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 |
Amazon
AMZN
|
+$170M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$71.3M |
| 3 |
AT&T
T
|
+$44.2M |
| 4 |
Meta Platforms (Facebook)
META
|
+$37.1M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$34.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Microsoft
MSFT
|
+$94.3M |
| 2 |
JPMorgan Chase
JPM
|
+$68.2M |
| 3 |
Citigroup
C
|
+$62.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$50.9M |
| 5 |
SPDR Gold Trust
GLD
|
+$46.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.38% |
| 2 | Technology | 0.35% |
| 3 | Communication Services | 0.24% |
| 4 | Healthcare | 0.2% |
| 5 | Consumer Staples | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
5801
PUT
Embecta
EMBC
$216M
| $53K | ﹤0.01% |
+2,100
| New | +$64.1K |
|
5802
PUT
Energizer
ENR
$1.44B
| $53K | ﹤0.01% |
1,600
+700
| +78% | +$21.5K |
|
5803
CALL
Cedar Fair
FUN
$1.77B
| $53K | ﹤0.01% |
1,300
| – | – |
|
5804
Greif
GEF
$4.92B
| $53K | ﹤0.01% |
+794
| New | +$53.5K |
|
|
GPMT
5805
PUT
Granite Point Mortgage Trust
GPMT
$69M
| $53K | ﹤0.01% |
10,000
+2,300
| +30% | +$14.9K |
|
|
KREF
5806
PUT
KKR Real Estate Finance Trust
KREF
$448M
| $53K | ﹤0.01% |
3,800
+3,200
| +533% | +$52.2K |
|
5807
Landstar System
LSTR
$5.93B
| $53K | ﹤0.01% |
326
-10,420
| -97% | -$1.67M |
|
5808
PUT
OneSpaWorld
OSW
$2.61B
| $53K | ﹤0.01% |
5,700
+1,600
| +39% | +$15.1K |
|
5809
Patrick Industries
PATK
$2.74B
| $53K | ﹤0.01% |
1,331
-345
| -21% | -$12K |
|
5810
Virtus InfraCap US Preferred Stock ETF
PFFA
$2.45B
| $53K | ﹤0.01% |
+2,931
| New | +$55.3K |
|
|
VMEO
5811
CALL
DELISTED
Vimeo
VMEO
| $53K | ﹤0.01% |
15,700
-97,200
| -86% | -$376K |
|
|
PYCR
5812
CALL
DELISTED
Paycor HCM, Inc. Common Stock
PYCR
| $53K | ﹤0.01% |
2,200
-4,500
| -67% | -$125K |
|
|
LUNA
5813
PUT
DELISTED
Luna Innovations Incorporated
LUNA
| $53K | ﹤0.01% |
6,100
+5,700
| +1,425% | +$36.1K |
|
5814
PUT
C3.ai
AI
$1.43B
| $52K | ﹤0.01% |
4,700
-36,100
| -88% | -$452K |
|
5815
Alector
ALEC
$168M
| $52K | ﹤0.01% |
+5,726
| New | +$49.9K |
|
5816
BWX Technologies
BWXT
$15.5B
| $52K | ﹤0.01% |
910
-9,911
| -92% | -$569K |
|
|
CMBM
5817
PUT
DELISTED
Cambium Networks
CMBM
| $52K | ﹤0.01% |
2,400
-3,400
| -59% | -$68.6K |
|
5818
CALL
Encore Capital Group
ECPG
$2.02B
| $52K | ﹤0.01% |
1,100
-3,000
| -73% | -$145K |
|
|
EVAX
5819
CALL
Evaxion A/S
EVAX
$23.5M
| $52K | ﹤0.01% |
592
-46
| -7% | -$5.38K |
|
|
EXK
5820
CALL
Endeavour Silver
EXK
$2.23B
| $52K | ﹤0.01% |
16,300
-79,600
| -83% | -$268K |
|
5821
PUT
Fulton Financial
FULT
$4.66B
| $52K | ﹤0.01% |
+3,100
| New | +$54.3K |
|
5822
GDS Holdings
GDS
$6.56B
| $52K | ﹤0.01% |
2,542
-68,469
| -96% | -$1.05M |
|
5823
Highwoods Properties
HIW
$3.65B
| $52K | ﹤0.01% |
1,868
-510
| -21% | -$14.2K |
|
5824
CALL
Herc Holdings
HRI
$5.02B
| $52K | ﹤0.01% |
400
+100
| +33% | +$12.3K |
|
5825
PUT
Kiniksa Pharmaceuticals
KNSA
$5.8B
| $52K | ﹤0.01% |
+3,500
| New | +$51K |
|
Similar funds
Simplex Trading's Q4 2022 Portfolio in Review
As of Q4 2022, Simplex Trading held 11,206 positions worth $91.9B, up 3.9% from $88.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q4 2022 filing shows 1,219 new, 3,365 increased, 4,370 reduced and 1,942 closed positions. Its largest new stake was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M. The largest sale was Microsoft, an estimated $94.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.38% of assets, up from 0.3% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q4 2022 buy was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M.
- Simplex Trading added most to Amazon in Q4 2022, an estimated $170M increase.
- Simplex Trading's biggest Q4 2022 reduction was Microsoft, cutting an estimated $94.3M.
- Simplex Trading fully exited JPMorgan Chase in Q4 2022, selling an estimated $68.2M.
- Simplex Trading's ten largest holdings make up 34% of its $91.9B portfolio in Q4 2022.
- Simplex Trading opened 1,219 new positions and closed 1,942 in Q4 2022.
- Simplex Trading's portfolio value rose 3.9% quarter-over-quarter to $91.9B.
Based on Simplex Trading's 13F filing for Q4 2022, filed 2 Feb 2023.