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 | |
|---|---|---|---|---|---|---|
3876
PUT
Astrana Health
ASTH
$1.85B
| $382K | ﹤0.01% |
6,600
+3,700
| +128% | +$182K |
|
3877
CALL
Globalstar
GSAT
$10.2B
| $381K | ﹤0.01% |
20,520
-4,693
| -19% | -$86.8K |
|
3878
Tredegar Corp
TG
$266M
| $381K | ﹤0.01% |
+52,264
| New | +$305K |
|
3879
CALL
Pinnacle West Capital
PNW
$12.9B
| $380K | ﹤0.01% |
4,300
+1,100
| +34% | +$93.9K |
|
3880
PUT
Global X S&P 500 Tail Risk ETF
XTR
$4.77M
| $380K | ﹤0.01% |
6,800
-39,300
| -85% | -$1.23M |
|
3881
PUT
PTC
PTC
$15B
| $379K | ﹤0.01% |
2,100
-100
| -5% | -$17.6K |
|
3882
CALL
Akebia Therapeutics
AKBA
$333M
| $378K | ﹤0.01% |
286,900
-42,900
| -13% | -$57.3K |
|
3883
PUT
Denison Mines
DNN
$2.51B
| $378K | ﹤0.01% |
206,900
-54,300
| -21% | -$95.4K |
|
3884
CALL
IAMGOLD
IAG
$8.24B
| $378K | ﹤0.01% |
72,400
-13,500
| -16% | -$62.3K |
|
3885
CALL
PennantPark Floating Rate Capital
PFLT
$705M
| $378K | ﹤0.01% |
32,700
+26,800
| +454% | +$304K |
|
3886
PUT
Xylem
XYL
$29.8B
| $378K | ﹤0.01% |
2,800
-4,000
| -59% | -$535K |
|
3887
Allstate
ALL
$69.5B
| $377K | ﹤0.01% |
+1,992
| New | +$354K |
|
3888
PUT
TechnipFMC
FTI
$29.1B
| $377K | ﹤0.01% |
14,400
-9,800
| -40% | -$260K |
|
|
3889
IAMGOLD
IAG
$8.24B
| $376K | ﹤0.01% |
+72,061
| New | +$333K |
|
3890
CALL
Goosehead Insurance
GSHD
$1.59B
| $375K | ﹤0.01% |
4,200
+2,500
| +147% | +$198K |
|
3891
FerroAtlántica
GSM
$619M
| $375K | ﹤0.01% |
80,906
+44,604
| +123% | +$216K |
|
3892
CALL
Privia Health
PRVA
$3.15B
| $375K | ﹤0.01% |
20,600
-13,400
| -39% | -$256K |
|
3893
PUT
Thomson Reuters
TRI
$45.3B
| $375K | ﹤0.01% |
2,166
+788
| +57% | +$133K |
|
3894
CALL
Vestis
VSTS
$2.06B
| $375K | ﹤0.01% |
25,200
-70,900
| -74% | -$952K |
|
|
TUZ
3895
PUT
DELISTED
PIMCO 1-3 Year U.S. Treasury Index Exchange-Traded Fund
TUZ
| $375K | ﹤0.01% |
5,000
-5,400
| -52% | -$405K |
|
3896
CALL
Cal-Maine
CALM
$4.38B
| $374K | ﹤0.01% |
5,000
-2,400
| -32% | -$166K |
|
3897
Jackson Financial
JXN
$8.58B
| $374K | ﹤0.01% |
4,109
+1,968
| +92% | +$164K |
|
|
3898
PUT
IAMGOLD
IAG
$8.24B
| $373K | ﹤0.01% |
71,500
+24,000
| +51% | +$111K |
|
3899
MaxLinear
MXL
$5.32B
| $373K | ﹤0.01% |
25,814
+12,928
| +100% | +$205K |
|
3900
VinFast Auto
VFS
$6.93B
| $373K | ﹤0.01% |
97,821
-127,915
| -57% | -$506K |
|
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.