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 | |
|---|---|---|---|---|---|---|
5376
Graco
GGG
$12.8B
| $82K | ﹤0.01% |
1,130
+1,081
| +2,206% | +$75.1K |
|
5377
CALL
Monte Rosa Therapeutics
GLUE
$1.34B
| $82K | ﹤0.01% |
10,600
| – | – |
|
|
GPMT
5378
Granite Point Mortgage Trust
GPMT
$64.2M
| $82K | ﹤0.01% |
16,693
-2,494
| -13% | -$14.5K |
|
5379
PUT
ICU Medical
ICUI
$4.18B
| $82K | ﹤0.01% |
+500
| New | +$86K |
|
|
JBGS
5380
CALL
JBG SMITH
JBGS
$825M
| $82K | ﹤0.01% |
5,500
+4,500
| +450% | +$79.8K |
|
5381
PUT
Root
ROOT
$852M
| $82K | ﹤0.01% |
18,300
-50,900
| -74% | -$258K |
|
5382
PUT
SGHC Ltd
SGHC
$7.08B
| $82K | ﹤0.01% |
20,400
+15,800
| +343% | +$57.1K |
|
5383
CALL
VolitionRx Ltd
VNRX
$8.88M
| $82K | ﹤0.01% |
2,150
+1,375
| +177% | +$57.5K |
|
5384
PUT
Webster Financial
WBS
$12.5B
| $82K | ﹤0.01% |
2,100
-6,900
| -77% | -$331K |
|
5385
Wrap Technologies
WRAP
$99.2M
| $82K | ﹤0.01% |
47,925
-16,044
| -25% | -$33.2K |
|
5386
Wave Life Sciences
WVE
$1.09B
| $82K | ﹤0.01% |
19,102
+18,477
| +2,956% | +$84.7K |
|
5387
PUT
Brookfield Renewable
BEP
$9.9B
| $81K | ﹤0.01% |
2,600
-15,700
| -86% | -$443K |
|
5388
CALL
BlueLinx
BXC
$408M
| $81K | ﹤0.01% |
1,200
-5,200
| -81% | -$421K |
|
5389
Focus Universal
FCUV
$9.37M
| $81K | ﹤0.01% |
82
+77
| +1,540% | +$111K |
|
5390
CALL
Flowserve
FLS
$9.6B
| $81K | ﹤0.01% |
2,400
-1,600
| -40% | -$53.6K |
|
|
XRN
5391
CALL
Chiron Real Estate Inc
XRN
$514M
| $81K | ﹤0.01% |
1,780
-2,160
| -55% | -$109K |
|
5392
PUT
Globalstar
GSAT
$10.6B
| $81K | ﹤0.01% |
4,680
+53
| +1% | +$977 |
|
|
HEPA
5393
CALL
DELISTED
Hepion Pharmaceuticals
HEPA
| $81K | ﹤0.01% |
105
+24
| +30% | +$17.7K |
|
5394
Hyliion Holdings
HYLN
$635M
| $81K | ﹤0.01% |
40,947
+16,715
| +69% | +$46.5K |
|
5395
CALL
loanDepot
LDI
$528M
| $81K | ﹤0.01% |
+50,900
| New | +$107K |
|
5396
CALL
Mirum Pharmaceuticals
MIRM
$6.57B
| $81K | ﹤0.01% |
3,400
+3,300
| +3,300% | +$75.2K |
|
5397
State Street SPDR Portfolio TIPS ETF
SPIP
$1B
| $81K | ﹤0.01% |
3,070
+1,390
| +83% | +$36.4K |
|
|
STR
5398
CALL
DELISTED
Sitio Royalties
STR
| $81K | ﹤0.01% |
3,600
-9,300
| -72% | -$231K |
|
5399
Cambria Tail Risk ETF
TAIL
$147M
| $81K | ﹤0.01% |
5,534
-2,956
| -35% | -$44.1K |
|
|
UBX
5400
CALL
DELISTED
Unity Biotechnology
UBX
| $81K | ﹤0.01% |
49,700
-516,600
| -91% | -$2.07M |
|
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.