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 | |
|---|---|---|---|---|---|---|
426
PUT
Global Payments
GPN
$21.6B
| $33.1M | 0.02% |
295,400
-33,300
| -10% | -$3.64M |
|
427
CALL
Archer Daniels Midland
ADM
$42.1B
| $33M | 0.02% |
653,900
-11,600
| -2% | -$628K |
|
428
PUT
Invesco Aerospace & Defense ETF
PPA
$8.03B
| $32.9M | 0.02% |
189,200
-27,600
| -13% | -$3.26M |
|
429
Starbucks
SBUX
$119B
| $32.8M | 0.02% |
359,550
+327,635
| +1,027% | +$31.7M |
|
430
PUT
Zscaler
ZS
$23B
| $32.7M | 0.02% |
181,500
-11,100
| -6% | -$2.15M |
|
431
CALL
Kroger
KR
$35.3B
| $32.6M | 0.02% |
532,500
-151,300
| -22% | -$8.88M |
|
432
PUT
Pinterest
PINS
$12.6B
| $32.5M | 0.02% |
1,121,000
+132,700
| +13% | +$4.17M |
|
433
CALL
Enterprise Products Partners
EPD
$84.1B
| $32.5M | 0.02% |
1,035,600
+595,900
| +136% | +$18.3M |
|
434
PUT
AT&T
T
$160B
| $32.3M | 0.02% |
1,418,900
+58,100
| +4% | +$1.31M |
|
435
CALL
American International
AIG
$41.5B
| $32.1M | 0.02% |
441,500
+35,200
| +9% | +$2.65M |
|
436
CALL
Cigna
CI
$75.4B
| $32.1M | 0.02% |
116,100
+78,700
| +210% | +$25.1M |
|
437
PUT
Southwest Airlines
LUV
$23.3B
| $31.9M | 0.02% |
950,200
-287,000
| -23% | -$9.16M |
|
438
CALL
GoDaddy
GDDY
$11.8B
| $31.9M | 0.02% |
161,400
-4,100
| -2% | -$749K |
|
439
CALL
Boston Scientific
BSX
$63.9B
| $31.8M | 0.02% |
356,300
-11,200
| -3% | -$986K |
|
440
CALL
Twilio
TWLO
$27.8B
| $31.8M | 0.02% |
293,800
+28,800
| +11% | +$2.63M |
|
441
CALL
Coupang
CPNG
$28.1B
| $31.6M | 0.02% |
1,437,900
-485,000
| -25% | -$11.9M |
|
442
CALL
Trade Desk
TTD
$8.26B
| $31.6M | 0.02% |
268,900
-53,000
| -16% | -$6.56M |
|
443
PUT
GE Vernova
GEV
$265B
| $31.5M | 0.02% |
95,900
-29,100
| -23% | -$9.1M |
|
444
CALL
Autodesk
ADSK
$43B
| $31.5M | 0.02% |
106,700
-48,500
| -31% | -$14.3M |
|
445
PUT
Danaher
DHR
$127B
| $31.5M | 0.02% |
148,300
+26,400
| +22% | +$6.49M |
|
|
446
PUT
Trade Desk
TTD
$8.26B
| $31.4M | 0.02% |
267,300
-43,300
| -14% | -$5.36M |
|
447
CALL
eBay
EBAY
$49.3B
| $31.4M | 0.02% |
506,200
+72,500
| +17% | +$4.61M |
|
448
PUT
SiriusXM
SIRI
$10B
| $31.3M | 0.02% |
1,373,900
-1,302,400
| -49% | -$33.2M |
|
449
PUT
Las Vegas Sands
LVS
$30B
| $31.3M | 0.02% |
608,900
-693,100
| -53% | -$35.9M |
|
450
PUT
Dollar General
DG
$26.5B
| $31.2M | 0.02% |
412,000
+79,500
| +24% | +$6.26M |
|
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.