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 | |
|---|---|---|---|---|---|---|
|
HI
6176
CALL
DELISTED
Hillenbrand
HI
| $35K | ﹤0.01% |
700
-500
| -42% | -$24.1K |
|
|
HIVE
6177
PUT
HIVE Digital Technologies
HIVE
$802M
| $35K | ﹤0.01% |
7,600
-24,700
| -76% | -$83.2K |
|
6178
IDEAYA Biosciences
IDYA
$3.5B
| $35K | ﹤0.01% |
1,498
+1,496
| +74,800% | +$30.8K |
|
|
IMMP
6179
CALL
Immutep
IMMP
$56M
| $35K | ﹤0.01% |
16,700
+6,900
| +70% | +$12.9K |
|
6180
PUT
Kinetik
KNTK
$3.68B
| $35K | ﹤0.01% |
1,000
-3,000
| -75% | -$95.2K |
|
6181
CALL
KT
KT
$8.8B
| $35K | ﹤0.01% |
3,100
-1,200
| -28% | -$14K |
|
6182
CALL
Lindsay Corp
LNN
$1.12B
| $35K | ﹤0.01% |
+300
| New | +$37.3K |
|
6183
CALL
Comstock
LODE
$212M
| $35K | ﹤0.01% |
4,910
+4,510
| +1,128% | +$28K |
|
6184
NiSource
NI
$21.6B
| $35K | ﹤0.01% |
+1,287
| New | +$35.7K |
|
6185
Rocket Companies
RKT
$37.5B
| $35K | ﹤0.01% |
4,000
| – | – |
|
6186
Seadrill
SDRL
$2.7B
| $35K | ﹤0.01% |
860
-82
| -9% | -$3.05K |
|
6187
TD Synnex
SNX
$20.2B
| $35K | ﹤0.01% |
379
-118
| -24% | -$10.8K |
|
6188
CALL
Spire Global
SPIR
$440M
| $35K | ﹤0.01% |
8,550
+7,775
| +1,003% | +$41.4K |
|
6189
Sportsman's Warehouse
SPWH
$45.3M
| $35K | ﹤0.01% |
+6,211
| New | +$37.4K |
|
6190
Trinity Capital Inc.
TRIN
$1.56B
| $35K | ﹤0.01% |
2,703
-14,920
| -85% | -$187K |
|
6191
CALL
U-Haul Holding Co Series N
UHAL.B
$12.3B
| $35K | ﹤0.01% |
700
-19,700
| -97% | -$1.03M |
|
|
ZYXI
6192
CALL
DELISTED
Zynex
ZYXI
| $35K | ﹤0.01% |
3,700
+2,300
| +164% | +$23.9K |
|
|
CTEV
6193
CALL
Claritev Corp
CTEV
$402M
| $35K | ﹤0.01% |
418
+270
| +182% | +$14.4K |
|
|
GMDA
6194
PUT
DELISTED
Gamida Cell Ltd. Ordinary Shares
GMDA
| $35K | ﹤0.01% |
18,400
+11,900
| +183% | +$20.5K |
|
|
PNT
6195
CALL
DELISTED
POINT Biopharma Global Inc. Common Stock
PNT
| $35K | ﹤0.01% |
3,900
| – | – |
|
|
CANO
6196
PUT
DELISTED
Cano Health, Inc.
CANO
| $35K | ﹤0.01% |
254
+126
| +98% | +$16.2K |
|
|
APPH
6197
CALL
DELISTED
AppHarvest, Inc. Common Stock
APPH
| $35K | ﹤0.01% |
94,900
-45,500
| -32% | -$20.6K |
|
6198
CALL
American Resources Corp
AREC
$196M
| $34K | ﹤0.01% |
17,600
-24,100
| -58% | -$36.8K |
|
|
ARR
6199
PUT
Armour Residential REIT
ARR
$2.33B
| $34K | ﹤0.01% |
1,280
-1,860
| -59% | -$47.4K |
|
6200
CALL
Aterian
ATER
$4.23M
| $34K | ﹤0.01% |
6,258
-11,275
| -64% | -$87.7K |
|
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.