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 | |
|---|---|---|---|---|---|---|
6751
A10 Networks
ATEN
$2.13B
| $22K | ﹤0.01% |
+1,323
| New | +$22.7K |
|
6752
PUT
Atossa Therapeutics
ATOS
$20.6M
| $22K | ﹤0.01% |
2,820
-10,207
| -78% | -$117K |
|
6753
AtriCure
ATRC
$1.92B
| $22K | ﹤0.01% |
500
-658
| -57% | -$27.5K |
|
|
BCIM
6754
CALL
DELISTED
abrdn Bloomberg Industrial Metals Strategy K-1 Free ETF
BCIM
| $22K | ﹤0.01% |
1,000
-700
| -41% | -$16.4K |
|
6755
Bread Financial
BFH
$4.37B
| $22K | ﹤0.01% |
+601
| New | +$21.7K |
|
6756
CALL
BGSF Inc
BGSF
$59.5M
| $22K | ﹤0.01% |
1,500
+800
| +114% | +$10.2K |
|
6757
CALL
Bioceres Crop Solutions
BIOX
$23M
| $22K | ﹤0.01% |
1,900
-800
| -30% | -$10.4K |
|
6758
PUT
Cabaletta Bio
CABA
$437M
| $22K | ﹤0.01% |
+2,400
| New | +$8.74K |
|
6759
CALL
Cars.com
CARS
$662M
| $22K | ﹤0.01% |
1,600
-67,000
| -98% | -$908K |
|
6760
PUT
Clarivate
CLVT
$1.27B
| $22K | ﹤0.01% |
2,700
-3,600
| -57% | -$33.8K |
|
6761
Cogent Biosciences
COGT
$6.65B
| $22K | ﹤0.01% |
1,929
-3,624
| -65% | -$44.9K |
|
6762
PUT
Diodes
DIOD
$3.78B
| $22K | ﹤0.01% |
+300
| New | +$23.5K |
|
6763
CALL
Eagle Bancorp
EGBN
$846M
| $22K | ﹤0.01% |
+500
| New | +$22.6K |
|
6764
PUT
Enerpac Tool Group
EPAC
$1.83B
| $22K | ﹤0.01% |
900
-1,200
| -57% | -$28.9K |
|
|
ETWO
6765
PUT
DELISTED
E2open Parent Holdings
ETWO
| $22K | ﹤0.01% |
3,800
+3,500
| +1,167% | +$20.1K |
|
6766
Galectin Therapeutics
GALT
$196M
| $22K | ﹤0.01% |
19,723
+9,293
| +89% | +$12.4K |
|
6767
PUT
Gevo
GEVO
$360M
| $22K | ﹤0.01% |
12,000
-11,400
| -49% | -$24K |
|
|
GORV
6768
PUT
DELISTED
Lazydays
GORV
| $22K | ﹤0.01% |
+63
| New | +$24.7K |
|
6769
CALL
Harmony Biosciences
HRMY
$2.04B
| $22K | ﹤0.01% |
400
-14,300
| -97% | -$786K |
|
6770
CALL
Kiniksa Pharmaceuticals
KNSA
$5.8B
| $22K | ﹤0.01% |
1,500
-26,100
| -95% | -$380K |
|
6771
PUT
Littelfuse
LFUS
$11.2B
| $22K | ﹤0.01% |
100
-200
| -67% | -$44.6K |
|
6772
Limoneira
LMNR
$235M
| $22K | ﹤0.01% |
+1,846
| New | +$23.7K |
|
6773
PUT
MakeMyTrip
MMYT
$5.36B
| $22K | ﹤0.01% |
800
-10,200
| -93% | -$294K |
|
|
ORIO
6774
CALL
Orion Digital Corp
ORIO
$15.4M
| $22K | ﹤0.01% |
14,300
| – | – |
|
6775
PLAYSTUDIOS Inc
MYPS
$77.9M
| $22K | ﹤0.01% |
5,733
-19,131
| -77% | -$76.7K |
|
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.