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 | |
|---|---|---|---|---|---|---|
3901
ProShares Ultra Silver
AGQ
$1.12B
| $372K | ﹤0.01% |
9,201
-38,200
| -81% | -$1.42M |
|
3902
Digimarc Corp
DMRC
$147M
| $372K | ﹤0.01% |
13,857
-3,567
| -20% | -$105K |
|
3903
PUT
Kinsale Capital Group
KNSL
$8.42B
| $372K | ﹤0.01% |
800
-1,000
| -56% | -$442K |
|
3904
PUT
nCino
NCNO
$2.04B
| $372K | ﹤0.01% |
11,800
-5,100
| -30% | -$161K |
|
3905
PUT
Toro Company
TTC
$9.05B
| $372K | ﹤0.01% |
4,300
-5,700
| -57% | -$512K |
|
3906
ProShares Ultra Russell2000
UWM
$249M
| $372K | ﹤0.01% |
+8,675
| New | +$354K |
|
|
VNET
3907
VNET Group
VNET
$1.9B
| $372K | ﹤0.01% |
91,222
+43,372
| +91% | +$104K |
|
3908
CALL
Banco Bradesco
BBD
$38.4B
| $371K | ﹤0.01% |
139,800
+53,500
| +62% | +$137K |
|
3909
Corporacion America
CAAP
$4.26B
| $371K | ﹤0.01% |
+21,292
| New | +$345K |
|
|
LAZR
3910
PUT
DELISTED
Luminar Technologies
LAZR
| $371K | ﹤0.01% |
27,533
-9,267
| -25% | -$168K |
|
3911
CALL
Adeia
ADEA
$2.77B
| $370K | ﹤0.01% |
31,100
+14,800
| +91% | +$172K |
|
|
DESP
3912
CALL
DELISTED
Despegar.com
DESP
| $370K | ﹤0.01% |
29,900
+11,000
| +58% | +$132K |
|
3913
CALL
KB Financial Group
KB
$40.6B
| $370K | ﹤0.01% |
6,000
+900
| +18% | +$55.9K |
|
3914
CALL
MaxLinear
MXL
$5.38B
| $370K | ﹤0.01% |
25,600
+1,300
| +5% | +$20.6K |
|
3915
CALL
Owens Corning
OC
$11.6B
| $370K | ﹤0.01% |
2,100
-3,600
| -63% | -$606K |
|
3916
CALL
Sundial Growers
SNDL
$315M
| $370K | ﹤0.01% |
179,900
-186,500
| -51% | -$390K |
|
3917
CALL
Trinity Industries
TRN
$3.03B
| $369K | ﹤0.01% |
10,600
+4,400
| +71% | +$141K |
|
3918
PUT
A.O. Smith
AOS
$8.76B
| $368K | ﹤0.01% |
4,100
+700
| +21% | +$57.9K |
|
|
NOAH
3919
CALL
Noah Holdings
NOAH
$590M
| $368K | ﹤0.01% |
29,900
-80,100
| -73% | -$665K |
|
|
BBBY
3920
Bed Bath & Beyond
BBBY
$499M
| $367K | ﹤0.01% |
40,065
-18,338
| -31% | -$189K |
|
3921
Leidos
LDOS
$14.9B
| $367K | ﹤0.01% |
+2,252
| New | +$341K |
|
|
BLD
3922
PUT
DELISTED
TopBuild
BLD
| $366K | ﹤0.01% |
900
-600
| -40% | -$242K |
|
3923
Ouster
OUST
$2.25B
| $366K | ﹤0.01% |
58,153
+26,998
| +87% | +$257K |
|
3924
CALL
AudioEye
AEYE
$76.6M
| $365K | ﹤0.01% |
16,000
+9,400
| +142% | +$207K |
|
3925
CALL
Copa Holdings
CPA
$5.7B
| $365K | ﹤0.01% |
3,900
-6,800
| -64% | -$615K |
|
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.