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 | |
|---|---|---|---|---|---|---|
2601
PUT
Modine Manufacturing
MOD
$12.8B
| $1.38M | ﹤0.01% |
10,400
-19,800
| -66% | -$2.19M |
|
2602
PUT
Sysco
SYY
$39.7B
| $1.38M | ﹤0.01% |
17,700
-67,600
| -79% | -$5.08M |
|
2603
CALL
Eagle Materials
EXP
$6.6B
| $1.38M | ﹤0.01% |
4,800
-3,700
| -44% | -$925K |
|
2604
CALL
Middleby
MIDD
$6.05B
| $1.38M | ﹤0.01% |
9,900
+3,700
| +60% | +$497K |
|
|
ORC
2605
PUT
Orchid Island Capital
ORC
$1.31B
| $1.38M | ﹤0.01% |
167,500
+154,200
| +1,159% | +$1.27M |
|
2606
Liberty Global Class A
LBTYA
$3.31B
| $1.37M | ﹤0.01% |
65,089
-13,066
| -17% | -$252K |
|
2607
CALL
DXC Technology
DXC
$1.63B
| $1.37M | ﹤0.01% |
66,200
+41,700
| +170% | +$830K |
|
2608
Immunovant
IMVT
$8.09B
| $1.37M | ﹤0.01% |
48,191
-8,770
| -15% | -$259K |
|
|
OPRA
2609
CALL
Opera Ltd
OPRA
$1.65B
| $1.37M | ﹤0.01% |
88,900
-21,800
| -20% | -$293K |
|
2610
CALL
Algoma Steel
ASTL
$455M
| $1.37M | ﹤0.01% |
134,100
-79,100
| -37% | -$729K |
|
2611
Tencent Music
TME
$14.5B
| $1.37M | ﹤0.01% |
+113,839
| New | +$1.39M |
|
2612
CALL
American Eagle Outfitters
AEO
$2.85B
| $1.37M | ﹤0.01% |
61,200
+28,700
| +88% | +$592K |
|
2613
First Horizon
FHN
$12.1B
| $1.37M | ﹤0.01% |
+88,153
| New | +$1.4M |
|
2614
PUT
Ericsson
ERIC
$30.7B
| $1.37M | ﹤0.01% |
180,600
+4,800
| +3% | +$33.6K |
|
2615
VanEck Agribusiness ETF
MOO
$989M
| $1.37M | ﹤0.01% |
18,096
-2,247
| -11% | -$161K |
|
2616
Tradr 1.25X NVDA Bear Daily ETF
NVDS
$16.5M
| $1.37M | ﹤0.01% |
12,938
+11,542
| +827% | +$1.38M |
|
2617
CALL
Roivant Sciences
ROIV
$25.2B
| $1.36M | ﹤0.01% |
118,300
-93,200
| -44% | -$1.06M |
|
2618
PUT
Ameriprise Financial
AMP
$46.8B
| $1.36M | ﹤0.01% |
2,900
+2,500
| +625% | +$1.08M |
|
2619
PUT
Dover
DOV
$27.2B
| $1.36M | ﹤0.01% |
7,100
-700
| -9% | -$128K |
|
2620
PUT
Brookfield
BN
$102B
| $1.36M | ﹤0.01% |
38,400
-8,250
| -18% | -$260K |
|
2621
Crown Castle
CCI
$32.7B
| $1.36M | ﹤0.01% |
+11,471
| New | +$1.26M |
|
2622
CALL
QuinStreet
QNST
$870M
| $1.36M | ﹤0.01% |
71,100
+67,900
| +2,122% | +$1.24M |
|
2623
TC Energy
TRP
$73.5B
| $1.36M | ﹤0.01% |
28,593
+11,582
| +68% | +$503K |
|
2624
PUT
Xcel Energy
XEL
$51B
| $1.36M | ﹤0.01% |
20,800
-100,000
| -83% | -$5.93M |
|
|
GOLD
2625
CALL
Gold.com Inc
GOLD
$1.14B
| $1.35M | ﹤0.01% |
30,700
+6,300
| +26% | +$241K |
|
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.