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 | |
|---|---|---|---|---|---|---|
1626
CALL
Lightspeed Commerce
LSPD
$1.3B
| $4.22M | ﹤0.01% |
255,900
+172,900
| +208% | +$2.31M |
|
1627
CALL
Carbon Collective Climate Solutions US Equity ETF
CCSO
$45.3M
| $4.21M | ﹤0.01% |
211,000
+108,000
| +105% | +$2.07M |
|
1628
CALL
Hecla Mining
HL
$10.2B
| $4.21M | ﹤0.01% |
630,800
+130,100
| +26% | +$761K |
|
1629
CALL
Invesco
IVZ
$13.3B
| $4.21M | ﹤0.01% |
239,500
+110,300
| +85% | +$1.81M |
|
1630
PUT
Procore
PCOR
$6.46B
| $4.2M | ﹤0.01% |
68,000
+2,700
| +4% | +$166K |
|
1631
PUT
Baxter International
BAX
$11.6B
| $4.19M | ﹤0.01% |
110,400
-54,200
| -33% | -$1.99M |
|
1632
PUT
Jefferies Financial Group
JEF
$12.9B
| $4.19M | ﹤0.01% |
68,300
+45,700
| +202% | +$2.59M |
|
1633
PUT
Fox Class B
FOX
$20.7B
| $4.19M | ﹤0.01% |
99,000
-284,300
| -74% | -$10.2M |
|
1634
CALL
Dutch Bros
BROS
$8.78B
| $4.19M | ﹤0.01% |
130,800
-38,400
| -23% | -$1.35M |
|
1635
CALL
SL Green Realty
SLG
$3.88B
| $4.18M | ﹤0.01% |
60,100
-52,400
| -47% | -$3.36M |
|
|
VSTO
1636
CALL
DELISTED
Vista Outdoor Inc.
VSTO
| $4.18M | ﹤0.01% |
106,600
+51,400
| +93% | +$1.99M |
|
1637
PUT
StoneCo
STNE
$2.62B
| $4.17M | ﹤0.01% |
370,800
+184,400
| +99% | +$2.35M |
|
|
FYBR
1638
PUT
DELISTED
Frontier Communications
FYBR
| $4.17M | ﹤0.01% |
117,400
-48,200
| -29% | -$1.45M |
|
1639
CALL
ChargePoint
CHPT
$133M
| $4.17M | ﹤0.01% |
152,100
+43,175
| +40% | +$1.5M |
|
1640
PUT
Genpact
G
$5.3B
| $4.16M | ﹤0.01% |
106,200
+78,400
| +282% | +$2.84M |
|
1641
CALL
Noble Corp
NE
$6.9B
| $4.16M | ﹤0.01% |
115,200
+67,700
| +143% | +$2.73M |
|
1642
PUT
Conagra Brands
CAG
$7.07B
| $4.16M | ﹤0.01% |
127,800
+14,200
| +13% | +$435K |
|
1643
CALL
Sprott Junior Uranium Miners ETF
URNJ
$306M
| $4.14M | ﹤0.01% |
96,800
+21,400
| +28% | +$448K |
|
1644
CALL
AdaptHealth
AHCO
$1.46B
| $4.13M | ﹤0.01% |
368,200
+37,400
| +11% | +$397K |
|
1645
CALL
Atmus Filtration Technologies
ATMU
$4.37B
| $4.13M | ﹤0.01% |
110,000
+91,000
| +479% | +$2.97M |
|
1646
Vale
VALE
$62.9B
| $4.13M | ﹤0.01% |
353,406
-375,143
| -51% | -$4.02M |
|
1647
PUT
Banc of California
BANC
$3.28B
| $4.12M | ﹤0.01% |
280,000
+1,700
| +0.6% | +$23.6K |
|
1648
CALL
Plains GP Holdings
PAGP
$5.23B
| $4.12M | ﹤0.01% |
222,800
-26,900
| -11% | -$511K |
|
1649
American Eagle Outfitters
AEO
$2.85B
| $4.11M | ﹤0.01% |
183,590
-40,131
| -18% | -$828K |
|
1650
PUT
Saia
SAIA
$11.3B
| $4.11M | ﹤0.01% |
9,400
-22,000
| -70% | -$9.32M |
|
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.