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 | |
|---|---|---|---|---|---|---|
2476
CALL
Wyndham Hotels & Resorts
WH
$5.46B
| $1.14M | ﹤0.01% |
+16,800
| New | +$1.24M |
|
2477
CALL
Packaging Corp of America
PKG
$22.7B
| $1.14M | ﹤0.01% |
8,200
+7,800
| +1,950% | +$1.06M |
|
2478
PUT
AeroVironment
AVAV
$7.57B
| $1.14M | ﹤0.01% |
12,400
+9,200
| +288% | +$815K |
|
2479
CALL
Celldex Therapeutics
CLDX
$2.77B
| $1.14M | ﹤0.01% |
31,600
+26,800
| +558% | +$1.16M |
|
|
BRSL
2480
PUT
Brightstar Lottery PLC
BRSL
$1.91B
| $1.14M | ﹤0.01% |
42,400
-69,700
| -62% | -$1.78M |
|
2481
PUT
Murphy USA
MUSA
$11.3B
| $1.14M | ﹤0.01% |
4,400
+3,300
| +300% | +$859K |
|
2482
PUT
Vanguard Consumer Discretionary ETF
VCR
$5.84B
| $1.14M | ﹤0.01% |
3,200
-11,800
| -79% | -$2.87M |
|
2483
CALL
LPL Financial
LPLA
$26.3B
| $1.13M | ﹤0.01% |
5,600
+4,200
| +300% | +$960K |
|
2484
CALL
PTC Therapeutics
PTCT
$6.37B
| $1.13M | ﹤0.01% |
23,400
+22,800
| +3,800% | +$1.04M |
|
2485
CALL
uniQure
QURE
$2.68B
| $1.13M | ﹤0.01% |
56,300
-4,100
| -7% | -$86K |
|
2486
CALL
Weibo
WB
$1.9B
| $1.13M | ﹤0.01% |
56,500
-142,000
| -72% | -$2.9M |
|
|
ACCD
2487
PUT
DELISTED
Accolade Inc
ACCD
| $1.13M | ﹤0.01% |
78,800
+56,200
| +249% | +$636K |
|
2488
CALL
Vornado Realty Trust
VNO
$7.47B
| $1.13M | ﹤0.01% |
73,700
-141,800
| -66% | -$2.86M |
|
2489
Elanco Animal Health
ELAN
$12.4B
| $1.13M | ﹤0.01% |
120,250
-114,060
| -49% | -$1.35M |
|
2490
State Street SPDR Portfolio S&P 500 Value ETF
SPYV
$36.1B
| $1.13M | ﹤0.01% |
27,752
-12,255
| -31% | -$497K |
|
|
SGI
2491
CALL
Somnigroup International
SGI
$15.1B
| $1.13M | ﹤0.01% |
28,600
-207,500
| -88% | -$8.25M |
|
2492
PUT
O-I Glass
OI
$1.39B
| $1.13M | ﹤0.01% |
49,700
+45,900
| +1,208% | +$963K |
|
2493
PUT
BlackBerry
BB
$5.01B
| $1.13M | ﹤0.01% |
247,300
+62,100
| +34% | +$246K |
|
2494
iShares Core S&P Mid-Cap ETF
IJH
$123B
| $1.13M | ﹤0.01% |
22,545
+6,795
| +43% | +$346K |
|
2495
CALL
State Street Multi-Asset Real Return ETF
RLY
$1.26B
| $1.13M | ﹤0.01% |
27,200
+21,200
| +353% | +$590K |
|
2496
PUT
RPM International
RPM
$13.7B
| $1.13M | ﹤0.01% |
12,900
+12,700
| +6,350% | +$1.11M |
|
|
LNW
2497
PUT
DELISTED
Light & Wonder
LNW
| $1.12M | ﹤0.01% |
18,700
+12,500
| +202% | +$770K |
|
2498
CALL
International Seaways
INSW
$4.57B
| $1.12M | ﹤0.01% |
26,900
+20,600
| +327% | +$872K |
|
2499
PUT
Global Ship Lease
GSL
$1.57B
| $1.12M | ﹤0.01% |
59,700
+23,300
| +64% | +$435K |
|
|
XIFR
2500
CALL
XPLR Infrastructure LP
XIFR
$1.18B
| $1.12M | ﹤0.01% |
18,400
+5,400
| +42% | +$371K |
|
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.