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 | |
|---|---|---|---|---|---|---|
4651
Popular Inc
BPOP
$11B
| $151K | ﹤0.01% |
+2,410
| New | +$159K |
|
4652
Imperial Oil
IMO
$62.3B
| $151K | ﹤0.01% |
+2,453
| New | +$134K |
|
|
LX
4653
CALL
LexinFintech Holdings
LX
$246M
| $151K | ﹤0.01% |
68,400
+27,600
| +68% | +$66.6K |
|
4654
PUT
RPM International
RPM
$13.8B
| $151K | ﹤0.01% |
1,600
-14,200
| -90% | -$1.38M |
|
|
SOL
4655
PUT
DELISTED
Emeren Group
SOL
| $151K | ﹤0.01% |
49,300
+16,700
| +51% | +$58K |
|
4656
CALL
Upland Software
UPLD
$13.3M
| $151K | ﹤0.01% |
3,280
-2,660
| -45% | -$97K |
|
4657
Agree Realty
ADC
$9.66B
| $150K | ﹤0.01% |
2,727
+2,624
| +2,548% | +$164K |
|
4658
Covenant Logistics
CVLG
$1.04B
| $150K | ﹤0.01% |
+6,876
| New | +$167K |
|
|
SLCA
4659
CALL
DELISTED
U.S. SILICA HOLDINGS, INC.
SLCA
| $150K | ﹤0.01% |
10,700
+5,000
| +88% | +$65.4K |
|
|
AEL
4660
CALL
DELISTED
American Equity Investment Life Holding Company
AEL
| $150K | ﹤0.01% |
2,800
+400
| +17% | +$21.4K |
|
4661
PUT
AbCellera Biologics
ABCL
$1.65B
| $149K | ﹤0.01% |
32,600
-3,200
| -9% | -$19.5K |
|
4662
Vaalco Energy
EGY
$562M
| $149K | ﹤0.01% |
34,032
-26,027
| -43% | -$113K |
|
4663
Fiverr
FVRR
$331M
| $149K | ﹤0.01% |
6,094
-9,161
| -60% | -$258K |
|
|
LSEA
4664
PUT
DELISTED
Landsea Homes
LSEA
| $149K | ﹤0.01% |
+16,600
| New | +$166K |
|
4665
CALL
Life Time Group Holdings
LTH
$10.2B
| $149K | ﹤0.01% |
9,800
+4,800
| +96% | +$84.6K |
|
|
NNDM
4666
Nano Dimension
NNDM
$314M
| $149K | ﹤0.01% |
54,965
-39,787
| -42% | -$116K |
|
4667
CALL
Sumitomo Mitsui Financial
SMFG
$159B
| $149K | ﹤0.01% |
+15,200
| New | +$141K |
|
|
WPRT
4668
CALL
Westport Fuel Systems
WPRT
$31.9M
| $149K | ﹤0.01% |
24,600
-1,100
| -4% | -$8.98K |
|
|
DOOR
4669
CALL
DELISTED
MASONITE INTERNATIONAL CORP
DOOR
| $149K | ﹤0.01% |
1,600
+1,400
| +700% | +$141K |
|
4670
CenterPoint Energy
CNP
$28.3B
| $148K | ﹤0.01% |
5,518
-35,152
| -86% | -$1.02M |
|
4671
PUT
Xponential Fitness
XPOF
$286M
| $148K | ﹤0.01% |
9,600
-11,100
| -54% | -$218K |
|
|
PDCO
4672
CALL
DELISTED
Patterson Companies, Inc.
PDCO
| $148K | ﹤0.01% |
5,000
-1,000
| -17% | -$31.7K |
|
4673
PUT
Establishment Labs
ESTA
$2.71B
| $147K | ﹤0.01% |
3,000
+2,300
| +329% | +$137K |
|
4674
CALL
Garrett Motion
GTX
$5.37B
| $147K | ﹤0.01% |
18,700
-8,000
| -30% | -$61.6K |
|
4675
Hess Midstream
HESM
$5.19B
| $147K | ﹤0.01% |
+5,064
| New | +$153K |
|
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.