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 | |
|---|---|---|---|---|---|---|
2751
CALL
Arthur J. Gallagher & Co
AJG
$63.7B
| $1.21M | ﹤0.01% |
4,300
-10,300
| -71% | -$2.9M |
|
2752
Crocs
CROX
$6.69B
| $1.21M | ﹤0.01% |
8,345
-5,098
| -38% | -$696K |
|
2753
CALL
Willis Towers Watson
WTW
$27.9B
| $1.21M | ﹤0.01% |
4,100
-9,400
| -70% | -$2.63M |
|
2754
CALL
ING
ING
$93.8B
| $1.21M | ﹤0.01% |
66,400
-44,700
| -40% | -$799K |
|
2755
PUT
Corebridge Financial
CRBG
$14.1B
| $1.2M | ﹤0.01% |
41,300
-475,200
| -92% | -$13.4M |
|
2756
Forward Air
FWRD
$482M
| $1.2M | ﹤0.01% |
+33,914
| New | +$963K |
|
2757
CALL
Freshworks
FRSH
$2.84B
| $1.2M | ﹤0.01% |
104,500
-9,700
| -8% | -$116K |
|
2758
PUT
Mettler-Toledo International
MTD
$26.8B
| $1.2M | ﹤0.01% |
800
| – | – |
|
2759
CALL
Corbus Pharmaceuticals
CRBP
$170M
| $1.2M | ﹤0.01% |
58,100
+55,900
| +2,541% | +$2.86M |
|
2760
CALL
RenaissanceRe
RNR
$13.7B
| $1.2M | ﹤0.01% |
4,400
+2,200
| +100% | +$531K |
|
2761
PUT
Listed Funds Trust Roundhill Magnificent Seven ETF
MAGS
$3.91B
| $1.2M | ﹤0.01% |
25,100
+21,300
| +561% | +$963K |
|
|
ENV
2762
CALL
DELISTED
ENVESTNET, INC.
ENV
| $1.2M | ﹤0.01% |
19,100
+800
| +4% | +$49.9K |
|
2763
CALL
FS KKR Capital
FSK
$2.98B
| $1.2M | ﹤0.01% |
60,600
-72,900
| -55% | -$1.45M |
|
2764
PUT
Upwork
UPWK
$1.09B
| $1.19M | ﹤0.01% |
114,300
-26,000
| -19% | -$271K |
|
2765
CALL
Workiva
WK
$2.94B
| $1.19M | ﹤0.01% |
15,100
+5,800
| +62% | +$435K |
|
2766
CALL
Ventas
VTR
$48.9B
| $1.19M | ﹤0.01% |
18,600
-148,600
| -89% | -$8.68M |
|
2767
CALL
First Horizon
FHN
$12.1B
| $1.19M | ﹤0.01% |
76,700
-56,700
| -43% | -$900K |
|
2768
CALL
Aehr Test Systems
AEHR
$2.48B
| $1.19M | ﹤0.01% |
92,600
+4,500
| +5% | +$65.1K |
|
2769
McEwen Inc
MUX
$1.03B
| $1.19M | ﹤0.01% |
127,921
+7,079
| +6% | +$65.4K |
|
2770
PUT
Sempra
SRE
$60.8B
| $1.19M | ﹤0.01% |
14,200
-4,800
| -25% | -$384K |
|
2771
CALL
Republic Services
RSG
$66.7B
| $1.18M | ﹤0.01% |
5,900
| – | – |
|
2772
Schwab US Dividend Equity ETF
SCHD
$102B
| $1.18M | ﹤0.01% |
42,051
+19,344
| +85% | +$527K |
|
2773
Freshpet
FRPT
$2.83B
| $1.18M | ﹤0.01% |
8,649
+3,733
| +76% | +$489K |
|
|
GDEN
2774
CALL
DELISTED
Golden Entertainment
GDEN
| $1.18M | ﹤0.01% |
37,200
+29,900
| +410% | +$922K |
|
2775
TeraWulf
WULF
$9.15B
| $1.18M | ﹤0.01% |
252,489
-66,545
| -21% | -$302K |
|
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.