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 | |
|---|---|---|---|---|---|---|
8776
Veru
VERU
$36.1M
| $1K | ﹤0.01% |
170
-7,092
| -98% | -$287K |
|
8777
CALL
Verastem
VSTM
$532M
| $1K | ﹤0.01% |
225
-1,483
| -87% | -$9.39K |
|
8778
VistaGen Therapeutics
VTGN
$9.29M
| $1K | ﹤0.01% |
490
-903
| -65% | -$4.74K |
|
8779
Bristow Group
VTOL
$1.35B
| $1K | ﹤0.01% |
89
+13
| +17% | +$345 |
|
8780
CALL
VirTra
VTSI
$35.9M
| $1K | ﹤0.01% |
+400
| New | +$1.8K |
|
8781
Direxion Daily Consumer Discretionary Bull 3X ETF
WANT
$13.7M
| $1K | ﹤0.01% |
69
-1,825
| -96% | -$38.8K |
|
|
WBX
8782
CALL
Wallbox
WBX
$95.3M
| $1K | ﹤0.01% |
+15
| New | +$1.5K |
|
8783
Workhorse Group
WKHS
$29.5M
| – | – |
0
| – | – |
|
8784
John Wiley & Sons Class A
WLY
$2.52B
| $1K | ﹤0.01% |
30
+23
| +329% | +$980 |
|
|
WOW
8785
CALL
DELISTED
WideOpenWest
WOW
| $1K | ﹤0.01% |
100
-135,800
| -100% | -$1.47M |
|
8786
CALL
Wave Life Sciences
WVE
$1.12B
| $1K | ﹤0.01% |
400
-16,800
| -98% | -$77K |
|
8787
PUT
Westwater Resources
WWR
$51M
| $1K | ﹤0.01% |
1,300
-200
| -13% | -$208 |
|
8788
PUT
cbdMD
YCBD
$5.65M
| $1K | ﹤0.01% |
2
-11
| -85% | -$1.02K |
|
8789
Ziff Davis
ZD
$1.9B
| $1K | ﹤0.01% |
+13
| New | +$1.07K |
|
8790
Zedge
ZDGE
$38.9M
| $1K | ﹤0.01% |
+880
| New | +$2.14K |
|
8791
CALL
Zevia
ZVIA
$108M
| $1K | ﹤0.01% |
500
-9,500
| -95% | -$38.3K |
|
|
8792
Zevia
ZVIA
$108M
| $1K | ﹤0.01% |
+362
| New | +$1.46K |
|
8793
Arq
ARQ
$86.9M
| $1K | ﹤0.01% |
722
-1,338
| -65% | -$3.63K |
|
8794
PUT
Metallus
MTUS
$873M
| $1K | ﹤0.01% |
100
-100
| -50% | -$1.87K |
|
8795
Q32 Bio
QTTB
$450M
| $1K | ﹤0.01% |
90
-730
| -89% | -$18.2K |
|
|
8796
PUT
Q32 Bio
QTTB
$450M
| $1K | ﹤0.01% |
56
-633
| -92% | -$15.8K |
|
8797
CALL
Traws Pharma
TRAW
$7.43M
| $1K | ﹤0.01% |
+72
| New | +$1.56K |
|
|
TXNM
8798
TXNM Energy Inc
TXNM
$6.47B
| $1K | ﹤0.01% |
29
| – | – |
|
|
ARTY
8799
iShares Future AI & Tech ETF
ARTY
$3.49B
| $1K | ﹤0.01% |
+32
| New | +$945 |
|
|
QNTM
8800
PUT
Quantum Biopharma Class B Subordinate Voting Shares
QNTM
$19.1M
| $1K | ﹤0.01% |
18
-16
| -47% | -$1.37K |
|
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.