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 | |
|---|---|---|---|---|---|---|
4776
Innoviz Technologies
INVZ
$84.1M
| $155K | ﹤0.01% |
187,864
-109,345
| -37% | -$83.1K |
|
4777
YieldMax NVDA Option Income Strategy ETF
NVDY
$1.29B
| $155K | ﹤0.01% |
6,476
-6,521
| -50% | -$164K |
|
4778
PUT
Synaptics
SYNA
$4.05B
| $155K | ﹤0.01% |
2,000
-7,500
| -79% | -$601K |
|
|
UHT
4779
CALL
Universal Health Realty Income Trust
UHT
$621M
| $155K | ﹤0.01% |
3,400
-1,700
| -33% | -$73.1K |
|
4780
CALL
Bright Horizons
BFAM
$4.35B
| $154K | ﹤0.01% |
1,100
-4,900
| -82% | -$634K |
|
4781
PUT
DTE Energy
DTE
$29.9B
| $154K | ﹤0.01% |
1,200
+500
| +71% | +$60.3K |
|
|
TDAY
4782
CALL
USA Today Co
TDAY
$1.29B
| $154K | ﹤0.01% |
27,500
-24,800
| -47% | -$120K |
|
|
LNW
4783
PUT
DELISTED
Light & Wonder
LNW
| $154K | ﹤0.01% |
1,700
-3,600
| -68% | -$377K |
|
4784
Lufax Holding
LU
$1.33B
| $154K | ﹤0.01% |
+44,281
| New | +$116K |
|
4785
CALL
SiTime
SITM
$13.8B
| $154K | ﹤0.01% |
900
-2,100
| -70% | -$301K |
|
4786
Simplify Short Term Treasury Futures Strategy ETF
TUA
$699M
| $154K | ﹤0.01% |
6,702
-21,083
| -76% | -$474K |
|
4787
CALL
Alpha Pro Tech
APT
$49.9M
| $153K | ﹤0.01% |
27,000
+25,900
| +2,355% | +$150K |
|
4788
CALL
MarketAxess Holdings
MKTX
$4.47B
| $153K | ﹤0.01% |
600
-9,500
| -94% | -$2.23M |
|
4789
CALL
Portland General Electric
POR
$5.82B
| $153K | ﹤0.01% |
3,200
+2,200
| +220% | +$103K |
|
4790
CALL
The RealReal
REAL
$1.41B
| $153K | ﹤0.01% |
48,800
-10,800
| -18% | -$32.5K |
|
4791
CALL
Gibraltar Industries
ROCK
$1.28B
| $153K | ﹤0.01% |
2,200
-1,200
| -35% | -$83.8K |
|
|
SAND
4792
PUT
DELISTED
Sandstorm Gold
SAND
| $153K | ﹤0.01% |
25,600
-8,700
| -25% | -$49.4K |
|
4793
CALL
Tennant Co
TNC
$1.44B
| $153K | ﹤0.01% |
1,600
| – | – |
|
4794
Annexon
ANNX
$796M
| $152K | ﹤0.01% |
+25,830
| New | +$153K |
|
4795
CALL
Belden
BDC
$3.97B
| $152K | ﹤0.01% |
1,300
+500
| +63% | +$50.1K |
|
|
CRON
4796
Cronos Group
CRON
$1.07B
| $152K | ﹤0.01% |
+69,730
| New | +$159K |
|
4797
PUT
Designer Brands
DBI
$315M
| $152K | ﹤0.01% |
20,700
-7,400
| -26% | -$51.8K |
|
4798
PUT
Honda
HMC
$39.8B
| $152K | ﹤0.01% |
4,800
-7,000
| -59% | -$222K |
|
4799
AdvisorShares MSOS 2X Daily ETF
MSOX
$45.3M
| $152K | ﹤0.01% |
3,249
+2,781
| +594% | +$138K |
|
4800
NextDecade
NEXT
$1.68B
| $152K | ﹤0.01% |
32,365
-177,945
| -85% | -$1.08M |
|
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.