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 | |
|---|---|---|---|---|---|---|
|
CYBR
1726
CALL
DELISTED
CyberArk
CYBR
| $2.6M | ﹤0.01% |
17,600
-20,600
| -54% | -$2.88M |
|
1727
Kohl's
KSS
$2.03B
| $2.6M | ﹤0.01% |
110,627
+100,390
| +981% | +$2.83M |
|
1728
CALL
FT Vest Gold Strategy Target Income ETF
IGLD
$507M
| $2.6M | ﹤0.01% |
32,200
-73,600
| -70% | -$1.43M |
|
|
ITCI
1729
PUT
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $2.6M | ﹤0.01% |
48,000
+11,800
| +33% | +$571K |
|
|
FLG
1730
CALL
Flagstar Bank National Association
FLG
$5.77B
| $2.6M | ﹤0.01% |
95,800
+43,433
| +83% | +$1.18M |
|
|
EMBJ
1731
CALL
Embraer S.A. ADS
EMBJ
$11.6B
| $2.59M | ﹤0.01% |
158,400
+134,600
| +566% | +$1.79M |
|
|
NKLA
1732
CALL
DELISTED
Nikola Corporation Common Stock
NKLA
| $2.59M | ﹤0.01% |
71,387
-1,930
| -3% | -$127K |
|
|
VRAY
1733
PUT
DELISTED
ViewRay, Inc.
VRAY
| $2.59M | ﹤0.01% |
749,000
-720,300
| -49% | -$3.05M |
|
|
DM
1734
DELISTED
Desktop Metal, Inc.
DM
| $2.59M | ﹤0.01% |
112,529
+51,865
| +85% | +$979K |
|
1735
CALL
RUM Group Inc
RUM
$1.57B
| $2.59M | ﹤0.01% |
258,700
-35,100
| -12% | -$316K |
|
1736
CALL
Alaska Air
ALK
$5.15B
| $2.58M | ﹤0.01% |
61,600
-37,700
| -38% | -$1.77M |
|
|
NUVL
1737
CALL
DELISTED
Nuvalent
NUVL
| $2.58M | ﹤0.01% |
99,000
-1,100
| -1% | -$32.5K |
|
1738
SAP
SAP
$187B
| $2.58M | ﹤0.01% |
+20,402
| New | +$2.39M |
|
1739
Weyerhaeuser
WY
$17.3B
| $2.58M | ﹤0.01% |
85,537
+65,751
| +332% | +$2.07M |
|
1740
CALL
RLX Technology
RLX
$2.48B
| $2.58M | ﹤0.01% |
888,500
+168,100
| +23% | +$408K |
|
1741
PUT
Louisiana-Pacific
LPX
$5.2B
| $2.57M | ﹤0.01% |
47,500
-20,800
| -30% | -$1.27M |
|
1742
CALL
Jacobs Solutions
J
$15.9B
| $2.57M | ﹤0.01% |
26,476
+362
| +1% | +$36.1K |
|
1743
Constellation Energy
CEG
$98B
| $2.57M | ﹤0.01% |
+32,767
| New | +$2.65M |
|
|
AZUL
1744
CALL
DELISTED
Azul
AZUL
| $2.57M | ﹤0.01% |
359,100
+178,700
| +99% | +$1.12M |
|
1745
PUT
FLEX LNG
FLNG
$1.67B
| $2.56M | ﹤0.01% |
76,300
-19,100
| -20% | -$621K |
|
1746
PUT
e.l.f. Beauty
ELF
$4.56B
| $2.56M | ﹤0.01% |
31,100
+11,300
| +57% | +$762K |
|
1747
PUT
Royal Bank of Canada
RY
$291B
| $2.56M | ﹤0.01% |
26,800
-18,200
| -40% | -$1.8M |
|
1748
CALL
YPF
YPF
$20.2B
| $2.56M | ﹤0.01% |
232,900
+52,300
| +29% | +$576K |
|
1749
PUT
Ollie's Bargain Outlet
OLLI
$4.01B
| $2.55M | ﹤0.01% |
44,000
+32,600
| +286% | +$1.79M |
|
1750
PUT
Array Technologies
ARRY
$818M
| $2.55M | ﹤0.01% |
116,400
+98,600
| +554% | +$2.02M |
|
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.