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 | |
|---|---|---|---|---|---|---|
801
CALL
Ferrari
RACE
$63.2B
| $14.5M | 0.01% |
30,900
-800
| -3% | -$359K |
|
802
iShares MSCI EAFE ETF
EFA
$76.1B
| $14.5M | 0.01% |
+173,650
| New | +$14M |
|
|
P
803
CALL
Everpure Inc
P
$25B
| $14.5M | 0.01% |
288,900
+8,800
| +3% | +$497K |
|
804
CALL
Toast
TOST
$16.5B
| $14.5M | 0.01% |
511,400
+1,000
| +0.2% | +$25.3K |
|
805
PUT
Aflac
AFL
$63.3B
| $14.5M | 0.01% |
129,300
+74,900
| +138% | +$7.61M |
|
806
PUT
Stanley Black & Decker
SWK
$13.6B
| $14.4M | 0.01% |
131,200
+29,900
| +30% | +$2.87M |
|
|
WBA
807
CALL
DELISTED
Walgreens Boots Alliance
WBA
| $14.4M | 0.01% |
1,611,200
+553,500
| +52% | +$5.7M |
|
|
FISV
808
PUT
Fiserv Inc
FISV
$26.6B
| $14.4M | 0.01% |
80,100
-8,500
| -10% | -$1.4M |
|
809
PUT
Okta
OKTA
$23.7B
| $14.4M | 0.01% |
193,100
-8,200
| -4% | -$717K |
|
810
PUT
Iris Energy
IREN
$14.5B
| $14.3M | 0.01% |
1,697,400
+81,400
| +5% | +$748K |
|
|
GAP
811
PUT
The Gap Inc
GAP
$6.8B
| $14.3M | 0.01% |
647,300
-502,400
| -44% | -$11.2M |
|
812
CALL
KLA
KLAC
$286B
| $14.2M | 0.01% |
184,000
-61,000
| -25% | -$4.79M |
|
813
ASML
ASML
$693B
| $14.2M | 0.01% |
17,098
-4,304
| -20% | -$3.85M |
|
814
CALL
Navios Maritime Partners
NMM
$2.18B
| $14.2M | 0.01% |
227,200
+118,400
| +109% | +$6.08M |
|
815
PUT
Teck Resources
TECK
$29.3B
| $14.2M | 0.01% |
272,100
+134,700
| +98% | +$6.41M |
|
816
PUT
DuPont de Nemours
DD
$18.6B
| $14.2M | 0.01% |
250,074
+130,733
| +110% | +$13.3M |
|
817
CALL
T. Rowe Price
TROW
$24.6B
| $14.2M | 0.01% |
130,300
+35,200
| +37% | +$3.86M |
|
818
PUT
SL Green Realty
SLG
$3.81B
| $14.2M | 0.01% |
203,800
-58,200
| -22% | -$3.74M |
|
819
PUT
Yum! Brands
YUM
$40.6B
| $14.1M | 0.01% |
101,100
+68,200
| +207% | +$9.07M |
|
820
CALL
Rocket Lab Corp
RKLB
$43.7B
| $14.1M | 0.01% |
1,451,400
+908,000
| +167% | +$5.51M |
|
821
CALL
Trane Technologies
TT
$106B
| $14.1M | 0.01% |
36,300
+10,800
| +42% | +$3.75M |
|
822
PUT
Electronic Arts
EA
$52.4B
| $14.1M | 0.01% |
98,200
-38,600
| -28% | -$5.6M |
|
|
TYNS
823
PUT
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $14.1M | 0.01% |
108,300
-38,600
| -26% | -$5.01M |
|
824
PUT
Aon
AON
$76B
| $14M | 0.01% |
40,600
+26,400
| +186% | +$8.64M |
|
825
PUT
Insmed
INSM
$23.3B
| $14M | 0.01% |
191,900
-143,200
| -43% | -$10.6M |
|
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.