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 | |
|---|---|---|---|---|---|---|
2976
PUT
Expeditors International
EXPD
$22.9B
| $671K | ﹤0.01% |
6,100
+100
| +2% | +$10.9K |
|
2977
Energy Fuels
UUUU
$2.82B
| $670K | ﹤0.01% |
120,150
+119,672
| +25,036% | +$775K |
|
2978
CALL
Opko Health
OPK
$921M
| $669K | ﹤0.01% |
458,600
-32,700
| -7% | -$42.1K |
|
2979
Aldeyra Therapeutics
ALDX
$91.7M
| $668K | ﹤0.01% |
+67,325
| New | +$476K |
|
2980
PUT
Ionis Pharmaceuticals
IONS
$9.35B
| $668K | ﹤0.01% |
18,700
-28,600
| -60% | -$1.07M |
|
2981
PUT
Nautilus Biotechnolgy
NAUT
$215M
| $668K | ﹤0.01% |
+241,400
| New | +$506K |
|
2982
CALL
Pentair
PNR
$10.2B
| $668K | ﹤0.01% |
12,100
+6,600
| +120% | +$351K |
|
2983
CALL
SiTime
SITM
$16.6B
| $668K | ﹤0.01% |
4,700
+4,500
| +2,250% | +$552K |
|
2984
PUT
Suburban Propane Partners
SPH
$1.23B
| $667K | ﹤0.01% |
43,600
-2,100
| -5% | -$32.5K |
|
2985
PUT
Allogene Therapeutics
ALLO
$601M
| $666K | ﹤0.01% |
134,900
+134,200
| +19,171% | +$861K |
|
2986
PUT
Immersion
IMMR
$216M
| $666K | ﹤0.01% |
74,500
+74,300
| +37,150% | +$562K |
|
2987
CALL
Howmet Aerospace
HWM
$116B
| $665K | ﹤0.01% |
15,700
+1,000
| +7% | +$41K |
|
|
GTLS
2988
PUT
DELISTED
Chart Industries
GTLS
| $664K | ﹤0.01% |
5,300
+2,500
| +89% | +$322K |
|
2989
Tenet Healthcare
THC
$20.1B
| $664K | ﹤0.01% |
+11,176
| New | +$621K |
|
|
EBIX
2990
CALL
DELISTED
Ebix Inc
EBIX
| $664K | ﹤0.01% |
50,400
-44,900
| -47% | -$781K |
|
|
NVTA
2991
CALL
DELISTED
Invitae Corporation
NVTA
| $663K | ﹤0.01% |
491,800
+287,800
| +141% | +$567K |
|
2992
CALL
Icon
ICLR
$12.8B
| $662K | ﹤0.01% |
3,100
+1,400
| +82% | +$312K |
|
2993
CALL
Invesco
IVZ
$13.3B
| $662K | ﹤0.01% |
40,400
-1,000
| -2% | -$17.8K |
|
2994
PUT
U-Haul Holding Co Series N
UHAL.B
$12.2B
| $662K | ﹤0.01% |
11,100
+3,200
| +41% | +$182K |
|
2995
Vornado Realty Trust
VNO
$7.47B
| $662K | ﹤0.01% |
43,116
-39,564
| -48% | -$799K |
|
|
MTTR
2996
CALL
DELISTED
Matterport, Inc. Class A Common Stock
MTTR
| $660K | ﹤0.01% |
242,000
-275,100
| -53% | -$841K |
|
2997
CALL
Energy Vault
NRGV
$522M
| $659K | ﹤0.01% |
+308,300
| New | +$1.05M |
|
2998
CALL
FB Financial Corp
FBK
$2.95B
| $658K | ﹤0.01% |
21,200
+10,500
| +98% | +$375K |
|
2999
CALL
Establishment Labs
ESTA
$2.72B
| $657K | ﹤0.01% |
9,700
+6,800
| +234% | +$466K |
|
3000
Philips
PHG
$25.4B
| $657K | ﹤0.01% |
41,814
+20,685
| +98% | +$297K |
|
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.