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 |
Microsoft
MSFT
|
+$234M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$97.5M |
| 3 |
Amazon
AMZN
|
+$96.8M |
| 4 |
iShares Bitcoin Trust
IBIT
|
+$80.6M |
| 5 |
Pinduoduo
PDD
|
+$54.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$129M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$92.9M |
| 3 |
Broadcom
AVGO
|
+$82.9M |
| 4 |
Alphabet (Google) Class C
GOOG
|
+$68.4M |
| 5 |
Meta Platforms (Facebook)
META
|
+$59.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.79% |
| 2 | Consumer Discretionary | 0.3% |
| 3 | Healthcare | 0.25% |
| 4 | Financials | 0.17% |
| 5 | Industrials | 0.09% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
6326
PUT
Trimble
TRMB
$13.6B
| $57K | ﹤0.01% |
700
-19,500
| -97% | -$1.59M |
|
|
UMH
6327
UMH Properties
UMH
$1.34B
| $57K | ﹤0.01% |
3,902
+2,732
| +234% | +$43.7K |
|
6328
Vir Biotechnology
VIR
$1.46B
| $57K | ﹤0.01% |
10,010
+7,464
| +293% | +$38.2K |
|
|
QDVO
6329
Amplify CWP Growth & Income ETF
QDVO
$708M
| $57K | ﹤0.01% |
+1,988
| New | +$56.6K |
|
|
NVDG
6330
Leverage Shares 2X Long NVDA Daily ETF
NVDG
$37.6M
| $57K | ﹤0.01% |
2,876
+917
| +47% | +$16.5K |
|
6331
CALL
Arcosa
ACA
$7.11B
| $56K | ﹤0.01% |
600
-900
| -60% | -$83.7K |
|
6332
ANI Pharmaceuticals
ANIP
$1.86B
| $56K | ﹤0.01% |
612
-1,927
| -76% | -$157K |
|
6333
Blackbaud
BLKB
$1.94B
| $56K | ﹤0.01% |
884
+49
| +6% | +$3.21K |
|
|
BZUN
6334
Baozun
BZUN
$179M
| $56K | ﹤0.01% |
13,948
-55,165
| -80% | -$179K |
|
6335
CALL
EnerSys
ENS
$6.43B
| $56K | ﹤0.01% |
500
-2,300
| -82% | -$226K |
|
6336
PUT
KBR
KBR
$4.56B
| $56K | ﹤0.01% |
1,200
| – | – |
|
6337
CALL
KT
KT
$8.74B
| $56K | ﹤0.01% |
2,900
+2,800
| +2,800% | +$57.1K |
|
6338
CALL
Phreesia
PHR
$689M
| $56K | ﹤0.01% |
2,400
-400
| -14% | -$10.9K |
|
6339
CALL
PSQ Holdings
PSQH
$12.4M
| $56K | ﹤0.01% |
1,980
-433
| -18% | -$13.2K |
|
6340
First Trust Nasdaq Artificial Intelligence and Robotics ETF
ROBT
$700M
| $56K | ﹤0.01% |
1,073
+654
| +156% | +$33K |
|
6341
Texas Roadhouse
TXRH
$13.7B
| $56K | ﹤0.01% |
341
-3,815
| -92% | -$672K |
|
|
BMNU
6342
T-REX 2X Long BMNR Daily Target ETF
BMNU
$218M
| $56K | ﹤0.01% |
+203
| New | +$55.1K |
|
|
AFCG
6343
CALL
AFC Gamma
AFCG
$60.9M
| $55K | ﹤0.01% |
+14,600
| New | +$64.9K |
|
6344
PUT
American Public Education
APEI
$940M
| $55K | ﹤0.01% |
+1,400
| New | +$44.4K |
|
|
OPTU
6345
PUT
Optimum Communications Inc
OPTU
$298M
| $55K | ﹤0.01% |
22,900
+2,700
| +13% | +$6.62K |
|
6346
AudioCodes
AUDC
$239M
| $55K | ﹤0.01% |
5,852
+3,741
| +177% | +$36.7K |
|
6347
Breakwave Dry Bulk Shipping ETF
BDRY
$28.1M
| $55K | ﹤0.01% |
7,392
-12,754
| -63% | -$97.7K |
|
6348
PUT
Crescent Capital BDC
CCAP
$405M
| $55K | ﹤0.01% |
3,900
-500
| -11% | -$7.49K |
|
6349
CALL
Vita Coco
COCO
$3.86B
| $55K | ﹤0.01% |
1,300
+600
| +86% | +$22.2K |
|
6350
PUT
National Vision
EYE
$1.76B
| $55K | ﹤0.01% |
1,900
-12,000
| -86% | -$295K |
|
Similar funds
Simplex Trading's Q3 2025 Portfolio in Review
As of Q3 2025, Simplex Trading held 10,358 positions worth $195B, up 12% from $175B the previous quarter. Its ten largest holdings account for 46% of the portfolio.
Simplex Trading's Q3 2025 filing shows 1,743 new, 3,828 increased, 3,250 reduced and 1,308 closed positions. Its largest new stake was Microsoft: 458,309 shares worth $237M. The largest sale was iShares 20+ Year Treasury Bond ETF, an estimated $129M.
By sector, the portfolio is most concentrated in Technology at 0.79% of assets, up from 0.74% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2025 buy was Microsoft: 458,309 shares worth $237M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q3 2025, an estimated $97.5M increase.
- Simplex Trading's biggest Q3 2025 reduction was Alphabet (Google) Class A, cutting an estimated $92.9M.
- Simplex Trading fully exited iShares 20+ Year Treasury Bond ETF in Q3 2025, selling an estimated $129M.
- Simplex Trading's ten largest holdings make up 46% of its $195B portfolio in Q3 2025.
- Simplex Trading opened 1,743 new positions and closed 1,308 in Q3 2025.
- Simplex Trading's portfolio value rose 12% quarter-over-quarter to $195B.
Based on Simplex Trading's 13F filing for Q3 2025, filed 12 Nov 2025.