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 | |
|---|---|---|---|---|---|---|
3926
CALL
Hyliion Holdings
HYLN
$631M
| $278K | ﹤0.01% |
140,800
+46,400
| +49% | +$129K |
|
3927
PUT
Jazz Pharmaceuticals
JAZZ
$16.1B
| $278K | ﹤0.01% |
1,900
-10,700
| -85% | -$1.58M |
|
3928
ProShares Ultra VIX Short-Term Futures ETF
UVXY
$237M
| $278K | ﹤0.01% |
+240
| New | +$321K |
|
3929
PUT
VirnetX Holding Corp
VHC
$54.4M
| $278K | ﹤0.01% |
10,630
+9,820
| +1,212% | +$318K |
|
3930
PUT
Hewlett Packard
HPE
$60.4B
| $277K | ﹤0.01% |
17,400
-46,500
| -73% | -$730K |
|
3931
PUT
InterDigital
IDCC
$6.72B
| $277K | ﹤0.01% |
3,800
-200
| -5% | -$13.9K |
|
3932
PUT
Vanguard Dividend Appreciation ETF
VIG
$113B
| $277K | ﹤0.01% |
1,800
-100
| -5% | -$15.3K |
|
3933
CALL
Centrus Energy
LEU
$3.34B
| $276K | ﹤0.01% |
8,600
-19,500
| -69% | -$749K |
|
|
PRO
3934
PUT
DELISTED
PROS Holdings
PRO
| $276K | ﹤0.01% |
10,100
+9,600
| +1,920% | +$250K |
|
|
SAGE
3935
CALL
DELISTED
Sage Therapeutics
SAGE
| $276K | ﹤0.01% |
6,600
-19,900
| -75% | -$856K |
|
3936
CALL
Universal Electronics
UEIC
$58.1M
| $276K | ﹤0.01% |
+27,300
| New | +$475K |
|
3937
PUT
United Microelectronic
UMC
$43.6B
| $276K | ﹤0.01% |
31,600
+19,900
| +170% | +$161K |
|
3938
PUT
United States 12 Month Oil Fund,
USL
$43.5M
| $276K | ﹤0.01% |
8,200
+7,800
| +1,950% | +$264K |
|
3939
CALL
Zymeworks
ZYME
$1.66B
| $276K | ﹤0.01% |
30,600
+14,100
| +85% | +$123K |
|
3940
PUT
Lindblad Expeditions
LIND
$1.95B
| $275K | ﹤0.01% |
28,800
+11,700
| +68% | +$118K |
|
|
NEWP
3941
PUT
New Pacific Metals
NEWP
$838M
| $275K | ﹤0.01% |
102,600
+74,600
| +266% | +$190K |
|
3942
PUT
Omnicell
OMCL
$1.96B
| $275K | ﹤0.01% |
4,700
+4,600
| +4,600% | +$254K |
|
|
ERF
3943
DELISTED
Enerplus Corporation
ERF
| $275K | ﹤0.01% |
19,149
+12,777
| +201% | +$206K |
|
3944
PUT
GoodRx Holdings
GDRX
$1.06B
| $274K | ﹤0.01% |
43,900
+11,200
| +34% | +$62.4K |
|
|
VSTO
3945
PUT
DELISTED
Vista Outdoor Inc.
VSTO
| $274K | ﹤0.01% |
9,900
-600
| -6% | -$16.4K |
|
3946
Brookfield Asset Management
BAM
$76.7B
| $273K | ﹤0.01% |
+8,350
| New | +$271K |
|
3947
CALL
Capital Southwest
CSWC
$1.48B
| $273K | ﹤0.01% |
15,400
-1,900
| -11% | -$35K |
|
3948
CALL
Manitowoc
MTW
$527M
| $273K | ﹤0.01% |
16,000
+15,600
| +3,900% | +$234K |
|
3949
PUT
Petco
WOOF
$811M
| $273K | ﹤0.01% |
30,400
+12,100
| +66% | +$125K |
|
3950
CALL
Bit Digital
BTBT
$459M
| $272K | ﹤0.01% |
176,700
-149,700
| -46% | -$191K |
|
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.