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 | |
|---|---|---|---|---|---|---|
6076
CALL
Consensus Cloud Solutions
CCSI
$657M
| $40K | ﹤0.01% |
1,700
-300
| -15% | -$6.26K |
|
6077
CALL
Crexendo
CXDO
$221M
| $40K | ﹤0.01% |
8,700
+5,700
| +190% | +$24.7K |
|
6078
Design Therapeutics
DSGN
$788M
| $40K | ﹤0.01% |
7,602
+6,307
| +487% | +$29.7K |
|
|
EHAB
6079
DELISTED
Enhabit
EHAB
| $40K | ﹤0.01% |
5,187
+1,539
| +42% | +$13.4K |
|
6080
PUT
Element Solutions
ESI
$8.68B
| $40K | ﹤0.01% |
1,500
+700
| +88% | +$18.3K |
|
6081
CALL
Elbit Systems
ESLT
$36.8B
| $40K | ﹤0.01% |
200
-47,100
| -100% | -$9.03M |
|
6082
Future Fuel
FF
$218M
| $40K | ﹤0.01% |
7,074
-11,754
| -62% | -$65.3K |
|
|
LKFT
6083
PUT
Lakefront Biotherapeutics American Depositary Shares
LKFT
$1.81B
| $40K | ﹤0.01% |
1,400
-30,600
| -96% | -$833K |
|
6084
St. Joe Company
JOE
$3.59B
| $40K | ﹤0.01% |
697
-42,658
| -98% | -$2.5M |
|
6085
CALL
KNOT Offshore Partners
KNOP
$358M
| $40K | ﹤0.01% |
5,900
-400
| -6% | -$2.88K |
|
|
MITT
6086
CALL
TPG Mortgage Investment Trust
MITT
$225M
| $40K | ﹤0.01% |
5,400
| – | – |
|
6087
Martin Midstream Partners
MMLP
$93M
| $40K | ﹤0.01% |
11,062
+9,486
| +602% | +$34.1K |
|
6088
CALL
Outlook Therapeutics
OTLK
$194M
| $40K | ﹤0.01% |
7,500
+7,100
| +1,775% | +$52K |
|
|
PINC
6089
CALL
DELISTED
Premier
PINC
| $40K | ﹤0.01% |
+2,000
| New | +$39.7K |
|
6090
CarParts.com
PRTS
$42.4M
| $40K | ﹤0.01% |
4,480
+3,737
| +503% | +$35.3K |
|
6091
Relmada Therapeutics
RLMD
$562M
| $40K | ﹤0.01% |
12,506
-28,764
| -70% | -$93.2K |
|
|
SEMR
6092
PUT
DELISTED
Semrush
SEMR
| $40K | ﹤0.01% |
2,600
-4,400
| -63% | -$61.4K |
|
|
UROY
6093
PUT
Uranium Royalty Corp
UROY
$1.3B
| $40K | ﹤0.01% |
16,400
-75,700
| -82% | -$171K |
|
6094
Vanguard Industrials ETF
VIS
$8.04B
| $40K | ﹤0.01% |
156
+137
| +721% | +$33.5K |
|
|
VXRT
6095
DELISTED
Vaxart
VXRT
| $40K | ﹤0.01% |
48,242
-50,034
| -51% | -$38.2K |
|
|
ACR
6096
CALL
ACRES Commercial Realty
ACR
$125M
| $39K | ﹤0.01% |
2,500
-400
| -14% | -$5.97K |
|
6097
CALL
Bionano Genomics
BNGO
$12.2M
| $39K | ﹤0.01% |
1,452
+657
| +83% | +$20.4K |
|
6098
United States Brent Oil Fund
BNO
$770M
| $39K | ﹤0.01% |
1,378
-489
| -26% | -$14.8K |
|
6099
PUT
Pathward Financial
CASH
$1.85B
| $39K | ﹤0.01% |
+600
| New | +$38.6K |
|
6100
CALL
Cognyte Software
CGNT
$647M
| $39K | ﹤0.01% |
5,800
+2,700
| +87% | +$19.7K |
|
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.