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 | |
|---|---|---|---|---|---|---|
1601
Chubb
CB
$140B
| $4.37M | ﹤0.01% |
+15,142
| New | +$4.15M |
|
1602
Insmed
INSM
$23.2B
| $4.35M | ﹤0.01% |
+59,561
| New | +$4.4M |
|
1603
CALL
Frontdoor
FTDR
$5.02B
| $4.34M | ﹤0.01% |
90,500
+44,100
| +95% | +$1.91M |
|
1604
CALL
NetEase
NTES
$76.5B
| $4.34M | ﹤0.01% |
46,400
-100
| -0.2% | -$8.73K |
|
1605
CALL
argenx
ARGX
$57.4B
| $4.34M | ﹤0.01% |
8,000
-8,900
| -53% | -$4.5M |
|
1606
PUT
QuantumScape Corp
QS
$3B
| $4.34M | ﹤0.01% |
754,100
-51,600
| -6% | -$318K |
|
|
NOVA
1607
PUT
DELISTED
Sunnova Energy
NOVA
| $4.33M | ﹤0.01% |
445,100
-4,100
| -0.9% | -$36.2K |
|
1608
PUT
TeraWulf
WULF
$9.15B
| $4.32M | ﹤0.01% |
922,600
+576,800
| +167% | +$2.62M |
|
1609
CALL
Eos Energy Enterprises
EOSE
$1.23B
| $4.31M | ﹤0.01% |
1,450,900
+182,200
| +14% | +$386K |
|
1610
PUT
Timken Company
TKR
$9.82B
| $4.31M | ﹤0.01% |
51,100
+50,700
| +12,675% | +$4.17M |
|
1611
PUT
Zeta Global
ZETA
$4.77B
| $4.31M | ﹤0.01% |
144,400
+124,800
| +637% | +$2.94M |
|
1612
Agnico Eagle Mines
AEM
$72.6B
| $4.3M | ﹤0.01% |
+53,430
| New | +$4.14M |
|
1613
CALL
Plug Power
PLUG
$2.92B
| $4.3M | ﹤0.01% |
1,902,300
+237,800
| +14% | +$533K |
|
|
FISV
1614
Fiserv Inc
FISV
$27.2B
| $4.29M | ﹤0.01% |
23,865
+22,442
| +1,577% | +$3.7M |
|
1615
Apollo Global Management
APO
$70.7B
| $4.29M | ﹤0.01% |
+34,318
| New | +$3.96M |
|
1616
PUT
Exelixis
EXEL
$13.9B
| $4.29M | ﹤0.01% |
165,200
+134,100
| +431% | +$3.33M |
|
1617
PUT
Bumble
BMBL
$367M
| $4.28M | ﹤0.01% |
671,600
+403,100
| +150% | +$3.03M |
|
1618
CALL
Kinsale Capital Group
KNSL
$8.05B
| $4.28M | ﹤0.01% |
9,200
+4,000
| +77% | +$1.77M |
|
1619
CALL
Hyatt Hotels
H
$17.6B
| $4.28M | ﹤0.01% |
28,100
-10,000
| -26% | -$1.48M |
|
1620
CALL
Ares Management
ARES
$28.5B
| $4.27M | ﹤0.01% |
27,400
+7,000
| +34% | +$1.02M |
|
1621
Live Nation Entertainment
LYV
$41.2B
| $4.27M | ﹤0.01% |
39,005
+30,179
| +342% | +$2.92M |
|
1622
CALL
Hartford Financial Services
HIG
$38.5B
| $4.26M | ﹤0.01% |
36,200
+1,700
| +5% | +$186K |
|
1623
Chewy
CHWY
$8.54B
| $4.25M | ﹤0.01% |
145,224
+71,834
| +98% | +$1.92M |
|
1624
CALL
Tronox
TROX
$995M
| $4.25M | ﹤0.01% |
290,200
-2,300
| -0.8% | -$32.8K |
|
1625
PUT
Harley-Davidson
HOG
$2.68B
| $4.22M | ﹤0.01% |
109,600
-5,000
| -4% | -$181K |
|
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.