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 | |
|---|---|---|---|---|---|---|
3751
PUT
Boston Beer
SAM
$1.91B
| $433K | ﹤0.01% |
1,500
-5,800
| -79% | -$1.62M |
|
3752
CALL
Sprout Social
SPT
$500M
| $433K | ﹤0.01% |
14,900
-37,600
| -72% | -$1.22M |
|
3753
PUT
Bit Digital
BTBT
$477M
| $432K | ﹤0.01% |
123,300
+47,400
| +62% | +$158K |
|
3754
Roivant Sciences
ROIV
$25B
| $432K | ﹤0.01% |
+37,475
| New | +$427K |
|
|
SPTN
3755
CALL
DELISTED
SpartanNash
SPTN
| $432K | ﹤0.01% |
19,300
-1,900
| -9% | -$39.2K |
|
3756
SFL Corp
SFL
$1.59B
| $431K | ﹤0.01% |
+37,303
| New | +$446K |
|
|
MTTR
3757
DELISTED
Matterport, Inc. Class A Common Stock
MTTR
| $431K | ﹤0.01% |
95,933
-61,601
| -39% | -$269K |
|
3758
PUT
Playtika
PLTK
$1.48B
| $430K | ﹤0.01% |
54,300
-7,100
| -12% | -$53.3K |
|
3759
PUT
Ero Copper
ERO
$2.73B
| $429K | ﹤0.01% |
19,300
-4,100
| -18% | -$83.7K |
|
3760
Galicia Financial Group
GGAL
$8.03B
| $429K | ﹤0.01% |
10,206
-68,579
| -87% | -$2.39M |
|
3761
CALL
Mid-America Apartment Communities
MAA
$15.5B
| $429K | ﹤0.01% |
2,700
-6,400
| -70% | -$975K |
|
|
TEM
3762
Tempus AI
TEM
$7.73B
| $429K | ﹤0.01% |
+7,596
| New | +$355K |
|
|
SW
3763
CALL
Smurfit Westrock
SW
$26.3B
| $429K | ﹤0.01% |
+8,700
| New | +$396K |
|
3764
CALL
Rush Enterprises Class A
RUSHA
$5.98B
| $427K | ﹤0.01% |
8,100
+5,200
| +179% | +$258K |
|
3765
CALL
Buckle
BKE
$2.25B
| $426K | ﹤0.01% |
9,700
+6,700
| +223% | +$275K |
|
3766
Burford Capital
BUR
$922M
| $426K | ﹤0.01% |
32,165
-37,037
| -54% | -$491K |
|
3767
CALL
Kosmos Energy
KOS
$1.45B
| $426K | ﹤0.01% |
105,900
-174,600
| -62% | -$851K |
|
|
YALA
3768
PUT
Yalla Group
YALA
$809M
| $426K | ﹤0.01% |
94,000
+16,100
| +21% | +$67.4K |
|
3769
Grab
GRAB
$13.7B
| $425K | ﹤0.01% |
+111,916
| New | +$381K |
|
3770
Hertz
HTZ
$632M
| $425K | ﹤0.01% |
128,788
-89,500
| -41% | -$313K |
|
3771
PUT
Oxford Industries
OXM
$602M
| $425K | ﹤0.01% |
4,900
+4,800
| +4,800% | +$442K |
|
3772
CALL
Tenaris
TS
$28.5B
| $425K | ﹤0.01% |
13,400
-6,900
| -34% | -$205K |
|
|
ZUO
3773
CALL
DELISTED
Zuora, Inc.
ZUO
| $425K | ﹤0.01% |
49,400
-55,900
| -53% | -$496K |
|
3774
Xtrackers Harvest CSI 300 China A-Shares ETF
ASHR
$1.57B
| $424K | ﹤0.01% |
+14,844
| New | +$351K |
|
|
SILA
3775
CALL
DELISTED
Sila Realty Trust
SILA
| $424K | ﹤0.01% |
+16,800
| New | +$395K |
|
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.