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 | |
|---|---|---|---|---|---|---|
2651
PUT
WEC Energy
WEC
$37.7B
| $834K | ﹤0.01% |
8,900
+8,200
| +1,171% | +$758K |
|
2652
ProShares UltraPro S&P 500
UPRO
$5.1B
| $832K | ﹤0.01% |
25,415
-124,224
| -83% | -$4.24M |
|
|
EH
2653
CALL
EHang Holdings
EH
$372M
| $831K | ﹤0.01% |
96,900
+64,300
| +197% | +$335K |
|
2654
Vanguard Real Estate ETF
VNQ
$39.9B
| $831K | ﹤0.01% |
+10,087
| New | +$836K |
|
2655
Conagra Brands
CAG
$7.07B
| $830K | ﹤0.01% |
21,457
+1,421
| +7% | +$51.5K |
|
2656
CALL
Post Holdings
POST
$4.12B
| $830K | ﹤0.01% |
9,200
+4,900
| +114% | +$437K |
|
2657
CALL
Planet Labs
PL
$7.3B
| $828K | ﹤0.01% |
190,500
-174,100
| -48% | -$901K |
|
2658
Vanguard Information Technology ETF
VGT
$139B
| $828K | ﹤0.01% |
20,760
-34,080
| -62% | -$1.39M |
|
2659
CALL
Autoliv
ALV
$8.6B
| $827K | ﹤0.01% |
10,800
-30,400
| -74% | -$2.43M |
|
|
IRBT
2660
CALL
DELISTED
iRobot
IRBT
| $827K | ﹤0.01% |
17,200
-1,200
| -7% | -$63.4K |
|
|
DM
2661
DELISTED
Desktop Metal, Inc.
DM
| $825K | ﹤0.01% |
60,664
+16,895
| +39% | +$352K |
|
2662
CALL
Extra Space Storage
EXR
$31.2B
| $824K | ﹤0.01% |
5,600
+4,700
| +522% | +$751K |
|
2663
PUT
Fluence Energy
FLNC
$1.78B
| $823K | ﹤0.01% |
48,000
+4,300
| +10% | +$67.7K |
|
2664
CALL
Global Net Lease
GNL
$1.87B
| $823K | ﹤0.01% |
65,500
| – | – |
|
2665
CALL
Amplify Online Retail ETF
IBUY
$106M
| $823K | ﹤0.01% |
46,100
-152,800
| -77% | -$6.23M |
|
2666
PUT
Nordic American Tanker
NAT
$1.37B
| $823K | ﹤0.01% |
269,000
+8,600
| +3% | +$27.7K |
|
2667
PUT
RLX Technology
RLX
$2.48B
| $823K | ﹤0.01% |
+358,100
| New | +$636K |
|
|
DFTX
2668
PUT
Definium Therapeutics
DFTX
$5.73B
| $821K | ﹤0.01% |
373,300
-287,300
| -43% | -$798K |
|
2669
CALL
United States Gasoline Fund
UGA
$142M
| $821K | ﹤0.01% |
13,700
-42,200
| -75% | -$2.43M |
|
|
EVA
2670
CALL
DELISTED
Enviva Inc.
EVA
| $821K | ﹤0.01% |
15,500
+10,200
| +192% | +$583K |
|
2671
PUT
Qualys
QLYS
$4.84B
| $819K | ﹤0.01% |
7,300
+7,100
| +3,550% | +$887K |
|
2672
CALL
Broadridge
BR
$17.2B
| $818K | ﹤0.01% |
6,100
+700
| +13% | +$99.4K |
|
2673
CALL
Hims & Hers Health
HIMS
$6.5B
| $818K | ﹤0.01% |
127,700
-133,500
| -51% | -$760K |
|
2674
PUT
International Flavors & Fragrances
IFF
$19.4B
| $817K | ﹤0.01% |
7,800
-57,200
| -88% | -$5.62M |
|
2675
CALL
AST SpaceMobile
ASTS
$16.8B
| $816K | ﹤0.01% |
169,400
-85,600
| -34% | -$516K |
|
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.