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 | |
|---|---|---|---|---|---|---|
4951
PUT
Surgery Partners
SGRY
$2.15B
| $120K | ﹤0.01% |
3,500
+500
| +17% | +$16.2K |
|
4952
CALL
Kartoon Studios
TOON
$34M
| $120K | ﹤0.01% |
44,200
+22,470
| +103% | +$102K |
|
4953
PUT
Trimble
TRMB
$13.6B
| $120K | ﹤0.01% |
2,300
+2,200
| +2,200% | +$117K |
|
4954
PUT
Energy Fuels
UUUU
$2.68B
| $120K | ﹤0.01% |
21,600
-7,000
| -24% | -$45.4K |
|
|
EQC
4955
CALL
DELISTED
Equity Commonwealth
EQC
| $120K | ﹤0.01% |
+5,800
| New | +$135K |
|
|
SQSP
4956
PUT
DELISTED
Squarespace, Inc.
SQSP
| $120K | ﹤0.01% |
3,800
-4,600
| -55% | -$114K |
|
|
HOLI
4957
DELISTED
Hollsys Automation Technologies INTERNATIONAL, LTD. COMMON (British Virgin Island)
HOLI
| $120K | ﹤0.01% |
6,956
+790
| +13% | +$14.2K |
|
|
SCU
4958
DELISTED
Sculptor Capital Management, Inc. Class A Common Stock
SCU
| $120K | ﹤0.01% |
13,949
+3,067
| +28% | +$27.5K |
|
4959
PUT
Alpha Pro Tech
APT
$49.9M
| $119K | ﹤0.01% |
28,700
-125,800
| -81% | -$522K |
|
4960
PUT
AudioCodes
AUDC
$239M
| $119K | ﹤0.01% |
+7,900
| New | +$134K |
|
4961
CALL
IQVIA
IQV
$40.7B
| $119K | ﹤0.01% |
600
-11,700
| -95% | -$2.5M |
|
|
LLAP
4962
CALL
DELISTED
Terran Orbital Corporation
LLAP
| $119K | ﹤0.01% |
64,800
+64,000
| +8,000% | +$123K |
|
4963
CALL
CBIZ
CBZ
$2.98B
| $118K | ﹤0.01% |
2,400
-1,100
| -31% | -$53K |
|
4964
CALL
American Century Diversified Corporate Bond ETF
KORP
$869M
| $118K | ﹤0.01% |
1,800
+1,000
| +125% | +$45.9K |
|
4965
CALL
SLR Investment Corp
SLRC
$704M
| $118K | ﹤0.01% |
7,900
+500
| +7% | +$7.51K |
|
4966
CALL
Upland Software
UPLD
$13.3M
| $118K | ﹤0.01% |
2,750
+1,620
| +143% | +$112K |
|
|
NETI
4967
PUT
DELISTED
Eneti Inc.
NETI
| $118K | ﹤0.01% |
12,700
+5,200
| +69% | +$52K |
|
4968
PUT
AST SpaceMobile
ASTS
$15.8B
| $117K | ﹤0.01% |
23,100
-400
| -2% | -$2.31K |
|
|
AVDX
4969
CALL
DELISTED
AvidXchange
AVDX
| $117K | ﹤0.01% |
15,100
+4,200
| +39% | +$40.4K |
|
4970
CALL
HUB Group
HUBG
$2.92B
| $117K | ﹤0.01% |
2,800
+1,600
| +133% | +$69.8K |
|
4971
CALL
Innodata
INOD
$1.81B
| $117K | ﹤0.01% |
13,800
+7,500
| +119% | +$42.4K |
|
4972
PUT
Jacobs Solutions
J
$16B
| $117K | ﹤0.01% |
1,209
+967
| +400% | +$96.5K |
|
|
KWY
4973
Kingsway Corp
KWY
$254M
| $117K | ﹤0.01% |
+13,286
| New | +$117K |
|
4974
Old Dominion Freight Line
ODFL
$46.3B
| $117K | ﹤0.01% |
+690
| New | +$116K |
|
4975
CALL
Playtika
PLTK
$1.53B
| $117K | ﹤0.01% |
10,400
-103,200
| -91% | -$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.