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 | |
|---|---|---|---|---|---|---|
3001
Keysight
KEYS
$54.5B
| $916K | ﹤0.01% |
5,766
-3,866
| -40% | -$550K |
|
3002
PUT
Western Midstream Partners
WES
$19.6B
| $914K | ﹤0.01% |
23,900
-16,200
| -40% | -$638K |
|
3003
PUT
UWM Holdings
UWMC
$621M
| $913K | ﹤0.01% |
107,200
| – | – |
|
3004
CALL
Ero Copper
ERO
$2.71B
| $910K | ﹤0.01% |
40,900
-16,600
| -29% | -$339K |
|
3005
PUT
Root
ROOT
$917M
| $910K | ﹤0.01% |
24,100
+3,300
| +16% | +$170K |
|
3006
CALL
UGI
UGI
$8B
| $908K | ﹤0.01% |
36,300
-45,600
| -56% | -$1.1M |
|
3007
PUT
Canadian Imperial Bank of Commerce
CM
$107B
| $907K | ﹤0.01% |
14,800
-25,400
| -63% | -$1.38M |
|
3008
CALL
Allegro MicroSystems
ALGM
$8.58B
| $906K | ﹤0.01% |
38,900
-144,000
| -79% | -$3.62M |
|
3009
ProShares Ultra Bloomberg Crude Oil
UCO
$457M
| $906K | ﹤0.01% |
35,655
+15,368
| +76% | +$450K |
|
3010
CALL
Rubrik
RBRK
$15.1B
| $906K | ﹤0.01% |
28,200
-72,100
| -72% | -$2.39M |
|
3011
CALL
Anavex Life Sciences
AVXL
$222M
| $902K | ﹤0.01% |
158,900
+65,500
| +70% | +$378K |
|
3012
CALL
Rithm Capital
RITM
$5.09B
| $901K | ﹤0.01% |
79,400
-119,900
| -60% | -$1.36M |
|
3013
CALL
Arqit Quantum
ARQQ
$290M
| $900K | ﹤0.01% |
157,900
+149,216
| +1,718% | +$1.19M |
|
3014
PUT
Fabrinet
FN
$17.1B
| $898K | ﹤0.01% |
3,800
-1,800
| -32% | -$417K |
|
3015
CALL
Mission Produce
AVO
$1.1B
| $897K | ﹤0.01% |
70,000
+64,500
| +1,173% | +$715K |
|
3016
Academy Sports + Outdoors
ASO
$2.89B
| $896K | ﹤0.01% |
15,356
+4,394
| +40% | +$240K |
|
3017
Ormat Technologies
ORA
$6.11B
| $896K | ﹤0.01% |
11,653
-1,453
| -11% | -$108K |
|
|
CTLT
3018
CALL
DELISTED
CATALENT, INC.
CTLT
| $896K | ﹤0.01% |
14,800
-6,600
| -31% | -$391K |
|
3019
Goodyear
GT
$2.07B
| $892K | ﹤0.01% |
100,897
+70,529
| +232% | +$666K |
|
|
BZUN
3020
CALL
Baozun
BZUN
$144M
| $891K | ﹤0.01% |
249,100
-47,300
| -16% | -$117K |
|
3021
CALL
Pegasystems
PEGA
$4.41B
| $891K | ﹤0.01% |
24,400
-51,200
| -68% | -$1.69M |
|
3022
CALL
Assured Guaranty
AGO
$3.78B
| $890K | ﹤0.01% |
11,200
-25,200
| -69% | -$1.99M |
|
3023
Cipher Digital
CIFR
$9.47B
| $890K | ﹤0.01% |
230,207
-218,097
| -49% | -$919K |
|
3024
YieldMax COIN Option Income Strategy ETF
CONY
$321M
| $890K | ﹤0.01% |
6,647
+2,434
| +58% | +$395K |
|
3025
CALL
Live Oak Bancshares
LOB
$1.95B
| $890K | ﹤0.01% |
18,800
+7,800
| +71% | +$326K |
|
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.