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 | |
|---|---|---|---|---|---|---|
2301
PUT
Ryan Specialty Holdings
RYAN
$5.41B
| $1.36M | ﹤0.01% |
33,800
+33,500
| +11,167% | +$1.38M |
|
|
CNH
2302
CALL
CNH Industrial
CNH
$13.8B
| $1.36M | ﹤0.01% |
89,100
+50,100
| +128% | +$811K |
|
2303
CALL
Artisan Partners
APAM
$2.79B
| $1.36M | ﹤0.01% |
42,500
+23,300
| +121% | +$782K |
|
2304
CALL
FLEX LNG
FLNG
$1.67B
| $1.36M | ﹤0.01% |
40,400
+25,200
| +166% | +$820K |
|
2305
PUT
Elanco Animal Health
ELAN
$12.4B
| $1.35M | ﹤0.01% |
144,200
-298,800
| -67% | -$3.52M |
|
2306
Invesco Solar ETF
TAN
$1.47B
| $1.35M | ﹤0.01% |
17,453
-74,392
| -81% | -$5.7M |
|
2307
CALL
B&G Foods
BGS
$285M
| $1.35M | ﹤0.01% |
87,100
+4,400
| +5% | +$61.3K |
|
2308
CALL
Warrior Met Coal
HCC
$4.23B
| $1.35M | ﹤0.01% |
36,800
+36,600
| +18,300% | +$1.35M |
|
2309
PUT
Omnicom Group
OMC
$22.7B
| $1.35M | ﹤0.01% |
14,300
-1,700
| -11% | -$151K |
|
2310
Liberty Global Class A
LBTYA
$3.31B
| $1.35M | ﹤0.01% |
69,077
-2,562
| -4% | -$52.1K |
|
2311
Silicon Motion
SIMO
$9.19B
| $1.35M | ﹤0.01% |
+20,572
| New | +$1.35M |
|
2312
PUT
Adecoagro
AGRO
$1.53B
| $1.35M | ﹤0.01% |
166,400
+132,000
| +384% | +$1.06M |
|
2313
Tenaris
TS
$29.1B
| $1.34M | ﹤0.01% |
+47,270
| New | +$1.56M |
|
2314
PUT
Ventas
VTR
$48.9B
| $1.34M | ﹤0.01% |
31,000
-90,400
| -74% | -$4.36M |
|
2315
PUT
Amplify Online Retail ETF
IBUY
$106M
| $1.34M | ﹤0.01% |
64,100
-59,400
| -48% | -$2.66M |
|
2316
Accel Entertainment
ACEL
$979M
| $1.34M | ﹤0.01% |
147,272
+146,240
| +14,171% | +$1.31M |
|
2317
Alexandria Real Estate Equities
ARE
$8.88B
| $1.34M | ﹤0.01% |
10,672
+126
| +1% | +$18.5K |
|
2318
PUT
Ascendis Pharma A/S
ASND
$16.7B
| $1.34M | ﹤0.01% |
12,500
+3,500
| +39% | +$400K |
|
|
TRUE
2319
PUT
DELISTED
TrueCar
TRUE
| $1.34M | ﹤0.01% |
583,000
+210,500
| +57% | +$561K |
|
|
RADI
2320
CALL
DELISTED
Radius Global Infrastructure, Inc. Class A Common Stock
RADI
| $1.34M | ﹤0.01% |
91,400
+5,400
| +6% | +$73.2K |
|
2321
Zillow
ZG
$7.02B
| $1.34M | ﹤0.01% |
30,636
+2,602
| +9% | +$108K |
|
2322
PUT
Herbalife
HLF
$1.23B
| $1.33M | ﹤0.01% |
82,800
+36,300
| +78% | +$642K |
|
2323
PUT
HF Sinclair
DINO
$15.9B
| $1.33M | ﹤0.01% |
27,500
+7,200
| +35% | +$374K |
|
2324
PUT
Innovative Industrial Properties
IIPR
$1.78B
| $1.33M | ﹤0.01% |
17,500
-24,100
| -58% | -$2.13M |
|
|
INFN
2325
CALL
DELISTED
Infinera Corporation Common Stock
INFN
| $1.33M | ﹤0.01% |
171,300
-5,200
| -3% | -$37.8K |
|
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.