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 |
Microsoft
MSFT
|
+$53.9M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$52.9M |
| 3 |
NVIDIA
NVDA
|
+$47.1M |
| 4 |
PayPal
PYPL
|
+$41.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$28.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$51.4M |
| 2 |
Walmart Inc
WMT
|
+$46.4M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 4 |
Adobe
ADBE
|
+$33.5M |
| 5 |
Starbucks
SBUX
|
+$26.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Healthcare | 0.21% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Communication Services | 0.2% |
| 5 | Financials | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2976
PUT
Playtika
PLTK
$1.48B
| $687K | ﹤0.01% |
59,300
+43,000
| +264% | +$466K |
|
2977
PUT
EVgo
EVGO
$220M
| $685K | ﹤0.01% |
171,400
+17,500
| +11% | +$89.3K |
|
2978
PUT
Frontline
FRO
$8.59B
| $685K | ﹤0.01% |
47,200
-7,000
| -13% | -$105K |
|
2979
PUT
SoundHound AI
SOUN
$2.79B
| $685K | ﹤0.01% |
150,600
+91,800
| +156% | +$273K |
|
2980
PUT
Service Corp International
SCI
$11.4B
| $684K | ﹤0.01% |
10,600
+9,100
| +607% | +$608K |
|
2981
InMode
INMD
$884M
| $683K | ﹤0.01% |
18,296
-16,125
| -47% | -$563K |
|
2982
PUT
RCI Hospitality Holdings
RICK
$201M
| $683K | ﹤0.01% |
9,000
-2,700
| -23% | -$203K |
|
2983
PUT
Vertiv
VRT
$110B
| $683K | ﹤0.01% |
27,600
-122,700
| -82% | -$2.11M |
|
2984
Zillow
ZG
$7.32B
| $682K | ﹤0.01% |
13,880
-16,756
| -55% | -$756K |
|
2985
MDU Resources
MDU
$4.37B
| $681K | ﹤0.01% |
+58,767
| New | +$661K |
|
2986
PUT
Krystal Biotech
KRYS
$10.4B
| $680K | ﹤0.01% |
5,800
-9,500
| -62% | -$970K |
|
2987
PUT
RUM Group Inc
RUM
$1.67B
| $680K | ﹤0.01% |
76,300
+34,400
| +82% | +$324K |
|
|
VSTO
2988
CALL
DELISTED
Vista Outdoor Inc.
VSTO
| $680K | ﹤0.01% |
24,600
+7,900
| +47% | +$214K |
|
2989
Allison Transmission
ALSN
$10.1B
| $679K | ﹤0.01% |
+12,041
| New | +$592K |
|
2990
CALL
Dover
DOV
$27.7B
| $679K | ﹤0.01% |
4,600
-7,100
| -61% | -$1.01M |
|
2991
PUT
Galicia Financial Group
GGAL
$8.03B
| $679K | ﹤0.01% |
39,500
-13,100
| -25% | -$171K |
|
2992
PUT
Ambev
ABEV
$47.4B
| $678K | ﹤0.01% |
213,500
-110,300
| -34% | -$324K |
|
2993
Ally Financial
ALLY
$13.3B
| $678K | ﹤0.01% |
25,106
-1,848
| -7% | -$49.1K |
|
2994
CALL
American States Water
AWR
$3.37B
| $678K | ﹤0.01% |
7,800
+7,500
| +2,500% | +$671K |
|
2995
Jabil
JBL
$32.6B
| $678K | ﹤0.01% |
6,284
-17,950
| -74% | -$1.58M |
|
|
AKTS
2996
DELISTED
Akoustis Technologies Inc
AKTS
| $678K | ﹤0.01% |
213,299
-30,582
| -13% | -$93.8K |
|
2997
CALL
Essential Properties Realty Trust
EPRT
$6.9B
| $677K | ﹤0.01% |
28,800
+10,600
| +58% | +$258K |
|
2998
CALL
Genworth Financial
GNW
$3.79B
| $676K | ﹤0.01% |
135,300
-4,800
| -3% | -$26.3K |
|
2999
CALL
Robert Half
RHI
$4.07B
| $676K | ﹤0.01% |
9,000
+2,700
| +43% | +$193K |
|
3000
CALL
Brunswick
BC
$5.24B
| $675K | ﹤0.01% |
7,800
+5,800
| +290% | +$473K |
|
Similar funds
Simplex Trading's Q2 2023 Portfolio in Review
As of Q2 2023, Simplex Trading held 10,535 positions worth $122B, up 6.9% from $114B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q2 2023 filing shows 1,474 new, 3,350 increased, 3,913 reduced and 1,517 closed positions. Its largest new stake was Microsoft: 171,935 shares worth $58.5M. The largest sale was Apple, an estimated $51.4M.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.42% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q2 2023 buy was Microsoft: 171,935 shares worth $58.5M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q2 2023, an estimated $52.9M increase.
- Simplex Trading's biggest Q2 2023 reduction was Adobe, cutting an estimated $33.5M.
- Simplex Trading fully exited Apple in Q2 2023, selling an estimated $51.4M.
- Simplex Trading's ten largest holdings make up 43% of its $122B portfolio in Q2 2023.
- Simplex Trading opened 1,474 new positions and closed 1,517 in Q2 2023.
- Simplex Trading's portfolio value rose 6.9% quarter-over-quarter to $122B.
Based on Simplex Trading's 13F filing for Q2 2023, filed 4 Aug 2023.