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 | Miscellaneous | 98.27% |
| 2 | Technology | 0.33% |
| 3 | Consumer Discretionary | 0.3% |
| 4 | Communication Services | 0.21% |
| 5 | Financials | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
601
PUT
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$26.5B
| $26M | 0.02% |
51,300
+35,800
| +231% | +$16.6M |
|
602
CALL
Dell
DELL
$339B
| $26M | 0.02% |
339,600
+132,500
| +64% | +$9.36M |
|
603
PUT
e.l.f. Beauty
ELF
$6.47B
| $26M | 0.02% |
179,900
-33,800
| -16% | -$3.9M |
|
604
CALL
Celsius Holdings
CELH
$7.76B
| $25.8M | 0.02% |
473,400
+90,600
| +24% | +$4.84M |
|
605
CALL
Veeva Systems
VEEV
$44.5B
| $25.8M | 0.02% |
134,000
+62,300
| +87% | +$11.7M |
|
606
CALL
Match Group
MTCH
$9.61B
| $25.8M | 0.02% |
706,100
+223,300
| +46% | +$7.54M |
|
607
PUT
Southwest Airlines
LUV
$19.4B
| $25.7M | 0.02% |
890,700
-26,600
| -3% | -$692K |
|
608
PUT
BILL Holdings
BILL
$4.19B
| $25.7M | 0.02% |
315,100
+163,100
| +107% | +$13.4M |
|
609
PUT
Futu Holdings
FUTU
$17.1B
| $25.6M | 0.02% |
469,500
+201,800
| +75% | +$11.5M |
|
610
CALL
Duke Energy
DUK
$93.7B
| $25.5M | 0.02% |
263,100
+78,000
| +42% | +$7.09M |
|
611
CALL
Shell
SHEL
$266B
| $25.5M | 0.02% |
387,600
+5,300
| +1% | +$348K |
|
612
CALL
Caesars Entertainment
CZR
$6.05B
| $25.5M | 0.02% |
543,900
-17,800
| -3% | -$790K |
|
613
CALL
Akamai
AKAM
$15.1B
| $25.5M | 0.02% |
215,300
-4,400
| -2% | -$489K |
|
614
CALL
Sunrun
RUN
$2.14B
| $25.5M | 0.02% |
1,296,600
+652,600
| +101% | +$8.28M |
|
615
CALL
NetApp
NTAP
$36.5B
| $25.5M | 0.02% |
288,700
+157,800
| +121% | +$12.7M |
|
616
CALL
Regeneron Pharmaceuticals
REGN
$85.2B
| $25.4M | 0.02% |
28,900
-4,600
| -14% | -$3.79M |
|
617
PUT
Waste Management
WM
$87.5B
| $25.4M | 0.02% |
141,600
-98,000
| -41% | -$16.4M |
|
618
PUT
Elevance Health
ELV
$88.4B
| $25.2M | 0.02% |
53,500
+26,000
| +95% | +$12M |
|
619
PUT
Okta
OKTA
$29.8B
| $25.2M | 0.02% |
278,500
-85,900
| -24% | -$6.55M |
|
620
CALL
EQT Corp
EQT
$34.5B
| $25.2M | 0.02% |
652,000
+101,100
| +18% | +$4.1M |
|
621
CALL
S&P Global
SPGI
$131B
| $25.2M | 0.02% |
57,200
+4,200
| +8% | +$1.66M |
|
622
PUT
Tapestry
TPR
$24.4B
| $25M | 0.02% |
680,400
+571,900
| +527% | +$17.6M |
|
623
PUT
Danaher
DHR
$146B
| $25M | 0.02% |
191,100
-10,925
| -5% | -$2.33M |
|
624
CALL
Builders FirstSource
BLDR
$7.08B
| $25M | 0.02% |
149,500
-51,800
| -26% | -$6.88M |
|
625
PUT
Five Below
FIVE
$13.9B
| $24.9M | 0.02% |
116,600
+36,600
| +46% | +$6.72M |
|
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's Q4 2023 filing shows 1,639 new, 3,920 increased, 3,074 reduced and 1,507 closed positions. Its largest new stake was Walt Disney: 812,984 shares worth $73.4M. The largest sale was iShares 20+ Year Treasury Bond ETF, an estimated $136M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, up from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- 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 1,507 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.