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 | |
|---|---|---|---|---|---|---|
|
EVA
3551
CALL
DELISTED
Enviva Inc.
EVA
| $384K | ﹤0.01% |
13,300
-2,200
| -14% | -$89.8K |
|
3552
CALL
Algonquin Power & Utilities
AQN
$4.63B
| $382K | ﹤0.01% |
45,500
+18,900
| +71% | +$142K |
|
3553
CALL
WisdomTree US Total Dividend Fund
DTD
$1.65B
| $382K | ﹤0.01% |
11,800
+800
| +7% | +$48.9K |
|
3554
PUT
Pembina Pipeline
PBA
$29B
| $382K | ﹤0.01% |
11,800
+500
| +4% | +$16.9K |
|
3555
PUT
Cavco Industries
CVCO
$4.46B
| $381K | ﹤0.01% |
1,200
| – | – |
|
3556
CALL
Ero Copper
ERO
$2.73B
| $381K | ﹤0.01% |
21,600
+17,500
| +427% | +$282K |
|
3557
PUT
Magnolia Oil & Gas
MGY
$5.69B
| $380K | ﹤0.01% |
17,400
-23,800
| -58% | -$528K |
|
|
BTWN
3558
CALL
DELISTED
Bridgetown Holdings Limited Class A Ordinary Shares
BTWN
| $380K | ﹤0.01% |
37,800
-16,900
| -31% | -$169K |
|
3559
Matador Resources
MTDR
$5.86B
| $379K | ﹤0.01% |
+7,974
| New | +$448K |
|
3560
CALL
SSR Mining
SSRM
$5.45B
| $379K | ﹤0.01% |
25,100
-9,000
| -26% | -$137K |
|
|
CHS
3561
CALL
DELISTED
Chicos FAS, Inc.
CHS
| $379K | ﹤0.01% |
69,000
-20,700
| -23% | -$110K |
|
3562
CALL
Flux Power
FLUX
$13.4M
| $378K | ﹤0.01% |
77,800
+41,300
| +113% | +$230K |
|
3563
CALL
Herbalife
HLF
$1.26B
| $378K | ﹤0.01% |
23,500
+13,900
| +145% | +$246K |
|
3564
PubMatic
PUBM
$594M
| $378K | ﹤0.01% |
27,382
-5,461
| -17% | -$78.9K |
|
3565
CALL
Revolve Group
RVLV
$1.84B
| $378K | ﹤0.01% |
14,400
-28,200
| -66% | -$728K |
|
3566
CALL
Globant
GLOB
$1.41B
| $377K | ﹤0.01% |
2,300
+1,100
| +92% | +$180K |
|
3567
PUT
Sprout Social
SPT
$500M
| $377K | ﹤0.01% |
6,200
-7,000
| -53% | -$429K |
|
3568
CALL
System1
SST
$15.7M
| $377K | ﹤0.01% |
8,770
+2,760
| +46% | +$122K |
|
3569
PUT
Fox Factory Holding Corp
FOXF
$779M
| $376K | ﹤0.01% |
3,100
+1,800
| +138% | +$207K |
|
3570
iShares Russell 1000 Growth ETF
IWF
$120B
| $376K | ﹤0.01% |
6,164
-17,912
| -74% | -$1.03M |
|
3571
CALL
SFL Corp
SFL
$1.59B
| $376K | ﹤0.01% |
39,600
-41,600
| -51% | -$411K |
|
|
TTCF
3572
CALL
DELISTED
Tattooed Chef, Inc Class A Common Stock
TTCF
| $376K | ﹤0.01% |
264,800
-9,200
| -3% | -$12.6K |
|
|
DEN
3573
DELISTED
Denbury Inc.
DEN
| $374K | ﹤0.01% |
4,279
-3,460
| -45% | -$291K |
|
|
HIMX
3574
PUT
Himax Technologies
HIMX
$2.22B
| $373K | ﹤0.01% |
46,000
-105,500
| -70% | -$815K |
|
3575
CALL
Primoris Services
PRIM
$4.64B
| $372K | ﹤0.01% |
15,100
+11,300
| +297% | +$286K |
|
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.