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 | |
|---|---|---|---|---|---|---|
2726
PUT
Group 1 Automotive
GPI
$4B
| $877K | ﹤0.01% |
3,400
-2,200
| -39% | -$506K |
|
2727
Vermilion Energy
VET
$1.63B
| $876K | ﹤0.01% |
70,423
-38,638
| -35% | -$476K |
|
2728
PUT
Edgewell Personal Care
EPC
$1.29B
| $875K | ﹤0.01% |
21,200
+13,700
| +183% | +$585K |
|
|
LNW
2729
CALL
DELISTED
Light & Wonder
LNW
| $873K | ﹤0.01% |
12,700
-4,900
| -28% | -$304K |
|
2730
PUT
Opendoor
OPEN
$3.66B
| $873K | ﹤0.01% |
224,440
+92,483
| +70% | +$201K |
|
|
XIFR
2731
PUT
XPLR Infrastructure LP
XIFR
$1.18B
| $873K | ﹤0.01% |
14,900
-32,300
| -68% | -$1.94M |
|
2732
Eastman Chemical
EMN
$7.72B
| $871K | ﹤0.01% |
+10,410
| New | +$846K |
|
2733
CALL
Murphy USA
MUSA
$11.3B
| $871K | ﹤0.01% |
2,800
-200
| -7% | -$56K |
|
2734
Nasdaq
NDAQ
$52.5B
| $871K | ﹤0.01% |
+17,492
| New | +$947K |
|
2735
PUT
Teleflex
TFX
$5.86B
| $871K | ﹤0.01% |
3,600
| – | – |
|
2736
Teucrium Wheat Fund
WEAT
$293M
| $871K | ﹤0.01% |
27,061
+6,248
| +30% | +$205K |
|
2737
CALL
Apple Hospitality REIT
APLE
$3.98B
| $868K | ﹤0.01% |
57,500
+28,900
| +101% | +$438K |
|
2738
PUT
Edison International
EIX
$30.3B
| $868K | ﹤0.01% |
12,500
+5,500
| +79% | +$387K |
|
2739
CALL
Madison Square Garden
MSGS
$9.48B
| $865K | ﹤0.01% |
4,600
-4,700
| -51% | -$888K |
|
2740
ProShares Ultra Bloomberg Natural Gas
BOIL
$350M
| $864K | ﹤0.01% |
+1,253
| New | +$783K |
|
2741
PUT
Korn Ferry
KFY
$4.15B
| $861K | ﹤0.01% |
+17,400
| New | +$856K |
|
2742
PUT
Zymeworks
ZYME
$1.71B
| $859K | ﹤0.01% |
99,500
+43,000
| +76% | +$385K |
|
2743
Accel Entertainment
ACEL
$1.01B
| $857K | ﹤0.01% |
81,181
-66,091
| -45% | -$621K |
|
2744
CALL
Elanco Animal Health
ELAN
$12.7B
| $857K | ﹤0.01% |
85,200
-432,700
| -84% | -$4.02M |
|
2745
FLEX LNG
FLNG
$1.64B
| $856K | ﹤0.01% |
28,043
+10,163
| +57% | +$325K |
|
2746
CALL
Gerdau
GGB
$9.4B
| $855K | ﹤0.01% |
196,560
+119,520
| +155% | +$499K |
|
|
JMIA
2747
Jumia Technologies
JMIA
$752M
| $855K | ﹤0.01% |
250,064
+7,523
| +3% | +$23.1K |
|
2748
CALL
Atossa Therapeutics
ATOS
$23.8M
| $854K | ﹤0.01% |
45,220
-3,233
| -7% | -$39.2K |
|
2749
CALL
Aemetis
AMTX
$109M
| $853K | ﹤0.01% |
116,400
+107,300
| +1,179% | +$408K |
|
2750
CALL
Meritage Homes
MTH
$4.87B
| $853K | ﹤0.01% |
12,000
-20,200
| -63% | -$1.27M |
|
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.