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 | |
|---|---|---|---|---|---|---|
2801
CALL
Sunoco
SUN
$14.2B
| $798K | ﹤0.01% |
18,200
+10,800
| +146% | +$487K |
|
2802
PUT
Target Hospitality
TH
$1.61B
| $798K | ﹤0.01% |
60,800
-30,700
| -34% | -$491K |
|
|
JMIA
2803
Jumia Technologies
JMIA
$726M
| $797K | ﹤0.01% |
242,541
+211,703
| +687% | +$762K |
|
2804
CALL
Crane NXT
CXT
$3.04B
| $794K | ﹤0.01% |
20,153
-4,319
| -18% | -$171K |
|
2805
CALL
Epsilon Energy
EPSN
$176M
| $794K | ﹤0.01% |
148,700
+148,200
| +29,640% | +$844K |
|
|
SPR
2806
DELISTED
Spirit AeroSystems
SPR
| $793K | ﹤0.01% |
22,971
-54,518
| -70% | -$1.83M |
|
2807
CALL
Nabors Industries
NBR
$1.23B
| $792K | ﹤0.01% |
6,500
+5,000
| +333% | +$757K |
|
|
PDS
2808
CALL
Precision Drilling
PDS
$1.09B
| $791K | ﹤0.01% |
15,400
+13,100
| +570% | +$848K |
|
2809
CALL
Ameris Bancorp
ABCB
$5.89B
| $790K | ﹤0.01% |
21,600
+20,500
| +1,864% | +$922K |
|
2810
PUT
IMAX
IMAX
$2.38B
| $790K | ﹤0.01% |
41,200
-18,100
| -31% | -$312K |
|
|
NEWR
2811
CALL
DELISTED
New Relic, Inc.
NEWR
| $790K | ﹤0.01% |
10,500
-16,100
| -61% | -$1.09M |
|
|
MAG
2812
PUT
DELISTED
MAG Silver
MAG
| $789K | ﹤0.01% |
62,300
+55,300
| +790% | +$741K |
|
2813
PUT
Rogers Communications
RCI
$17.7B
| $788K | ﹤0.01% |
17,000
+8,100
| +91% | +$384K |
|
2814
PUT
STAG Industrial
STAG
$7.86B
| $788K | ﹤0.01% |
23,300
+15,900
| +215% | +$542K |
|
2815
CALL
Phreesia
PHR
$632M
| $787K | ﹤0.01% |
24,400
+21,700
| +804% | +$764K |
|
2816
CALL
PureCycle Technologies
PCT
$1.17B
| $786K | ﹤0.01% |
112,400
-128,000
| -53% | -$892K |
|
2817
PUT
Establishment Labs
ESTA
$2.72B
| $785K | ﹤0.01% |
11,600
-1,400
| -11% | -$96K |
|
2818
CALL
FuboTV Inc
FUBO
$245M
| $784K | ﹤0.01% |
54,008
-109,784
| -67% | -$2.51M |
|
2819
CALL
Host Hotels & Resorts
HST
$16.8B
| $784K | ﹤0.01% |
47,600
-2,900
| -6% | -$49.4K |
|
|
ICPT
2820
CALL
DELISTED
Intercept Pharmaceuticals, Inc.
ICPT
| $784K | ﹤0.01% |
58,400
+22,600
| +63% | +$391K |
|
2821
Deutsche Bank
DB
$66.3B
| $783K | ﹤0.01% |
76,750
-52,898
| -41% | -$633K |
|
2822
CALL
Arrowhead Research
ARWR
$12.1B
| $782K | ﹤0.01% |
30,800
+300
| +1% | +$9.44K |
|
2823
PUT
Manulife Financial
MFC
$72.6B
| $782K | ﹤0.01% |
42,600
+3,200
| +8% | +$60.9K |
|
2824
PUT
MillerKnoll
MLKN
$1.5B
| $781K | ﹤0.01% |
38,200
+7,700
| +25% | +$173K |
|
2825
PUT
Penumbra
PEN
$12.5B
| $780K | ﹤0.01% |
2,800
+1,600
| +133% | +$408K |
|
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.