | -$225K |
|
7005
PUT
Dave Inc
DAVE
$4.82B
| $22K | ﹤0.01% |
+600
| New | +$13.8K |
|
7006
Douglas Elliman
DOUG
$156M
| $22K | ﹤0.01% |
14,133
+7,085
| +101% | +$14.5K |
|
7007
WisdomTree US SmallCap Earnings Fund
EES
$720M
| $22K | ﹤0.01% |
+453
| New | +$21.8K |
|
7008
PUT
Evolus
EOLS
$397M
| $22K | ﹤0.01% |
1,600
-11,300
| -88% | -$147K |
|
|
EU
7009
PUT
enCore Energy
EU
$206M
| $22K | ﹤0.01% |
5,200
+4,200
| +420% | +$17.8K |
|
7010
CALL
Fidelity Corporate Bond ETF
FCOR
$353M
| $22K | ﹤0.01% |
+500
| New | +$23.2K |
|
7011
PUT
FormFactor
FORM
$6.51B
| $22K | ﹤0.01% |
+500
| New | +$20.8K |
|
7012
Jakks Pacific
JAKK
$303M
| $22K | ﹤0.01% |
893
+102
| +13% | +$3.09K |
|
7013
Lindblad Expeditions
LIND
$1.95B
| $22K | ﹤0.01% |
2,376
-1,514
| -39% | -$13.9K |
|
7014
CALL
908 Devices
MASS
$312M
| $22K | ﹤0.01% |
3,000
-2,800
| -48% | -$20.8K |
|
|
NFGC
7015
PUT
New Found Gold
NFGC
$526M
| $22K | ﹤0.01% |
6,000
-9,200
| -61% | -$30.6K |
|
|
NOA
7016
CALL
North American Construction
NOA
$357M
| $22K | ﹤0.01% |
1,000
+900
| +900% | +$21K |
|
7017
CALL
Nerdy
NRDY
$108M
| $22K | ﹤0.01% |
7,800
+300
| +4% | +$925 |
|
7018
CALL
Oxford Industries
OXM
$581M
| $22K | ﹤0.01% |
200
-37,700
| -99% | -$3.79M |
|
7019
PUT
PetMed Express
PETS
$42.3M
| $22K | ﹤0.01% |
4,800
-51,700
| -92% | -$301K |
|
7020
The RMR Group
RMR
$335M
| $22K | ﹤0.01% |
954
+751
| +370% | +$18.8K |
|
|
SJT
7021
PUT
San Juan Basin Royalty Trust
SJT
$119M
| $22K | ﹤0.01% |
4,200
-4,900
| -54% | -$25.5K |
|
7022
PUT
Tucows
TCX
$104M
| $22K | ﹤0.01% |
+1,200
| New | +$25.1K |
|
7023
WisdomTree Floating Rate Treasury Fund
USFR
$18.1B
| $22K | ﹤0.01% |
453
-200
| -31% | -$10.1K |
|
7024
ProShares Ultra 7-10 Year Treasury
UST
$15.9M
| $22K | ﹤0.01% |
522
+438
| +521% | +$19.2K |
|
7025
PUT
Beyond Air
XAIR
$3.97M
| $22K | ﹤0.01% |
33
-10
| -23% | -$6.87K |
|
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.