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 | |
|---|---|---|---|---|---|---|
3126
PUT
Kyndryl
KD
$2.81B
| $512K | ﹤0.01% |
46,100
-327,800
| -88% | -$3.3M |
|
3127
PUT
BorgWarner
BWA
$13.1B
| $511K | ﹤0.01% |
14,427
-62,935
| -81% | -$2.14M |
|
|
LDTC
3128
CALL
DELISTED
LeddarTech
LDTC
| $511K | ﹤0.01% |
102,800
-28,400
| -22% | -$142K |
|
3129
PUT
Reinsurance Group of America
RGA
$15.7B
| $511K | ﹤0.01% |
3,600
+1,500
| +71% | +$209K |
|
3130
Vermilion Energy
VET
$1.62B
| $511K | ﹤0.01% |
28,919
-82,401
| -74% | -$1.67M |
|
3131
PUT
Liquidia Corp
LQDA
$7.51B
| $510K | ﹤0.01% |
80,200
-51,200
| -39% | -$275K |
|
3132
Schwab US Broad Market ETF
SCHB
$42.8B
| $510K | ﹤0.01% |
34,191
+7,428
| +28% | +$112K |
|
|
ENLC
3133
CALL
DELISTED
ENLINK MIDSTREAM, LLC
ENLC
| $510K | ﹤0.01% |
41,500
-6,400
| -13% | -$73.9K |
|
3134
PUT
OneMain Financial
OMF
$7.08B
| $509K | ﹤0.01% |
15,300
-91,100
| -86% | -$3.23M |
|
3135
Trinity Industries
TRN
$2.95B
| $509K | ﹤0.01% |
17,222
+5,297
| +44% | +$148K |
|
|
XM
3136
CALL
DELISTED
Qualtrics International Inc. Class A Common Stock
XM
| $509K | ﹤0.01% |
49,100
-71,400
| -59% | -$748K |
|
3137
CALL
GFL Environmental
GFL
$14.1B
| $508K | ﹤0.01% |
17,400
-19,900
| -53% | -$540K |
|
|
EMBK
3138
CALL
DELISTED
Embark Technology, Inc. Common Stock
EMBK
| $507K | ﹤0.01% |
154,200
-1,100
| -0.7% | -$5.38K |
|
3139
Coeur Mining
CDE
$15.8B
| $505K | ﹤0.01% |
150,350
-106,975
| -42% | -$380K |
|
3140
Teekay
TK
$974M
| $505K | ﹤0.01% |
111,403
+25,087
| +29% | +$104K |
|
3141
CALL
Veracyte
VCYT
$4.44B
| $505K | ﹤0.01% |
21,300
-14,500
| -41% | -$337K |
|
3142
CALL
Bio-Rad Laboratories Class A
BIO
$8.47B
| $504K | ﹤0.01% |
1,200
-5,700
| -83% | -$2.3M |
|
3143
PUT
Howard Hughes
HHH
$3.93B
| $504K | ﹤0.01% |
6,923
+6,608
| +2,098% | +$421K |
|
3144
PUT
Dine Brands
DIN
$448M
| $503K | ﹤0.01% |
7,800
+4,500
| +136% | +$313K |
|
|
WCN
3145
PUT
Waste Connections
WCN
$42.7B
| $503K | ﹤0.01% |
+3,800
| New | +$517K |
|
|
3146
CALL
Coeur Mining
CDE
$15.8B
| $502K | ﹤0.01% |
149,500
+43,800
| +41% | +$156K |
|
3147
CALL
McEwen Inc
MUX
$1.04B
| $502K | ﹤0.01% |
85,700
-101,500
| -54% | -$472K |
|
3148
CALL
Natera
NTRA
$37B
| $502K | ﹤0.01% |
12,500
-43,300
| -78% | -$1.78M |
|
3149
CALL
Public Service Enterprise Group
PEG
$39.5B
| $502K | ﹤0.01% |
8,200
-49,900
| -86% | -$2.9M |
|
3150
PUT
Stride
LRN
$3.83B
| $500K | ﹤0.01% |
16,000
+100
| +0.6% | +$3.67K |
|
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.