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 |
Walmart Inc
WMT
|
+$43.6M |
| 2 |
Apple
AAPL
|
+$40.9M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$37.7M |
| 4 |
Citigroup
C
|
+$34.2M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$32.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$189M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 3 |
NVIDIA
NVDA
|
+$115M |
| 4 |
Tesla
TSLA
|
+$52M |
| 5 |
Meta Platforms (Facebook)
META
|
+$49M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.42% |
| 2 | Consumer Discretionary | 0.2% |
| 3 | Healthcare | 0.17% |
| 4 | Industrials | 0.15% |
| 5 | Communication Services | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
5751
CALL
Ichor Holdings
ICHR
$2.62B
| $58K | ﹤0.01% |
1,800
-1,800
| -50% | -$57.8K |
|
5752
CALL
Jones Lang LaSalle
JLL
$16.3B
| $58K | ﹤0.01% |
400
-100
| -20% | -$16.7K |
|
5753
Global X MLP ETF
MLPA
$2.3B
| $58K | ﹤0.01% |
+1,416
| New | +$59.9K |
|
5754
PUT
Navitas Semiconductor
NVTS
$2.84B
| $58K | ﹤0.01% |
8,000
+6,000
| +300% | +$33.6K |
|
5755
CALL
Ocean Power Technologies
OPTT
$48.9M
| $58K | ﹤0.01% |
111,100
-13,900
| -11% | -$8.49K |
|
5756
PUT
Triumph Financial Inc
TFIN
$1.81B
| $58K | ﹤0.01% |
+1,000
| New | +$57.3K |
|
5757
PUT
Tetra Tech
TTEK
$8.49B
| $58K | ﹤0.01% |
+2,000
| New | +$57.8K |
|
5758
PUT
Universal Electronics
UEIC
$57.8M
| $58K | ﹤0.01% |
5,800
+5,200
| +867% | +$90.5K |
|
5759
CALL
Vericel Corp
VCEL
$2.35B
| $58K | ﹤0.01% |
2,000
-3,500
| -64% | -$101K |
|
5760
West Fraser Timber
WFG
$5.08B
| $58K | ﹤0.01% |
826
+30
| +4% | +$2.31K |
|
5761
CALL
Workhorse Group
WKHS
$33.2M
| $58K | ﹤0.01% |
15
-113
| -88% | -$624K |
|
5762
CALL
Metallus
MTUS
$838M
| $58K | ﹤0.01% |
3,200
+2,800
| +700% | +$52.3K |
|
|
NAPA
5763
PUT
DELISTED
The Duckhorn Portfolio, Inc.
NAPA
| $58K | ﹤0.01% |
3,700
+3,200
| +640% | +$50.3K |
|
|
ME
5764
PUT
DELISTED
23andMe Holding Co
ME
| $58K | ﹤0.01% |
1,275
-10,170
| -89% | -$491K |
|
|
ASXC
5765
CALL
DELISTED
Asensus Surgical, Inc.
ASXC
| $58K | ﹤0.01% |
89,200
-41,700
| -32% | -$28.2K |
|
|
AGS
5766
CALL
DELISTED
PlayAGS
AGS
| $57K | ﹤0.01% |
8,000
-26,300
| -77% | -$164K |
|
|
AMWD
5767
DELISTED
American Woodmark
AMWD
| $57K | ﹤0.01% |
+1,110
| New | +$60.1K |
|
5768
B&G Foods
BGS
$287M
| $57K | ﹤0.01% |
+3,698
| New | +$51.5K |
|
5769
PUT
Clean Harbors
CLH
$16.5B
| $57K | ﹤0.01% |
+400
| New | +$52.1K |
|
5770
PUT
First Financial Bankshares
FFIN
$5.04B
| $57K | ﹤0.01% |
+1,800
| New | +$62.6K |
|
|
FSP
5771
Franklin Street Properties
FSP
$47.2M
| $57K | ﹤0.01% |
36,676
-34,585
| -49% | -$86.8K |
|
5772
PUT
CGI
GIB
$15.1B
| $57K | ﹤0.01% |
+600
| New | +$53.9K |
|
5773
CALL
Genius Group
GNS
$28.4M
| $57K | ﹤0.01% |
+4,240
| New | +$145K |
|
5774
iPath Series B Carbon Exchange-Traded Notes
GRN
$23.6M
| $57K | ﹤0.01% |
1,611
-112
| -7% | -$3.9K |
|
|
HI
5775
CALL
DELISTED
Hillenbrand
HI
| $57K | ﹤0.01% |
1,200
+1,100
| +1,100% | +$50.5K |
|
Similar funds
Simplex Trading's Q1 2023 Portfolio in Review
As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading deployed $10.1B of net new capital in Q1 2023, opening 1,536 new positions and adding to 3,665 existing holdings. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M.
By sector, the portfolio is most concentrated in Technology at 0.42% of assets, up from 0.35% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Meta Platforms (Facebook), an estimated $49M trimmed.
- Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
- Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
- Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
- Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
- Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
- Simplex Trading opened 1,536 new positions and closed 1,729 in Q1 2023.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.
Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.