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 | |
|---|---|---|---|---|---|---|
676
Goldman Sachs
GS
$324B
| $15.7M | 0.01% |
48,591
+48,575
| +303,594% | +$16M |
|
677
PUT
Cameco
CCJ
$39.4B
| $15.6M | 0.01% |
497,200
-162,300
| -25% | -$4.56M |
|
678
PUT
XPeng
XPEV
$12.3B
| $15.6M | 0.01% |
1,159,500
-26,800
| -2% | -$264K |
|
679
PUT
Eaton
ETN
$158B
| $15.4M | 0.01% |
76,500
-19,500
| -20% | -$3.43M |
|
680
CALL
NRG Energy
NRG
$29.5B
| $15.3M | 0.01% |
408,500
+140,700
| +53% | +$4.79M |
|
681
PUT
Workday
WDAY
$32.7B
| $15.2M | 0.01% |
67,200
-81,200
| -55% | -$16.3M |
|
682
CALL
Sony
SONY
$123B
| $15.1M | 0.01% |
837,500
-465,000
| -36% | -$8.72M |
|
683
First Solar
FSLR
$22.4B
| $15.1M | 0.01% |
+79,316
| New | +$15.7M |
|
684
Citigroup
C
$222B
| $15.1M | 0.01% |
327,126
-371,253
| -53% | -$17.4M |
|
685
CALL
Franco-Nevada
FNV
$41.3B
| $15M | 0.01% |
105,500
-133,900
| -56% | -$20.1M |
|
686
PUT
British American Tobacco
BTI
$134B
| $15M | 0.01% |
452,900
+177,700
| +65% | +$6.08M |
|
687
Johnson & Johnson
JNJ
$615B
| $15M | 0.01% |
+90,729
| New | +$14.6M |
|
688
PUT
Coherent
COHR
$61.1B
| $15M | 0.01% |
294,300
+84,100
| +40% | +$3.12M |
|
689
CALL
Spectrum Brands
SPB
$2.05B
| $15M | 0.01% |
191,900
-133,000
| -41% | -$9.49M |
|
690
PUT
Boston Properties
BXP
$10.8B
| $15M | 0.01% |
259,700
-18,600
| -7% | -$967K |
|
|
DFS
691
CALL
DELISTED
Discover Financial Services
DFS
| $15M | 0.01% |
195,600
+62,900
| +47% | +$6.59M |
|
692
CALL
Ally Financial
ALLY
$13.6B
| $14.9M | 0.01% |
553,500
-368,800
| -40% | -$9.81M |
|
693
CALL
L3Harris
LHX
$53.1B
| $14.9M | 0.01% |
76,200
-2,500
| -3% | -$478K |
|
694
CALL
Steel Dynamics
STLD
$34.4B
| $14.9M | 0.01% |
136,600
+5,900
| +5% | +$600K |
|
695
CVS Health
CVS
$138B
| $14.9M | 0.01% |
214,884
+71,184
| +50% | +$5.06M |
|
696
CALL
W.P. Carey
WPC
$16.8B
| $14.8M | 0.01% |
224,416
+185,414
| +475% | +$12.9M |
|
697
CALL
M&T Bank
MTB
$36.3B
| $14.8M | 0.01% |
119,900
+56,300
| +89% | +$6.81M |
|
698
PUT
Cleveland-Cliffs
CLF
$5.39B
| $14.7M | 0.01% |
879,800
-1,005,600
| -53% | -$16M |
|
699
D.R. Horton
DHI
$40B
| $14.7M | 0.01% |
+121,138
| New | +$13.2M |
|
|
700
PUT
M&T Bank
MTB
$36.3B
| $14.7M | 0.01% |
119,100
-16,700
| -12% | -$2.02M |
|
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.