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 | |
|---|---|---|---|---|---|---|
2051
American International
AIG
$41.9B
| $1.79M | ﹤0.01% |
+31,166
| New | +$1.67M |
|
2052
PUT
American Eagle Outfitters
AEO
$2.85B
| $1.79M | ﹤0.01% |
151,700
+46,000
| +44% | +$574K |
|
2053
PUT
Hyatt Hotels
H
$17.6B
| $1.79M | ﹤0.01% |
15,600
-52,000
| -77% | -$5.88M |
|
2054
PUT
Baker Hughes
BKR
$56.8B
| $1.78M | ﹤0.01% |
56,500
-19,600
| -26% | -$571K |
|
|
VISN
2055
Vistance Networks Inc
VISN
$2.66B
| $1.78M | ﹤0.01% |
316,741
+240,850
| +317% | +$1.15M |
|
|
JWN
2056
DELISTED
Nordstrom
JWN
| $1.78M | ﹤0.01% |
+87,033
| New | +$1.46M |
|
2057
CALL
Invesco
IVZ
$13.3B
| $1.78M | ﹤0.01% |
105,900
+65,500
| +162% | +$1.05M |
|
2058
United Parcel Service
UPS
$97.6B
| $1.78M | ﹤0.01% |
+9,932
| New | +$1.76M |
|
2059
Annaly Capital Management
NLY
$16.9B
| $1.78M | ﹤0.01% |
+88,861
| New | +$1.73M |
|
|
PLL
2060
CALL
DELISTED
Piedmont Lithium
PLL
| $1.78M | ﹤0.01% |
30,800
+15,700
| +104% | +$898K |
|
2061
CALL
Illinois Tool Works
ITW
$81.4B
| $1.78M | ﹤0.01% |
7,100
-600
| -8% | -$141K |
|
|
ABCM
2062
PUT
DELISTED
Abcam PLC
ABCM
| $1.78M | ﹤0.01% |
72,600
+68,800
| +1,811% | +$1.19M |
|
2063
CALL
ING
ING
$93.8B
| $1.77M | ﹤0.01% |
131,800
-39,700
| -23% | -$507K |
|
2064
PUT
Nice
NICE
$5.29B
| $1.77M | ﹤0.01% |
8,600
-39,900
| -82% | -$8.23M |
|
2065
Moderna
MRNA
$21.5B
| $1.77M | ﹤0.01% |
+14,597
| New | +$1.95M |
|
2066
Xcel Energy
XEL
$51B
| $1.77M | ﹤0.01% |
+28,468
| New | +$1.9M |
|
2067
CALL
Geron
GERN
$911M
| $1.77M | ﹤0.01% |
550,200
+450,600
| +452% | +$1.28M |
|
2068
CALL
Vanguard ESG US Corporate Bond ETF
VCEB
$1.18B
| $1.76M | ﹤0.01% |
16,200
+2,100
| +15% | +$130K |
|
|
TRTN
2069
PUT
DELISTED
Triton International Limited
TRTN
| $1.76M | ﹤0.01% |
21,200
-3,700
| -15% | -$300K |
|
2070
PUT
Amylyx Pharmaceuticals
AMLX
$2.05B
| $1.76M | ﹤0.01% |
81,800
+32,600
| +66% | +$880K |
|
|
GRMN
2071
PUT
Garmin
GRMN
$46.9B
| $1.76M | ﹤0.01% |
16,900
+1,000
| +6% | +$102K |
|
2072
PUT
Cracker Barrel
CBRL
$1.2B
| $1.76M | ﹤0.01% |
18,900
+9,900
| +110% | +$1.02M |
|
|
IRBT
2073
PUT
DELISTED
iRobot
IRBT
| $1.76M | ﹤0.01% |
38,900
-27,200
| -41% | -$1.09M |
|
2074
PUT
Patrick Industries
PATK
$2.8B
| $1.76M | ﹤0.01% |
33,000
+3,000
| +10% | +$141K |
|
2075
Eos Energy Enterprises
EOSE
$1.23B
| $1.76M | ﹤0.01% |
404,883
+128,378
| +46% | +$337K |
|
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.