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 | |
|---|---|---|---|---|---|---|
2326
CALL
WEC Energy
WEC
$37.7B
| $1.88M | ﹤0.01% |
19,500
+4,300
| +28% | +$381K |
|
2327
Hormel Foods
HRL
$13.9B
| $1.87M | ﹤0.01% |
59,129
+28,665
| +94% | +$910K |
|
2328
Vanguard FTSE Emerging Markets ETF
VWO
$119B
| $1.87M | ﹤0.01% |
+39,159
| New | +$1.74M |
|
2329
CALL
Asana
ASAN
$1.58B
| $1.87M | ﹤0.01% |
161,600
+8,600
| +6% | +$113K |
|
2330
Charter Communications
CHTR
$14.7B
| $1.87M | ﹤0.01% |
5,770
+3,787
| +191% | +$1.27M |
|
2331
PUT
Medpace
MEDP
$16.8B
| $1.87M | ﹤0.01% |
5,600
+5,100
| +1,020% | +$1.94M |
|
2332
PUT
Tenaris
TS
$29.1B
| $1.87M | ﹤0.01% |
58,800
+52,700
| +864% | +$1.56M |
|
2333
Incyte
INCY
$23.5B
| $1.87M | ﹤0.01% |
28,272
+10,097
| +56% | +$644K |
|
2334
PUT
Edgewise Therapeutics
EWTX
$4.39B
| $1.86M | ﹤0.01% |
69,900
+68,800
| +6,255% | +$1.37M |
|
2335
PUT
Grab
GRAB
$13.5B
| $1.86M | ﹤0.01% |
488,600
-250,700
| -34% | -$855K |
|
|
ABK
2336
PUT
DELISTED
Ambac Financial Group
ABK
| $1.85M | ﹤0.01% |
164,800
+144,700
| +720% | +$1.62M |
|
2337
CALL
Sabre
SABR
$656M
| $1.84M | ﹤0.01% |
502,900
+293,200
| +140% | +$911K |
|
2338
PUT
Velocity Financial
VEL
$683M
| $1.84M | ﹤0.01% |
94,100
+2,100
| +2% | +$39.6K |
|
2339
CALL
Banc of California
BANC
$3.28B
| $1.84M | ﹤0.01% |
125,200
+30,000
| +32% | +$416K |
|
|
COOP
2340
CALL
DELISTED
Mr. Cooper
COOP
| $1.84M | ﹤0.01% |
20,000
+5,800
| +41% | +$514K |
|
2341
PUT
Carlisle Companies
CSL
$13.6B
| $1.84M | ﹤0.01% |
4,100
+2,400
| +141% | +$993K |
|
2342
CALL
MakeMyTrip
MMYT
$4.67B
| $1.84M | ﹤0.01% |
19,800
+1,400
| +8% | +$132K |
|
|
SA
2343
CALL
Seabridge Gold
SA
$2.8B
| $1.84M | ﹤0.01% |
109,600
-28,600
| -21% | -$465K |
|
2344
CALL
W.P. Carey
WPC
$17.1B
| $1.84M | ﹤0.01% |
34,400
+2,700
| +9% | +$160K |
|
2345
CALL
Global Ship Lease
GSL
$1.57B
| $1.84M | ﹤0.01% |
68,900
+10,300
| +18% | +$264K |
|
2346
CALL
ALPS REIT Dividend Dogs ETF
RDOG
$11.6M
| $1.83M | ﹤0.01% |
39,000
+17,000
| +77% | +$681K |
|
|
2347
CALL
Edgewise Therapeutics
EWTX
$4.39B
| $1.83M | ﹤0.01% |
68,700
+62,900
| +1,084% | +$1.25M |
|
2348
CALL
Vermilion Energy
VET
$1.73B
| $1.83M | ﹤0.01% |
187,200
-48,800
| -21% | -$495K |
|
2349
Frontdoor
FTDR
$5.02B
| $1.83M | ﹤0.01% |
+38,081
| New | +$1.65M |
|
2350
CALL
GXO Logistics
GXO
$6.06B
| $1.83M | ﹤0.01% |
35,100
+7,200
| +26% | +$365K |
|
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.