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 | |
|---|---|---|---|---|---|---|
|
SFBS
5626
CALL
ServisFirst Bancshares
SFBS
$4.89B
| $65K | ﹤0.01% |
+1,200
| New | +$80.4K |
|
5627
PUT
Summit Therapeutics
SMMT
$10.4B
| $65K | ﹤0.01% |
37,500
-2,700
| -7% | -$7.36K |
|
5628
Sixth Street Specialty
TSLX
$1.63B
| $65K | ﹤0.01% |
+3,578
| New | +$66.4K |
|
5629
Vontier
VNT
$4.52B
| $65K | ﹤0.01% |
2,387
+2,273
| +1,994% | +$54.9K |
|
5630
CALL
VOC Energy
VOC
$50.7M
| $65K | ﹤0.01% |
7,900
-6,800
| -46% | -$61.7K |
|
5631
PUT
Verrica Pharmaceuticals
VRCA
$89.7M
| $65K | ﹤0.01% |
1,010
-100
| -9% | -$6.05K |
|
5632
PUT
Cactus
WHD
$5.21B
| $65K | ﹤0.01% |
1,600
-10,800
| -87% | -$522K |
|
5633
CALL
Allegion
ALLE
$13.4B
| $64K | ﹤0.01% |
600
+200
| +50% | +$22.4K |
|
5634
CALL
Designer Brands
DBI
$307M
| $64K | ﹤0.01% |
7,400
-18,200
| -71% | -$175K |
|
5635
Floor & Decor
FND
$6.13B
| $64K | ﹤0.01% |
659
-5,973
| -90% | -$537K |
|
|
HOUS
5636
DELISTED
Anywhere Real Estate
HOUS
| $64K | ﹤0.01% |
12,304
+10,130
| +466% | +$69K |
|
5637
Harrow
HROW
$1.45B
| $64K | ﹤0.01% |
+3,068
| New | +$52.3K |
|
5638
CALL
Renaissance International IPO ETF
IPOS
$11.2M
| $64K | ﹤0.01% |
2,200
+700
| +47% | +$12K |
|
5639
LivaNova
LIVN
$4.4B
| $64K | ﹤0.01% |
1,491
-13,812
| -90% | -$699K |
|
5640
iShares Global Materials ETF
MXI
$338M
| $64K | ﹤0.01% |
772
+279
| +57% | +$23.2K |
|
5641
PUT
Bank of N.T. Butterfield & Son
NTB
$2.43B
| $64K | ﹤0.01% |
+2,400
| New | +$76.6K |
|
|
STKL
5642
CALL
DELISTED
SunOpta
STKL
| $64K | ﹤0.01% |
8,400
-2,400
| -22% | -$19.2K |
|
5643
PUT
Tootsie Roll Industries
TR
$2.93B
| $64K | ﹤0.01% |
1,576
+225
| +17% | +$8.97K |
|
5644
PUT
UFP Technologies
UFPT
$1.97B
| $64K | ﹤0.01% |
+500
| New | +$58.1K |
|
|
CVM.WS
5645
CALL
DELISTED
Cel-Sci Corp Series S
CVM.WS
| $64K | ﹤0.01% |
27,800
+5,400
| +24% | +$12.4K |
|
|
CKPT
5646
CALL
DELISTED
Checkpoint Therapeutics
CKPT
| $63K | ﹤0.01% |
28,100
+5,200
| +23% | +$26.1K |
|
|
CRESY
5647
CALL
Cresud
CRESY
$795M
| $63K | ﹤0.01% |
10,408
+8,639
| +488% | +$56.6K |
|
|
CTO
5648
PUT
CTO Realty Growth
CTO
$824M
| $63K | ﹤0.01% |
3,700
+1,200
| +48% | +$21.7K |
|
5649
PUT
Emergent Biosolutions
EBS
$373M
| $63K | ﹤0.01% |
6,100
+5,000
| +455% | +$60.4K |
|
5650
CALL
Vertical Aerospace
EVTL
$158M
| $63K | ﹤0.01% |
2,990
-12,400
| -81% | -$259K |
|
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.