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 | |
|---|---|---|---|---|---|---|
3301
Limoneira
LMNR
$242M
| $658K | ﹤0.01% |
24,861
+24,798
| +39,362% | +$569K |
|
3302
TransAlta
TAC
$4.24B
| $658K | ﹤0.01% |
63,599
+59,595
| +1,488% | +$496K |
|
|
BAND
3303
CALL
Bandwidth Inc
BAND
$1.83B
| $656K | ﹤0.01% |
37,500
-8,500
| -18% | -$151K |
|
3304
CALL
Cardlytics
CDLX
$21.7M
| $656K | ﹤0.01% |
20,520
-120
| -0.6% | -$6.66K |
|
3305
CALL
CryoPort
CYRX
$763M
| $656K | ﹤0.01% |
81,000
+69,000
| +575% | +$565K |
|
3306
CALL
Banco Macro
BMA
$5.9B
| $654K | ﹤0.01% |
10,300
+4,400
| +75% | +$254K |
|
3307
CALL
Iridium Communications
IRDM
$4.87B
| $654K | ﹤0.01% |
21,500
-5,600
| -21% | -$153K |
|
3308
CALL
Immatics
IMTX
$1.18B
| $653K | ﹤0.01% |
57,300
-17,100
| -23% | -$202K |
|
3309
PUT
Flex
FLEX
$42.5B
| $652K | ﹤0.01% |
21,500
-15,000
| -41% | -$461K |
|
3310
PUT
FerroAtlántica
GSM
$619M
| $652K | ﹤0.01% |
140,600
-200
| -0.1% | -$968 |
|
|
UROY
3311
CALL
Uranium Royalty Corp
UROY
$400M
| $651K | ﹤0.01% |
265,800
+92,400
| +53% | +$208K |
|
3312
CALL
Ligand Pharmaceuticals
LGND
$5.95B
| $650K | ﹤0.01% |
6,500
-100
| -2% | -$10.1K |
|
3313
CALL
Leonardo DRS
DRS
$12.9B
| $649K | ﹤0.01% |
23,000
-10,200
| -31% | -$280K |
|
3314
CALL
NNN REIT
NNN
$9.36B
| $649K | ﹤0.01% |
13,400
-8,400
| -39% | -$388K |
|
|
SILV
3315
PUT
DELISTED
SilverCrest Metals Inc. Common Shares
SILV
| $649K | ﹤0.01% |
70,200
-1,300
| -2% | -$11.5K |
|
3316
CALL
Zevra Therapeutics
ZVRA
$574M
| $648K | ﹤0.01% |
+93,400
| New | +$634K |
|
3317
PUT
Willis Towers Watson
WTW
$28.6B
| $647K | ﹤0.01% |
2,200
-1,700
| -44% | -$476K |
|
3318
CALL
Flowserve
FLS
$9.29B
| $646K | ﹤0.01% |
12,500
-16,900
| -57% | -$814K |
|
3319
PUT
Entergy
ETR
$53.1B
| $644K | ﹤0.01% |
9,800
-27,400
| -74% | -$1.61M |
|
3320
PUT
Revolve Group
RVLV
$1.84B
| $644K | ﹤0.01% |
26,000
+18,000
| +225% | +$378K |
|
|
KEEL
3321
Keel Infrastructure Corp
KEEL
$2.45B
| $643K | ﹤0.01% |
305,129
-10,280
| -3% | -$23.8K |
|
3322
PUT
Marqeta
MQ
$1.85B
| $643K | ﹤0.01% |
32,675
+7,650
| +31% | +$160K |
|
3323
CALL
Pacific Biosciences
PACB
$422M
| $643K | ﹤0.01% |
378,600
-44,600
| -11% | -$73.3K |
|
3324
PUT
Penumbra
PEN
$12.6B
| $641K | ﹤0.01% |
3,300
+2,900
| +725% | +$548K |
|
3325
2x Long VIX Futures ETF
UVIX
$272M
| $640K | ﹤0.01% |
+678
| New | +$764K |
|
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.