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 | |
|---|---|---|---|---|---|---|
3976
PUT
Blink Charging
BLNK
$74.1M
| $348K | ﹤0.01% |
202,400
+104,700
| +107% | +$250K |
|
|
MESO
3977
PUT
Mesoblast
MESO
$1.87B
| $348K | ﹤0.01% |
42,700
-12,600
| -23% | -$85.5K |
|
3978
CALL
abrdn Physical Silver Shares ETF
SIVR
$3.97B
| $348K | ﹤0.01% |
11,700
-23,700
| -67% | -$667K |
|
3979
Copa Holdings
CPA
$5.71B
| $347K | ﹤0.01% |
+3,698
| New | +$334K |
|
3980
CALL
Crinetics Pharmaceuticals
CRNX
$8.88B
| $347K | ﹤0.01% |
6,800
-10,100
| -60% | -$521K |
|
|
EXK
3981
PUT
Endeavour Silver
EXK
$2.29B
| $347K | ﹤0.01% |
88,300
+23,500
| +36% | +$86.4K |
|
|
NUVL
3982
CALL
DELISTED
Nuvalent
NUVL
| $347K | ﹤0.01% |
3,400
+700
| +26% | +$58.1K |
|
3983
CALL
Rayonier
RYN
$6.64B
| $347K | ﹤0.01% |
11,904
-9,700
| -45% | -$265K |
|
3984
CALL
Ambev
ABEV
$48.4B
| $346K | ﹤0.01% |
141,900
+74,400
| +110% | +$167K |
|
3985
MBIA
MBI
$278M
| $346K | ﹤0.01% |
96,993
+84,862
| +700% | +$351K |
|
3986
PUT
Rentokil
RTO
$14.5B
| $346K | ﹤0.01% |
13,900
-1,400
| -9% | -$41.5K |
|
3987
CALL
SelectQuote
SLQT
$132M
| $346K | ﹤0.01% |
159,600
+152,700
| +2,213% | +$501K |
|
3988
Petco
WOOF
$811M
| $346K | ﹤0.01% |
76,214
-95,336
| -56% | -$324K |
|
|
GRAL
3989
PUT
GRAIL Inc
GRAL
$2.76B
| $346K | ﹤0.01% |
+25,200
| New | +$382K |
|
|
DCH
3990
CALL
Dauch Corp
DCH
$1.33B
| $345K | ﹤0.01% |
55,900
+51,000
| +1,041% | +$332K |
|
3991
Teekay Tankers
TNK
$2.66B
| $345K | ﹤0.01% |
+5,924
| New | +$349K |
|
|
AL
3992
PUT
DELISTED
Air Lease Corp
AL
| $344K | ﹤0.01% |
7,600
-4,200
| -36% | -$192K |
|
3993
CALL
Corpay
CPAY
$25.1B
| $344K | ﹤0.01% |
1,100
-3,900
| -78% | -$1.15M |
|
|
ARC
3994
PUT
DELISTED
ARC Document Solutions, Inc.
ARC
| $343K | ﹤0.01% |
+101,500
| New | +$318K |
|
3995
PUT
ABM Industries
ABM
$2.88B
| $342K | ﹤0.01% |
6,500
+5,500
| +550% | +$291K |
|
3996
Castle Biosciences
CSTL
$725M
| $342K | ﹤0.01% |
+12,004
| New | +$306K |
|
|
AIOT
3997
PowerFleet Inc
AIOT
$525M
| $342K | ﹤0.01% |
68,487
-130,518
| -66% | -$620K |
|
3998
PUT
Atmus Filtration Technologies
ATMU
$4.45B
| $341K | ﹤0.01% |
9,100
-7,700
| -46% | -$251K |
|
3999
Axalta
AXTA
$7.58B
| $341K | ﹤0.01% |
+9,448
| New | +$332K |
|
4000
PUT
Vitesse Energy
VTS
$626M
| $341K | ﹤0.01% |
14,200
-6,400
| -31% | -$158K |
|
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.