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 |
Apple
AAPL
|
+$552M |
| 2 |
Strategy Inc
MSTR
|
+$85.8M |
| 3 |
MSTX
Defiance Daily Target 2x Long MSTR ETF
MSTX
|
+$48.1M |
| 4 |
Intel
INTC
|
+$45.4M |
| 5 |
Uber
UBER
|
+$43M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$133M |
| 2 |
Pinduoduo
PDD
|
+$82.6M |
| 3 |
Boeing
BA
|
+$49.8M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$45.1M |
| 5 |
Microsoft
MSFT
|
+$41M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.68% |
| 2 | Consumer Discretionary | 0.23% |
| 3 | Healthcare | 0.19% |
| 4 | Financials | 0.13% |
| 5 | Communication Services | 0.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
526
CALL
Linde
LIN
$235B
| $24.7M | 0.01% |
59,100
+1,900
| +3% | +$866K |
|
527
PUT
Microchip Technology
MCHP
$46.2B
| $24.7M | 0.01% |
431,200
+221,000
| +105% | +$15.2M |
|
528
CALL
Chewy
CHWY
$8.81B
| $24.7M | 0.01% |
737,600
-100
| -0% | -$3.11K |
|
529
CALL
Dow Inc
DOW
$22.5B
| $24.6M | 0.01% |
614,100
+223,900
| +57% | +$10.4M |
|
|
MSTX
530
Defiance Daily Target 2x Long MSTR ETF
MSTX
$178M
| $24.5M | 0.01% |
69,735
+67,890
| +3,680% | +$48.1M |
|
531
CALL
Cboe Global Markets
CBOE
$29.5B
| $24.5M | 0.01% |
125,200
+15,400
| +14% | +$3.17M |
|
532
CALL
S&P Global
SPGI
$127B
| $24.5M | 0.01% |
49,100
+6,900
| +16% | +$3.5M |
|
533
CALL
Okta
OKTA
$23.8B
| $24.4M | 0.01% |
309,400
+25,300
| +9% | +$1.96M |
|
|
DOCU
534
PUT
DocuSign
DOCU
$9.14B
| $24.3M | 0.01% |
270,200
+86,600
| +47% | +$6.92M |
|
535
PUT
Thermo Fisher Scientific
TMO
$196B
| $24.3M | 0.01% |
46,700
-14,900
| -24% | -$8.19M |
|
536
PUT
Coherent
COHR
$61.1B
| $24.3M | 0.01% |
256,300
-60,800
| -19% | -$6.08M |
|
537
CALL
Rigetti Computing
RGTI
$5.06B
| $24.2M | 0.01% |
1,588,300
+1,563,300
| +6,253% | +$5.83M |
|
538
PUT
Shell
SHEL
$243B
| $24.2M | 0.01% |
386,400
-61,900
| -14% | -$4.06M |
|
539
CALL
Celestica
CLS
$38.6B
| $24.1M | 0.01% |
261,600
-42,700
| -14% | -$3.34M |
|
540
PUT
HCA Healthcare
HCA
$82.5B
| $24.1M | 0.01% |
80,400
+6,200
| +8% | +$2.17M |
|
541
CALL
Teck Resources
TECK
$28B
| $24.1M | 0.01% |
595,200
+168,900
| +40% | +$7.89M |
|
542
CALL
Colgate-Palmolive
CL
$73.3B
| $24.1M | 0.01% |
265,200
-35,700
| -12% | -$3.41M |
|
543
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
$16.4B
| $24.1M | 0.01% |
+306,276
| New | +$24.3M |
|
544
Cigna
CI
$75.4B
| $24M | 0.01% |
87,055
+82,528
| +1,823% | +$26.3M |
|
545
CALL
Rio Tinto
RIO
$150B
| $24M | 0.01% |
407,900
+61,700
| +18% | +$3.94M |
|
|
AXON
546
PUT
Axon Enterprise
AXON
$39.6B
| $23.8M | 0.01% |
40,000
+400
| +1% | +$218K |
|
547
PUT
Valero Energy
VLO
$92.3B
| $23.7M | 0.01% |
193,700
-59,800
| -24% | -$8M |
|
548
CALL
Take-Two Interactive
TTWO
$43.4B
| $23.7M | 0.01% |
128,800
-99,600
| -44% | -$17.3M |
|
549
CALL
TeraWulf
WULF
$9.66B
| $23.6M | 0.01% |
4,177,100
+2,714,600
| +186% | +$17.5M |
|
550
PUT
Energy Transfer Partners
ET
$70.1B
| $23.6M | 0.01% |
1,204,700
+181,200
| +18% | +$3.21M |
|
Similar funds
Simplex Trading's Q4 2024 Portfolio in Review
As of Q4 2024, Simplex Trading held 10,008 positions worth $179B, up 4.8% from $170B the previous quarter. Its ten largest holdings account for 49% of the portfolio.
Simplex Trading's Q4 2024 filing shows 1,520 new, 3,222 increased, 3,616 reduced and 1,504 closed positions. Its largest new stake was Strategy Inc: 285,022 shares worth $82.5M. The largest sale was NVIDIA, an estimated $133M.
By sector, the portfolio is most concentrated in Technology at 0.68% of assets, up from 0.4% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q4 2024 buy was Strategy Inc: 285,022 shares worth $82.5M.
- Simplex Trading added most to Apple in Q4 2024, an estimated $552M increase.
- Simplex Trading's biggest Q4 2024 reduction was NVIDIA, cutting an estimated $133M.
- Simplex Trading fully exited Pinduoduo in Q4 2024, selling an estimated $82.6M.
- Simplex Trading's ten largest holdings make up 49% of its $179B portfolio in Q4 2024.
- Simplex Trading opened 1,520 new positions and closed 1,504 in Q4 2024.
- Simplex Trading's portfolio value rose 4.8% quarter-over-quarter to $179B.
Based on Simplex Trading's 13F filing for Q4 2024, filed 11 Feb 2025.