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 | |
|---|---|---|---|---|---|---|
4751
Direxion Daily MSCI India Bull 2X ETF
INDL
$55.5M
| $159K | ﹤0.01% |
2,113
+686
| +48% | +$49.6K |
|
4752
Monro
MNRO
$415M
| $159K | ﹤0.01% |
+5,518
| New | +$143K |
|
4753
Valmont Industries
VMI
$8.81B
| $159K | ﹤0.01% |
+551
| New | +$154K |
|
|
JOYY
4754
CALL
JOYY Inc
JOYY
$3.73B
| $159K | ﹤0.01% |
4,400
-1,700
| -28% | -$58.5K |
|
4755
Candel Therapeutics
CADL
$689M
| $158K | ﹤0.01% |
22,838
+17,837
| +357% | +$111K |
|
4756
CALL
Sotera Health
SHC
$5B
| $158K | ﹤0.01% |
9,500
+7,600
| +400% | +$111K |
|
4757
Simply Good Foods
SMPL
$907M
| $158K | ﹤0.01% |
4,569
-9,921
| -68% | -$336K |
|
4758
ASE Group
ASX
$68.3B
| $157K | ﹤0.01% |
16,106
-1,603
| -9% | -$16.3K |
|
4759
PUT
CorMedix
CRMD
$564M
| $157K | ﹤0.01% |
19,500
-40,700
| -68% | -$220K |
|
4760
CALL
Kulicke & Soffa
KLIC
$4.34B
| $157K | ﹤0.01% |
3,500
-2,400
| -41% | -$106K |
|
|
MESO
4761
Mesoblast
MESO
$1.83B
| $157K | ﹤0.01% |
19,304
+10,652
| +123% | +$72.3K |
|
4762
CALL
Napco Security Technologies
NSSC
$1.3B
| $157K | ﹤0.01% |
3,900
+3,600
| +1,200% | +$176K |
|
4763
Plug Power
PLUG
$2.65B
| $157K | ﹤0.01% |
69,842
-391,382
| -85% | -$877K |
|
|
REVG
4764
CALL
DELISTED
REV Group
REVG
| $157K | ﹤0.01% |
5,600
+4,800
| +600% | +$132K |
|
4765
Revvity
RVTY
$12.6B
| $157K | ﹤0.01% |
1,234
-3,285
| -73% | -$386K |
|
4766
CALL
Brixmor Property Group
BRX
$9.72B
| $156K | ﹤0.01% |
5,600
-26,800
| -83% | -$692K |
|
4767
CALL
Fidelity Enhanced Large Cap Core ETF
FELC
$7.78B
| $156K | ﹤0.01% |
3,800
-2,300
| -38% | -$71.2K |
|
4768
CALL
Flowers Foods
FLO
$1.58B
| $156K | ﹤0.01% |
6,800
-4,600
| -40% | -$104K |
|
4769
CALL
Kymera Therapeutics
KYMR
$8.66B
| $156K | ﹤0.01% |
3,300
-700
| -18% | -$30.9K |
|
4770
PUT
LCI Industries
LCII
$2.59B
| $156K | ﹤0.01% |
1,300
-9,900
| -88% | -$1.12M |
|
4771
CALL
Markel Group
MKL
$25.2B
| $156K | ﹤0.01% |
+100
| New | +$157K |
|
4772
Sigma Lithium
SGML
$1.05B
| $156K | ﹤0.01% |
12,651
-7,379
| -37% | -$80.5K |
|
4773
Solid Biosciences
SLDB
$792M
| $156K | ﹤0.01% |
22,445
+21,884
| +3,901% | +$177K |
|
4774
CALL
Allogene Therapeutics
ALLO
$625M
| $155K | ﹤0.01% |
55,700
-13,000
| -19% | -$34.7K |
|
4775
Axos Financial
AX
$5.58B
| $155K | ﹤0.01% |
+2,480
| New | +$163K |
|
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.