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 | |
|---|---|---|---|---|---|---|
|
MOMO
2601
CALL
Hello Group
MOMO
$869M
| $983K | ﹤0.01% |
108,100
-25,000
| -19% | -$239K |
|
2602
CVR Partners
UAN
$1.3B
| $983K | ﹤0.01% |
+11,024
| New | +$1.07M |
|
2603
CALL
Aviat Networks
AVNW
$262M
| $982K | ﹤0.01% |
28,500
+18,800
| +194% | +$639K |
|
2604
CALL
Axos Financial
AX
$5.45B
| $982K | ﹤0.01% |
26,600
+23,200
| +682% | +$1M |
|
2605
SSR Mining
SSRM
$5.57B
| $982K | ﹤0.01% |
65,009
+36,728
| +130% | +$560K |
|
2606
CALL
Clear Secure
YOU
$5.26B
| $981K | ﹤0.01% |
37,500
-15,700
| -30% | -$446K |
|
2607
CALL
Clearfield
CLFD
$421M
| $978K | ﹤0.01% |
21,000
-200
| -0.9% | -$12.9K |
|
|
CERE
2608
CALL
DELISTED
Cerevel Therapeutics Holdings, Inc. Common Stock
CERE
| $975K | ﹤0.01% |
40,000
+7,600
| +23% | +$223K |
|
|
NMTR
2609
CALL
DELISTED
9 Meters Biopharma
NMTR
| $972K | ﹤0.01% |
699,500
-82,300
| -11% | -$155K |
|
2610
PUT
Digital Turbine
APPS
$1.02B
| $970K | ﹤0.01% |
78,500
+6,300
| +9% | +$84.7K |
|
|
BLUE
2611
PUT
DELISTED
bluebird bio
BLUE
| $970K | ﹤0.01% |
15,260
+8,340
| +121% | +$952K |
|
2612
CALL
IMAX
IMAX
$2.38B
| $970K | ﹤0.01% |
50,600
+31,700
| +168% | +$546K |
|
2613
PUT
Trupanion
TRUP
$1.05B
| $969K | ﹤0.01% |
22,600
+18,600
| +465% | +$1.01M |
|
2614
EQT Corp
EQT
$33.2B
| $968K | ﹤0.01% |
30,346
-55,142
| -65% | -$1.77M |
|
2615
Asana
ASAN
$1.58B
| $967K | ﹤0.01% |
45,766
+19,919
| +77% | +$330K |
|
2616
Cognyte Software
CGNT
$612M
| $966K | ﹤0.01% |
285,151
-18,230
| -6% | -$65.7K |
|
|
DADA
2617
PUT
DELISTED
Dada Nexus
DADA
| $966K | ﹤0.01% |
114,100
+107,500
| +1,629% | +$1.17M |
|
|
VSXY
2618
PUT
Victoria's Secret
VSXY
$6.64B
| $966K | ﹤0.01% |
28,300
+10,700
| +61% | +$397K |
|
2619
Sotera Health
SHC
$4.95B
| $965K | ﹤0.01% |
53,913
+37,497
| +228% | +$627K |
|
2620
PUT
XPO
XPO
$25B
| $965K | ﹤0.01% |
33,800
-34,400
| -50% | -$1.24M |
|
2621
CALL
Invesco Mortgage Capital
IVR
$776M
| $964K | ﹤0.01% |
87,000
-346,700
| -80% | -$4.47M |
|
2622
Rogers Corp
ROG
$2.33B
| $964K | ﹤0.01% |
5,900
| – | – |
|
2623
PUT
ResMed
RMD
$28.3B
| $963K | ﹤0.01% |
4,400
-12,400
| -74% | -$2.69M |
|
2624
PUT
Jefferies Financial Group
JEF
$12.9B
| $962K | ﹤0.01% |
36,600
+31,998
| +695% | +$1.16M |
|
|
EXE
2625
Expand Energy Corp
EXE
$21.9B
| $961K | ﹤0.01% |
+12,650
| New | +$1.04M |
|
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.