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 | |
|---|---|---|---|---|---|---|
5276
Hormel Foods
HRL
$14B
| $89K | ﹤0.01% |
+2,248
| New | +$97.1K |
|
5277
Liberty Energy
LBRT
$2.93B
| $89K | ﹤0.01% |
+7,006
| New | +$104K |
|
5278
Paymentus
PAY
$4.39B
| $89K | ﹤0.01% |
10,090
-14,939
| -60% | -$126K |
|
5279
PUT
Vaxcyte
PCVX
$8.08B
| $89K | ﹤0.01% |
2,400
-41,000
| -94% | -$1.74M |
|
5280
CALL
The RealReal
REAL
$1.44B
| $89K | ﹤0.01% |
71,200
-37,000
| -34% | -$53.7K |
|
5281
PUT
Rexford Industrial Realty
REXR
$8.56B
| $89K | ﹤0.01% |
1,500
| – | – |
|
5282
CALL
Sunstone Hotel Investors
SHO
$2.18B
| $89K | ﹤0.01% |
9,100
+5,900
| +184% | +$59.9K |
|
|
SOL
5283
PUT
DELISTED
Emeren Group
SOL
| $89K | ﹤0.01% |
20,200
+500
| +3% | +$2.35K |
|
5284
PUT
BlackRock TCP Capital
TCPC
$273M
| $89K | ﹤0.01% |
8,700
+7,400
| +569% | +$89.5K |
|
5285
CALL
Telus
TU
$16.8B
| $89K | ﹤0.01% |
4,500
-4,600
| -51% | -$93.5K |
|
|
NVTA
5286
DELISTED
Invitae Corporation
NVTA
| $89K | ﹤0.01% |
66,115
+27,765
| +72% | +$54.7K |
|
5287
PUT
BGC Group
BGC
$5.6B
| $88K | ﹤0.01% |
16,900
+8,400
| +99% | +$38.5K |
|
|
DAO
5288
PUT
Youdao
DAO
$1.97B
| $88K | ﹤0.01% |
+10,400
| New | +$82.4K |
|
5289
CALL
Goosehead Insurance
GSHD
$2.27B
| $88K | ﹤0.01% |
+1,700
| New | +$73.8K |
|
5290
PUT
Hexcel
HXL
$7.78B
| $88K | ﹤0.01% |
+1,300
| New | +$88.2K |
|
5291
PUT
Immunovant
IMVT
$8.11B
| $88K | ﹤0.01% |
5,700
+5,000
| +714% | +$86.8K |
|
5292
CALL
Janus International
JBI
$694M
| $88K | ﹤0.01% |
9,000
+5,700
| +173% | +$59.4K |
|
5293
Precigen
PGEN
$2.12B
| $88K | ﹤0.01% |
83,520
+15,289
| +22% | +$22K |
|
5294
LiveRamp
RAMP
$2.3B
| $88K | ﹤0.01% |
4,014
-346
| -8% | -$8.25K |
|
|
CD
5295
PUT
DELISTED
Chindata Group Holdings Limited American Depositary Shares
CD
| $88K | ﹤0.01% |
12,700
+11,300
| +807% | +$86.5K |
|
|
SPPI
5296
CALL
DELISTED
Spectrum Pharmaceuticals Inc
SPPI
| $88K | ﹤0.01% |
118,100
-34,300
| -23% | -$25K |
|
|
AKYA
5297
PUT
DELISTED
Akoya BioSciences
AKYA
| $87K | ﹤0.01% |
+10,700
| New | +$112K |
|
5298
CALL
AerSale
ASLE
$291M
| $87K | ﹤0.01% |
5,100
-5,700
| -53% | -$101K |
|
5299
CALL
Brookfield Infrastructure Partners
BIP
$19.5B
| $87K | ﹤0.01% |
2,600
-2,000
| -43% | -$67.4K |
|
|
BPT
5300
CALL
DELISTED
BP Prudhoe Bay Royalty Trust
BPT
| $87K | ﹤0.01% |
11,500
-13,800
| -55% | -$147K |
|
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.