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 | |
|---|---|---|---|---|---|---|
5451
Schrodinger
SDGR
$1.12B
| $71K | ﹤0.01% |
+3,805
| New | +$78.9K |
|
5452
PUT
Talos Energy
TALO
$2.47B
| $71K | ﹤0.01% |
3,800
-11,300
| -75% | -$227K |
|
5453
Trade Desk
TTD
$8.44B
| $71K | ﹤0.01% |
1,600
| – | – |
|
|
NVTA
5454
DELISTED
Invitae Corporation
NVTA
| $71K | ﹤0.01% |
38,350
-228,947
| -86% | -$559K |
|
5455
PUT
Alto Ingredients
ALTO
$363M
| $70K | ﹤0.01% |
24,400
-40,500
| -62% | -$144K |
|
5456
Anixa Biosciences
ANIX
$115M
| $70K | ﹤0.01% |
16,494
+4,196
| +34% | +$20.2K |
|
5457
Popular Inc
BPOP
$11.2B
| $70K | ﹤0.01% |
+1,065
| New | +$74.1K |
|
5458
Douglas Elliman
DOUG
$156M
| $70K | ﹤0.01% |
18,071
+16,763
| +1,282% | +$66.9K |
|
5459
PUT
DTE Energy
DTE
$29.5B
| $70K | ﹤0.01% |
600
-600
| -50% | -$68K |
|
5460
ProShares UltraShort Dow 30
DXD
$42.2M
| $70K | ﹤0.01% |
1,621
-13,246
| -89% | -$604K |
|
5461
Embecta
EMBC
$213M
| $70K | ﹤0.01% |
2,770
+1,203
| +77% | +$36.7K |
|
|
FARO
5462
CALL
DELISTED
Faro Technologies
FARO
| $70K | ﹤0.01% |
2,400
-18,300
| -88% | -$544K |
|
5463
CALL
Fidus Investment
FDUS
$747M
| $70K | ﹤0.01% |
3,700
+2,500
| +208% | +$47.5K |
|
5464
PUT
Inovio Pharmaceuticals
INO
$54.3M
| $70K | ﹤0.01% |
3,750
-600
| -14% | -$13.6K |
|
5465
Lifecore Biomedical
LFCR
$162M
| $70K | ﹤0.01% |
10,874
+8,440
| +347% | +$69.6K |
|
5466
CALL
Primerica
PRI
$10B
| $70K | ﹤0.01% |
500
-1,300
| -72% | -$181K |
|
5467
TH International
THCH
$57.3M
| $70K | ﹤0.01% |
5,071
-1,421
| -22% | -$26.6K |
|
5468
iShares 10-20 Year Treasury Bond ETF
TLH
$10.9B
| $70K | ﹤0.01% |
653
+595
| +1,026% | +$64.5K |
|
5469
US Commodity Index
USCI
$371M
| $70K | ﹤0.01% |
+1,245
| New | +$68.1K |
|
|
UXIN
5470
CALL
Uxin Ltd
UXIN
$310M
| $70K | ﹤0.01% |
2,440
+2,025
| +488% | +$72.7K |
|
5471
CALL
Westlake Chemical Partners
WLKP
$763M
| $70K | ﹤0.01% |
3,000
-10,000
| -77% | -$227K |
|
|
TSP
5472
CALL
DELISTED
TuSimple Holdings Inc. Class A Common Stock
TSP
| $70K | ﹤0.01% |
43,100
+5,200
| +14% | +$18.5K |
|
|
JJN
5473
DELISTED
iPath Series B Bloomberg Nickel Subindex Total ReturnSM ETN
JJN
| $70K | ﹤0.01% |
1,785
-666
| -27% | -$22.6K |
|
|
PRTY
5474
PUT
DELISTED
Party City Holdco Inc.
PRTY
| $70K | ﹤0.01% |
45,500
-107,500
| -70% | -$108K |
|
5475
PUT
Ametek
AME
$55.7B
| $69K | ﹤0.01% |
500
-11,300
| -96% | -$1.5M |
|
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.