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 |
Alibaba
BABA
|
+$120M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$93.9M |
| 3 |
Walt Disney
DIS
|
+$71.7M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$41.7M |
| 5 |
Citigroup
C
|
+$39.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$136M |
| 2 |
Amazon
AMZN
|
+$118M |
| 3 |
SPDR Gold Trust
GLD
|
+$56.2M |
| 4 |
Microsoft
MSFT
|
+$52.4M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$45.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.33% |
| 2 | Consumer Discretionary | 0.3% |
| 3 | Communication Services | 0.21% |
| 4 | Financials | 0.19% |
| 5 | Healthcare | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
51
PUT
Salesforce
CRM
$139B
| $291M | 0.19% |
1,106,200
-92,700
| -8% | -$21M |
|
52
CALL
ExxonMobil
XOM
$629B
| $287M | 0.18% |
2,867,900
+872,700
| +44% | +$91.7M |
|
53
PUT
Micron Technology
MU
$1.1T
| $277M | 0.18% |
3,244,300
+504,100
| +18% | +$37.4M |
|
54
PUT
JPMorgan Chase
JPM
$918B
| $275M | 0.18% |
1,619,500
-123,900
| -7% | -$18.8M |
|
|
55
PUT
ExxonMobil
XOM
$629B
| $273M | 0.17% |
2,744,500
+899,800
| +49% | +$94.6M |
|
|
56
PUT
Alibaba
BABA
$283B
| $271M | 0.17% |
3,498,000
+278,600
| +9% | +$22.2M |
|
57
CALL
Eli Lilly
LLY
$1.05T
| $268M | 0.17% |
460,200
+95,500
| +26% | +$55.7M |
|
|
58
CALL
Walt Disney
DIS
$167B
| $266M | 0.17% |
2,947,600
-1,212,300
| -29% | -$107M |
|
59
CALL
Pinduoduo
PDD
$121B
| $264M | 0.17% |
1,805,200
+282,100
| +19% | +$34.2M |
|
60
PUT
Intel
INTC
$530B
| $259M | 0.17% |
5,154,200
+634,700
| +14% | +$25.8M |
|
61
CALL
TSMC
TSM
$2.2T
| $257M | 0.16% |
2,468,100
+834,200
| +51% | +$79.6M |
|
62
PUT
Chevron
CVX
$381B
| $256M | 0.16% |
1,718,900
+967,300
| +129% | +$146M |
|
|
63
PUT
TSMC
TSM
$2.2T
| $252M | 0.16% |
2,425,700
+611,600
| +34% | +$58.3M |
|
|
64
CALL
Intel
INTC
$530B
| $236M | 0.15% |
4,687,200
+68,900
| +1% | +$2.8M |
|
|
65
PUT
Citigroup
C
$223B
| $233M | 0.15% |
4,522,100
+918,500
| +25% | +$40.7M |
|
66
PUT
Palo Alto Networks
PANW
$279B
| $232M | 0.15% |
1,574,200
+242,800
| +18% | +$32.5M |
|
67
CALL
Goldman Sachs
GS
$320B
| $228M | 0.15% |
592,300
+72,400
| +14% | +$24.2M |
|
|
68
PUT
Goldman Sachs
GS
$320B
| $228M | 0.15% |
664,600
+35,800
| +6% | +$11.9M |
|
69
CALL
iShares Silver Trust
SLV
$28.4B
| $219M | 0.14% |
10,056,200
+1,285,100
| +15% | +$27.4M |
|
70
PUT
PayPal
PYPL
$49.3B
| $218M | 0.14% |
3,555,900
+1,224,200
| +53% | +$70.1M |
|
71
PUT
Bank of America
BAC
$430B
| $218M | 0.14% |
6,470,300
-963,600
| -13% | -$28.1M |
|
72
PUT
lululemon athletica
LULU
$13.2B
| $217M | 0.14% |
424,000
+181,600
| +75% | +$78.5M |
|
73
CALL
iShares Morningstar Value ETF
ILCV
$1.3B
| $212M | 0.14% |
2,794,800
+405,100
| +17% | +$26.8M |
|
74
PUT
ARK Space & Defense Innovation ETF
ARKX
$823M
| $211M | 0.13% |
4,236,700
+2,103,700
| +99% | +$29.5M |
|
|
75
CALL
Salesforce
CRM
$139B
| $208M | 0.13% |
790,000
-109,600
| -12% | -$24.8M |
|
Similar funds
Simplex Trading's Q4 2023 Portfolio in Review
As of Q4 2023, Simplex Trading held 10,333 positions worth $156B, up 23% from $127B the previous quarter. Its ten largest holdings account for 42% of the portfolio.
Simplex Trading deployed $15.1B of net new capital in Q4 2023, opening 1,639 new positions and adding to 3,920 existing holdings. Its largest new stake was Walt Disney: 812,984 shares worth $73.4M.
By sector, the portfolio is most concentrated in Technology at 0.33% of assets, down from 0.44% a quarter earlier, followed by Consumer Discretionary and Communication Services.
On the sell side, the largest reduction was iShares 20+ Year Treasury Bond ETF, an estimated $136M trimmed.
- Simplex Trading's largest Q4 2023 buy was Walt Disney: 812,984 shares worth $73.4M.
- Simplex Trading added most to Alibaba in Q4 2023, an estimated $120M increase.
- Simplex Trading's biggest Q4 2023 reduction was iShares 20+ Year Treasury Bond ETF, cutting an estimated $136M.
- Simplex Trading fully exited Amazon in Q4 2023, selling an estimated $118M.
- Simplex Trading's ten largest holdings make up 42% of its $156B portfolio in Q4 2023.
- Simplex Trading opened 1,639 new positions and closed 1,508 in Q4 2023.
- Simplex Trading's portfolio value rose 23% quarter-over-quarter to $156B.
Based on Simplex Trading's 13F filing for Q4 2023, filed 2 Feb 2024.