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 | |
|---|---|---|---|---|---|---|
3276
Rogers Corp
ROG
$2.31B
| $680K | ﹤0.01% |
6,025
+202
| +3% | +$22.6K |
|
|
AZUL
3277
CALL
DELISTED
Azul
AZUL
| $678K | ﹤0.01% |
197,200
-45,400
| -19% | -$171K |
|
3278
PUT
Black Diamond Therapeutics
BDTX
$99.1M
| $678K | ﹤0.01% |
+155,900
| New | +$848K |
|
3279
CALL
Brown-Forman Class B
BF.B
$12.6B
| $678K | ﹤0.01% |
13,800
-34,400
| -71% | -$1.55M |
|
3280
Array Technologies
ARRY
$848M
| $677K | ﹤0.01% |
102,688
+35,181
| +52% | +$289K |
|
3281
CALL
PAR Technology
PAR
$681M
| $677K | ﹤0.01% |
13,000
+1,400
| +12% | +$72.8K |
|
3282
PUT
Kosmos Energy
KOS
$1.45B
| $676K | ﹤0.01% |
167,900
+119,300
| +245% | +$581K |
|
3283
CALL
RB Global
RBA
$21.7B
| $676K | ﹤0.01% |
8,400
-12,300
| -59% | -$998K |
|
3284
Knight Transportation
KNX
$11.5B
| $675K | ﹤0.01% |
12,527
-52,663
| -81% | -$2.73M |
|
3285
CVR Partners
UAN
$1.27B
| $675K | ﹤0.01% |
10,064
-5,200
| -34% | -$378K |
|
3286
PUT
ChargePoint
CHPT
$140M
| $674K | ﹤0.01% |
24,635
+8,085
| +49% | +$281K |
|
3287
PUT
Euronet Worldwide
EEFT
$3.01B
| $674K | ﹤0.01% |
6,800
-500
| -7% | -$50.6K |
|
3288
Saia
SAIA
$11.2B
| $673K | ﹤0.01% |
+1,540
| New | +$652K |
|
3289
CALL
CareDx
CDNA
$1.88B
| $671K | ﹤0.01% |
21,500
-900
| -4% | -$22.4K |
|
3290
CALL
Xenon Pharmaceuticals
XENE
$6.36B
| $669K | ﹤0.01% |
17,000
-5,400
| -24% | -$218K |
|
3291
PUT
Travere Therapeutics
TVTX
$5.27B
| $667K | ﹤0.01% |
47,700
+12,500
| +36% | +$130K |
|
3292
Amplify Junior Silver Miners ETF
SILJ
$3.29B
| $666K | ﹤0.01% |
51,719
-220,819
| -81% | -$2.68M |
|
3293
CALL
Arlo Technologies
ARLO
$1.51B
| $664K | ﹤0.01% |
54,900
-1,300
| -2% | -$17.2K |
|
|
GOOS
3294
CALL
Canada Goose Holdings
GOOS
$891M
| $664K | ﹤0.01% |
53,000
-76,700
| -59% | -$870K |
|
3295
PUT
Brookfield Renewable
BEPC
$5.94B
| $662K | ﹤0.01% |
20,300
-131,300
| -87% | -$3.81M |
|
3296
PUT
Churchill Downs
CHDN
$6.15B
| $662K | ﹤0.01% |
4,900
+4,800
| +4,800% | +$664K |
|
3297
PUT
Eversource Energy
ES
$28.1B
| $660K | ﹤0.01% |
9,700
-13,400
| -58% | -$866K |
|
3298
CALL
Vitesse Energy
VTS
$635M
| $660K | ﹤0.01% |
27,500
-7,500
| -21% | -$185K |
|
|
HOUS
3299
PUT
DELISTED
Anywhere Real Estate
HOUS
| $659K | ﹤0.01% |
+129,800
| New | +$602K |
|
3300
CALL
IES Holdings
IESC
$12B
| $658K | ﹤0.01% |
3,300
+200
| +6% | +$32.4K |
|
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.