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 | |
|---|---|---|---|---|---|---|
3626
United States 12 Month Oil Fund,
USL
$44.8M
| $357K | ﹤0.01% |
10,591
-142
| -1% | -$4.82K |
|
3627
T. Rowe Price
TROW
$25.5B
| $356K | ﹤0.01% |
+3,160
| New | +$361K |
|
|
TRUE
3628
DELISTED
TrueCar
TRUE
| $356K | ﹤0.01% |
155,041
+51,807
| +50% | +$138K |
|
3629
Vanguard Mid-Cap Value ETF
VOE
$23.8B
| $356K | ﹤0.01% |
2,657
-12,372
| -82% | -$1.72M |
|
|
ATSG
3630
PUT
DELISTED
Air Transport Services Group
ATSG
| $356K | ﹤0.01% |
17,100
+14,300
| +511% | +$345K |
|
|
USX
3631
CALL
DELISTED
U.S. Xpress Enterprises, Inc. Class A Common Stock
USX
| $356K | ﹤0.01% |
60,100
+52,800
| +723% | +$123K |
|
3632
CALL
Glaukos
GKOS
$8.92B
| $355K | ﹤0.01% |
7,100
+2,500
| +54% | +$121K |
|
|
SRC
3633
PUT
DELISTED
SPIRIT REALTY CAPITAL, INC.
SRC
| $354K | ﹤0.01% |
8,900
+3,800
| +75% | +$157K |
|
|
SCPL
3634
PUT
DELISTED
SciPlay Corporation Class A Common Stock
SCPL
| $354K | ﹤0.01% |
20,900
+900
| +5% | +$14.8K |
|
3635
CALL
Freshworks
FRSH
$2.99B
| $353K | ﹤0.01% |
23,000
+19,200
| +505% | +$291K |
|
3636
CALL
Saia
SAIA
$11.2B
| $353K | ﹤0.01% |
1,300
-8,000
| -86% | -$2.14M |
|
|
SII
3637
CALL
Sprott
SII
$2.7B
| $353K | ﹤0.01% |
9,700
+8,900
| +1,113% | +$333K |
|
|
RAD
3638
CALL
DELISTED
Rite Aid Corporation
RAD
| $353K | ﹤0.01% |
157,700
-45,800
| -23% | -$152K |
|
3639
CALL
Portland General Electric
POR
$5.93B
| $352K | ﹤0.01% |
7,200
+3,000
| +71% | +$143K |
|
|
WIRE
3640
PUT
DELISTED
Encore Wire Corp
WIRE
| $352K | ﹤0.01% |
1,900
-8,000
| -81% | -$1.36M |
|
3641
CALL
InfraCap MLP ETF
AMZA
$461M
| $351K | ﹤0.01% |
13,000
-1,100
| -8% | -$35.9K |
|
3642
PUT
Bread Financial
BFH
$4.29B
| $351K | ﹤0.01% |
11,600
+2,600
| +29% | +$97.4K |
|
3643
CALL
LSB Industries
LXU
$824M
| $351K | ﹤0.01% |
34,000
-36,500
| -52% | -$445K |
|
3644
CALL
Timken Company
TKR
$9.81B
| $351K | ﹤0.01% |
4,300
+1,500
| +54% | +$121K |
|
|
NVTA
3645
PUT
DELISTED
Invitae Corporation
NVTA
| $351K | ﹤0.01% |
260,700
+140,000
| +116% | +$276K |
|
3646
CALL
Bakkt Inc
BKKT
$338M
| $350K | ﹤0.01% |
8,160
-8,272
| -50% | -$322K |
|
3647
CALL
Kanzhun
BZ
$7.03B
| $350K | ﹤0.01% |
18,400
-88,800
| -83% | -$1.94M |
|
3648
CALL
Brookfield Renewable
BEPC
$5.95B
| $349K | ﹤0.01% |
10,000
+4,700
| +89% | +$142K |
|
3649
CALL
Cytek Biosciences
CTKB
$570M
| $349K | ﹤0.01% |
38,000
+6,800
| +22% | +$73.1K |
|
3650
CALL
Oshkosh
OSK
$9.66B
| $349K | ﹤0.01% |
4,200
+800
| +24% | +$72.6K |
|
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.