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 | |
|---|---|---|---|---|---|---|
3401
Target Hospitality
TH
$1.6B
| $600K | ﹤0.01% |
77,172
+8,450
| +12% | +$79K |
|
3402
PUT
Unum
UNM
$13.8B
| $600K | ﹤0.01% |
10,100
-5,200
| -34% | -$282K |
|
|
NNDM
3403
Nano Dimension
NNDM
$312M
| $599K | ﹤0.01% |
244,776
+87,913
| +56% | +$198K |
|
3404
CALL
Fastly Inc
FSLY
$3.14B
| $598K | ﹤0.01% |
79,100
-154,900
| -66% | -$1.07M |
|
3405
PUT
Ryder
R
$10.3B
| $597K | ﹤0.01% |
4,100
+3,400
| +486% | +$461K |
|
3406
Global X Cybersecurity ETF
BUG
$1.28B
| $595K | ﹤0.01% |
19,233
+15,460
| +410% | +$460K |
|
|
NNDM
3407
CALL
Nano Dimension
NNDM
$312M
| $595K | ﹤0.01% |
243,100
+76,400
| +46% | +$172K |
|
3408
CALL
Option Care Health
OPCH
$3.42B
| $594K | ﹤0.01% |
19,000
-11,400
| -38% | -$350K |
|
|
PMT
3409
CALL
PennyMac Mortgage Investment
PMT
$839M
| $594K | ﹤0.01% |
41,700
-7,900
| -16% | -$110K |
|
3410
PUT
Sterling Infrastructure
STRL
$19.5B
| $594K | ﹤0.01% |
4,100
+3,700
| +925% | +$440K |
|
3411
Calumet Specialty Products
CLMT
$3.6B
| $593K | ﹤0.01% |
33,324
-93,614
| -74% | -$1.5M |
|
3412
Extra Space Storage
EXR
$31.3B
| $593K | ﹤0.01% |
+3,291
| New | +$555K |
|
3413
iShares Russell 2000 Value ETF
IWN
$14.4B
| $593K | ﹤0.01% |
3,560
-11,970
| -77% | -$1.94M |
|
3414
CALL
Trinity Capital
TRIN
$1.56B
| $593K | ﹤0.01% |
43,700
+16,300
| +59% | +$230K |
|
|
IRBT
3415
PUT
DELISTED
iRobot
IRBT
| $592K | ﹤0.01% |
68,200
-3,300
| -5% | -$28.6K |
|
3416
PUT
Loews
L
$24.4B
| $592K | ﹤0.01% |
7,500
| – | – |
|
3417
CALL
Ardmore Shipping
ASC
$669M
| $591K | ﹤0.01% |
32,700
+13,200
| +68% | +$255K |
|
3418
CALL
Capital Southwest
CSWC
$1.46B
| $591K | ﹤0.01% |
23,400
+8,400
| +56% | +$213K |
|
3419
iShares MSCI South Korea ETF
EWY
$22.5B
| $591K | ﹤0.01% |
9,255
-10,272
| -53% | -$665K |
|
|
OSG
3420
Octave Specialty Group
OSG
$258M
| $590K | ﹤0.01% |
52,673
-19,781
| -27% | -$231K |
|
3421
PUT
Getty Images
GETY
$173M
| $590K | ﹤0.01% |
155,000
-20,800
| -12% | -$73.3K |
|
3422
PUT
GFL Environmental
GFL
$14.1B
| $590K | ﹤0.01% |
14,800
| – | – |
|
3423
RPM International
RPM
$13.8B
| $590K | ﹤0.01% |
+4,880
| New | +$565K |
|
3424
Patterson-UTI
PTEN
$3.57B
| $589K | ﹤0.01% |
77,049
+31,124
| +68% | +$287K |
|
|
SII
3425
CALL
Sprott
SII
$2.7B
| $589K | ﹤0.01% |
13,600
+3,200
| +31% | +$135K |
|
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.