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 |
Boeing
BA
|
+$55.8M |
| 2 |
Microsoft
MSFT
|
+$42.2M |
| 3 |
Pinduoduo
PDD
|
+$41.3M |
| 4 |
Apple
AAPL
|
+$32M |
| 5 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$28.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$95.2M |
| 2 |
Citigroup
C
|
+$57.2M |
| 3 |
Pfizer
PFE
|
+$56.4M |
| 4 |
TSMC
TSM
|
+$39.7M |
| 5 |
Starbucks
SBUX
|
+$35.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.4% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.15% |
| 4 | Industrials | 0.13% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
501
PUT
Dollar General
DG
$26.5B
| $28.1M | 0.02% |
332,500
+128,600
| +63% | +$14.1M |
|
502
PUT
VF Corp
VFC
$6.74B
| $28.1M | 0.02% |
1,409,100
+64,900
| +5% | +$1.09M |
|
|
503
Direxion Daily Semiconductor Bull 3X ETF
SOXL
$22B
| $28.1M | 0.02% |
764,731
+691,876
| +950% | +$28.3M |
|
504
PUT
Marriott International
MAR
$97.5B
| $27.9M | 0.02% |
112,300
-46,000
| -29% | -$10.7M |
|
505
CALL
Core Scientific
CORZ
$7.51B
| $27.9M | 0.02% |
2,353,600
+598,400
| +34% | +$6.2M |
|
506
PUT
Cigna
CI
$75.4B
| $27.9M | 0.02% |
80,500
-30,300
| -27% | -$10.4M |
|
507
CALL
Altria Group
MO
$121B
| $27.8M | 0.02% |
545,500
-180,800
| -25% | -$9.14M |
|
508
CALL
Intercontinental Exchange
ICE
$80.6B
| $27.8M | 0.02% |
173,200
+61,100
| +55% | +$9.42M |
|
509
PUT
Paychex
PAYX
$39.4B
| $27.7M | 0.02% |
206,500
+184,700
| +847% | +$23.5M |
|
510
PUT
NIO
NIO
$11.7B
| $27.6M | 0.02% |
4,139,000
-295,900
| -7% | -$1.36M |
|
511
PUT
Iron Mountain
IRM
$37B
| $27.6M | 0.02% |
345,100
+280,700
| +436% | +$30M |
|
512
CALL
KKR & Co
KKR
$85.8B
| $27.6M | 0.02% |
211,400
+85,700
| +68% | +$10.1M |
|
513
CALL
Vertex Pharmaceuticals
VRTX
$120B
| $27.5M | 0.02% |
59,200
+17,600
| +42% | +$8.45M |
|
514
CALL
Cheniere Energy
LNG
$56B
| $27.5M | 0.02% |
152,900
+35,500
| +30% | +$6.38M |
|
515
PUT
KB Home
KBH
$3.46B
| $27.5M | 0.02% |
320,500
+114,500
| +56% | +$9.2M |
|
516
CALL
Upstart Holdings
UPST
$2.74B
| $27.3M | 0.02% |
682,200
-19,100
| -3% | -$635K |
|
517
PUT
Eaton
ETN
$158B
| $27.3M | 0.02% |
82,300
-16,500
| -17% | -$5.04M |
|
518
CALL
Linde
LIN
$235B
| $27.3M | 0.02% |
57,200
-57,000
| -50% | -$26M |
|
519
PUT
Cloudflare
NET
$95.5B
| $27.1M | 0.02% |
334,600
+7,800
| +2% | +$627K |
|
520
CALL
Synopsys
SNPS
$72.3B
| $26.9M | 0.02% |
53,200
-500
| -0.9% | -$268K |
|
|
SCIU
521
CALL
DELISTED
Global X Scientific Beta US ETF
SCIU
| $26.9M | 0.02% |
930,300
+331,200
| +55% | +$9.57M |
|
522
CALL
Invesco Aerospace & Defense ETF
PPA
$8.03B
| $26.9M | 0.02% |
161,800
-104,300
| -39% | -$11.3M |
|
523
CALL
Honeywell
HON
$73.8B
| $26.9M | 0.02% |
137,824
+34,376
| +33% | +$6.67M |
|
|
MPT
524
PUT
Medical Properties Trust
MPT
$2.88B
| $26.6M | 0.02% |
4,544,800
+1,691,400
| +59% | +$8.34M |
|
525
CALL
AST SpaceMobile
ASTS
$18.5B
| $26.6M | 0.02% |
1,015,500
+273,600
| +37% | +$6.17M |
|
Similar funds
Simplex Trading's Q3 2024 Portfolio in Review
As of Q3 2024, Simplex Trading held 9,964 positions worth $170B, up 5.3% from $162B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q3 2024 filing shows 1,185 new, 3,232 increased, 3,829 reduced and 1,476 closed positions. Its largest new stake was Boeing: 325,328 shares worth $49.5M. The largest sale was Broadcom, an estimated $95.2M.
By sector, the portfolio is most concentrated in Technology at 0.4% of assets, down from 0.53% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2024 buy was Boeing: 325,328 shares worth $49.5M.
- Simplex Trading added most to Pinduoduo in Q3 2024, an estimated $41.3M increase.
- Simplex Trading's biggest Q3 2024 reduction was Citigroup, cutting an estimated $57.2M.
- Simplex Trading fully exited Broadcom in Q3 2024, selling an estimated $95.2M.
- Simplex Trading's ten largest holdings make up 50% of its $170B portfolio in Q3 2024.
- Simplex Trading opened 1,185 new positions and closed 1,476 in Q3 2024.
- Simplex Trading's portfolio value rose 5.3% quarter-over-quarter to $170B.
Based on Simplex Trading's 13F filing for Q3 2024, filed 8 Nov 2024.