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 | |
|---|---|---|---|---|---|---|
4951
CenterPoint Energy
CNP
$27.7B
| $182K | ﹤0.01% |
6,407
-7,553
| -54% | -$212K |
|
4952
CALL
Capital Southwest
CSWC
$1.47B
| $182K | ﹤0.01% |
7,300
-3,100
| -30% | -$75.6K |
|
4953
CALL
IES Holdings
IESC
$14.8B
| $182K | ﹤0.01% |
+1,500
| New | +$144K |
|
|
LAND
4954
PUT
Gladstone Land Corp
LAND
$350M
| $182K | ﹤0.01% |
13,700
-1,900
| -12% | -$25.6K |
|
|
LTC
4955
PUT
LTC Properties
LTC
$2.06B
| $182K | ﹤0.01% |
5,600
+1,100
| +24% | +$35K |
|
4956
Rayonier Advanced Materials
RYAM
$604M
| $182K | ﹤0.01% |
38,171
-41,991
| -52% | -$179K |
|
|
AGEN
4957
CALL
Agenus
AGEN
$312M
| $181K | ﹤0.01% |
15,670
+4,150
| +36% | +$55K |
|
4958
Descartes Systems
DSGX
$6.44B
| $181K | ﹤0.01% |
1,985
+1,887
| +1,926% | +$166K |
|
4959
PUT
Factset
FDS
$9.36B
| $181K | ﹤0.01% |
400
-400
| -50% | -$186K |
|
4960
PUT
Genpact
G
$5.96B
| $181K | ﹤0.01% |
5,500
+5,300
| +2,650% | +$184K |
|
4961
Installed Building Products
IBP
$6.01B
| $181K | ﹤0.01% |
701
+513
| +273% | +$110K |
|
|
MREO
4962
CALL
Mereo BioPharma
MREO
$54.7M
| $181K | ﹤0.01% |
55,100
-15,500
| -22% | -$52.5K |
|
4963
NCR Atleos
NATL
$3.47B
| $181K | ﹤0.01% |
9,176
-16,232
| -64% | -$347K |
|
4964
PUT
Pixelworks
PXLW
$38.2M
| $181K | ﹤0.01% |
+5,850
| New | +$155K |
|
|
SNBR
4965
PUT
DELISTED
Sleep Number
SNBR
| $181K | ﹤0.01% |
11,300
-24,900
| -69% | -$323K |
|
|
CDMO
4966
DELISTED
Avid Bioservices, Inc. Common Stock
CDMO
| $181K | ﹤0.01% |
+27,163
| New | +$187K |
|
|
HA
4967
PUT
DELISTED
Hawaiian Holdings, Inc.
HA
| $181K | ﹤0.01% |
13,600
-218,600
| -94% | -$3.04M |
|
4968
CALL
American Homes 4 Rent
AMH
$12B
| $180K | ﹤0.01% |
4,900
+4,100
| +513% | +$146K |
|
4969
CALL
Sphere 3D
ANY
$18.5M
| $180K | ﹤0.01% |
11,700
-7,480
| -39% | -$152K |
|
|
CCC
4970
CALL
CCC Intelligent Solutions
CCC
$3.59B
| $180K | ﹤0.01% |
15,100
+14,700
| +3,675% | +$168K |
|
4971
CMS Energy
CMS
$22.6B
| $180K | ﹤0.01% |
2,984
-2,202
| -42% | -$128K |
|
|
LKFT
4972
PUT
Lakefront Biotherapeutics American Depositary Shares
LKFT
$1.78B
| $180K | ﹤0.01% |
5,600
-8,800
| -61% | -$327K |
|
4973
CALL
Nektar Therapeutics
NKTR
$2.39B
| $180K | ﹤0.01% |
+12,880
| New | +$135K |
|
|
ONIT
4974
PUT
Onity Group
ONIT
$309M
| $180K | ﹤0.01% |
6,700
-8,700
| -56% | -$241K |
|
|
FNA
4975
PUT
DELISTED
Paragon 28, Inc.
FNA
| $180K | ﹤0.01% |
+14,600
| New | +$174K |
|
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.