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 | |
|---|---|---|---|---|---|---|
2951
Parker-Hannifin
PH
$125B
| $963K | ﹤0.01% |
1,525
-823
| -35% | -$468K |
|
2952
PUT
Structure Therapeutics
GPCR
$3.49B
| $961K | ﹤0.01% |
21,900
-26,600
| -55% | -$1.03M |
|
2953
CALL
Procept Biorobotics
PRCT
$950M
| $961K | ﹤0.01% |
12,000
+7,500
| +167% | +$533K |
|
2954
Seadrill
SDRL
$2.81B
| $960K | ﹤0.01% |
24,178
+20,464
| +551% | +$941K |
|
2955
CALL
Petco
WOOF
$745M
| $959K | ﹤0.01% |
210,900
+134,100
| +175% | +$455K |
|
2956
CALL
Boise Cascade
BCC
$2.74B
| $958K | ﹤0.01% |
6,800
+800
| +13% | +$104K |
|
2957
Vestis
VSTS
$2.06B
| $958K | ﹤0.01% |
64,340
-72,624
| -53% | -$975K |
|
|
DEA
2958
CALL
Easterly Government Properties
DEA
$1.18B
| $957K | ﹤0.01% |
28,200
+17,960
| +175% | +$602K |
|
2959
PUT
Owens Corning
OC
$11.5B
| $953K | ﹤0.01% |
5,400
+700
| +15% | +$118K |
|
2960
PUT
Brookfield Infrastructure
BIPC
$5.11B
| $951K | ﹤0.01% |
21,900
-1,300
| -6% | -$50.6K |
|
2961
PUT
Copa Holdings
CPA
$5.56B
| $947K | ﹤0.01% |
10,100
-22,900
| -69% | -$2.07M |
|
2962
CALL
Larimar Therapeutics
LRMR
$416M
| $943K | ﹤0.01% |
144,100
-7,600
| -5% | -$61.1K |
|
2963
CALL
Opko Health
OPK
$921M
| $943K | ﹤0.01% |
633,500
+120,400
| +23% | +$179K |
|
2964
Virtu Financial
VIRT
$5.2B
| $942K | ﹤0.01% |
30,933
-22,843
| -42% | -$651K |
|
|
AKRO
2965
CALL
DELISTED
Akero Therapeutics
AKRO
| $941K | ﹤0.01% |
32,800
-9,700
| -23% | -$253K |
|
2966
CALL
Core Laboratories
CLB
$538M
| $941K | ﹤0.01% |
50,800
-400
| -0.8% | -$8.03K |
|
|
JMIA
2967
Jumia Technologies
JMIA
$726M
| $941K | ﹤0.01% |
176,356
-42,895
| -20% | -$317K |
|
|
HIVE
2968
CALL
HIVE Digital Technologies
HIVE
$792M
| $940K | ﹤0.01% |
300,500
-22,500
| -7% | -$73.4K |
|
|
CRON
2969
CALL
Cronos Group
CRON
$1.05B
| $939K | ﹤0.01% |
428,900
-245,200
| -36% | -$561K |
|
2970
Cloudflare
NET
$93B
| $938K | ﹤0.01% |
+11,605
| New | +$933K |
|
2971
CALL
NextDecade
NEXT
$1.85B
| $937K | ﹤0.01% |
199,000
+150,900
| +314% | +$913K |
|
2972
CALL
Silicon Laboratories
SLAB
$7.15B
| $936K | ﹤0.01% |
8,100
-5,200
| -39% | -$580K |
|
|
CVSA
2973
CALL
Covista Inc
CVSA
$3.94B
| $935K | ﹤0.01% |
12,400
-2,000
| -14% | -$147K |
|
2974
PUT
Flowserve
FLS
$9.25B
| $935K | ﹤0.01% |
18,100
+16,700
| +1,193% | +$804K |
|
2975
HSBC
HSBC
$355B
| $935K | ﹤0.01% |
20,693
+9,931
| +92% | +$430K |
|
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.