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 | |
|---|---|---|---|---|---|---|
|
AMAM
2776
PUT
DELISTED
Ambrx Biopharma Inc
AMAM
| $834K | ﹤0.01% |
50,700
+9,700
| +24% | +$122K |
|
2777
PUT
Ferguson
FERG
$45B
| $833K | ﹤0.01% |
5,300
-700
| -12% | -$99.7K |
|
2778
CALL
FuboTV Inc
FUBO
$257M
| $833K | ﹤0.01% |
33,383
-20,625
| -38% | -$395K |
|
2779
iShares MSCI India ETF
INDA
$6.74B
| $832K | ﹤0.01% |
19,048
-7,476
| -28% | -$310K |
|
|
HUT
2780
PUT
Hut 8
HUT
$11.5B
| $831K | ﹤0.01% |
50,380
-16,520
| -25% | -$169K |
|
|
MORF
2781
PUT
DELISTED
Morphic Holding, Inc. Common Stock
MORF
| $831K | ﹤0.01% |
14,500
+13,300
| +1,108% | +$695K |
|
|
SRC
2782
CALL
DELISTED
SPIRIT REALTY CAPITAL, INC.
SRC
| $830K | ﹤0.01% |
21,100
-1,800
| -8% | -$69.8K |
|
2783
CALL
Waters Corp
WAT
$36.5B
| $826K | ﹤0.01% |
+3,100
| New | +$863K |
|
2784
CALL
Icon
ICLR
$12.9B
| $825K | ﹤0.01% |
3,300
+200
| +6% | +$42.5K |
|
2785
CALL
Calumet Specialty Products
CLMT
$3.53B
| $824K | ﹤0.01% |
52,000
-124,600
| -71% | -$2.05M |
|
2786
PUT
inTEST
INTT
$165M
| $824K | ﹤0.01% |
31,400
+28,400
| +947% | +$626K |
|
2787
PUT
Prosperity Bancshares
PB
$8.77B
| $824K | ﹤0.01% |
14,600
-23,700
| -62% | -$1.42M |
|
|
DAY
2788
PUT
DELISTED
Dayforce
DAY
| $823K | ﹤0.01% |
12,300
-48,200
| -80% | -$3.1M |
|
2789
AGNC Investment
AGNC
$12.4B
| $822K | ﹤0.01% |
81,157
-238,020
| -75% | -$2.31M |
|
2790
Sony
SONY
$131B
| $822K | ﹤0.01% |
+45,695
| New | +$857K |
|
2791
CALL
UWM Holdings
UWMC
$621M
| $821K | ﹤0.01% |
146,700
-98,400
| -40% | -$530K |
|
2792
PUT
Eagle Materials
EXP
$6.65B
| $820K | ﹤0.01% |
4,400
-3,400
| -44% | -$542K |
|
2793
Royalty Pharma
RPRX
$26.2B
| $820K | ﹤0.01% |
+26,696
| New | +$904K |
|
2794
CALL
Lear
LEA
$7.18B
| $818K | ﹤0.01% |
5,700
+3,200
| +128% | +$422K |
|
2795
Deutsche Bank
DB
$67.4B
| $815K | ﹤0.01% |
77,477
+727
| +0.9% | +$7.66K |
|
2796
PUT
OneWater Marine
ONEW
$222M
| $815K | ﹤0.01% |
22,500
-23,400
| -51% | -$691K |
|
2797
CALL
Equinox Gold
EQX
$7.41B
| $813K | ﹤0.01% |
177,700
-268,300
| -60% | -$1.35M |
|
2798
PUT
TH International
THCH
$56.1M
| $813K | ﹤0.01% |
56,680
+41,800
| +281% | +$751K |
|
2799
PUT
Groupon
GRPN
$1.05B
| $812K | ﹤0.01% |
137,500
+114,600
| +500% | +$507K |
|
|
INFN
2800
CALL
DELISTED
Infinera Corporation Common Stock
INFN
| $812K | ﹤0.01% |
168,300
-3,000
| -2% | -$16.5K |
|
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.