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 | |
|---|---|---|---|---|---|---|
1351
PUT
MSCI
MSCI
$40B
| $6.12M | ﹤0.01% |
10,500
-27,800
| -73% | -$15.1M |
|
|
ECHO
1352
PUT
EchoStar
ECHO
$25.5B
| $6.12M | ﹤0.01% |
246,500
+27,300
| +12% | +$558K |
|
1353
Kroger
KR
$34.8B
| $6.11M | ﹤0.01% |
+106,624
| New | +$5.72M |
|
1354
CALL
Becton Dickinson
BDX
$43.1B
| $6.1M | ﹤0.01% |
25,300
-1,400
| -5% | -$328K |
|
1355
PUT
The GEO Group
GEO
$4.13B
| $6.09M | ﹤0.01% |
474,100
+234,000
| +97% | +$3.26M |
|
1356
PUT
Rocket Lab Corp
RKLB
$39.9B
| $6.08M | ﹤0.01% |
625,200
+177,200
| +40% | +$1.08M |
|
|
HCP
1357
CALL
DELISTED
HashiCorp, Inc. Class A Common Stock
HCP
| $6.04M | ﹤0.01% |
178,300
-74,800
| -30% | -$2.52M |
|
1358
PUT
SolarEdge
SEDG
$2.59B
| $6.03M | ﹤0.01% |
263,400
+19,600
| +8% | +$477K |
|
1359
CALL
WIX.com
WIX
$2.15B
| $6.03M | ﹤0.01% |
36,100
-35,800
| -50% | -$5.76M |
|
1360
PUT
FMC
FMC
$1.42B
| $6.03M | ﹤0.01% |
91,500
-97,300
| -52% | -$5.96M |
|
1361
CALL
Evolent Health
EVH
$475M
| $6.03M | ﹤0.01% |
213,300
+198,100
| +1,303% | +$5.11M |
|
1362
CALL
Fair Isaac
FICO
$28.7B
| $6.02M | ﹤0.01% |
3,100
-1,300
| -30% | -$2.22M |
|
1363
CALL
Capri Holdings
CPRI
$1.77B
| $6.02M | ﹤0.01% |
141,800
+8,900
| +7% | +$312K |
|
1364
CALL
IonQ
IONQ
$12.3B
| $6.01M | ﹤0.01% |
687,500
-24,000
| -3% | -$183K |
|
1365
CALL
ArcelorMittal
MT
$50.4B
| $5.99M | ﹤0.01% |
228,200
+57,400
| +34% | +$1.31M |
|
1366
PUT
Shake Shack
SHAK
$2.3B
| $5.99M | ﹤0.01% |
58,000
+10,200
| +21% | +$983K |
|
1367
PUT
Williams Companies
WMB
$90.5B
| $5.98M | ﹤0.01% |
131,100
-62,900
| -32% | -$2.76M |
|
1368
CALL
American Healthcare REIT
AHR
$11.1B
| $5.98M | ﹤0.01% |
229,300
+229,100
| +114,550% | +$4.46M |
|
1369
PUT
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$27B
| $5.98M | ﹤0.01% |
10,500
+3,100
| +42% | +$1.71M |
|
1370
CALL
Telus
TU
$16B
| $5.98M | ﹤0.01% |
356,400
+117,300
| +49% | +$1.89M |
|
|
TLN
1371
PUT
Talen Energy Corp
TLN
$17.2B
| $5.95M | ﹤0.01% |
+33,400
| New | +$4.71M |
|
1372
iShares MSCI India ETF
INDA
$6.71B
| $5.95M | ﹤0.01% |
101,706
+88,655
| +679% | +$5.05M |
|
1373
Teck Resources
TECK
$29.5B
| $5.93M | ﹤0.01% |
113,618
+65,143
| +134% | +$3.1M |
|
1374
BP
BP
$113B
| $5.93M | ﹤0.01% |
188,994
+140,087
| +286% | +$4.74M |
|
1375
Invitation Homes
INVH
$17.7B
| $5.93M | ﹤0.01% |
168,077
+59,618
| +55% | +$2.13M |
|
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.