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 | |
|---|---|---|---|---|---|---|
2276
CALL
Public Storage
PSA
$60.2B
| $2M | ﹤0.01% |
5,500
-6,100
| -53% | -$1.98M |
|
2277
PUT
Cipher Digital
CIFR
$9.47B
| $2M | ﹤0.01% |
516,200
+71,100
| +16% | +$300K |
|
2278
CALL
Equinor
EQNR
$95.9B
| $2M | ﹤0.01% |
78,800
-78,400
| -50% | -$2.07M |
|
2279
CALL
Martin Marietta Materials
MLM
$33.6B
| $1.99M | ﹤0.01% |
3,700
-800
| -18% | -$432K |
|
2280
CALL
Comfort Systems
FIX
$61B
| $1.99M | ﹤0.01% |
5,100
-4,500
| -47% | -$1.48M |
|
2281
PUT
Zai Lab
ZLAB
$2.17B
| $1.99M | ﹤0.01% |
82,300
-2,100
| -2% | -$39.7K |
|
2282
PUT
Ascendis Pharma A/S
ASND
$16.7B
| $1.99M | ﹤0.01% |
13,300
+5,900
| +80% | +$797K |
|
2283
Toyota
TM
$210B
| $1.98M | ﹤0.01% |
11,116
+10,204
| +1,119% | +$1.91M |
|
2284
Lumen
LUMN
$6.53B
| $1.98M | ﹤0.01% |
279,002
+71,836
| +35% | +$307K |
|
|
HOUS
2285
CALL
DELISTED
Anywhere Real Estate
HOUS
| $1.98M | ﹤0.01% |
389,300
+381,100
| +4,648% | +$1.77M |
|
2286
Edgewise Therapeutics
EWTX
$4.39B
| $1.98M | ﹤0.01% |
74,030
+71,296
| +2,608% | +$1.42M |
|
2287
CALL
Dover
DOV
$27.2B
| $1.97M | ﹤0.01% |
10,300
-1,500
| -13% | -$273K |
|
2288
CALL
Alcon
ALC
$33.1B
| $1.97M | ﹤0.01% |
19,700
-24,500
| -55% | -$2.3M |
|
|
SNV
2289
CALL
DELISTED
Synovus
SNV
| $1.97M | ﹤0.01% |
44,300
-15,800
| -26% | -$691K |
|
2290
PUT
PBF Energy
PBF
$7.29B
| $1.97M | ﹤0.01% |
63,600
-189,900
| -75% | -$6.9M |
|
|
CIVI
2291
CALL
DELISTED
Civitas Resources
CIVI
| $1.97M | ﹤0.01% |
38,800
-11,300
| -23% | -$700K |
|
2292
PUT
Lazard
LAZ
$4.37B
| $1.96M | ﹤0.01% |
39,000
+35,900
| +1,158% | +$1.66M |
|
2293
CALL
Rogers Communications
RCI
$17.7B
| $1.96M | ﹤0.01% |
48,800
+100
| +0.2% | +$3.91K |
|
2294
CALL
Transmedics
TMDX
$2.5B
| $1.96M | ﹤0.01% |
12,500
+2,900
| +30% | +$447K |
|
|
TEN
2295
CALL
Tsakos Energy Navigation Ltd
TEN
$1.19B
| $1.96M | ﹤0.01% |
78,100
+72,700
| +1,346% | +$1.85M |
|
2296
NexGen Energy
NXE
$6.05B
| $1.96M | ﹤0.01% |
299,976
-200,580
| -40% | -$1.25M |
|
2297
CALL
Atkore
ATKR
$2.59B
| $1.96M | ﹤0.01% |
23,100
+2,300
| +11% | +$250K |
|
2298
CALL
Dyne Therapeutics
DYN
$4.04B
| $1.96M | ﹤0.01% |
54,500
+51,600
| +1,779% | +$2.05M |
|
2299
CALL
Sable Offshore Corp
SOC
$903M
| $1.96M | ﹤0.01% |
+82,800
| New | +$1.49M |
|
2300
PUT
PagSeguro Digital
PAGS
$2.57B
| $1.96M | ﹤0.01% |
227,100
+59,300
| +35% | +$686K |
|
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.