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 | |
|---|---|---|---|---|---|---|
2526
PUT
Ryman Hospitality Properties
RHP
$8.4B
| $1.51M | ﹤0.01% |
14,100
+12,700
| +907% | +$1.3M |
|
|
KEEL
2527
CALL
Keel Infrastructure Corp
KEEL
$2.57B
| $1.5M | ﹤0.01% |
712,800
-151,500
| -18% | -$351K |
|
|
HAPN
2528
CALL
Happen Inc
HAPN
$2.08B
| $1.5M | ﹤0.01% |
131,500
+62,800
| +91% | +$670K |
|
2529
CALL
Credicorp
BAP
$30.9B
| $1.5M | ﹤0.01% |
8,300
-2,500
| -23% | -$426K |
|
2530
PUT
Warby Parker
WRBY
$3.01B
| $1.5M | ﹤0.01% |
92,000
-14,700
| -14% | -$221K |
|
2531
PUT
Kyndryl
KD
$2.66B
| $1.5M | ﹤0.01% |
65,300
+10,000
| +18% | +$244K |
|
|
EXE
2532
Expand Energy Corp
EXE
$21.9B
| $1.5M | ﹤0.01% |
+18,233
| New | +$1.39M |
|
2533
CALL
TransUnion
TRU
$14.8B
| $1.5M | ﹤0.01% |
14,300
-1,800
| -11% | -$162K |
|
2534
Acadia Healthcare
ACHC
$3.17B
| $1.5M | ﹤0.01% |
23,607
-3,805
| -14% | -$275K |
|
|
ALTM
2535
CALL
DELISTED
Arcadium Lithium plc
ALTM
| $1.5M | ﹤0.01% |
524,800
-8,200
| -2% | -$23.7K |
|
2536
CALL
Mohawk Industries
MHK
$6.9B
| $1.49M | ﹤0.01% |
9,300
+4,300
| +86% | +$619K |
|
2537
PUT
Lumentum
LITE
$59.4B
| $1.49M | ﹤0.01% |
23,500
-37,600
| -62% | -$2.04M |
|
2538
PUT
McEwen Inc
MUX
$1.03B
| $1.49M | ﹤0.01% |
160,100
+33,800
| +27% | +$312K |
|
2539
PUT
Rapid7
RPD
$634M
| $1.49M | ﹤0.01% |
37,300
-37,200
| -50% | -$1.4M |
|
2540
PUT
Applied Digital
APLD
$7.77B
| $1.48M | ﹤0.01% |
179,800
+152,200
| +551% | +$806K |
|
2541
Blackstone Mortgage Trust
BXMT
$2.82B
| $1.48M | ﹤0.01% |
78,018
+73,845
| +1,770% | +$1.36M |
|
2542
PUT
Klaviyo
KVYO
$4.91B
| $1.48M | ﹤0.01% |
41,900
+27,900
| +199% | +$809K |
|
2543
CALL
Greif
GEF
$4.47B
| $1.48M | ﹤0.01% |
23,600
+10,400
| +79% | +$638K |
|
2544
CALL
Murphy Oil
MUR
$5.58B
| $1.48M | ﹤0.01% |
43,800
+21,800
| +99% | +$823K |
|
2545
CALL
BBVA Argentina
BBAR
$3.85B
| $1.48M | ﹤0.01% |
142,400
+110,600
| +348% | +$1.08M |
|
2546
CALL
Modine Manufacturing
MOD
$12.8B
| $1.47M | ﹤0.01% |
11,100
+5,400
| +95% | +$597K |
|
2547
PUT
Repligen
RGEN
$7.44B
| $1.47M | ﹤0.01% |
9,900
-1,500
| -13% | -$215K |
|
2548
CALL
Eldorado Gold
EGO
$8.31B
| $1.47M | ﹤0.01% |
84,800
-36,300
| -30% | -$611K |
|
2549
PUT
Knight Transportation
KNX
$11.8B
| $1.47M | ﹤0.01% |
27,300
-63,600
| -70% | -$3.29M |
|
|
HES
2550
DELISTED
Hess
HES
| $1.47M | ﹤0.01% |
10,834
+7,599
| +235% | +$1.06M |
|
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.