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 | |
|---|---|---|---|---|---|---|
4251
CALL
PSQ Holdings
PSQH
$12.4M
| $217K | ﹤0.01% |
1,600
+860
| +116% | +$153K |
|
4252
STAG Industrial
STAG
$7.44B
| $217K | ﹤0.01% |
6,316
+3,186
| +102% | +$116K |
|
|
RVNC
4253
DELISTED
Revance Therapeutics, Inc.
RVNC
| $217K | ﹤0.01% |
18,980
+2,615
| +16% | +$50.3K |
|
|
AIRC
4254
CALL
DELISTED
Apartment Income REIT Corp.
AIRC
| $217K | ﹤0.01% |
7,100
+100
| +1% | +$3.4K |
|
4255
PUT
Eastern Bankshares
EBC
$5.27B
| $216K | ﹤0.01% |
17,300
+5,500
| +47% | +$74K |
|
|
EXK
4256
CALL
Endeavour Silver
EXK
$2.24B
| $216K | ﹤0.01% |
89,200
+35,800
| +67% | +$106K |
|
4257
CALL
Gibraltar Industries
ROCK
$1.28B
| $216K | ﹤0.01% |
3,200
+3,100
| +3,100% | +$212K |
|
4258
CALL
Alphatec Holdings
ATEC
$1.48B
| $215K | ﹤0.01% |
16,600
-12,700
| -43% | -$199K |
|
4259
CALL
Calix
CALX
$2.24B
| $215K | ﹤0.01% |
4,700
-1,200
| -20% | -$54.3K |
|
4260
CALL
Imperial Oil
IMO
$62.3B
| $215K | ﹤0.01% |
3,500
-1,500
| -30% | -$82.2K |
|
|
MAPS
4261
CALL
DELISTED
WM TECHNOLOGY INC A
MAPS
| $215K | ﹤0.01% |
163,400
+16,000
| +11% | +$19.3K |
|
4262
Open Text
OTEX
$6.28B
| $215K | ﹤0.01% |
6,133
+5,301
| +637% | +$208K |
|
4263
CALL
Quest Resource Holding
QRHC
$27.6M
| $215K | ﹤0.01% |
29,100
+7,700
| +36% | +$55.6K |
|
4264
PUT
United Bankshares
UBSI
$6.69B
| $215K | ﹤0.01% |
7,800
+2,400
| +44% | +$72.3K |
|
|
ONC
4265
CALL
BeOne Medicines Ltd
ONC
$33.9B
| $215K | ﹤0.01% |
1,200
-8,500
| -88% | -$1.68M |
|
|
MTTR
4266
DELISTED
Matterport, Inc. Class A Common Stock
MTTR
| $215K | ﹤0.01% |
99,341
-48,570
| -33% | -$136K |
|
4267
PUT
American Resources Corp
AREC
$183M
| $214K | ﹤0.01% |
128,500
+39,800
| +45% | +$63.6K |
|
4268
CALL
Lifecore Biomedical
LFCR
$162M
| $214K | ﹤0.01% |
28,400
-3,700
| -12% | -$33.8K |
|
4269
OneWater Marine
ONEW
$211M
| $214K | ﹤0.01% |
+8,354
| New | +$250K |
|
4270
PUT
Qiagen
QGEN
$8.62B
| $214K | ﹤0.01% |
4,998
+4,809
| +2,544% | +$224K |
|
|
RDUS
4271
PUT
DELISTED
Radius Recycling
RDUS
| $214K | ﹤0.01% |
7,700
+5,800
| +305% | +$179K |
|
4272
CALL
America Movil
AMX
$74.6B
| $213K | ﹤0.01% |
12,300
+10,500
| +583% | +$205K |
|
4273
CALL
Brookfield Renewable
BEP
$9.6B
| $213K | ﹤0.01% |
9,800
-7,600
| -44% | -$205K |
|
4274
PUT
Blackstone Secured Lending
BXSL
$5.36B
| $213K | ﹤0.01% |
7,800
-11,700
| -60% | -$324K |
|
|
4275
CALL
Eastern Bankshares
EBC
$5.27B
| $213K | ﹤0.01% |
17,000
+1,100
| +7% | +$14.8K |
|
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.