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 |
Amazon
AMZN
|
+$113M |
| 2 |
SPDR Gold Trust
GLD
|
+$68.6M |
| 3 |
NVIDIA
NVDA
|
+$63.4M |
| 4 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$55.2M |
| 5 |
Apple
AAPL
|
+$54.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Netflix
NFLX
|
+$27.1M |
| 2 |
Qualcomm
QCOM
|
+$24.6M |
| 3 |
Walt Disney
DIS
|
+$21.2M |
| 4 |
Advanced Micro Devices
AMD
|
+$18.2M |
| 5 |
Snowflake
SNOW
|
+$16.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.44% |
| 2 | Consumer Discretionary | 0.32% |
| 3 | Healthcare | 0.22% |
| 4 | Financials | 0.17% |
| 5 | Communication Services | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2651
PUT
Pinnacle Financial Partners Inc
PNFP
$15.5B
| $1M | ﹤0.01% |
15,000
+2,000
| +15% | +$135K |
|
2652
PUT
Agios Pharmaceuticals
AGIO
$2.16B
| $1M | ﹤0.01% |
40,600
+5,800
| +17% | +$153K |
|
2653
PUT
Stratasys
SSYS
$697M
| $1M | ﹤0.01% |
73,700
-17,700
| -19% | -$280K |
|
2654
PUT
Cal-Maine
CALM
$4.28B
| $1M | ﹤0.01% |
20,700
+9,700
| +88% | +$451K |
|
2655
PUT
GDS Holdings
GDS
$6.34B
| $1M | ﹤0.01% |
91,400
+24,400
| +36% | +$279K |
|
2656
CALL
Ares Management
ARES
$28.5B
| $997K | ﹤0.01% |
9,700
-1,700
| -15% | -$172K |
|
2657
PUT
Nordic American Tanker
NAT
$1.37B
| $997K | ﹤0.01% |
242,000
-214,900
| -47% | -$858K |
|
2658
PUT
Rocket Pharmaceuticals
RCKT
$348M
| $997K | ﹤0.01% |
48,700
+46,800
| +2,463% | +$851K |
|
|
WW
2659
DELISTED
WW International
WW
| $997K | ﹤0.01% |
90,072
-139,858
| -61% | -$1.37M |
|
2660
PUT
Otis Worldwide
OTIS
$27.4B
| $995K | ﹤0.01% |
12,400
-5,100
| -29% | -$436K |
|
2661
CALL
SM Energy
SM
$7.96B
| $995K | ﹤0.01% |
25,100
+15,900
| +173% | +$603K |
|
2662
PUT
Fastenal
FAST
$54B
| $994K | ﹤0.01% |
36,400
-74,400
| -67% | -$2.11M |
|
2663
PUT
Beam Therapeutics
BEAM
$2.58B
| $993K | ﹤0.01% |
41,300
+36,600
| +779% | +$981K |
|
|
NNDM
2664
CALL
Nano Dimension
NNDM
$309M
| $993K | ﹤0.01% |
365,400
+9,000
| +3% | +$26.1K |
|
|
FFAI
2665
CALL
Faraday Future Intelligent Electric
FFAI
$15.8M
| $993K | ﹤0.01% |
+42
| New | +$10.9M |
|
2666
PagSeguro Digital
PAGS
$2.57B
| $992K | ﹤0.01% |
115,261
+59,773
| +108% | +$562K |
|
2667
CALL
Equinox Gold
EQX
$7.32B
| $991K | ﹤0.01% |
234,300
+56,600
| +32% | +$273K |
|
2668
PUT
Murphy USA
MUSA
$11.3B
| $991K | ﹤0.01% |
2,900
+2,100
| +263% | +$667K |
|
2669
Nabors Industries
NBR
$1.23B
| $990K | ﹤0.01% |
8,040
+6,030
| +300% | +$701K |
|
2670
Star Bulk Carriers
SBLK
$3.14B
| $990K | ﹤0.01% |
51,384
+30,757
| +149% | +$548K |
|
2671
CALL
Sabre
SABR
$656M
| $989K | ﹤0.01% |
220,400
-13,400
| -6% | -$60.8K |
|
2672
United Airlines
UAL
$38.4B
| $989K | ﹤0.01% |
23,403
+21,403
| +1,070% | +$1.08M |
|
2673
Vanguard S&P 500 ETF
VOO
$968B
| $989K | ﹤0.01% |
+2,519
| New | +$1.03M |
|
2674
PUT
Omega Healthcare
OHI
$15.4B
| $988K | ﹤0.01% |
29,800
-15,200
| -34% | -$486K |
|
2675
CALL
XP
XP
$8.62B
| $988K | ﹤0.01% |
42,900
-254,400
| -86% | -$6.38M |
|
Similar funds
Simplex Trading's Q3 2023 Portfolio in Review
As of Q3 2023, Simplex Trading held 10,417 positions worth $127B, up 4.5% from $122B the previous quarter. Its ten largest holdings account for 44% of the portfolio.
Simplex Trading deployed $11.9B of net new capital in Q3 2023, opening 1,399 new positions and adding to 3,690 existing holdings. Its largest new stake was Amazon: 841,102 shares worth $107M.
By sector, the portfolio is most concentrated in Technology at 0.44% of assets, up from 0.41% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Netflix, an estimated $27.1M trimmed.
- Simplex Trading's largest Q3 2023 buy was Amazon: 841,102 shares worth $107M.
- Simplex Trading added most to SPDR Gold Trust in Q3 2023, an estimated $68.6M increase.
- Simplex Trading's biggest Q3 2023 reduction was Netflix, cutting an estimated $27.1M.
- Simplex Trading fully exited Qualcomm in Q3 2023, selling an estimated $24.6M.
- Simplex Trading's ten largest holdings make up 44% of its $127B portfolio in Q3 2023.
- Simplex Trading opened 1,399 new positions and closed 1,719 in Q3 2023.
- Simplex Trading's portfolio value rose 4.5% quarter-over-quarter to $127B.
Based on Simplex Trading's 13F filing for Q3 2023, filed 1 Nov 2023.