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 | |
|---|---|---|---|---|---|---|
3926
CALL
Akebia Therapeutics
AKBA
$341M
| $253K | ﹤0.01% |
440,000
-97,200
| -18% | -$30.5K |
|
3927
CALL
nVent Electric
NVT
$22.9B
| $253K | ﹤0.01% |
6,600
+3,600
| +120% | +$133K |
|
3928
PUT
Repligen
RGEN
$7.11B
| $253K | ﹤0.01% |
1,500
-4,700
| -76% | -$853K |
|
3929
TETRA Technologies
TTI
$1.07B
| $253K | ﹤0.01% |
73,342
+17,938
| +32% | +$69.8K |
|
|
BAND
3930
CALL
Bandwidth Inc
BAND
$1.67B
| $252K | ﹤0.01% |
11,000
+400
| +4% | +$7.28K |
|
3931
iShares US Industrials ETF
IYJ
$2B
| $252K | ﹤0.01% |
+2,622
| New | +$247K |
|
|
RNAM
3932
CALL
DELISTED
Avidity Biosciences
RNAM
| $252K | ﹤0.01% |
11,400
+9,600
| +533% | +$143K |
|
3933
PUT
SBA Communications
SBAC
$18.6B
| $252K | ﹤0.01% |
900
-2,600
| -74% | -$724K |
|
3934
CALL
Twist Bioscience
TWST
$5.51B
| $252K | ﹤0.01% |
10,600
+7,400
| +231% | +$215K |
|
3935
Erie Indemnity
ERIE
$12.7B
| $251K | ﹤0.01% |
1,013
+994
| +5,232% | +$256K |
|
|
NGM
3936
CALL
DELISTED
NGM Biopharmaceuticals, Inc. Common Stock
NGM
| $251K | ﹤0.01% |
50,000
+6,600
| +15% | +$41.4K |
|
3937
Ambev
ABEV
$48.4B
| $250K | ﹤0.01% |
92,026
-14,326
| -13% | -$41.7K |
|
|
AHT
3938
CALL
Ashford Hospitality Trust
AHT
$20.9M
| $250K | ﹤0.01% |
5,600
-1,330
| -19% | -$85.7K |
|
3939
CALL
Allogene Therapeutics
ALLO
$573M
| $250K | ﹤0.01% |
39,800
+24,900
| +167% | +$231K |
|
3940
CALL
Designer Brands
DBI
$322M
| $250K | ﹤0.01% |
25,600
-5,200
| -17% | -$70.1K |
|
3941
CALL
G-III Apparel Group
GIII
$1.55B
| $250K | ﹤0.01% |
18,300
+17,100
| +1,425% | +$288K |
|
3942
CALL
Ormat Technologies
ORA
$6.05B
| $250K | ﹤0.01% |
2,900
-2,800
| -49% | -$251K |
|
3943
CALL
Oramed Pharmaceuticals
ORMP
$171M
| $250K | ﹤0.01% |
20,800
-9,300
| -31% | -$72.3K |
|
3944
Global X NASDAQ-100 Covered Call ETF
QYLD
$7.99B
| $250K | ﹤0.01% |
+15,761
| New | +$255K |
|
|
TRVG
3945
CALL
trivago
TRVG
$387M
| $250K | ﹤0.01% |
37,100
+7,600
| +26% | +$46.7K |
|
3946
PUT
World Acceptance Corp
WRLD
$880M
| $250K | ﹤0.01% |
3,800
+2,800
| +280% | +$221K |
|
3947
Cellebrite
CLBT
$3.7B
| $249K | ﹤0.01% |
57,267
+38,904
| +212% | +$174K |
|
3948
PUT
Capital Southwest
CSWC
$1.48B
| $249K | ﹤0.01% |
14,600
+12,000
| +462% | +$215K |
|
3949
FTAI Aviation
FTAI
$21.8B
| $249K | ﹤0.01% |
14,579
-61,770
| -81% | -$1.04M |
|
|
HEES
3950
CALL
DELISTED
H&E Equipment Services
HEES
| $249K | ﹤0.01% |
5,500
+2,200
| +67% | +$85.2K |
|
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.