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 | |
|---|---|---|---|---|---|---|
3526
Bausch + Lomb
BLCO
$5.8B
| $532K | ﹤0.01% |
27,604
-2,989
| -10% | -$49.4K |
|
3527
NOV
NOV
$7.35B
| $531K | ﹤0.01% |
33,255
+21,954
| +194% | +$390K |
|
|
SGI
3528
CALL
Somnigroup International
SGI
$15.3B
| $529K | ﹤0.01% |
9,700
-94,800
| -91% | -$4.82M |
|
3529
CALL
Axalta
AXTA
$7.22B
| $528K | ﹤0.01% |
14,600
-1,100
| -7% | -$38.6K |
|
3530
ProShares Short Bitcoin Strategy ETF
BITI
$103M
| $527K | ﹤0.01% |
14,149
-3,002
| -18% | -$120K |
|
3531
CALL
Sanmina
SANM
$11.2B
| $527K | ﹤0.01% |
7,700
-1,600
| -17% | -$110K |
|
3532
CALL
Q2 Holdings
QTWO
$3.64B
| $526K | ﹤0.01% |
6,600
-13,600
| -67% | -$960K |
|
3533
PUT
United Natural Foods
UNFI
$2.97B
| $526K | ﹤0.01% |
31,300
-25,400
| -45% | -$363K |
|
|
VRN
3534
CALL
DELISTED
Veren
VRN
| $526K | ﹤0.01% |
85,600
-10,400
| -11% | -$74.3K |
|
3535
PUT
Invesco DB Commodity Index Tracking Fund
DBC
$1.67B
| $525K | ﹤0.01% |
23,600
-3,900
| -14% | -$87.1K |
|
3536
PUT
National Beverage
FIZZ
$2.93B
| $525K | ﹤0.01% |
11,200
+9,100
| +433% | +$432K |
|
3537
CALL
Immersion
IMMR
$256M
| $524K | ﹤0.01% |
58,800
+20,800
| +55% | +$212K |
|
3538
Mid-America Apartment Communities
MAA
$15.5B
| $524K | ﹤0.01% |
3,300
+2,184
| +196% | +$333K |
|
3539
CALL
OceanFirst Financial
OCFC
$1.7B
| $524K | ﹤0.01% |
28,200
+18,400
| +188% | +$316K |
|
3540
PUT
Establishment Labs
ESTA
$2.71B
| $523K | ﹤0.01% |
12,100
-4,400
| -27% | -$191K |
|
3541
Kosmos Energy
KOS
$1.45B
| $523K | ﹤0.01% |
+129,854
| New | +$633K |
|
3542
PUT
NCR Atleos
NATL
$3.47B
| $522K | ﹤0.01% |
18,300
+11,400
| +165% | +$332K |
|
3543
Ryan Specialty Holdings
RYAN
$5.59B
| $522K | ﹤0.01% |
7,868
+7,175
| +1,035% | +$448K |
|
3544
CALL
Kodak
KODK
$788M
| $521K | ﹤0.01% |
110,500
+46,200
| +72% | +$241K |
|
|
KREF
3545
KKR Real Estate Finance Trust
KREF
$471M
| $521K | ﹤0.01% |
+42,264
| New | +$473K |
|
3546
PUT
Alcon
ALC
$32.8B
| $520K | ﹤0.01% |
5,200
-12,700
| -71% | -$1.19M |
|
3547
PUT
AMC Global Media
AMCX
$445M
| $520K | ﹤0.01% |
59,900
+24,200
| +68% | +$234K |
|
3548
PUT
Cogent Biosciences
COGT
$6.91B
| $519K | ﹤0.01% |
48,100
-4,600
| -9% | -$44.8K |
|
3549
CALL
Arcutis Biotherapeutics
ARQT
$3.48B
| $518K | ﹤0.01% |
55,700
-21,800
| -28% | -$215K |
|
3550
PUT
Atea Pharmaceuticals
AVIR
$386M
| $518K | ﹤0.01% |
154,800
-309,600
| -67% | -$1.12M |
|
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.