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 | |
|---|---|---|---|---|---|---|
4051
CALL
B&G Foods
BGS
$297M
| $322K | ﹤0.01% |
36,300
-15,200
| -30% | -$129K |
|
4052
CALL
Driven Brands
DRVN
$2.47B
| $322K | ﹤0.01% |
22,600
+1,700
| +8% | +$23.3K |
|
4053
CALL
Evergy
EVRG
$19.7B
| $322K | ﹤0.01% |
5,200
-12,300
| -70% | -$716K |
|
4054
PUT
Tiptree Inc
TIPT
$678M
| $322K | ﹤0.01% |
+16,500
| New | +$306K |
|
4055
CALL
Cushman & Wakefield Ltd
CWK
$3.2B
| $321K | ﹤0.01% |
23,600
-12,900
| -35% | -$163K |
|
|
QXO
4056
CALL
QXO Inc
QXO
$14.8B
| $321K | ﹤0.01% |
+20,400
| New | +$595K |
|
4057
CALL
EXL Service
EXLS
$4.66B
| $320K | ﹤0.01% |
8,400
-5,100
| -38% | -$178K |
|
4058
CALL
HighPeak Energy
HPK
$811M
| $320K | ﹤0.01% |
23,100
-3,900
| -14% | -$59.5K |
|
4059
MINISO
MNSO
$3.73B
| $320K | ﹤0.01% |
18,255
+7,651
| +72% | +$126K |
|
4060
CALL
Oshkosh
OSK
$9.51B
| $320K | ﹤0.01% |
3,200
-3,300
| -51% | -$344K |
|
|
4061
PUT
Oshkosh
OSK
$9.51B
| $320K | ﹤0.01% |
3,200
-1,900
| -37% | -$198K |
|
|
SAFE
4062
PUT
Safehold
SAFE
$1.19B
| $320K | ﹤0.01% |
12,200
-15,800
| -56% | -$373K |
|
4063
PUT
Banco Bradesco
BBD
$38.3B
| $319K | ﹤0.01% |
120,300
-4,200
| -3% | -$10.8K |
|
4064
PUT
Globalstar
GSAT
$10.2B
| $319K | ﹤0.01% |
17,200
+6,353
| +59% | +$118K |
|
4065
Littelfuse
LFUS
$9.91B
| $319K | ﹤0.01% |
+1,206
| New | +$311K |
|
4066
CALL
Fortis
FTS
$29.7B
| $318K | ﹤0.01% |
7,000
+6,800
| +3,400% | +$291K |
|
4067
CALL
Rigel Pharmaceuticals
RIGL
$712M
| $318K | ﹤0.01% |
19,700
-13,400
| -40% | -$158K |
|
4068
PUT
Vera Therapeutics
VERA
$2.39B
| $318K | ﹤0.01% |
7,200
+1,100
| +18% | +$41.7K |
|
4069
CALL
Medifast
MED
$108M
| $317K | ﹤0.01% |
16,600
-11,300
| -41% | -$218K |
|
|
EXK
4070
Endeavour Silver
EXK
$2.29B
| $316K | ﹤0.01% |
80,405
+27,417
| +52% | +$101K |
|
4071
RXO
RXO
$3.73B
| $316K | ﹤0.01% |
+11,294
| New | +$319K |
|
4072
CALL
Element Solutions
ESI
$8.89B
| $315K | ﹤0.01% |
11,600
-7,400
| -39% | -$194K |
|
4073
PUT
NextNav
NN
$1.84B
| $315K | ﹤0.01% |
42,100
+8,300
| +25% | +$64K |
|
4074
PUT
C4 Therapeutics
CCCC
$393M
| $314K | ﹤0.01% |
55,200
-31,400
| -36% | -$189K |
|
4075
PUT
Nuvation Bio
NUVB
$2.33B
| $314K | ﹤0.01% |
137,300
+136,800
| +27,360% | +$417K |
|
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.