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 | |
|---|---|---|---|---|---|---|
626
CALL
LyondellBasell Industries
LYB
$20B
| $21.2M | 0.01% |
220,900
+136,200
| +161% | +$13.1M |
|
627
CALL
Okta
OKTA
$23.6B
| $21.1M | 0.01% |
284,100
-11,600
| -4% | -$1.01M |
|
628
CALL
Kinder Morgan
KMI
$72.4B
| $21.1M | 0.01% |
956,000
-404,800
| -30% | -$8.53M |
|
629
Occidental Petroleum
OXY
$57.7B
| $21M | 0.01% |
+407,778
| New | +$23.3M |
|
630
PUT
Floor & Decor
FND
$5.66B
| $21M | 0.01% |
169,100
+4,900
| +3% | +$509K |
|
631
PUT
US Bancorp Series B Preferred Stock
USB.PRH
$741M
| $20.8M | 0.01% |
455,100
-84,300
| -16% | -$1.84M |
|
632
CALL
Teradyne
TER
$58.6B
| $20.8M | 0.01% |
155,000
+81,900
| +112% | +$11M |
|
633
PUT
Petrobras
PBR
$124B
| $20.7M | 0.01% |
1,439,900
+20,400
| +1% | +$300K |
|
634
CALL
BHP
BHP
$213B
| $20.6M | 0.01% |
363,100
+111,700
| +44% | +$6.17M |
|
635
PUT
Lyft
LYFT
$5.31B
| $20.6M | 0.01% |
1,613,700
+131,800
| +9% | +$1.57M |
|
636
CALL
Albemarle
ALB
$13.9B
| $20.5M | 0.01% |
216,800
+20,300
| +10% | +$1.8M |
|
637
PUT
Waste Management
WM
$95.3B
| $20.5M | 0.01% |
98,900
+80,900
| +449% | +$16.9M |
|
638
PUT
Crocs
CROX
$6.6B
| $20.4M | 0.01% |
141,200
+14,800
| +12% | +$2.02M |
|
639
PUT
Expedia Group
EXPE
$30.7B
| $20.4M | 0.01% |
137,700
-21,000
| -13% | -$2.78M |
|
640
CALL
Nucor
NUE
$54.9B
| $20.4M | 0.01% |
135,400
-4,300
| -3% | -$647K |
|
641
PUT
ProShares Ultra Bloomberg Natural Gas
BOIL
$425M
| $20.3M | 0.01% |
93,550
+12,890
| +16% | +$1.33M |
|
|
K
642
CALL
DELISTED
Kellanova
K
| $20.3M | 0.01% |
262,400
+136,500
| +108% | +$9.72M |
|
643
CALL
Electronic Arts
EA
$52.4B
| $20.3M | 0.01% |
141,400
+46,000
| +48% | +$6.67M |
|
644
CALL
Sysco
SYY
$38.8B
| $20.2M | 0.01% |
259,400
+34,700
| +15% | +$2.61M |
|
645
Lamb Weston
LW
$6.68B
| $20.1M | 0.01% |
311,122
+207,494
| +200% | +$13.7M |
|
646
PUT
MGM Resorts International
MGM
$11.6B
| $20.1M | 0.01% |
514,100
+314,100
| +157% | +$12.4M |
|
647
CALL
C.H. Robinson
CHRW
$24.4B
| $20.1M | 0.01% |
182,000
+34,800
| +24% | +$3.38M |
|
648
PUT
Whirlpool
WHR
$2.32B
| $20M | 0.01% |
187,300
-27,400
| -13% | -$2.75M |
|
|
649
TSMC
TSM
$2.16T
| $20M | 0.01% |
115,312
-232,839
| -67% | -$39.7M |
|
650
CALL
AMC Entertainment Holdings
AMC
$1.94B
| $20M | 0.01% |
4,393,900
+730,400
| +20% | +$3.64M |
|
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.