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 | |
|---|---|---|---|---|---|---|
3326
PUT
Vanguard Total International Stock ETF
VXUS
$153B
| $640K | ﹤0.01% |
9,900
+8,200
| +482% | +$508K |
|
3327
PUT
BlackBerry
BB
$4.93B
| $639K | ﹤0.01% |
244,200
-148,000
| -38% | -$352K |
|
3328
Invesco DB Commodity Index Tracking Fund
DBC
$1.67B
| $639K | ﹤0.01% |
28,711
-1,575
| -5% | -$35.2K |
|
3329
PUT
Rubrik
RBRK
$15.4B
| $639K | ﹤0.01% |
19,900
-5,700
| -22% | -$189K |
|
3330
Aecom
ACM
$9.12B
| $638K | ﹤0.01% |
+6,184
| New | +$581K |
|
|
APLT
3331
CALL
DELISTED
Applied Therapeutics
APLT
| $638K | ﹤0.01% |
75,100
-50,200
| -40% | -$296K |
|
|
CMPS
3332
Compass Pathways
CMPS
$1.52B
| $637K | ﹤0.01% |
101,258
+79,766
| +371% | +$563K |
|
3333
National Grid
NGG
$81.6B
| $637K | ﹤0.01% |
9,713
+9,525
| +5,066% | +$584K |
|
|
EXAS
3334
DELISTED
Exact Sciences
EXAS
| $636K | ﹤0.01% |
9,340
-14,040
| -60% | -$792K |
|
3335
CALL
Gaotu Techedu
GOTU
$374M
| $636K | ﹤0.01% |
162,400
-44,000
| -21% | -$180K |
|
3336
PUT
MSC Industrial Direct
MSM
$7.07B
| $636K | ﹤0.01% |
7,400
-20,200
| -73% | -$1.65M |
|
3337
ProShares Ultra S&P500
SSO
$7.72B
| $636K | ﹤0.01% |
14,124
+13,006
| +1,163% | +$549K |
|
|
FFAI
3338
PUT
Faraday Future Intelligent Electric
FFAI
$12.4M
| $635K | ﹤0.01% |
1,476
+1,289
| +689% | +$1.79M |
|
3339
CALL
Globant
GLOB
$1.41B
| $634K | ﹤0.01% |
3,200
-22,100
| -87% | -$4.27M |
|
3340
PUT
OppFi
OPFI
$804M
| $634K | ﹤0.01% |
134,100
+26,500
| +25% | +$110K |
|
3341
TripAdvisor
TRIP
$1.66B
| $633K | ﹤0.01% |
+43,733
| New | +$678K |
|
3342
iShares 3-7 Year Treasury Bond ETF
IEI
$18.1B
| $632K | ﹤0.01% |
5,290
-5,667
| -52% | -$670K |
|
3343
Builders FirstSource
BLDR
$7.82B
| $631K | ﹤0.01% |
3,257
+1,792
| +122% | +$297K |
|
3344
Aflac
AFL
$64.4B
| $630K | ﹤0.01% |
5,639
+5,446
| +2,822% | +$553K |
|
3345
PUT
Veeco
VECO
$2.96B
| $629K | ﹤0.01% |
19,000
+9,500
| +100% | +$356K |
|
|
AKRO
3346
PUT
DELISTED
Akero Therapeutics
AKRO
| $628K | ﹤0.01% |
21,900
-2,900
| -12% | -$75.6K |
|
3347
PUT
LGI Homes
LGIH
$1.4B
| $628K | ﹤0.01% |
5,300
-1,400
| -21% | -$148K |
|
3348
CALL
Triumph Financial Inc
TFIN
$1.8B
| $628K | ﹤0.01% |
7,900
+4,900
| +163% | +$409K |
|
3349
Global X Copper Miners ETF NEW
COPX
$7.2B
| $627K | ﹤0.01% |
13,276
+2,192
| +20% | +$94.6K |
|
3350
CALL
Mama's Creations
MAMA
$825M
| $627K | ﹤0.01% |
85,900
+12,100
| +16% | +$93K |
|
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.