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 | |
|---|---|---|---|---|---|---|
2926
nCino
NCNO
$1.94B
| $721K | ﹤0.01% |
23,957
+22,940
| +2,256% | +$584K |
|
2927
PUT
Algoma Steel
ASTL
$463M
| $720K | ﹤0.01% |
101,500
+62,900
| +163% | +$467K |
|
2928
CALL
Ubiquiti
UI
$32.4B
| $720K | ﹤0.01% |
4,100
+3,900
| +1,950% | +$787K |
|
2929
CALL
Yelp
YELP
$1.46B
| $720K | ﹤0.01% |
19,800
+15,400
| +350% | +$497K |
|
2930
PUT
Cipher Digital
CIFR
$8.71B
| $719K | ﹤0.01% |
251,400
+207,900
| +478% | +$512K |
|
2931
CALL
Penske Automotive Group
PAG
$14.2B
| $716K | ﹤0.01% |
4,300
-13,000
| -75% | -$1.89M |
|
2932
CALL
RLX Technology
RLX
$2.48B
| $716K | ﹤0.01% |
405,000
-483,500
| -54% | -$1.08M |
|
2933
PUT
Rayonier Advanced Materials
RYAM
$581M
| $716K | ﹤0.01% |
167,400
+80,700
| +93% | +$382K |
|
2934
PUT
AeroVironment
AVAV
$7.85B
| $715K | ﹤0.01% |
7,000
-5,400
| -44% | -$544K |
|
2935
PUT
Amplify Energy
AMPY
$156M
| $714K | ﹤0.01% |
105,600
+2,100
| +2% | +$14.6K |
|
|
MRSH
2936
CALL
Marsh
MRSH
$87.6B
| $714K | ﹤0.01% |
3,800
-16,000
| -81% | -$2.84M |
|
2937
SM Energy
SM
$7.32B
| $714K | ﹤0.01% |
22,584
+20,589
| +1,032% | +$582K |
|
2938
CALL
Nordic American Tanker
NAT
$1.37B
| $711K | ﹤0.01% |
193,800
+37,100
| +24% | +$134K |
|
2939
PUT
Organon & Co
OGN
$3.55B
| $711K | ﹤0.01% |
34,200
-112,900
| -77% | -$2.45M |
|
|
PGTI
2940
CALL
DELISTED
PGT, Inc.
PGTI
| $711K | ﹤0.01% |
24,400
+19,100
| +360% | +$503K |
|
2941
Humana
HUM
$46.1B
| $710K | ﹤0.01% |
1,589
-2,747
| -63% | -$1.38M |
|
2942
PUT
Urban Outfitters
URBN
$6.22B
| $708K | ﹤0.01% |
21,400
+5,200
| +32% | +$152K |
|
|
BERY
2943
PUT
DELISTED
Berry Global Group, Inc.
BERY
| $707K | ﹤0.01% |
11,979
+10,563
| +746% | +$577K |
|
2944
PUT
Tanger
SKT
$4.81B
| $706K | ﹤0.01% |
32,000
+25,000
| +357% | +$501K |
|
2945
CALL
Willis Towers Watson
WTW
$28.6B
| $706K | ﹤0.01% |
3,000
-6,100
| -67% | -$1.41M |
|
|
WIRE
2946
CALL
DELISTED
Encore Wire Corp
WIRE
| $706K | ﹤0.01% |
3,800
+1,200
| +46% | +$203K |
|
2947
Xtrackers Harvest CSI 300 China A-Shares ETF
ASHR
$1.57B
| $704K | ﹤0.01% |
+26,326
| New | +$744K |
|
2948
Applied Optoelectronics
AAOI
$7.83B
| $701K | ﹤0.01% |
117,732
+85,864
| +269% | +$225K |
|
2949
PUT
Compañía de Minas Buenaventura
BVN
$8.02B
| $701K | ﹤0.01% |
+95,500
| New | +$704K |
|
2950
CALL
Energizer
ENR
$1.45B
| $701K | ﹤0.01% |
20,900
-16,800
| -45% | -$561K |
|
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.