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 | |
|---|---|---|---|---|---|---|
4301
CALL
Aldeyra Therapeutics
ALDX
$95.3M
| $202K | ﹤0.01% |
20,400
-43,900
| -68% | -$310K |
|
4302
Direxion Daily Gold Miners Index Bear 2X ETF
DUST
$70.9M
| $202K | ﹤0.01% |
+188
| New | +$244K |
|
4303
CALL
VanEck Energy Income ETF
EINC
$77.3M
| $202K | ﹤0.01% |
26,600
+6,100
| +30% | +$378K |
|
4304
CALL
Element Solutions
ESI
$8.89B
| $202K | ﹤0.01% |
10,500
-31,800
| -75% | -$627K |
|
4305
Green Dot
GDOT
$758M
| $202K | ﹤0.01% |
11,809
+6,458
| +121% | +$113K |
|
4306
CALL
Otter Tail
OTTR
$3.93B
| $202K | ﹤0.01% |
2,800
+2,500
| +833% | +$166K |
|
|
PMT
4307
PUT
PennyMac Mortgage Investment
PMT
$854M
| $202K | ﹤0.01% |
16,400
+13,800
| +531% | +$186K |
|
4308
PUT
Prospect Capital
PSEC
$1.12B
| $202K | ﹤0.01% |
29,100
-10,600
| -27% | -$77K |
|
|
AIFU
4309
CALL
AIFU Inc
AIFU
$190M
| $202K | ﹤0.01% |
58
-3
| -5% | -$9.32K |
|
4310
PUT
BRC Inc
BRCC
$118M
| $201K | ﹤0.01% |
39,200
-30,500
| -44% | -$191K |
|
4311
CALL
Evolent Health
EVH
$421M
| $201K | ﹤0.01% |
6,200
+5,600
| +933% | +$177K |
|
4312
CALL
Hudbay
HBM
$9.67B
| $201K | ﹤0.01% |
38,300
-36,800
| -49% | -$194K |
|
4313
PUT
Warrior Met Coal
HCC
$4.17B
| $201K | ﹤0.01% |
5,500
-6,400
| -54% | -$237K |
|
4314
Toast
TOST
$18.8B
| $201K | ﹤0.01% |
+11,366
| New | +$224K |
|
4315
CALL
Popular Inc
BPOP
$11.1B
| $200K | ﹤0.01% |
3,500
-3,200
| -48% | -$208K |
|
4316
CALL
Evolution Petroleum
EPM
$131M
| $200K | ﹤0.01% |
31,800
+17,300
| +119% | +$111K |
|
|
MESO
4317
Mesoblast
MESO
$1.87B
| $200K | ﹤0.01% |
30,472
+1,848
| +6% | +$12.2K |
|
4318
Vanguard Russell 1000 Growth ETF
VONG
$42.1B
| $200K | ﹤0.01% |
3,188
+2,882
| +942% | +$171K |
|
4319
PUT
AES
AES
$10.6B
| $199K | ﹤0.01% |
8,300
-25,200
| -75% | -$640K |
|
4320
CALL
Alpha Pro Tech
APT
$51.1M
| $199K | ﹤0.01% |
47,900
-39,200
| -45% | -$163K |
|
4321
PUT
CVR Energy
CVI
$3.39B
| $199K | ﹤0.01% |
6,100
+2,900
| +91% | +$93K |
|
4322
Fidelity National Financial
FNF
$14.6B
| $199K | ﹤0.01% |
+5,708
| New | +$225K |
|
4323
ImmunityBio
IBRX
$7.3B
| $199K | ﹤0.01% |
109,766
+107,776
| +5,416% | +$335K |
|
|
RC
4324
PUT
Ready Capital
RC
$261M
| $199K | ﹤0.01% |
19,600
-24,000
| -55% | -$281K |
|
4325
PUT
Arrowhead Research
ARWR
$12.1B
| $198K | ﹤0.01% |
7,800
-24,500
| -76% | -$771K |
|
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.